114 Final Exam Flashcards
(19 cards)
What is the most common material for RTD’s
Platinum
What are thermocouples made of?
Two dissimilar metals
What are three methods for DP cell level measurement?
A bubbler, wet leg, and dry leg
What should an RTD read at 0 degrees C
100 ohms
What is the most common electrical signal?
4-20mA
What does a multimeter measure?
Voltage, Resistance, and current
What does a HART communicator do?
It monitors and configures smart transmitters
Where can HART communicators be connected to a smart transmitter?
anywhere in the current loop
What does an RTD measure?
Temperature
What should be considered when picking a test gauge?
Operating range
What makes test gauges different from normal gauges?
Test gauges are calibrated to a higher standard
What is used to calibrate low pressure devices?
Manometers
What is used to calibrate pressure devices?
Deadweight testers
How many points should be tested during calibration?
5
What are the two axis labels on a calibration chart?
Tested Device and Calibration Standard
What should the chart look like for a properly calibrated gauge?
A 45 degree line
How many wires does an RTD have?
3, 2 red and 1 white
What does RTD stand for?
Resistive Thermal Device
How many wires does a thermocouple have?
2 wires
