Hi,
Yes ,after external zero calibration , the offset error slighty decreased . Test data as below.
before:
short input port zero offset: 0.19806 mv , too large offset error.
source , read, range
1, 1.19438 ,1mv
10, 10.20681 ,10mv
100, 100.4422 ,100mv
1000, 1002.125 ,1v
10000, 10018.8844 ,10v
after:
short input port zero offset: 0.00962 mv , much better, but still large. In my 34401, it's 0.001mv
1, 1.00514, 1mv
10, 10.02054, 10mv
100, 100.14873, 100mv
1000, 1001.74301,1v
10000, 10017.832, 10v
The reading is not so stable in the last 3 digit and I am using the default 10 plc.
And I just performed the external zero calibration, others like DCV, OHM calibration havn't been done. I have performed the internal calibration before, so not doing it this time.
How to do in the next step?
Best Regards,
szszjdb