Hello and thank you to all of you who volunteer your time to help others.
I have a question about 100 Ohm Platinum RTDs.
Using this with an Allen Bradley 1771-IR series C It appears that when the temperature drops to sub zero the readings are not accurate. I see mercury and thermister thermometers reading -6 for example but the RTD reading +2
I checked the accuracy of the RTD with a glass of crushed ice when I installed it - it read 32 degrees and comparing with other devices it appears to be accurate at temperatures above zero.
Unfortunately I do not have a data sheet or any specifications for this RTD. It is 100 OHM Platinum RTD Probe .25" diameter, 1.75" in length, 3 Wire 40' long.
It was originally intended to be used in an incubator so low temperatures were not required.
I am guessing the temperature range of this RTD is the issue but I have never seen an RTD that did not read sub zero temperatures in my limited experience with them. If that is the case I am supposing I need a different RTD for these temperatures. What do you think?
Thank you!
Adriel
I have a question about 100 Ohm Platinum RTDs.
Using this with an Allen Bradley 1771-IR series C It appears that when the temperature drops to sub zero the readings are not accurate. I see mercury and thermister thermometers reading -6 for example but the RTD reading +2
I checked the accuracy of the RTD with a glass of crushed ice when I installed it - it read 32 degrees and comparing with other devices it appears to be accurate at temperatures above zero.
Unfortunately I do not have a data sheet or any specifications for this RTD. It is 100 OHM Platinum RTD Probe .25" diameter, 1.75" in length, 3 Wire 40' long.
It was originally intended to be used in an incubator so low temperatures were not required.
I am guessing the temperature range of this RTD is the issue but I have never seen an RTD that did not read sub zero temperatures in my limited experience with them. If that is the case I am supposing I need a different RTD for these temperatures. What do you think?
Thank you!
Adriel
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