A consolidated description of ten recent innovations in RTD signal conditioning for industrial process measurement and control. Items include incorporation of ASIC processors, improved calibration, and more.
Orion Instruments Jupiter Magnetostrictive Level TransmitterMiller Energy, Inc.
The Jupiter JM4 Magnetostrictive level transmitter from Orion Instruments is the newest and most advanced level instrument to date. The JM4 is available as a direct insertion option, as well as an external mount on any Orion magnetic level indicator (MLI) or modular instrumentation bridle. With an improved design, unparalleled performance, and a collection of new and innovative features, the JM4 provides safer, simpler, and smarter measurement in total and interface level applications.
Cameron's CamCor™ PRO Series Coriolis flow meter features high-accuracy, shallow bow-shaped dual sensor tubes and is ideal for oilfield production applications. This industrial process-grade Coriolis flow meter offers high performance for accuracy, repeatability, wide flow range, low pressure loss, and safe design.
FLUXUS® measures flow non-intrusively using ultrasonic technology. The ultrasonic transducers are simply clamped on to the outside of the pipe and are never in contact with the liquid – pipe work is not necessary.
Clamp-on technology provides for maximum flexibility and the sophisticated electronics of FLUXUS® ensure the highest
possible accuracy and reliability. The measuring system, consisting of the transmitter, the transducers and the VARIOFIX mounting fixture, can be configured to meet individual requirements.
The FLUXUS® flowmeter series includes a variety of transmitters
and transducers: from basic models for standard applications up to robust measurement solutions for offshore use or for hazardous areas.
Katalog fluke-oscilloscope-the-toughest-scopes-ever-built-by-tridinamika,
jual fluke oscilloscope, harga, beli, info, spesifikasi dan review
untuk informasi lebih lanjut kunjungi
www.tridinamika.com
untuk pemesanan dan pertanyaan hubungi via email
sales@tridinamika.com
Rotork RI Wireless is a revolutionary concept for wireless valve monitoring and diagnostics in the process industry. The field proven solution transmits real-time position indication to the control room and enables predictive maintenance for actuated valves, delivering capital and operating expenditure reduction, increased safety and increased productivity.
Orion Instruments Jupiter Magnetostrictive Level TransmitterMiller Energy, Inc.
The Jupiter JM4 Magnetostrictive level transmitter from Orion Instruments is the newest and most advanced level instrument to date. The JM4 is available as a direct insertion option, as well as an external mount on any Orion magnetic level indicator (MLI) or modular instrumentation bridle. With an improved design, unparalleled performance, and a collection of new and innovative features, the JM4 provides safer, simpler, and smarter measurement in total and interface level applications.
Cameron's CamCor™ PRO Series Coriolis flow meter features high-accuracy, shallow bow-shaped dual sensor tubes and is ideal for oilfield production applications. This industrial process-grade Coriolis flow meter offers high performance for accuracy, repeatability, wide flow range, low pressure loss, and safe design.
FLUXUS® measures flow non-intrusively using ultrasonic technology. The ultrasonic transducers are simply clamped on to the outside of the pipe and are never in contact with the liquid – pipe work is not necessary.
Clamp-on technology provides for maximum flexibility and the sophisticated electronics of FLUXUS® ensure the highest
possible accuracy and reliability. The measuring system, consisting of the transmitter, the transducers and the VARIOFIX mounting fixture, can be configured to meet individual requirements.
The FLUXUS® flowmeter series includes a variety of transmitters
and transducers: from basic models for standard applications up to robust measurement solutions for offshore use or for hazardous areas.
Katalog fluke-oscilloscope-the-toughest-scopes-ever-built-by-tridinamika,
jual fluke oscilloscope, harga, beli, info, spesifikasi dan review
untuk informasi lebih lanjut kunjungi
www.tridinamika.com
untuk pemesanan dan pertanyaan hubungi via email
sales@tridinamika.com
Rotork RI Wireless is a revolutionary concept for wireless valve monitoring and diagnostics in the process industry. The field proven solution transmits real-time position indication to the control room and enables predictive maintenance for actuated valves, delivering capital and operating expenditure reduction, increased safety and increased productivity.
Brosur Fluke 5320A. Hubungi PT. Siwali Swantika 021-45850618PT. Siwali Swantika
Brosur Fluke Multifunction Electrical Tester Calibrator. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
Magnetic flow meter for industrial process measurementCTi Controltech
Enhanced signal conditioning circuitry provides excellent noise and spike immunity
High stable and repeatable output with ±0.5% of rate accuracy
Minimum process fluid conductivity requirement of 10μS/cm provides maximum applicability
Electrode Status Diagnostic function diagnoses empty pipe condition or electrode scaling
Available in wafer of flanged designs
Both Integral and Remote configurations are available for maximum flexibility
Datasheet Fluke Infrared Windows. Datasheet Fluke ClirVu Series. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
The Aquatrak Sensor calculates the true average level even in the presence of waves and surging liquid surfaces. The Sensor can be configured via its communication ports for virtually any site-unique conditions.
Datasheet Fluke 5080A. Hubungi PT. Siwali Swantika 021-45850618PT. Siwali Swantika
Datasheet Fluke Multi-Product Calibrator. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
Transcat + Emerson Webinar: Maximize Safety and Reliability with the Only Wir...Transcat
Join us as Transcat and Kevin Thomas, Emerson's Level Instrumentation Expert, host this informative webinar. In this webinar you will learn about: overfill prevention, how to be alerted to issues such as coating or corrosion, how to monitor and control using the 2140 series Level Detectors, and how to detect sand & sediment with these level detectors.
Shop Rosemount Products: http://www.transcat.com/brand/rosemount?cat=3
Digital valve positioner for industrial process control valvesCTi Controltech
The Flowserve Logix 3200 Digital HART® positioner utilizes state-of-the-art piezo technology to provide superior performance and reliability. The Logix 3200 can be easily configured using the local buttons, HART handheld, and SoftTools software.
Local status LED's
Local DIP Switches/Calibration Buttons
Auto Tuning with dynamic gain selection
Utilizes HART 5
Simple calibration via local interface
The ILT-6000 contains a low profile waveguide that is inserted into a waveguide sleeve isolation well and float assembly. The waveguide sleeve isolates the internal waveguide from the process environment and protects it from excessive process conditions. This provides an additional safety barrier for the operator. The major benefit is the transmitter and waveguide can be removed for field checking without interruption or exposure to the process environment
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.
NIVELCO EasyTREK SP-500 Ultrasonic Level Transmitters for LiquidsArjay Automation
The newest generation EasyTREK SP-500 series level transmitters are based on NIVELCO’s 35 years of experience with ultrasonic level measurement. The IP68 rated units have their transducer and processing electronics incorporated in one single housing. The new EasyTREK transmitters utilize HART® 7 communication so they can be used in multidrop systems connected to MultiCONT process controller/display, or to a PC with the help of the UNICOMM HART®-USB modem or similar. The transmitters can be remotely programmed also with Handheld Field Communicator, and can be connected wirelessly to a PC with the SAT-504 Bluetooth® HART® modem.
The design of a signal conditioning & acquisition elements of a chopped b...eSAT Journals
Abstract This paper presents the design of signal conditioning and acquisition elements of a chopped broadband radiation pyrometer. This instrument is capable of measuring temperature between 900oC and 1200oC. This work aims at solving the problem of measuring hot objects with a thermometer. The radiation pyrometer is a non-contact temperature sensor that infers the temperature of an object by detecting its naturally emitted thermal radiation. It collects the visible and infrared energy and focuses it on a detector. The detector used in this device is a thermal sensor. It receives heat energy reflected from a mirror inclined at 45o to the incident signal from the hot object. The design achieved the following: temperature range measured, from 900℃ to 1200℃; the calibrated instrument is fairly linear with a tolerable non-linearity of 3.6%, with the sensitivity of 0.014푉℃−1; the resolution was quite very small as such it can easily detect the slightest change at its input; the rotating shutter was configured to supply the chopped signal; it operates at a frequency of 50Hz that is lower than the system frequency of 200Hz; the data acquisition system was able to capture data at a periodic time of 0.02 second and below, the system operates within the specified sampling range thus, satisfying Nyquist criteria. The signal so received by the detector is translated to a human readable form and sent to a display. Keywords:- Broadband Radiation Pyrometer, Temperature Sensor, Instrument, Chopped and Detector.
This p.p.t consists knowledge about basic of DAS.
It's elements,detailed information about DAS.
Information about Analog data acqusition system.
types of DAS.
Sample/Hold ckt.
PC based DAS. ETC
Brosur Fluke 5320A. Hubungi PT. Siwali Swantika 021-45850618PT. Siwali Swantika
Brosur Fluke Multifunction Electrical Tester Calibrator. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
Magnetic flow meter for industrial process measurementCTi Controltech
Enhanced signal conditioning circuitry provides excellent noise and spike immunity
High stable and repeatable output with ±0.5% of rate accuracy
Minimum process fluid conductivity requirement of 10μS/cm provides maximum applicability
Electrode Status Diagnostic function diagnoses empty pipe condition or electrode scaling
Available in wafer of flanged designs
Both Integral and Remote configurations are available for maximum flexibility
Datasheet Fluke Infrared Windows. Datasheet Fluke ClirVu Series. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
The Aquatrak Sensor calculates the true average level even in the presence of waves and surging liquid surfaces. The Sensor can be configured via its communication ports for virtually any site-unique conditions.
Datasheet Fluke 5080A. Hubungi PT. Siwali Swantika 021-45850618PT. Siwali Swantika
Datasheet Fluke Multi-Product Calibrator. Informasi lebih detail hubungi PT. Siwali Swantika, Jakarta Office : 021-45850618 atau Surabaya Office : 031-8421264
Transcat + Emerson Webinar: Maximize Safety and Reliability with the Only Wir...Transcat
Join us as Transcat and Kevin Thomas, Emerson's Level Instrumentation Expert, host this informative webinar. In this webinar you will learn about: overfill prevention, how to be alerted to issues such as coating or corrosion, how to monitor and control using the 2140 series Level Detectors, and how to detect sand & sediment with these level detectors.
Shop Rosemount Products: http://www.transcat.com/brand/rosemount?cat=3
Digital valve positioner for industrial process control valvesCTi Controltech
The Flowserve Logix 3200 Digital HART® positioner utilizes state-of-the-art piezo technology to provide superior performance and reliability. The Logix 3200 can be easily configured using the local buttons, HART handheld, and SoftTools software.
Local status LED's
Local DIP Switches/Calibration Buttons
Auto Tuning with dynamic gain selection
Utilizes HART 5
Simple calibration via local interface
The ILT-6000 contains a low profile waveguide that is inserted into a waveguide sleeve isolation well and float assembly. The waveguide sleeve isolates the internal waveguide from the process environment and protects it from excessive process conditions. This provides an additional safety barrier for the operator. The major benefit is the transmitter and waveguide can be removed for field checking without interruption or exposure to the process environment
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.
NIVELCO EasyTREK SP-500 Ultrasonic Level Transmitters for LiquidsArjay Automation
The newest generation EasyTREK SP-500 series level transmitters are based on NIVELCO’s 35 years of experience with ultrasonic level measurement. The IP68 rated units have their transducer and processing electronics incorporated in one single housing. The new EasyTREK transmitters utilize HART® 7 communication so they can be used in multidrop systems connected to MultiCONT process controller/display, or to a PC with the help of the UNICOMM HART®-USB modem or similar. The transmitters can be remotely programmed also with Handheld Field Communicator, and can be connected wirelessly to a PC with the SAT-504 Bluetooth® HART® modem.
The design of a signal conditioning & acquisition elements of a chopped b...eSAT Journals
Abstract This paper presents the design of signal conditioning and acquisition elements of a chopped broadband radiation pyrometer. This instrument is capable of measuring temperature between 900oC and 1200oC. This work aims at solving the problem of measuring hot objects with a thermometer. The radiation pyrometer is a non-contact temperature sensor that infers the temperature of an object by detecting its naturally emitted thermal radiation. It collects the visible and infrared energy and focuses it on a detector. The detector used in this device is a thermal sensor. It receives heat energy reflected from a mirror inclined at 45o to the incident signal from the hot object. The design achieved the following: temperature range measured, from 900℃ to 1200℃; the calibrated instrument is fairly linear with a tolerable non-linearity of 3.6%, with the sensitivity of 0.014푉℃−1; the resolution was quite very small as such it can easily detect the slightest change at its input; the rotating shutter was configured to supply the chopped signal; it operates at a frequency of 50Hz that is lower than the system frequency of 200Hz; the data acquisition system was able to capture data at a periodic time of 0.02 second and below, the system operates within the specified sampling range thus, satisfying Nyquist criteria. The signal so received by the detector is translated to a human readable form and sent to a display. Keywords:- Broadband Radiation Pyrometer, Temperature Sensor, Instrument, Chopped and Detector.
This p.p.t consists knowledge about basic of DAS.
It's elements,detailed information about DAS.
Information about Analog data acqusition system.
types of DAS.
Sample/Hold ckt.
PC based DAS. ETC
Signal conditoning
Bab ini akan membantu Anda memahami mengapa pengkondisian sinyal yang diperlukan dalam proses kontrol dan untuk membiasakan Anda dengan metode pengkondisian sinyal.
Berikut akan dibahas dalam bab ini:
• Konversi sinyal sensor menjadi sinyal listrik atau pneumatik
• Sinyal Linearisasi, metode pengaturan level sinyal nol, dan rentang
• Nonlinear analog amplifier
• digital Linearisasi
• Perbedaan antara sensor, transduser, dan konverter
• Conditioning untuk menampilkan lokal dan transmisi
• Suhu kompensasi digunakan dalam pengkondisian sinyal
• Pengkondisian sinyal digunakan dengan efek Hall dan elemen magneto resistif
(MRE) perangkat
• Pertimbangan menggunakan perangkat kapasitif
• Ketahanan suhu detektor (RTD) pengkondisian sinyal
One of my friend has given a best information regarding DAS (data acquisition system) through this slides/ presentation.
This contains the information about various components of DAS.
Enjoy it,like it.
Signal conditioning & condition monitoring using LabView by Prof. shakeb ahm...mayank agarwal
Lecture handout given by Prof. shakeb ahmad khan on Signal conditioning & condition monitoring using LabView in National Workshop on LabVIEW and its Applications.Organized at Dayalbagh Educational Institute,Dayalbagh,AGRA from 28-29 August 2015.
Data Acquisition System
Topics:Need of Data Acquisition System, DAQ Module, Sensors, Signal conditioning, DAQ hardware, DAQ software, DAQ processors, Advantages & Disadvantages.
Introduction to DAS
Objectives of a DAS
Block diagram and explanation
Methodology
Hardware and software for DAS
Merits and Demerits of DAS/DQS
Conclusion
Prepaid energy meter using GSM is used to record consumed units and send an alert to user via GSM. It is used to reduce power theft in commercial areas.
Quickly design infrared body temperature detectorVinsion Chan
Body temperature testing is necessary monitoring in our homes, in and out of the community or workplace, and during travel. Infrared body temperature detector helps reduce contact infection through non-contact temperature measurement. Here we come to talk to you about this system and the main design plan.
Analog-to-Digital Converter (ADC) is an integral part of high-speed signal processing applications. This paper discusses about 10-bit SAR based ADC that enables very low power consumption and sampling rate as high as 165 MSPS.
Wireless energy meter monitoring with automated tariff calculationUdayalakshmi JK
Electricity billing has become a difficult task. The board has to make regular visit to the consumers house to make the reading. Also it can cause manual error. Now here we are monitoring the energy meter with modern techniques. The total energy consumed by the consumer and the consumption cost is known to the consumer and to the board by means of a hand held device.
SCADA for remote industrial plant project is used to process the real time data acquisition under supervisory control for large scale remote industries.
Low Power Reconfigurable ASICs for Wearable Technology AppsTriad Semiconductor
Wearable Technology applications are by definition portable, battery powered and very concerned about power consumption, analog performance and cost. Triad Semiconductor makes Reconfigurable Mixed Signal ASICs ( rASIC (tm) ) that help wearable tech companies get products to market quickly and inexpensively. This presentation shows the ultra low power and precision analog performance that can be crafted in a Triad rASIC.
A to D Convertors
work to convert analog (continuous, infinitely variable) signals to digital (discrete-time, discrete-amplitude) signals. In more practical terms, an ADC converts an analog input, such as a microphone collecting sound, into a digital signal.
One of the leading branches of engineering, Instrumentation engineering deals in mechanics and operation of measuring instruments. This type of engineering has a major role in the industries which have automated processes. For example, chemical and manufacturing industries. The role of engineers in this field is to ensure stability, reliability, safety, and enhanced productivity.
Instrumentation engineering covers various topics and subjects from other branches of engineering, which makes it a different course in the field of engineering. Students who prefer to study diverse subjects should opt for this branch of engineering. Ekeeda offers Online Instrumentation Engineering Courses for all the Subjects as per the Syllabus.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
2. Tel: 248-295-0880 • Fax: 248-624-1541 • sales@acromag.com • www.acromag.com
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1. Easy Configuration and Calibration Using a PC’s USB Interface.
Simple USB digital configuration and calibration is made possible by new RTD
transmitters that incorporate an ASIC. This design eliminates the need for zero/span pots, jumpers,
DIP switches, or pushbuttons. The PC interface is easy, calibration is faster, and transmitter
performance is improved. Users select functional parameters from Windows-based configuration
software, and the settings download via USB into non-volatile EEPROM memory to control the
transmitter’s operation. Setup is reduced to clicking the input type input wiring, sensor alpha
coefficient, and sensor fault detection settings then entering the input/output range values on an
intuitive configuration screen.
2. Analog Amplifier Enhanced with Digital Calibration
ASIC-based RTD transmitters have an input signal that is not digitized. There are no
microcontrollers in the I/O signal path and no embedded firmware requirements for signal
processing. Instead, an analog signal path is maintained for the highest accuracy and
performance. The first benefit is that measurements are continuous and have no steps or update
time delays in the output signal, unlike digital designs. Second, ASIC-based transmitters deliver
the reliability of an analog design with the flexibility, convenience and stability of a digital design.
The fully analog ASICs are also more immune to high electromagnetic interference for increased
reliability in critical applications.
3. ImprovedTemperature MeasurementThrough Simultaneous Differential Sampling
Simultaneous differential sampling eliminates small measurement errors from digital multiplexer sampling of
sensor wires at different points in time.An ASIC samples all sensor wires at the same time and measures
the analog input signal continually across the entire signal to produce an accurate differential measurement.
Advanced auto-zero circuit techniques disregard anomalous data points and accuracy improves.
4. Superior Lead-wire Compensation
A third wire is often used to compensate for resistance differences in the sensor’s lead wires.
However, traditional RTD measurement circuits typically require all three sensor wires to be the
same length, gauge, and ohmic impedance for best results. Any impedance differences in a
3-wire measurement produce a small, “static” error unless calibrated out. ASICs, on the other
hand, can measure and reject the third wire’s resistance so their length and gauge are not factors.
This design adds flexibility when installing a transmitter with a 3-wire input configuration. The RTD
measurement accuracy improves and reduces recalibration requirements for systems with long
lead wires.
3. Tel: 248-295-0880 • Fax: 248-624-1541 • sales@acromag.com • www.acromag.com
5. Reduced Sensitivity to Ambient Temperature Changes
The ambient (surrounding) operating temperature range for industrial-grade RTD transmitters
is typically –40 to 80oC. ASIC technology offers higher performance across a wider ambient
temperature range making ASIC RTD transmitters well-suited to harsh environments. An ASIC
that has a programmable gain amplifier (PGA) with an auto-zeroing internal frequency to offset
temperature drift can achieve drift values as low as 5 ppm/oC. By comparison, digital RTD
transmitters drift around 50 ppm/oC for ambient temperature changes. So for applications that
must endure variable ambient temperatures, there are now commercially available solutions
selling for under $100 that approach military-grade drift specifications.
6. User-Programmable Over/Under Range Values
Typical analog 2-wire transmitters have a 4-20mA output signal which is difficult to control beyond
the endpoints. But, an ASIC can support configuration of output ranges with specific over/under
range levels and different sensor fault/alarm limit levels. This feature enables identification of
differences between a “runaway” process temperature and a sensor fault condition. For example,
the output signal could be set to allow a level up to three percent above/below the expected range.
However, a broken lead wire would send the output signal further beyond these over/under-range
levels. Controller devices could then react to these different circumstances appropriately.
7. User-Configurable Failsafe Modes
In the event of a measurement fault, the configured failsafe mode drives the output signal either “upscale” or
“downscale”. The ASIC can produce an output level that is 1mA above the normal over-range value (upscale)
or 0.4mA below the normal under-range value (downscale).The control system can then set an alarm condition
trip point based on these signal levels. Such programmability helps ensure safe, predictable execution of
alarm or shutdown operations in critical applications. ASIC technology is also Namur-compliant, meeting the
specification’s linear output range and failure limit requirements.
8. Better Linearization
New RTD measurement techniques employ a unique, low noise, voltage‐to‐current conversion
scheme that rivals 12‐bit performance. ASIC technology goes even further to digitize the signal
by using an integrated digital‐to‐analog converter. In so doing, zero offset is adjusted, excitation
currents are controlled, and a linearization correction of 40:1 is applied to the input. This
innovation along with a programmable gain amplifier yields even more accurate temperature
measurements. Because the temperature measurement technology is analog, users can calibrate
the amplifier for unique narrow ranges without sacrificing resolution. Exceptional accuracy
(±0.05%) is achieved over ranges within 250°C. In contrast, digital RTD transmitters require
expensive circuitry to handle multiple, pre-set ranges so accuracy does not degrade on narrow
ranges.
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4. Tel: 248-295-0880 • Fax: 248-624-1541 • sales@acromag.com • www.acromag.com
9. Faster Response Times for Tighter Control
RTD sensors are seldom used when a fast response is required because of the “thermal lag” time
to heat up and show a resistance change. RTD transmitters can also have a slower response
time due to added filtering for noise immunity. However, ASIC‐based RTD transmitters have
response times of less than one millisecond compared to 20 to 1200 milliseconds for traditional
RTD transmitters. In applications where thermocouples were once the only solution, quick‐
response ASIC RTD transmitters can now work with faster, low thermal mass RTD sensors. Faster
measurements enable more detailed temperature profiles, tighter temperature control, and reduce
the time to shut down a “runaway” process.
10. Higher Reliability
ASIC RTD transmitters have fewer parts than conventional analog or digital transmitters. Fewer
parts translate to a lower failure probability and higher reliability. ASIC‐based RTD transmitters
can have as few as three major parts—the ASIC IC, EEPROM memory, and a USB‐to‐serial
converter.
So there they are—the Top 10 advances in RTD signal conditioners. Acromag’s ST131
& TT231 ASIC‐based transmitters feature many of these advances. They have a USB
interface for easy PC configuration and the compact, DIN Form B connection head is well‐
suited for thermo‐well or rail‐mount applications.
ABOUT ACROMAG
Acromag has designed and manufactured measurement and control products for more than 50 years. They
are an AS9100 and ISO 9001-certified international corporation with a world headquarters near Detroit,
Michigan and a global network of sales representatives and distributors. Acromag offers a complete line
of industrial I/O products including a variety of process instruments, signal conditioners, and distributed
fieldbus I/O modules that are available with a 2-year warranty. Industries served include chemical
processing, manufacturing, defense, energy, and water services.
For more information about Acromag products, call the Inside Sales Department at
(248) 295-0880, FAX (248) 624-9234. E-mail sales@acromag.com or write
Acromag at 30765 South Wixom Road, Wixom, MI 48393 USA.
The web site is www.acromag.com.
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