Post by nikola on Feb 21, 2024 13:29:50 GMT -5
Hi,
I use temperature controller 350. On channel A I have Pt100 and channel B NTC100kOhm. The problem is that on channel B after exceeding the temperature limit of channel B, the resistance of the NTC is measured wrong. I measured via a multimeter and Keithley 2002, both show resistance of 112kOhm at room temperature. However, LakeShore measures 3kOhm??? If I switch the channels to and measure Pt100 on channel B and NTC100kOhm on channel A is the same channel A shows wrong values for NTC while channel B is correct for Pt100.
I tested on another controller also a 350 model and have the same issue (both can not be damaged)!? But on 334 model it shows the correct resistance for NTC100kOhm.
Any idea, how to manage the troubleshooting?
I use temperature controller 350. On channel A I have Pt100 and channel B NTC100kOhm. The problem is that on channel B after exceeding the temperature limit of channel B, the resistance of the NTC is measured wrong. I measured via a multimeter and Keithley 2002, both show resistance of 112kOhm at room temperature. However, LakeShore measures 3kOhm??? If I switch the channels to and measure Pt100 on channel B and NTC100kOhm on channel A is the same channel A shows wrong values for NTC while channel B is correct for Pt100.
I tested on another controller also a 350 model and have the same issue (both can not be damaged)!? But on 334 model it shows the correct resistance for NTC100kOhm.
Any idea, how to manage the troubleshooting?
