We have a Keithley 4200A with Clarius version 1.4.1. We wish to update to Clarius 1.5 to use multi segment sweeps (issue numbers SCS-3730, SCS-3803 in the release notes https://www.tek.com/keithley-4200a-scs- ... ease-notes). However, in the list of known problems (see release notes), problem number SCS-3712 / AR60504 reads:
This seems like a very serious problem. I have a few questions regarding it, and I would appreciate answers to some or all of them:Subsystem: 4200A-CVIV
Symptom: Device damage can occur when SMU is executing a range change. This is due to an SMU loop not
being able to handle CVIV inductive load during one step in range change process. In such instance,
SMU output can slew to power supply rail. If interlock is present, output voltage can be as high as
210V for a short time during range change. This issue affects high current ranges of the SMU,
therefore it is present with or without Preamp.
Workaround: Use OVP (AVM) at a setting just above required test voltage. This will reduce likelihood of
- Was this problem introduced in v1.5 or was it there also in previous versions, just was not discovered? It is not listed in the release notes of v1.4.1 (http://download.tek.com/software/suppor ... V1.4.1.pdf), but maybe it was just not discovered.
- When is this serious problem expected to be fixed?
- Would changing the range between tests also cause this problem, or only when changing the range during a test?
- If this problem was not present in version 1.4.1, I think we would stay with our current version until it is fixed. If this problem was just recently discovered but was always there, we would update. Would you recommend updating from v1.4.1 to v1.5?