Fluke 125B/S Calibration Guide - Page 22

Remove the Input A and Input B short., On the Test Tool, push

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123B/124B/125B Calibration Manual e. To set Input B, push  and make these selections: • Coupling: DC • Readings: Normal • Noise filter: ON 3. On the Test Tool, push  to toggle the time base between 10 ms/div and 5 ms/div. The time base ranging is set to manual. The input sensitivity is automatic. Neither AUTO nor MANUAL show on the display. 4. After the time base changes, wait a few seconds for the trace to become stable. 5. Make sure the Input A trace returns to the same position after the time base changes. The allowed difference is ±0.025 division (= 1 pixel). 6. Repeat step 5 for the Input B trace. 7. Push  to toggle the time base between 1 μs/div and 500 ns/div. 8. After the time base changes, wait a few seconds for the trace to become stable. 9. Make sure the Input B trace returns to the same position after the time base changes. The allowed difference is ±0.025 division (= 1 pixel). 10. Remove the Input A and Input B short. 14

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123B/124B/125B
Calibration Manual
14
e.
To set Input B, push
and make these selections:
•
Coupling:
DC
•
Readings:
Normal
•
Noise filter:
ON
3.
On the Test Tool, push
to toggle the time base between 10 ms/div and 5 ms/div.
The time base ranging is set to manual. The input sensitivity is automatic. Neither AUTO nor MANUAL show on
the display.
4.
After the time base changes, wait a few seconds for the trace to become stable.
5.
Make sure the Input A trace returns to the same position after the time base changes. The allowed difference is
±0.025 division (= 1 pixel).
6.
Repeat step 5 for the Input B trace.
7.
Push
to toggle the time base between 1
μ
s/div and 500 ns/div.
8.
After the time base changes, wait a few seconds for the trace to become stable.
9.
Make sure the Input B trace returns to the same position after the time base changes. The allowed difference is
±0.025 division (= 1 pixel).
10.
Remove the Input A and Input B short.