The document describes specifications for a Digital Water Level Recorder (DWLR) that uses a bubbler system to measure and record water levels over time. Key points:
- The DWLR uses a pressure sensor and bubbler system to measure water levels, compensating for ambient air pressure. It records readings hourly or in adjustable intervals.
- It is designed to operate reliably under field conditions for 10+ years, requiring battery replacement every 6 months at most.
- Recorded data containing time, date, and station info is stored and can be retrieved through an interface to a laptop.
- Specifications include accuracy of 0.1% or better, non-volatile memory to store 10,
The document describes specifications for a Digital Water Level Recorder (DWLR) that is used to record water level readings over time. Key points:
- The DWLR must reliably record water levels using a pressure sensor, compensate for ambient air pressure, have a short settling time, and not require a stilling well.
- It stores over 20,000 readings with date/time stamps in non-volatile memory. Data can be retrieved through an interface to a laptop.
- The DWLR is expected to operate accurately for at least 10 years on standard lithium batteries, recording levels every 1 hour (adjustable).
The document specifies requirements for a Digital Water Level Recorder that uses a float and shaft encoder sensor to measure and record water levels over time. Key requirements include: the instrument must operate reliably under environmental conditions, have an expected lifetime of 10 years, store at least 20,000 water level readings with date and time stamps, and interface with a Data Retrieval System to download data. The data must be recorded at intervals between 10 minutes to 24 hours and exported in a standard text file format for analysis.
This document provides specifications for procuring digital water level recorders (DWLR). It includes requirements for the pressure sensor, data logger, enclosures, cable, data retrieval system, software, accessories, and testing/acceptance protocols. Key requirements include: the pressure sensor must compensate for barometric pressure changes; the data logger must store at least 10,000 readings with date/time stamps and error codes; the system must operate accurately from 0-50°C and remain submerged for 6 months; and a testing protocol is provided to ensure proper functionality before acceptance.
Density Compensation Module for Drexelbrook Universal IV Water Cut MonitorAMETEK STC
Need for density compensation?
Drexelbrook offers a density compensation module (DCM) for its Universal IV in-line water cut monitor (CM). The module automatically compensates for density changes that may occur in the compensation of products and reduces the calibration requirements due to those changes.
Learn more about the density compensation module from Drexelbrook at http://www.drexelbrook.com/Analytical-Products/Universal-IV-CM.aspx
Data Acquisition Equipment for Automation and Process ControlMiller Energy, Inc.
Power generation, process automation, and factory automation in manufacturing industries require rigorous, continuous monitoring in the control room. Yokogawa's DX series recorders are purpose-built data acquisition systems designed for industrial automation.
The 212 Heat Calculator is designed to measure the energy consumed in hot water heating systems and chilled water
cooling systems. The 212 will interface with a wide range
of flowmeters, including vortex and magnetic flowmeters with pulse outputs, positive displacement and inferential water meters, turbine and paddle wheel flowmeters.
GridPoint\’s Energy Management System Intelligent ControllersMichele_Zambrano333
GridPoint offers a new breed of intelligent Energy Management System (EMS)controllers equipped with revenue-grade accurate metering devices to monitor electricity, natural gas, propane, or water consumption. Our patented system transcends traditional energy management systems while having the ability to submeter, interface with alarm security systems, provides information to assist in monitoring facility maintenance services, and much more. The EMS delivers rapid ROI for buildings of 1,500 square feet and above.
This document provides technical specifications for instruments for the automation of seismological observatories in Kerala, India. It includes specifications for:
1. Broadband seismic sensors with triaxial configuration, velocity transducer, frequency response between 120 sec to 50Hz, and other features.
2. Data acquisition systems with 24-bit digitizers, sampling rates from 1-500 samples per second, GPS timing, and other components.
3. Accelerographs with triaxial configuration, 24-bit recording, sample rate over 200 samples per second, and other details.
4. A VSAT telemetry system to transmit seismic and accelerograph data in real-time from observatories to a central recording station.
The document describes specifications for a Digital Water Level Recorder (DWLR) that is used to record water level readings over time. Key points:
- The DWLR must reliably record water levels using a pressure sensor, compensate for ambient air pressure, have a short settling time, and not require a stilling well.
- It stores over 20,000 readings with date/time stamps in non-volatile memory. Data can be retrieved through an interface to a laptop.
- The DWLR is expected to operate accurately for at least 10 years on standard lithium batteries, recording levels every 1 hour (adjustable).
The document specifies requirements for a Digital Water Level Recorder that uses a float and shaft encoder sensor to measure and record water levels over time. Key requirements include: the instrument must operate reliably under environmental conditions, have an expected lifetime of 10 years, store at least 20,000 water level readings with date and time stamps, and interface with a Data Retrieval System to download data. The data must be recorded at intervals between 10 minutes to 24 hours and exported in a standard text file format for analysis.
This document provides specifications for procuring digital water level recorders (DWLR). It includes requirements for the pressure sensor, data logger, enclosures, cable, data retrieval system, software, accessories, and testing/acceptance protocols. Key requirements include: the pressure sensor must compensate for barometric pressure changes; the data logger must store at least 10,000 readings with date/time stamps and error codes; the system must operate accurately from 0-50°C and remain submerged for 6 months; and a testing protocol is provided to ensure proper functionality before acceptance.
Density Compensation Module for Drexelbrook Universal IV Water Cut MonitorAMETEK STC
Need for density compensation?
Drexelbrook offers a density compensation module (DCM) for its Universal IV in-line water cut monitor (CM). The module automatically compensates for density changes that may occur in the compensation of products and reduces the calibration requirements due to those changes.
Learn more about the density compensation module from Drexelbrook at http://www.drexelbrook.com/Analytical-Products/Universal-IV-CM.aspx
Data Acquisition Equipment for Automation and Process ControlMiller Energy, Inc.
Power generation, process automation, and factory automation in manufacturing industries require rigorous, continuous monitoring in the control room. Yokogawa's DX series recorders are purpose-built data acquisition systems designed for industrial automation.
The 212 Heat Calculator is designed to measure the energy consumed in hot water heating systems and chilled water
cooling systems. The 212 will interface with a wide range
of flowmeters, including vortex and magnetic flowmeters with pulse outputs, positive displacement and inferential water meters, turbine and paddle wheel flowmeters.
GridPoint\’s Energy Management System Intelligent ControllersMichele_Zambrano333
GridPoint offers a new breed of intelligent Energy Management System (EMS)controllers equipped with revenue-grade accurate metering devices to monitor electricity, natural gas, propane, or water consumption. Our patented system transcends traditional energy management systems while having the ability to submeter, interface with alarm security systems, provides information to assist in monitoring facility maintenance services, and much more. The EMS delivers rapid ROI for buildings of 1,500 square feet and above.
This document provides technical specifications for instruments for the automation of seismological observatories in Kerala, India. It includes specifications for:
1. Broadband seismic sensors with triaxial configuration, velocity transducer, frequency response between 120 sec to 50Hz, and other features.
2. Data acquisition systems with 24-bit digitizers, sampling rates from 1-500 samples per second, GPS timing, and other components.
3. Accelerographs with triaxial configuration, 24-bit recording, sample rate over 200 samples per second, and other details.
4. A VSAT telemetry system to transmit seismic and accelerograph data in real-time from observatories to a central recording station.
VEGA Process Measurement (Level, Limit Level & Pressure) - Oil & Gas OffshoreThorne & Derrick UK
The document discusses instrumentation solutions from VEGA for various applications in offshore oil and gas production, including level, density, and flow measurement of drilling mud. VEGA offers a full portfolio of measurement technologies including radar, ultrasonic, guided microwave, and capacitive sensors. Their plics modular instrument system allows for customized configurations and easy installation. The technologies and products discussed can provide reliable measurement under harsh offshore conditions to ensure safety and optimize production processes.
Thermal dispersion mass flow transmitters measure mass flow by detecting heat dissipation from a heated surface. The sensor contains two mass balanced elements with precision matched RTDs. The reference sensor measures the process temperature (up to +400° F [+200° C]); the second RTD measures the temperature of the heated sensor. The power to the heater is varied to maintain a constant temperature difference above the reference temperature.
There is an inherent non-linear relationship between power and mass flow. A microprocessor compares the power against the calibration curve and converts the power requirements to the mass flow rate. Temperature is also measured to provide temperature compensation of the mass flow over the operating range of the instrument.
Series One Safety Transmitter, Pressure and Temperature SwitchIves Equipment
The One Series Safety Transmitter is a transmitter-switch for monitoring pressure or temperature and meets the requirements of SIL 2 for random integrity at HFT = 0, SIL 3 for random integrity at HFT = 1 and SIL 3 for systematic capability. The One Series Safety Transmitter incorporates UE’s patented IAW self diagnostics, redundant and diverse signal processing and software algorithms to detect abnormalities in the process and internal faults. The design is based on a powerful microprocessor that provides an extremely fast response time for emergency shutdown situations.
Rohde & Schwarz provides lightweight, rugged handheld tools to help network operators with the installation, maintenance, and troubleshooting of antenna and transmitter systems. Their portfolio includes the R&S ZVH cable and antenna analyzer for measurements on antenna systems from 100 kHz to 3.6/8 GHz, the R&S FSH spectrum analyzer for tasks related to transmitter stations from 9 kHz to 3.6/8 GHz, and the R&S PR100 portable receiver for detecting and locating interference from 9 kHz to 7.5 GHz.
This document discusses smart transmitters, which are microprocessor-based transmitters that can perform calculations and diagnostics. It describes how smart transmitters include an extra sensor to compensate for environmental disturbances and use digital communication protocols. It also summarizes the main types of process instrumentation transmitters, including those for measuring flow, temperature, pressure, and level. The advantages of smart transmitters are improved accuracy and stability with reduced maintenance needs.
VEGA Pressure & Level Measurement - Oil and Gas Offshore ApplicationsThorne & Derrick UK
The document discusses VEGA's instrumentation products for the oil and gas industry, focusing on offshore applications. It describes VEGA's modular plics® instrument system, which allows for customized sensor, fitting, electronics, and housing combinations. It also highlights VEGA's level, limit level, and pressure measurement technologies, explosion-proof certifications, and ability to operate in harsh offshore conditions. The document emphasizes the reliability, safety, and ease-of-use of VEGA's instrumentation solutions for various offshore processes.
This document specifies requirements for a sound velocity calibrator used to calibrate hydrographic echo-sounders. The calibrator measures sound velocity in water and consists of a submersible sensor and control unit connected by cable. It is designed to operate reliably in marine conditions, with the sensor sampling sound velocity accurately between 0-40°C from 1-100m depth and the control unit displaying readings for over 10,000 uses from standard batteries in daylight-readable format.
This document provides a specification sheet for the RTC-156/157 reference temperature calibrators from AMETEK. The calibrators offer high accuracy down to ±0.04°C, excellent stability of 0.005°C, and a wide temperature range from -30°C to 155°C. Key features include improved temperature homogeneity through an active dual-zone block, dynamic load compensation for perfect temperature uniformity, and intelligent reference sensors with stored calibration data. The calibrators communicate via USB and provide best-in-class performance according to EURAMET guidelines.
Siemens Terminal Box Controller (APOGEE Automation System )CONTROLS & SYSTEMS
The document describes the Siemens Terminal Box Controller, which provides direct digital control for variable air volume HVAC systems. The controller can operate independently or as part of the APOGEE Automation System to control various HVAC applications. It interfaces with sensors, actuators, and the Portable Operator's Terminal for monitoring and configuration. Key features include PID control, unique control algorithms, HVAC diagnostics, and energy management capabilities.
The G5 Instruments are high performance single-channel weight indicators (PM model, panel mounted) or weight transmitters (RM model, DIN rail mounted) intended for industrial systems.
The basic function is to convert the signals from strain gauge transducers to useful weight information. Transducer excitation is included as well as parameter controlled signal processing, indication of output levels, error supervision and operation of optional external equipment.
As long as the error supervision detects no error, a signal called ‘In process’ is then present but if an error is detected, ‘In process’ will be off and a specific error message will be displayed. ‘In process’ can be set to control any digital output. Note that there are weighing channel specific and instrument specific error detection.
All functions in the G5 Instrument are controlled by set-up parameters. Setting of parameter values can be done from the PM front panel. Set-up of a RM model must be done with a web browser in a PC that is connected to the instrument via Ethernet. Maintenance functions can be accessed locally (PM) or remotely (PM and RM).
Best Seller - Dry Block Temperature CalibratorTariq Kusuma
This document describes a new temperature calibrator called the RTC. It has three key features:
1. Dynamic Load Compensation (DLC) technology that uses a special sensor to ensure excellent temperature uniformity inside the insert, even when calibrating large or many sensors at once.
2. Intelligent reference sensors that contain calibration data, eliminating errors from manual data entry and allowing plug-and-play use.
3. A large, easy-to-read color display and intuitive interface for simplified navigation and viewing of calibration status information.
GE Advanced Modular Calibrator for Process Measurement InstrumentsFlow-Tech, Inc.
The DPI 620 Genii is an easy to use, rugged, and highly accurate multifunction instrument for calibrating & maintaining process instrumentation. Its modular design and functionality means it can be expanded over time and tailored to applications as needs change. With options that include HART / Fieldbus / Profibus communications, it’s a powerful, simple to use and high accuracy calibrator.
Yokogawa understands very well that reliable, high-performance field- wireless solutions are important for end-users to trust and adopt field wireless in their plants.
The document provides an overview of the GreenLine family of industrial speed sensors and control modules from JAQUET TECHNOLOGY GROUP. It describes the various sensor technologies, models, and applications they serve. The GreenLine offers over 50 sensor models and 4 tachometer modules for speed sensing and control applications across industries. Sensors are available with VR or Hall technologies in different sizes and capability ranges.
This document summarizes Roxar's downhole monitoring product portfolio. Some key points:
- Roxar has over 25 years of experience providing reliable downhole monitoring solutions from complex wells around the world.
- Their intelligent downhole network allows operators to install up to 32 sensors on a single cable to monitor pressure, temperature, and flow rates from multiple zones simultaneously.
- They provide interface units to deploy their monitoring systems subsea at depths up to 3,048 meters and in harsh environments through explosion proof and weatherproof enclosures.
- New wireless technologies allow them to monitor well casing integrity through real-time pressure and temperature measurements in previously inaccessible areas like the B annulus.
The Portaflow 220 is a portable flow measurement and recording system that uses ultrasonic transit time technology to measure fluid flow rates and velocities in pipes from 13mm to 1000mm in diameter. It has a large, backlit display and simple quick start setup. Outputs include 4-20mA analog output and pulse output proportional to flow rate. The system components include the Portaflow 220 instrument, transducers, cables, mounting hardware, and a carrying case. It is designed for non-invasive flow measurement in applications like water, energy, manufacturing, and more.
This document discusses how SCADA (Supervisory Control and Data Acquisition) systems can help drinking water organizations comply with the Drinking Water Standards for New Zealand (DWSNZ). SCADA systems measure and acquire data from water infrastructure over distances and play an important role in monitoring water quality parameters, issuing alarms if standards are exceeded, controlling treatment systems, and reporting data. The document outlines the typical components of a SCADA system, including plants, instrumentation, remote terminals, communication systems, data processing, storage and reporting. It also discusses challenges water organizations face in using SCADA to meet DWSNZ requirements and ensuring data validity, adequate sampling rates, and traceability.
The TIDALFLUX 2000 flow sensor with integrated and non-contact capacitive level measuring system provides accurate flow measurement in partially filled pipes.
TIDALFLUX is designed to measure reliably between 10% and 100% of the pipe cross section. The integrated level sensors in the liner are in no contact with the liquid and are therefore insensitive against fat and oil floating on the surface.
This document discusses telemetry, data transmission systems, and data acquisition systems. It begins with an introduction to telemetry, which involves measuring values remotely and transmitting the data. There are then sections that describe: the basic components and block diagram of a telemetry system; factors that influence system design such as accuracy and data transmission method; different types of telemetry systems including landline, radio frequency, and pulse modulation systems; and applications of data loggers and considerations for choosing one.
The document specifies requirements for a cup-type current meter used to measure water velocity and discharge in rivers and canals. It must operate reliably under flow conditions, be easy to use, and include accessories for deployment. Key components are a 6-cup sensor measuring velocities from 0.05-3.5 m/s, various suspension methods including wading rods or cables, and fish weights from 25-100kg for suspended use. Accessories like tools, spare parts, and carrying cases must also be provided.
This document provides information about a training module on absorption spectroscopy. It discusses the World Bank and Government of the Netherlands funding a training program in New Delhi, India. The document includes an introduction to absorption spectroscopy, outlines the module context and profile, presents a session plan and materials including overhead masters, and discusses measuring various water quality parameters using a spectrophotometer.
VEGA Process Measurement (Level, Limit Level & Pressure) - Oil & Gas OffshoreThorne & Derrick UK
The document discusses instrumentation solutions from VEGA for various applications in offshore oil and gas production, including level, density, and flow measurement of drilling mud. VEGA offers a full portfolio of measurement technologies including radar, ultrasonic, guided microwave, and capacitive sensors. Their plics modular instrument system allows for customized configurations and easy installation. The technologies and products discussed can provide reliable measurement under harsh offshore conditions to ensure safety and optimize production processes.
Thermal dispersion mass flow transmitters measure mass flow by detecting heat dissipation from a heated surface. The sensor contains two mass balanced elements with precision matched RTDs. The reference sensor measures the process temperature (up to +400° F [+200° C]); the second RTD measures the temperature of the heated sensor. The power to the heater is varied to maintain a constant temperature difference above the reference temperature.
There is an inherent non-linear relationship between power and mass flow. A microprocessor compares the power against the calibration curve and converts the power requirements to the mass flow rate. Temperature is also measured to provide temperature compensation of the mass flow over the operating range of the instrument.
Series One Safety Transmitter, Pressure and Temperature SwitchIves Equipment
The One Series Safety Transmitter is a transmitter-switch for monitoring pressure or temperature and meets the requirements of SIL 2 for random integrity at HFT = 0, SIL 3 for random integrity at HFT = 1 and SIL 3 for systematic capability. The One Series Safety Transmitter incorporates UE’s patented IAW self diagnostics, redundant and diverse signal processing and software algorithms to detect abnormalities in the process and internal faults. The design is based on a powerful microprocessor that provides an extremely fast response time for emergency shutdown situations.
Rohde & Schwarz provides lightweight, rugged handheld tools to help network operators with the installation, maintenance, and troubleshooting of antenna and transmitter systems. Their portfolio includes the R&S ZVH cable and antenna analyzer for measurements on antenna systems from 100 kHz to 3.6/8 GHz, the R&S FSH spectrum analyzer for tasks related to transmitter stations from 9 kHz to 3.6/8 GHz, and the R&S PR100 portable receiver for detecting and locating interference from 9 kHz to 7.5 GHz.
This document discusses smart transmitters, which are microprocessor-based transmitters that can perform calculations and diagnostics. It describes how smart transmitters include an extra sensor to compensate for environmental disturbances and use digital communication protocols. It also summarizes the main types of process instrumentation transmitters, including those for measuring flow, temperature, pressure, and level. The advantages of smart transmitters are improved accuracy and stability with reduced maintenance needs.
VEGA Pressure & Level Measurement - Oil and Gas Offshore ApplicationsThorne & Derrick UK
The document discusses VEGA's instrumentation products for the oil and gas industry, focusing on offshore applications. It describes VEGA's modular plics® instrument system, which allows for customized sensor, fitting, electronics, and housing combinations. It also highlights VEGA's level, limit level, and pressure measurement technologies, explosion-proof certifications, and ability to operate in harsh offshore conditions. The document emphasizes the reliability, safety, and ease-of-use of VEGA's instrumentation solutions for various offshore processes.
This document specifies requirements for a sound velocity calibrator used to calibrate hydrographic echo-sounders. The calibrator measures sound velocity in water and consists of a submersible sensor and control unit connected by cable. It is designed to operate reliably in marine conditions, with the sensor sampling sound velocity accurately between 0-40°C from 1-100m depth and the control unit displaying readings for over 10,000 uses from standard batteries in daylight-readable format.
This document provides a specification sheet for the RTC-156/157 reference temperature calibrators from AMETEK. The calibrators offer high accuracy down to ±0.04°C, excellent stability of 0.005°C, and a wide temperature range from -30°C to 155°C. Key features include improved temperature homogeneity through an active dual-zone block, dynamic load compensation for perfect temperature uniformity, and intelligent reference sensors with stored calibration data. The calibrators communicate via USB and provide best-in-class performance according to EURAMET guidelines.
Siemens Terminal Box Controller (APOGEE Automation System )CONTROLS & SYSTEMS
The document describes the Siemens Terminal Box Controller, which provides direct digital control for variable air volume HVAC systems. The controller can operate independently or as part of the APOGEE Automation System to control various HVAC applications. It interfaces with sensors, actuators, and the Portable Operator's Terminal for monitoring and configuration. Key features include PID control, unique control algorithms, HVAC diagnostics, and energy management capabilities.
The G5 Instruments are high performance single-channel weight indicators (PM model, panel mounted) or weight transmitters (RM model, DIN rail mounted) intended for industrial systems.
The basic function is to convert the signals from strain gauge transducers to useful weight information. Transducer excitation is included as well as parameter controlled signal processing, indication of output levels, error supervision and operation of optional external equipment.
As long as the error supervision detects no error, a signal called ‘In process’ is then present but if an error is detected, ‘In process’ will be off and a specific error message will be displayed. ‘In process’ can be set to control any digital output. Note that there are weighing channel specific and instrument specific error detection.
All functions in the G5 Instrument are controlled by set-up parameters. Setting of parameter values can be done from the PM front panel. Set-up of a RM model must be done with a web browser in a PC that is connected to the instrument via Ethernet. Maintenance functions can be accessed locally (PM) or remotely (PM and RM).
Best Seller - Dry Block Temperature CalibratorTariq Kusuma
This document describes a new temperature calibrator called the RTC. It has three key features:
1. Dynamic Load Compensation (DLC) technology that uses a special sensor to ensure excellent temperature uniformity inside the insert, even when calibrating large or many sensors at once.
2. Intelligent reference sensors that contain calibration data, eliminating errors from manual data entry and allowing plug-and-play use.
3. A large, easy-to-read color display and intuitive interface for simplified navigation and viewing of calibration status information.
GE Advanced Modular Calibrator for Process Measurement InstrumentsFlow-Tech, Inc.
The DPI 620 Genii is an easy to use, rugged, and highly accurate multifunction instrument for calibrating & maintaining process instrumentation. Its modular design and functionality means it can be expanded over time and tailored to applications as needs change. With options that include HART / Fieldbus / Profibus communications, it’s a powerful, simple to use and high accuracy calibrator.
Yokogawa understands very well that reliable, high-performance field- wireless solutions are important for end-users to trust and adopt field wireless in their plants.
The document provides an overview of the GreenLine family of industrial speed sensors and control modules from JAQUET TECHNOLOGY GROUP. It describes the various sensor technologies, models, and applications they serve. The GreenLine offers over 50 sensor models and 4 tachometer modules for speed sensing and control applications across industries. Sensors are available with VR or Hall technologies in different sizes and capability ranges.
This document summarizes Roxar's downhole monitoring product portfolio. Some key points:
- Roxar has over 25 years of experience providing reliable downhole monitoring solutions from complex wells around the world.
- Their intelligent downhole network allows operators to install up to 32 sensors on a single cable to monitor pressure, temperature, and flow rates from multiple zones simultaneously.
- They provide interface units to deploy their monitoring systems subsea at depths up to 3,048 meters and in harsh environments through explosion proof and weatherproof enclosures.
- New wireless technologies allow them to monitor well casing integrity through real-time pressure and temperature measurements in previously inaccessible areas like the B annulus.
The Portaflow 220 is a portable flow measurement and recording system that uses ultrasonic transit time technology to measure fluid flow rates and velocities in pipes from 13mm to 1000mm in diameter. It has a large, backlit display and simple quick start setup. Outputs include 4-20mA analog output and pulse output proportional to flow rate. The system components include the Portaflow 220 instrument, transducers, cables, mounting hardware, and a carrying case. It is designed for non-invasive flow measurement in applications like water, energy, manufacturing, and more.
This document discusses how SCADA (Supervisory Control and Data Acquisition) systems can help drinking water organizations comply with the Drinking Water Standards for New Zealand (DWSNZ). SCADA systems measure and acquire data from water infrastructure over distances and play an important role in monitoring water quality parameters, issuing alarms if standards are exceeded, controlling treatment systems, and reporting data. The document outlines the typical components of a SCADA system, including plants, instrumentation, remote terminals, communication systems, data processing, storage and reporting. It also discusses challenges water organizations face in using SCADA to meet DWSNZ requirements and ensuring data validity, adequate sampling rates, and traceability.
The TIDALFLUX 2000 flow sensor with integrated and non-contact capacitive level measuring system provides accurate flow measurement in partially filled pipes.
TIDALFLUX is designed to measure reliably between 10% and 100% of the pipe cross section. The integrated level sensors in the liner are in no contact with the liquid and are therefore insensitive against fat and oil floating on the surface.
This document discusses telemetry, data transmission systems, and data acquisition systems. It begins with an introduction to telemetry, which involves measuring values remotely and transmitting the data. There are then sections that describe: the basic components and block diagram of a telemetry system; factors that influence system design such as accuracy and data transmission method; different types of telemetry systems including landline, radio frequency, and pulse modulation systems; and applications of data loggers and considerations for choosing one.
The document specifies requirements for a cup-type current meter used to measure water velocity and discharge in rivers and canals. It must operate reliably under flow conditions, be easy to use, and include accessories for deployment. Key components are a 6-cup sensor measuring velocities from 0.05-3.5 m/s, various suspension methods including wading rods or cables, and fish weights from 25-100kg for suspended use. Accessories like tools, spare parts, and carrying cases must also be provided.
This document provides information about a training module on absorption spectroscopy. It discusses the World Bank and Government of the Netherlands funding a training program in New Delhi, India. The document includes an introduction to absorption spectroscopy, outlines the module context and profile, presents a session plan and materials including overhead masters, and discusses measuring various water quality parameters using a spectrophotometer.
This document provides guidance on using the area-slope method to estimate stream discharge indirectly when direct measurement is not possible. It describes the principles and steps of the area-slope method, including selecting a study reach, measuring the cross-sectional area and water surface slope, evaluating velocity using Manning's formula, and computing discharge. Guidelines are given for selecting sites, measuring cross-sections and slope, determining roughness coefficients, and performing calculations. The area-slope method provides a rough estimate of discharge but has limitations due to uncertainties in roughness coefficients.
The document specifies requirements for a fiberglass reinforced plastic (FRP) boat to be used for hydrological measurements. The boat must be capable of operating safely and reliably in shallow water. It should have a sturdy hull, floatation chambers, and be unsinkable with adequate stability. The boat will include a cabin with seating and windows, work space on the deck, and will be powered by two outboard engines operated by a remote control system. It may optionally include an instrument well inside the boat for transducers.
The document provides environmental standards for discharge of pollutants into various receiving environments. It includes:
- General effluent standards for 19 parameters for discharge into inland surface waters, public sewers, and marine/coastal areas.
- Wastewater generation standards specifying the expected wastewater generation for various industries.
- Load based standards specifying limits on pollutants per unit of production for some industries.
- Concentration based emission standards for 11 parameters from stacks and equipment.
- Noise standards for automobiles and construction/industrial equipment.
The standards are meant to minimize environmental impacts and protect receiving water quality for various uses. Industries are expected to employ best practices
This document provides information on a training module about major ions in water. It includes an introduction to the module, a module profile, session plan, overheads and masters, evaluation sheets, and handouts. The module aims to help participants understand the major ions found in water and their sources, how to characterize water samples based on ion concentrations, the water quality consequences of different ions, and the technique of ion balancing to assess water quality. The session covers topics such as hardness, sodium adsorption ratio, percent sodium, and residual sodium carbonate as ways to evaluate water for irrigation use.
The document summarizes the Hydrology Project - II being implemented by the Central Ground Water Board. It provides details on project costs, expenditures, activities completed and in progress. Key points:
- Total project cost has increased from original Rs. 27.95 crore to Rs. 66.32 crore as per revised cost estimates. Expenditure so far is Rs. 38.45 crore against a target of Rs. 51.64 crore.
- Activities include upgrading hardware, procuring software, conducting training programs, pilot aquifer mapping studies, piezometer construction, and developing a decision support system.
- The pilot aquifer mapping studies have characterized aquifer systems in six areas and
This document specifies requirements for a portable echo-sounder to be used for manual depth measurement from a boat at gauging stations. Key requirements include: operating reliably in sediment-laden rivers/canals, easy to operate/maintain, 10+ year lifetime, accuracy within 0.2% of range, depth display up to 50m, battery or car battery power, and accessories like a car battery charger. The echo-sounder should suppress surface and multiple echoes to display actual water depth.
The document summarizes the occurrence and distribution of high arsenic contamination in groundwater in India. It notes that arsenic contamination above 0.05 mg/L affects states like West Bengal, Bihar, Uttar Pradesh, Assam, and Chhattisgarh. West Bengal is the worst affected area, with 79 blocks in 8 districts showing arsenic levels above permissible limits. Within West Bengal, the most contaminated districts are Malda, Murshidabad, Nadia, North 24 Parganas and South 24 Parganas. The document provides a table listing specific blocks within West Bengal districts with their maximum reported arsenic concentrations. Overall, about 162.6 lakh people in West Bengal live in areas at risk
This document is an application form for permission to abstract groundwater for infrastructure projects from the Central Ground Water Authority. It requests information about the proposed infrastructure project including location details, land use, water requirements and sources, rainwater harvesting plans, and details of existing and proposed groundwater extraction structures. The applicant must provide comprehensive information on local groundwater conditions and quality, and certify that all information submitted is true to the best of their knowledge. Incomplete applications will be rejected.
This document provides background information on India's water resources and national water policy for a consultation meeting on reviewing the policy. It discusses India's water resources potential and achievements in irrigation, drinking water, hydropower, and flood management. It also outlines projections for increased future water requirements and challenges facing the water sector like declining per capita availability and groundwater overexploitation. The document reviews the key features of the current 2002 National Water Policy and status of state-level policies. It identifies issues to be discussed during the policy review consultation meeting.
This document provides information on measuring ammonia and organic nitrogen using the Kjeldahl method, including:
1) An overview of the nitrogen cycle and how ammonia and organic nitrogen influence water quality.
2) A description of the Kjeldahl method which involves distilling ammonia for titration and digesting organic nitrogen to convert it to ammonia.
3) Details of a sample experiment to measure ammonia and organic nitrogen in various water samples using the Kjeldahl method.
The document outlines specifications for a hydrographic echo-sounder used to measure water depth in reservoirs and rivers. The echo-sounder is required to operate reliably under various environmental conditions, measure depths accurately from 0.3 to 200 meters, digitally display and record readings, and transmit data to a controlling PC for collection and analysis. It must also be durable, easy to use and maintain, and have a lifespan of at least 10 years.
This document provides information on oxygen balance in surface waters. It discusses the importance of dissolved oxygen, factors that affect oxygen saturation levels such as temperature and salinity, and the main processes that add or deplete oxygen in surface waters. These include reaeration from the air, photosynthesis by plants, and oxidation of organic matter. The document also presents the typical dissolved oxygen sag curve that occurs when organic matter is discharged into a river and oxygen is depleted before recovering through reaeration.
This document specifies the technical requirements for a DWLR (water level recorder) system, including a pressure sensor data logger, enclosure, and data retrieval system. The pressure sensor should measure water levels with 0.1% accuracy, store over 200,000 data points, and communicate via USB. The data logger enclosure must be waterproof and corrosion resistant. The data retrieval system is a laptop to download, view, and export logged data in the field.
This document outlines specifications for a groundwater data logger and telemetry system. Key requirements include:
- The system must include a pressure sensor, data logger, telemetry unit, and data retrieval software.
- The pressure sensor must measure groundwater levels accurately between 0-50m or 0-70m and withstand high pressures.
- The data logger stores at least 200,000 data points, operates for over 2 years on batteries, and supports wireless data transmission.
- The telemetry unit transmits data via GPRS/GSM once per day for 1 year on batteries and sends alerts for failures.
- The software downloads and displays data on a laptop in common formats like Excel.
The document outlines performance requirements and specifications for ultrasonic gas meters. It specifies that meters must be designed according to applicable codes and standards. It also requires manufacturers to have a quality assurance program and provide documentation on metallurgical testing, pressure testing, and dimensional measurements. The document defines minimum performance standards for accuracy, resolution, velocity sampling interval, zero flow readings and more. Larger meters have less stringent requirements.
Technical specification for 3.ph 4 wire stw 12 02-11laxman prasad
The document provides a technical specification for a 3-phase, 4-wire solid state whole current lag only energy meter with an LCD display. Key details include:
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- The meter must comply with various Indian and international standards for electricity meters.
- It must be able to operate under tropical climatic conditions with high temperatures, humidity, and rainfall.
- Electrical specifications include a class 1.0 accuracy, 240V supply voltage, 50Hz frequency, and power factor range of zero lag to unity to zero lead.
The Vanguard WirelessHART gas detector is ideal for the monitoring of toxic and combustible gases without the need for costly and fixed wiring. With a five year battery life and one button calibration, the Vanguard detector is easy to operate and maintain.
Each Vanguard detector has a WirelessHART transceiver, an antenna, a display, a long life power module, a gas sensor, and a signal processor for the gas sensor. Vanguard uses a sensor architecture trademarked “Flexsense,” which allows the sensor to identify its target gas and self-configure to a Vanguard transmitter upon connection.
The document outlines specifications for an Automatic Weather Station (AWS) system. It includes:
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- A data logger that will collect observations from sensors and store them. It must have memory to store at least a year of data, ports to interface with sensors and transmit data, and an LCD display.
- Requirements for the data and sensors to be housed in a weatherproof enclosure and operate unattended for at least a year on battery power recharged by a solar panel.
This document discusses environmental monitoring systems for the pharmaceutical industry. It summarizes specifications for wireless thermohygrometers and data loggers that continuously monitor temperature and humidity in storage and transportation to ensure compliance with regulations. Real-time monitoring allows users to receive alerts if conditions exceed limits and automatically generate reports. The systems provide accurate monitoring, long battery life, easy configuration, and remote access to data.
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This document is the operation manual for the GDS-800 Series Digital Storage Oscilloscope. It contains information about safety precautions, general features of the oscilloscope, its operation including panel description and block diagram, as well as specifications. Key features highlighted include a 5.7" LCD display, 2 input channels up to 250MHz bandwidth, automatic measurements, memory save and recall, and interface options such as RS-232, USB and GPIB.
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This document provides guidelines for the routine maintenance of stage and streamflow measurement equipment and installations. It discusses maintenance procedures for staff gauges, autographic water level recorders, digital water level recorders, current meters, and supporting equipment. Key recommendations include regularly cleaning and inspecting equipment for damage, checking instrument readings against references, downloading digital data frequently, and calibrating equipment on a set schedule or when major repairs are done. The document aims to ensure the continued collection of good quality hydrometric data through proper equipment upkeep.
The document specifies requirements for an electromagnetic current meter used to measure near-surface water velocity. It is installed 0.5m deep on a boat's bow to compensate for an ADCP's blanking distance. The sensor measures velocity in two dimensions and is controlled by a signal conditioning unit. Specifications include an ellipsoid sensor accurate to 1% with a 10m cable, and a control unit with RS-232 output updating at 1Hz, operating from 10-15V or 20-30V DC in an IP65 case at 0-50°C and 95% humidity.
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The Acoustic Doppler Current Profiler (ADCP) is used to measure river discharge from a small boat or floating platform. It measures river velocity and depth to calculate discharge. The system includes an ADCP unit, GPS, software, and a floating trimaran platform. It is designed to operate reliably in rivers up to 30 meters deep with high sediment levels, and provide accurate discharge measurements within 0.25% over a velocity range of -5 to 5 m/s.
We have Baumer make DP Transmitters. DP Transmitters are also known as Differential Pressure Transmitters, Pressure Difference Transmitters, PD Transmitters, DP Transmitters
The document outlines specifications for a Data Retrieval System (DRS) that will be used to set up, control, monitor, and retrieve data from Digital Water Level Recorders (DWLR). The DRS must be portable, lightweight, and have a 5 year lifetime. It must communicate with DWLRs and PCs via USB or wireless protocols and support error-free data exchange. The DRS should be a palmtop or laptop computer capable of programming, controlling, and downloading data from multiple DWLRs, running Windows, and operating for 12 hours on batteries.
The Cloud Point test cell is first flushed through with a fresh sample. A small amount of sample is then isolated in the cell and allowed to settle for a predetermined period to allow any air bubbles or solids to separate. The sample cell is then cooled at a controlled rate by a Peltier cooler with excess heat being removed by a coolant. An optical detector senses when the sample is starting to become cloudy as waxy components start to precipitate. The temperature at which this occurs is taken as the cloud point
This document provides a user manual for an ultrasonic level meter. It includes 3 sections:
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2. Technical specifications including a measuring range of 0-15m, accuracy of 0.3%, analog and digital output options, and operating temperature range.
3. Installation instructions covering the external dimensions, wiring, definitions of installation parameters, principles, and precautions. It provides diagrams of how the meter works and defines terms like mounting height and blind area.
The document provides specifications for the PROFITESTMASTER series of test instruments for testing residual-current protective devices (RCDs) and other electrical system components per applicable standards. Key features summarized:
1) It tests RCDs by measuring contact voltage, testing for N-PE reversal, measuring trip time at nominal residual current, and testing with varying residual currents.
2) It also tests loop and system impedance, insulation resistance with variable test voltages, low resistance of conductors, and more.
3) The instruments have a large voltage and frequency range, intelligent data transfer interface, selectable language display, and are certified according to relevant product safety and electromagnetic compatibility standards.
The AquaTROLL 600 is a customizable, powerful, and easy-to-use multiparameter sonde for monitoring water quality. It combines industry-leading sensors for measuring parameters like dissolved oxygen, pH, conductivity, and temperature, with a built-in display, long 9+ month battery life, and smartphone connectivity. This allows users to easily manage and access water quality data from remote sites using mobile apps. The sonde is designed for challenging environments and long-term deployments, and provides accurate, reliable data through self-cleaning, anti-fouling sensors and smart diagnostics.
The document summarizes a water purification system that includes a reverse osmosis unit, storage tank, and ultrapure water purification unit. The system uses a microprocessor to control purification from a municipal water supply to produce at least 35 liters/hour of water with a resistivity of 18 megohm cm or higher that is at least 99% free of bacteria, ions, organics, and particles. The system is also capable of continuous monitoring and will automatically shut off if the feed water is inadequate or the storage tank reaches capacity.
The document describes a water purifier using ion exchange resin columns that produces reagent-grade water for trace analysis. It has separate cation and anion exchange columns with a capacity of 25 liters each and can purify water at a rate over 1 liter per minute. Accessories include spare columns, instructions, a cover, and vacuum hose. Key features are an inline conductivity monitor and the ability to regenerate the resin columns.
This document provides specifications for a double distillation water purification unit. It distills water to a conductivity of 1.0 μS/cm or less at 25°C for generating reagent-grade water. The unit is made of quartz glass with a 1.5 liter/hour capacity. It runs on 220V power and includes a metallic stand, ring clamp, and operation manual. Safety features include over-heating protection and indicators.
This document provides specifications for an automatic water distillation unit. The unit distills water to generate reagent water type III with a maximum conductivity of 0.01 mS/cm at 25°C for use in washing and quantitative analysis. It has a stainless steel construction, 1.5 liter per hour capacity, operates on 220VAC power, and has automatic shutoff when water levels are low.
This document specifies a water geyser (heater) that has a 120 liter capacity, heats water to 90°C with thermostatic control, and requires a 220 VAC ±25%, 47 to 53 Hz power supply for operation in a laboratory setting.
A general purpose water bath has an inner size of approximately 0.4 x 0.3 x 0.1 meters, is made of stainless steel inside and stove enameled outside, and can maintain temperatures from ambient to 100°C with an accuracy of ±2°C. It has a stainless steel cover with 12 holes and features a drain cock or plug, double-walled insulation, and a pilot lamp to indicate thermostat operation.
This document describes the specifications of a water bath used for incubating culture tubes in coliform analysis. The water bath has an inner size of approximately 0.4 x 0.3 x 0.15 meters, is made of stainless steel inside and stove enameled outside, and can maintain temperatures from ambient to 50°C with an accuracy of ±0.1°C. It has a double wall for insulation, a dome lid to hold test tubes vertically, and displays the internal water temperature.
The document specifies the requirements for a wash bottle used to flush glassware. The wash bottle must be made of polythene, hold 500 ml of liquid, and have a bent nozzle and screw cap. It was last reviewed on October 23, 2007 and is used to wash away any sticking sediment from glassware.
The document specifies volumetric flasks that will be used for sediment analyses in a laboratory. The flasks must comply with IS 915-1975, be made of Corning glass or similar material, and come in sizes of 50, 100, 250, and 500 ml with B class accuracy.
The visual accumulation tube is used to assess particle sizes of sediments. It consists of a vertical transparent settling tube through which sediment samples are passed. Particles settle individually based on terminal velocity related to diameter, and accumulated sediment volume in the tube's narrow end relates to solid weight. It is best for uniform, spherical particles. The analysis involves introducing a small sample and recording accumulated sediment height over time.
This document provides specifications for a vacuum pump for general laboratory use. The pump is a single stage pump with a capacity of 50 l/min, capable of reaching a final vacuum of 0.05 mm Hg without ballast or 2 mm Hg with ballast. It has a 200W motor that operates on 220VAC at 47-53 Hz. Accessories include a filter, regulator, gauge, hose, and valve. The pump is designed for noise free operation.
This document provides specifications for a turbidity meter used to directly measure suspended matter in water samples. The turbidity meter has a range of 0 to 1000 NTU in at least 2 ranges, an accuracy of ±2% full scale deflection, and requires a power supply of 220 VAC ±25%, 47 to 53 Hz. Accessories for the turbidity meter include an ambient light shield, 6 spare tubes, a sensor stand, voltage stabilizer, instruction manual, and dust cover.
This tool kit contains basic tools for minor repairs of electrical laboratory equipment, including a set of screwdrivers, pliers, soldering iron, and multi-meter. The tools come in a lockable storage box for organization and security.
The document specifies the requirements for a microprocessor-controlled TOC analyzer. It must be able to directly measure total carbon, total organic carbon, and purgeable organic carbon in water samples. It uses high temperature catalytic combustion up to 900°C and non-dispersive infrared detection. It must have a measuring range of 1-500 mg/L carbon, precision within 3%, and detection limit of at least 500 ppb carbon. The analyzer and auto-sampler require 240V 50Hz power and it uses nitrogen or high purity air as carrier gases. It includes an auto-sampler, syringes, printer, manuals, spare parts, and application software in English.
This document provides specifications for a tissue grinder used to prepare tissue or sediment samples. The grinder must be able to macerate glass fibre filters and is a manual, porcelain device used to homogenize samples for further analysis such as chemical extraction.
This document specifies a set of thermometers for laboratory use, including mercury-filled glass thermometers with three temperature ranges (0-80oC, 10-150oC, 20-250oC) and an accuracy of ±0.5oC, along with a storage box for the thermometers.
This document specifies test tubes for laboratory use in sediment analysis. It outlines that the test tubes should be made of Corning glass or similar material, and lists two standard sizes - 15 x 125 mm and 25 x 200 mm in diameter and height. The test tubes are intended for general use in analyzing sediments in the laboratory.
The document specifies requirements for test sieves with a shaker. It requires stainless steel sieves that are 200mm in diameter, 50mm in height, and have nominal aperture sizes between 63-250 micrometers. It also requires a shaker capable of holding at least 5 sieves that runs on 220V power. Accessories include a sieve brush and wash bottle. Some sieves can be used manually without the shaker.
This document provides specifications for a magnetic stirrer with a hot plate. It can rotate between 0-1200 rpm and heat with a 300 Watt thermostatically controlled element. The stirrer has a stainless steel top and comes with PTFE coated magnets ranging from 10-50mm in 5mm increments, with two of each size included as accessories.
This document provides specifications for a sterilizer autoclave. The autoclave is 0.3 x 0.5 meters in size, made of stainless steel inside and lid with an enameled outside. It operates at a working pressure of 1 bar with a maximum pressure of 1.5 bars. Accessories include a pressure gauge, steam release cock, safety valve, perforated aluminum basket, water level indicator, and lifting arrangement. The autoclave is powered by 220 VAC at 47-53 Hz and uses approximately 2500 Watts.
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Dwlr, bubbler type (sw)
1. Annexure-II/iii
10.04
5
DWLR, BUBBLER TYPE (SW)
Approval Date: 28 July 2009
Version: 3
Purpose
The Digital Water Level Recorder (DWLR) is to record readings of water level versus time in
rivers, lakes and reservoirs. Optionally, the actual level reading could be shown on a LCD
display.
Conditions and requirements
• The instrument shall be of such a design that it operates reliably and accurately under
the prevailing environmental conditions.
• The instrument shall be easy to operate and
maintain.
• All materials on the instrument exterior shall be non-
corrosive.
• The recorder zero shall be adjustable to zero of
gauge.
• A pressure sensor shall measure the water level through a bubbler
system.
• The method of pressure measurement shall compensate for the effects of ambient
air- pressure, by application of a vented gauge pressure sensor or other compensation
method.
• The instrument shall have a short settling time, i.e. rated accuracy shall be reached
quickly after (re-)installation and there shall be no need to wait on site or even return
later for re- adjustment to accommodate for initial settling drift.
• The instrument shall not need a stilling well for wave and turbulence suppression but
shall
have a wave suppression filter implemented in software and/or implemented in the
bubbler system.
• All batteries associated with the DWLR, i.e. the batteries for normal operation and
the backup batteries, shall be easily replaceable by the local operator ideally using
batteries readily available in India.
• During battery replacement, the instrument settings and data shall be
retained.
• The instrument shall be supplied with the accessories as needed for effective
deployment.
• The instrument shall have an expected technical lifetime of not less than 10
years.
• The instrument shall be capable to operate at least 6 months without any
servicing.
• Calibration data and test certificate shall be part of the delivery for each
DWLR.
• The DWLR shall support adjustable specific gravity over a range of 0.9 to
1.03.
• The water level readings shall be recorded in data logger
memory.
• Data retrieval and other communication shall be possible through a Data Retrieval
System (DRS), i.e. a Palmtop Computer or a Laptop Computer (not included in the
scope of the DWLR supply) loaded with dedicated software.
• For communication with the DRS, an RS232C serial/ a USB 2.0 or better interface shall be
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-1/7
2. Annexure-II/iii
available with optional additional lrDA or Bluetooth technology.
• The delivery shall include compatible cables for connecting the DWLR to the USB port of
the DRS.
• For some DWLR implementations, interface adapters are needed to communicate with
the DRS. Any necessary adapters, including manuals, software, cables and all other
required accessories shall accompany each DRS, both for communication between
DWLR and DRS and between DWLR and PC.
• An error monitoring communication protocol shall be used. The protocol shall
ascertain error free data exchange between DWLR and DRS/PC. The protocol shall
function in both directions. Commands, programs, water level records and all other data
are exchanged under control of the protocol and data may only be accepted if they are
error free.
• The communication protocol shall be based on packet wise data exchange; the
packets shall be accompanied by a CRC code for checking at the receiving end.
Defective or not received packets shall be retransmitted upon request by the receiving
end.
• The DWLR shall be capable to measure the voltage of the internal
battery(ies).
• A simple and accurate tool to assess remaining battery lifetime shall be made
available.
The tool shall enable proper planning of battery replacement without risk of data loss due
to unexpected battery depletion. The tool may be implemented in the DWLR or
alternatively, in the DRS. The operator may be prompted to enter specific parameters.
• Operator’s and maintenance manuals, related to the type and model of the instrument,
shall be part of the delivery.
• Comprehensive operators and maintenance training for respectively field observers and
instrument specialists shall be part of the delivery.
• The proper functioning of each instrument shall be demonstrated at delivery.
Specifications
The purchaser may execute his judicious discretion in the choice of configuration and
options.
1. Pressure sensor
sensor type vented gauge or absolute with air-pressure
compensation
measuring range 0 to xx m water column (e.g. 0 to 10 or 0 to 20 m)
as per Schedule of Requirements
The Schedule of Requirements gives the numbers to be quoted for and their associated
ranges and is attached to this document. The Bidder shall specify for the closest standard
range of the offered product with respect to the required measuring range. The quoted range
shall be equal or larger than the required range.
Accuracy
overall accuracy 0.1% Full
Scale
temperature coefficient <0.01% Full Scale/ºC (on water level reading including 50 m
suspension wire)
long term stability 0.1% Full
Scale/year
reproducibility 0.05% Full
Scale
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-2/7
3. Annexure-II/iii
Note: Overall accuracy, long term stability and reproducibility include pressure sensor,
bubbler system and data logger. As no electronic components are submerged, the
electronics, bubbler system and sensor are exposed to the ambient temperature fluctuations.
The temperature coefficient covers all the combined temperature effects on pressure sensor,
bubbler system and data logger (zero and scale).
The vendor shall specify the temperature effects on: sensor reading (zero and scale effects)
and data logger. The instrument shall maintain the specified overall accuracy over a
temperature fluctuation of at least 60ºC, i.e. whatever the actual temperature coefficient, the
overall error shall not exceed the accuracy specifications as given under the item ‘overall
accuracy’.
In case of a separate sensor, the electronics unit shall be field exchangeable without
affecting the level reading beyond the rated system accuracy and such without any
requirement for adjustments to the electronics, e.g. for zero and/or span control. Adjustment
in software settings to accommodate for a sensor replacement is acceptable.
overload pressure ≥1.5 times Full
Scale
Overload pressure is the maximum pressure the sensor can sustain without effect on
calibration upon return to the rated measuring range.
burst pressure The pressure in the bubbler tube shall under no condition
been exceed the burst pressure of the pressure sensor. During
purging, the pressure sensor should be protected or
disconnected from the bubble tube.
over-voltage protection on supply and sensor wires
2. Data
logger
resolution of measurement 12 bit A/D converter or
better
measuring interval pre-set at 1 hour, adjustable from 10 minutes to 24
hours.
The measuring interval shall be user adjustable, recordings shall be executed at ‘integer
times’. Example, if the measuring interval is 30 minutes, then recording should take place at
00h00, 00h30, 01h00, etc. The first record after initiation of the instrument, should be made
at the first instant of 00 or 30 minutes in the hour.
settling time <15 minutes after commissioning
Upon installation, after submersion, the DWLR including pressure sensor and electronics,
adjusts to the changed temperature, pressure and cable tension; the water level readings
shall settle to the required accuracy within the specified settling time.
date day, month, year in the following format: DD/MM/YYYY with
leading zero’s (01/03/2001 for 1st
of March 2001)
time hh:mm:ss (0 to 23 hours, 0 to 59 minutes, 0 to 59 seconds)
with leading zero’s (08:05:07)
The specification given above is only valid for the way date and time are presented to the
user and does not apply to the way the data logger handles these.
recording capacity minimum of 10,000 water level
readings.
The recorded data shall also contain an instrument serial number and/or station identification
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-3/7
4. Annexure-II/iii
code and information on date and time of recorded water levels readings. The serial number
shall be uniquely attached to the data logger. The station identification code shall be
uniquely attached to the data logger at installation and shall not be added after data retrieval
by user interference. The memory shall have a ring organisation (endless loop). The memory
shall be protected against accidental erasure by a password or equivalent.
error marking error code, i.e. –
99.999
Out of range data and errors shall be clearly and unambiguously marked and be
distinguishable from valid data. The error mark is an impossible value, which cannot be
generated by valid measurements.
recording resolution 0.001 m or
better
memory type non volatile memory or volatile
memory
Volatile memory (RAM) shall be protected from data loss by a Lithium backup battery. The
battery capacity shall be sufficient to retain memory contents more than one year after main
power disconnection (removal of the supply batteries).
Lithium
batteries
power supply built-in standard Lithium batteries, like AA, C or D size ideally
readily available in India.
OR
Alkaline
batteries
power supply built-in standard Alkaline batteries, like AA, C or D size ideally
readily available in India
The batteries shall be easily replaceable, in the local workshop by the local technicians,
ideally using batteries readily available in India.The delivery shall include sufficient batteries
for at least one year of operation under the following conditions:
• a recording interval of 30 minutes
• every two months access of the DWLRs for full data retrieval and monitoring purposes.
remaining battery lifetime indication on DRS and/or calculation scheme
data offload power use capacity for ≥6 full data offloads per annum of rated battery
capacity, e.g. if rated battery capacity is 5 years than ≥30 full
offloads shall be supported in that 5 years.
communication interface USB at DDRS/PC end with optional additional lrDA or Bluetooth
technology.
The communication hardware between DWLR and DRS and PC shall be suitable for the
cable lengths involved. In case of online monitoring is required, it should support at
GPRS interface.
operating temperature 0 to
60°C.
The operating temperature range specification applies to all components of the DWLR, like:
sensor, cable, data logger, batteries, etc.
built-in clock time keeping better than 1 minute per
month
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-4/7
5. Annexure-II/iii
displayed time resolution 1
second
over-voltage protection on all i/o lines, regardless mode of connection during
deployment
Built-in over-voltage protection is required on the electronics unit, in particular on all external
connections, e.g. sensor supply and signal (also on optional sensors, e.g. for water quality),
external power supply and data communication interface.
water level indicator LCD display with 1 mm resolution (optional)
3. Enclosure for pressure sensor and data
logger
The sensor electronics, data logger, electronics, batteries and all other electrical
components shall be contained in one or more protective enclosures. The enclosure(s) shall
comply with the following specifications.
All DWLR materials and combinations thereof shall be corrosion
proof.
maximum dimension ≤ 300
mm
material FRP, Delrin, stainless steel (AISI 316) or
equivalent
ingress protection IP65
operating temperature 0 to
60°C humidity 100%
4. Bubbler
pressure system maintenance free mini compressor with precise pressure/flow
regulation on dry Nitrogen gas cylinder.
maximum tube length ≥120 m
tube material Nylon, PTFE or equivalent, inner diameter ≥2 mm and ≤6
mm, wall thickness ≥1 mm
suspension wire stainless steel, Kevlar or equivalent to keep the bubble outlet at
the correct suspension depth
temperature coefficient <15 x 10
-6
/°C (longitudinal of suspension
wire)
tube length to be specified in m
as per Schedule of
Requirements
5. DRS software
The DRS software shall support functions for conversion of the collected data into ASCII
(text) tables, and for efficient visualisation of the time series in tabular and graphical form.
• Graphical axes shall be generated automatically and be manually adjustable. Units
along the axes shall not be awkward but intuitive and easily understandable.
• All axes shall have sufficient graduation.
• The labels along the time axis shall be in sensible time intervals, i.e. hh:mm for relatively
short periods and dates, e.g.: DD/MM/YYYY, for long periods. The same applies for the
level axis.
• The unit-labels shall not cover each other.
• To enhance readability, adequate gridlines, both along time and level axes, shall be
generated automatically by the graphics functions, approximately 5 gridlines per axis.
• The gridlines shall also be user adjustable.
• The user interface shall support efficient functions to select and visualise subsets of the
time series, e.g. a single day or several days somewhere out of many weeks of data.
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-5/7
6. Annexure-II/iii
• Efficient window functions shall be available to visualise the data in the required
resolution, i.e. the level scale shall be user adjustable.
• Software that can only display sample counts or total duration or does not support axis
and grid adjustment is not permitted.
• The DRS software shall support error free transfer of the retrieved data to a PC.
• Note that in particular, the graphics capabilities are a major reason to apply a palmtop
or Laptop computer as DRS..
6. PC Software
• PC software shall be part of the delivery and will be used in the office, e.g. on a desktop
PC.
• The PC software shall efficiently and reliably transfer the collected data from the DRS to
a PC environment.
• The PC software shall have functions for conversion of the collected data into ASCII
(text) tables.
• The PC software shall have functions for conversion of the collected data into ASCII
(text) files. The tabular data will be imported by other software packages, e.g. for
analysis and presentation in a spreadsheet and for storage in a database.
• The export file format is specified in Chapter 7.
• The PC software shall support the same and more tabular and graphical presentation
functions as specified under DRS software.
7. Standard DWLR text file format
The text file is the intermediate data representation that is used for loading of the data into
the hydrological data base system.
• The PC based software shall have a facility to generate a text file with waterlevel data in
the standardised format.
• The text file formatting function may be part of the standard proprietary PC software.
Alternatively, the function may be implemented in a separate, MS-Windows XP/Vista
based program.
• The text file facility shall be easy to use.
• Only SI-units shall be presented, i.e. m and °C for levels and temperature respectively.
• Non-SI units like feet, inches, °F are not permitted.
• The text file shall have a section with header lines.
• The header lines shall precede the data lines.
• The header lines shall contain instrument serial number, reference level that was used
to convert from pressure head in to water level, applied specific gravity.
• In case a software wave attenuation filter is implemented, the averaging number and the
sampling interval shall be presented in the header.
• The header may contain other data such as measuring range, station ID, installation
depth, top of casing reference relative to MSL, station co-ordinates and similar data.
• For each specific instrument make and model, the number of the header lines must be
fixed, i.e. all instruments of that make and model shall always generate the same
number of header lines, in the same format.
• The contents of the header lines is for use by the operator but will not be automatically
assessed by the Data Entry Software (SW/GW DES).
• All header lines shall be terminated by a <CR><LF> sequence.
• The data shall be organised in columns
• column 1: date in dd/mm/yyyy
Leading zero's shall be included, i.e. 06 February 2001 will be expressed as 06/02/2001.
The </> character may be omitted, then the format becomes ddmmyyyy.
• column 2: time in hh:mm:ss
Time shall be expressed in 24 hours. The AM/PM representation is not permitted.
Leading zero's shall be included, i.e. 6 o'clock in the morning shall be represented by
06:00:00.
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-6/7
7. Annexure-II/iii
The <:> character may be omitted, then the format becomes hhmmss.
• column 3: water level in metres with millimetre resolution, e.g. 49.640 m.
• column 4: in case temperature is measured then temperature shall be expressed in °C
with 0.1°C resolution, e.g. 32.8 °C.
• Alternative data sequences are not permitted.
• If a parameter can be negative, then a character position for the minus sign shall be
reserved.
• The column separator shall be one of the following: <space>, <tab>, <comma>, or
<semicolon>.
• Only one type of separator may be applied.
• End-of-line is indicated by <CR><LF> sequence.
• All data lines shall comply with this column format, empty lines or intermediate partly
filled lines, e.g. with date and/or time only, are not permitted.
• All columns shall be complete, i.e. each field in a column shall always contain data. If no
temperature data are measured, then column 4 may be omitted.
• Erroneous or missing water level data shall be indicated by -99.999.
• Erroneous or missing temperature data shall be indicated by -99.9.
Examples of data
lines:
30/05/199
8
11:00:0
0
9.87
5
28.
730/05/199
8
12:00:0
0
-
99.999
28.
730/05/199
8
13:00:0
0
9.98
9
-
99.30/05/199
8
14:00:0
0
10.38
0
28.
8
30/05/199 15:00:0 10.80 28.
The four columns contain date, time, water level and temperature data respectively.
Accessories
• bubbler outlet
• tools and spares
• signal, power and communication cables as required for all normal user operations
• 220 VAC ±25%, 47 to 53 Hz, charger for NiCd, NiMH or Li-ion battery pack
Consumables
• batteries
• desiccator for the hydrophobic filter and electronics
• replacement hydrophobic filters for air-inlet (if applicable)
Equipment Specification: DWLR, BUBBLER TYPE(SW) Version 3 10.045-7/7