rosemount 3144 Temp transmitter question
rosemount 3144 Temp transmitter question
(OP)
I have a 3144P, 0-150deg F, 4-20ma output. Using a test device to simulate RTD input to the transmitter, I have 0F and 4ma output and at 150F i have 20ma output and it is read correctly on my PLC. This is all good, the problem lies with this, when I put a calibrated temp probe in the thermowell next to the transmitter to verify the temp my test probe reads 1.2 degrees more than the transmitter. I need to calibrate the transmitter or adjust the transmitter to read the correct temperature as the test probe, within .5 degrees. I have not done this in a while so am rusty at this, need a refresher. Is the RTD bad?
Thanks.
Thanks.





RE: rosemount 3144 Temp transmitter question
known temperature source.
pg 60, Rosemount 3144P Temperature Transmitter manual
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Navigation sensor trim is 1 > 2 > 2 > 1 > 1 according to the menu structure:
RE: rosemount 3144 Temp transmitter question
RE: rosemount 3144 Temp transmitter question
RE: rosemount 3144 Temp transmitter question
If the rtd is the right animal (and such a small difference suggests it is) you should consider what is different between the reference instrument and this transmitter: length/diameter of t-well vs length/diameter of probe, use of heat paste and then put both of them in ice water and boiling water and use this reference to calibrate the sensor. RTD's usually read very accurately or not at all. I would be looking for installation issues here.
RE: rosemount 3144 Temp transmitter question