Tektronix Technical Forums are maintained by community involvement. Feel free to post questions or respond to questions by other members. Should you require a time-sensitive answer, please contact your local Tektronix support center here.
409, 41x, 42x, 44x, 48x -
14x, 18x, 1801 Nanovoltmeters
15x, 18x Null Detectors/Microvoltmeters
How can I overcome warmup thermal drift in a 617 unit?
It has been powered up 20 hours ago, and measuring current through a 10 kOhm resistor alone, placed inside a vacuum cryostat (in thermal equilibrium). It started measuring ~2 pA and now it's measuring ~50 pA, still growing! The room temperature is being kept constant at ~23 °C.
Also, are there any means to make this unit to properly respond an "*IDN?" call from GPIB?
This would make my life easier interfacing this instrument!
As far as the remote interface, it's documented in the manual which is still on our website. I do not believe *idn? is supported.
- Keithley Applications
- Posts: 2845
- Joined: June 10th, 2010, 6:22 am
- Country: United States
You can find these DDC commands in the instruction manual. Here is the link.
The Model 617 should not have more than 5fA(5e-15A) of offset or drift when warmed up for one hour.
If there is more offset or drift than the 5fA then the unit is in need of service.
Who is online
Users browsing this forum: No registered users and 2 guests