- The bi-weekly report summarizes maintenance and troubleshooting tasks completed by an electrical engineer from October 17-31. Key tasks included replacing an HMI panel and troubleshooting issues with a wrapper machine, pallet stacker, aggregate bin scales, color machine load cell, pallet transfer cart photo eyes, and a cuber. Future projects are also outlined, such as adjusting paver heights and installing cable infrastructure upgrades.
A list of Flash cards featuring idioms of time and their usage. Idioms as best learned by using them to make sentence. Reading idioms is more of a habit one must develop to improve communication in the long run
A quiz buzzer designed for 12 teams or less with push switches and beacons using a Microcontroller.
Partner: Swastik Technologies- Chennai.
Client: Muscat Codex - Oman.
Last Rev. August 2014 Calibration and Temperature Measurement.docxsmile790243
Last Rev.: August 2014 Calibration and Temperature Measurement Page 2
ME 495—Thermo Fluids Laboratory
~~~~~~~~~~~~~~
Temperature Measurement and First-
Order Dynamic Response
~~~~~~~~~~~~~~
PREPARED BY: GROUP LEADER’S NAME
LAB PARTNERS: NAME
NAME
NAME
TIME/DATE OF EXPERIMENT: TIME , DATE
~~~~~~~~~~~~~~
OBJECTIVE — The objectives of this laboratory are:
• To learn basic concepts and definitions associated with the
temperature and temperature measurements.
• To learn how to calibrate a Thermocouple and a Thermistor.
• To determine and compare the time constants of a
thermocouple and a thermometer.
• To determine how a thermocouple and a thermometer
responds to different inputs. You will also observe the
response of a thermocouple to an oscillatory input.
• To develop awareness for sources of error in temperature
measurements.
THEORY – In this lab, we will use first-order models to
approximate the response of a thermometer, thermocouple, and a
thermistor to temperature inputs, as these temperature sensors
measure temperatures in a different way.
A thermometer senses a change in temperature as a change in
the density of a fluid.
A thermocouple consists of two wires of different metals
joined at one end (the junction). When a voltage is applied
across the free ends of the two wires, the differing properties
of the wires create an induced voltage that it proportional to
the temperature change at the junction.
A thermistor is a type of resistor whose resistance is
dependent on temperature, more so than in standard resistors.
The change in resistance is linear with respect to change in
temperature, thus making a thermistor an accurate
temperature measuring device.
EXPERIMENT PREPARATION - Get a thermometer, a K (or J)
type thermocouple, and a thermistor from the TA. Identify the
positive and negative terminals for the thermocouple.
• Verify that the thermocouple is functioning well. This can be
done by connecting the thermocouple to a DMM and ensuring that
the voltage changes when you hold the thermocouple weld
between your fingers.
• Be familiar with all of the instruments you will be using for this
experiment. Knowing your equipment well is essential.
• Prepare an ice bath. Most EMF (electromotive force) tables use
ice point (0C) as the reference temperature and this traditional
fixed point temperature is preferred for accurate and reliable
measurements. To prepare the ice bath:
o Crush or flake the ice (Ice is available in the white icebox
located on the measurement table).
o Fill the thermos (the blue with white lid) half with crushed-ice,
add water and stir it until the mixture becomes a slush without
having the ice float. [Recall: If the ice floats, the bottom
temperature could be higher than 0C –Anomalous expansion of
water.]
PROCEDURE - Part 1: Modify a VI for temperature measurements
In this lab, you will b ...
Science fair project called Thermocharger. An innovative handheld charger that uses the temperature difference between the heat of a hand and ambient temperature to charge a cellular device.
A list of Flash cards featuring idioms of time and their usage. Idioms as best learned by using them to make sentence. Reading idioms is more of a habit one must develop to improve communication in the long run
A quiz buzzer designed for 12 teams or less with push switches and beacons using a Microcontroller.
Partner: Swastik Technologies- Chennai.
Client: Muscat Codex - Oman.
Last Rev. August 2014 Calibration and Temperature Measurement.docxsmile790243
Last Rev.: August 2014 Calibration and Temperature Measurement Page 2
ME 495—Thermo Fluids Laboratory
~~~~~~~~~~~~~~
Temperature Measurement and First-
Order Dynamic Response
~~~~~~~~~~~~~~
PREPARED BY: GROUP LEADER’S NAME
LAB PARTNERS: NAME
NAME
NAME
TIME/DATE OF EXPERIMENT: TIME , DATE
~~~~~~~~~~~~~~
OBJECTIVE — The objectives of this laboratory are:
• To learn basic concepts and definitions associated with the
temperature and temperature measurements.
• To learn how to calibrate a Thermocouple and a Thermistor.
• To determine and compare the time constants of a
thermocouple and a thermometer.
• To determine how a thermocouple and a thermometer
responds to different inputs. You will also observe the
response of a thermocouple to an oscillatory input.
• To develop awareness for sources of error in temperature
measurements.
THEORY – In this lab, we will use first-order models to
approximate the response of a thermometer, thermocouple, and a
thermistor to temperature inputs, as these temperature sensors
measure temperatures in a different way.
A thermometer senses a change in temperature as a change in
the density of a fluid.
A thermocouple consists of two wires of different metals
joined at one end (the junction). When a voltage is applied
across the free ends of the two wires, the differing properties
of the wires create an induced voltage that it proportional to
the temperature change at the junction.
A thermistor is a type of resistor whose resistance is
dependent on temperature, more so than in standard resistors.
The change in resistance is linear with respect to change in
temperature, thus making a thermistor an accurate
temperature measuring device.
EXPERIMENT PREPARATION - Get a thermometer, a K (or J)
type thermocouple, and a thermistor from the TA. Identify the
positive and negative terminals for the thermocouple.
• Verify that the thermocouple is functioning well. This can be
done by connecting the thermocouple to a DMM and ensuring that
the voltage changes when you hold the thermocouple weld
between your fingers.
• Be familiar with all of the instruments you will be using for this
experiment. Knowing your equipment well is essential.
• Prepare an ice bath. Most EMF (electromotive force) tables use
ice point (0C) as the reference temperature and this traditional
fixed point temperature is preferred for accurate and reliable
measurements. To prepare the ice bath:
o Crush or flake the ice (Ice is available in the white icebox
located on the measurement table).
o Fill the thermos (the blue with white lid) half with crushed-ice,
add water and stir it until the mixture becomes a slush without
having the ice float. [Recall: If the ice floats, the bottom
temperature could be higher than 0C –Anomalous expansion of
water.]
PROCEDURE - Part 1: Modify a VI for temperature measurements
In this lab, you will b ...
Science fair project called Thermocharger. An innovative handheld charger that uses the temperature difference between the heat of a hand and ambient temperature to charge a cellular device.
2. CONTENTS:
1. Maintenance and troubleshooting
a. Replacing new HMI panel in the batch machine of the block plant.
b. Troubleshooting the wrapper machine of the block plant.
c. Troubleshooting the pallet stacker
d. Obtaining proper scaled value in the aggregate bins.
e. Replacing the Load cell on the color machine.
f. Replacing broken safety photo eyes on the pallet transfer cart.
g. Troubleshooting Cuber malfunction.
2. Future Projects
a. Height adjustment for pavers on wet side.
b. Installing cable ladder and cable tray system on the paver plant.
c. Rewiring the Cuber UP/ down control wires.
d. Adjustment of the height sensor on the Hopper 1.
3. A.Replacing new HMI panel in the batch machine of the
block plant.
Cause of the Problem:
No power at the panel.
Possible loss of the program.
Setup not running.
Not able to automatically add color as panel was down.
Troubleshooting:
The power was restored.
It was rebooted and the setup was run.
The setup was not able to run as the program was cleared.
Therefore new panels were ordered and installed.
B. Troubleshooting the wrapper machine of the block plant.
Cause of the Problem:
Conveyor does not start.
Blocks not able to pass forward.
NO power in the SLC power card.
Delay in production cycle.
Troubleshooting:
A broken fuse was found and was replaced.
The SLC power card was reinstalled and a new was ordered.
The SLC processor was reinstalled with the Current program and rebooted.
The conveyor started running.
However wrapper is still waiting on a part after which it could be used in the process.
4. C.Troubleshooting the pallet stacker
Cause of the Problem:
Pallet stacker shows unusual behavior.
Sometimes it just comes down with just 2 or three boards.
Troubleshooting:
The sensor in the middle which is responsible for the number of boards was loose.
Repositioned the sensor.
Adjusted the sensor for the number of boards.
Pallet stacker working fine
D. Obtaining proper scaled value in the aggregate bins.
Cause of the Problem:
Desired Agg bin weight was different than the value obtained.
Caused differences in the product made.
Troubleshooting:
The small jog and the large jog values were altered with the help of Mr. Joe.
Difference in the jog time was also altered.
The exact value was obtained and noted down.
E.Replacing the Load cell on the color machine.
Cause of the Problem:
The weight of color in the color panel was showing as constant.
There was no difference with any color.
Resetting the color program had no effect either.
5. Troubleshooting:
Any loose wire connection was found out. All wires were intact.
The Load cell had no control voltage between the green and the black wires.
The load cell had incoming voltage to it.
This confirmed that the load cell was bad.
The load cell was replaced and was calibrated through the software.
F. Replacing broken safety photo eyes on the pallet transfer cart.
Cause of the Problem:
Broken photo eye
The transfer car sometimes stops in between.
Connection problem with the receiver.
Troubleshooting:
Both the Transmitter and the receiver was replaced and a new set was ordered.
They were aligned to get the maximum signal.
They were all fitted and started with operation.
6. G. Troubleshooting Cuber malfunction.
Cause of the Problem:
Cuber not going up and down.
Manual/ auto operation cannot perform.
Delay in dry side production.
Troubleshooting:
A loose wire was found which was tied up together.
Eventually the fuse had also blown which was also replaced.
The wire is very tight so did come off twice.
New wires are ordered and will be rewired by Wednesday.