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E-HELP: Replacing Temperature Transmitters With Changing Power Sources

E-HELP: Replacing Temperature Transmitters With Changing Power Sources
Q: I want to replace a THZ Temperature Transmitter (Model THZ/PRG/4-20MA/12-42DC [DIN]) with a CPT PC-Programmable Temperature Transmitter (Model CPT/TPRG/0-20MA/117AC/-C-RF [DIN]). The THZ unit we are replacing gets its power from the 4-20mA current loop while the CPT unit is going to be powered by 120Vac. Does the CPT need to be specified as "source" or "sink" to work as a drop-in replacement for the THZ unit?
Published: October 30, 2015

Avoid Measurement Errors with Sensor Drift Detection

Avoid Measurement Errors with Sensor Drift Detection
Sensor drift is a common problem that can lead to inaccurate temperature measurement readings. It can be caused by several factors including environmental contamination, vibration or extreme temperature fluctuations. Because this drift causes the measurement error to get worse over time, it’s not possible to calibrate out the error. Traditionally, reducing inaccurate measurements caused by sensor drift has meant undertaking a regular and time-consuming preventative maintenance calibration program.
Published: September 21, 2015
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