Post by yhbyhb4433 on Nov 29, 2018 17:37:11 GMT -5
Hello, my Cernox is malfunctioning, and I'm trying to figure out what could have caused the problem. I'm seeing a current of 15-20uA at 295K (which is misleading because it's supposed to be 120ohm at 300K for 2mV excitation). But at 78K, it still has a current of 10uA. This happens after I soldered the leads onto PCB pads. I don't think the solder iron was applied for more than a couple of seconds, but it seems the Cernox is malfunctioning since. Are there any failure mode that could cause Cernox to have similar current across temperatures? Thank you.
Post by Lake Shore Jeff M on Nov 30, 2018 8:12:57 GMT -5
In order to assist in the troubleshooting, I will need additional information. Please let me know the following: Model and/or serial number of the sensor How you are making the leakage current measurements What is the resistance between leads I+ & V+, I- & V-, V+ to V- Also, measure between each lead and the sensor package or the chassis if the sensor is mounted.
With this information, I can determine what may be causing the leakage.