Frequency Checks - Fluke 8508A Service Manual

Frequency Checks

Equipment Configuration
1. Ensure that the calibrator output is set to
Guard (
EXT GRD
2. Connect the equipment as described for Routine Calibration.
3. Press the
ACV
4. Press the
CONFIG
5. Confirm that the 8508A is configured for internal guard (External Guard is
deselected) by checking that the
display.
Procedure
1. On the 8508A press
2. Press the
MONITOR key
3. On the calibrator set the output to the voltage to 1V and frequency to 1MHz. Set the
output to
OPERATE
4. Note the Multimeter's frequency reading. Check the result is within 0.000012MHz,
taking into account any known error from nominal of the calibrator output frequency
for this point.
5. Set the calibrator output to
is deselected).
key, select the 2V range
key. Select
Tfer On, Filt 40Hz.
Ext Grd
and then
MONITOR
and select
FREQ
.
.
STANDBY
Calibration and Verification
and configured for Internal
STANDBY
legend does not appear on the left-hand
. Deselect FREQ GATE Fast.
CONFIG
.
Performance Verification
3
3-43