Service manual

8508A
Service Manual
3-30
6. Press the CONFIG key and select Filt, LoI and 4wΩ. Repeat steps 3 and 4.
7. Press the
CONFIG key and select 2wΩ. Repeat steps 3 and 4.
8. Press the
CONFIG key, select 4wΩ and de-select LoI. Repeat steps 3 and 4.
9. Press the
CONFIG key and select 2wΩ. Repeat steps 3 and 4.
10. Press the
ΩPLUS key and select TruΩ. From the TruΩ menu the 2Ω range.
11. Press the
CONFIG key and select Filt and LoI. Repeat steps 3 and 4.
12. Press the
CONFIG key and de-select LoI. Repeat steps 3 and 4.
13. Press the
ΩPLUS key and select HiVΩ. From the HiVΩ menu the 20MΩ range.
14. Press the
CONFIG key and select Filt and 2wΩ. Repeat steps 3 and 4.
15. Press the
CONFIG key and select 4wΩ. Repeat steps 3 and 4.
16. Press the
DCV key and remove the shorting devices from the input terminals.
Cal Due Date Entry and Calibration Mode Disable
On completion of all calibration operations it is recommended that the user updates the
stored
CAL due date with the date for next recalibration. For consistency, this date should
be the same as the calibration due date shown on any calibration stickers the user may
also attach to the Multimeter. It is also recommended that a calibration seal or integrity
sticker is applied to prevent unauthorized access to the rear panel calibration enable
switch.
Set Cal Due Date
1. Press the
CAL key and select Quit.
2. From the
CAL DUE ? menu select Enter.
3. Use the keypad to key in the calibration due date. Up to eight characters may be
entered in any format. Any character available from the keypad may be used, but it is
recommended that one of the common date formats such as dd.mm.yy or mm.dd.yy
is used for ease of interpretation.
4. Press Enter to store the
CAL due date.
Disable cal mode
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 Calibration
The ACV Spot frequency mode calibration is not normally performed as part of routine
calibration. ACV Spot frequency calibration 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 calibrating the Multimeter at specific frequencies of
interest, reducing frequency response flatness errors at these points. The following
procedure provides guidance on spot frequency calibration for users wishing to make use
of Spot frequency mode.
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