Fluke 8508A - ACV Spot Frequency Adjustment

8508A
Users Manual
Procedure
1. Press the
DCV key.
2. Press the
INPUT key and select Front.
3. From the
INPUT Menu select Zero Func.
Adjustment is complete when the Busy legend goes out.
4. If the Rear Input is fitted
From the
INPUT Menu select Rear.
From the
INPUT Menu select Zero Func.
Adjustment is complete when the
Busy legend goes out.
5. Press the Ω key. Press
CONFIG key, deselect LoI and deselect 4WΩ.
Repeat steps 2, 3 and 4.
6. Press the Ω key. Press
CONFIG key, select LoI and deselect 4WΩ.
Repeat steps 2, 3 and 4.
7. Press the Ω key. Press
CONFIG key, deselect LoI and select 4WΩ.
Repeat steps 2, 3 and 4.
8. Press the Ω key. Press
CONFIG key, select LoI and select 4WΩ.
Repeat steps 2, 3 and 4.
9. Press the Ω Plus key and select
TruΩ. Press CONFIG key, deselect LoI.
Repeat steps 2, 3 and 4.
10. Press the Ω Plus key and select
Tru Ω. Press CONFIG key, select LoI.
Repeat steps 2, 3 and 4.
11. Press the Ω Plus key and select
HiVΩ. Press CONFIG key, deselect 4WΩ.
Repeat steps 2, 3 and 4.
12. Press the Ω Plus key and select
HiVΩ. Press CONFIG key, select 4WΩ.
Repeat steps 2, 3 and 4.
13. Press the
DCV key and remove the shorting devices from the input terminals.
Calibration Mode Disable
1. Set the rear panel Calibration Enable switch to
DISABLE .
2. Apply a security seal to cover the rear panel Calibration Enable switch to prevent
unauthorized access.
ACV Spot Frequency Adjustment
The ACV Spot frequency mode adjustment is not normally performed as part of routine
adjustment. ACV Spot frequency adjustment is only performed if the user intends to
make use of spot frequency mode. In spot frequency mode the accuracy of AC Voltage
measurements can be improved by adjusting the 8508A at specific frequencies of interest,
reducing frequency response flatness errors at these points. The following procedure
provides guidance on spot frequency adjustment for users wishing to make use of Spot
frequency mode.
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