Hi Jürg,
Jürg Kögel wrote:
Make the adjustment in the correct sequence:
1. Set the Cal jumper to Cal Enable
2. Connect the reference to Ext Ref (rear) and Input A
3. Switch the counter to Ext Ref
4. Set the CalByte 50 for the best display (this is a very fine adjustement)
5. Switch the counter to Int Ref
6. Set the CalByte 4 for the best display (this adjustement is coarse,
optimize!)
7. Set the Cal jumper to Cal Disable
After this calibration my SR620 is
with the external reference +/- 3 counts (9'999'999.9997x....10'000'000,0003)
previous value -210 counts
with the internal reference +/- 6 counts
previous value -25 counts
Thanks for that clarification. It seems very reasnoble. I obviously
never bothered to do a carefull calibration of my SR620, so I haven't
picked up the fine grain details involved with these procedures. This is
a good reminder that I should pay attention to those details. I think I
can say the same for most of my gear.
Cheers,
Magnus
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