Service manual

Calibration and Verification
Performance Verification 3
3-35
AC Voltage Checks
XW Warning
The Calibrator can deliver a lethal electric shock.
To avoid electric shock when performing the following
calibration procedures:
• Never touch any lead or terminal unless you are absolutely
certain that no dangerous voltage is present.
• Make sure that signal leads are in a safe condition before you
handle them in any way.
Equipment Configuration
1. Ensure that the calibrator output is set to
STANDBY and configured for Internal
Guard (
EXT GRD is deselected).
2. Connect the equipment as described for Routine Calibration.
3. Press the
ACV key
4. Press the
CONFIG key. Select Tfer On and RESL6.
5. Confirm that the Multimeter is configured for internal guard (External Guard is
deselected) by checking that the
Ext Grd legend does not appear on the left-hand
display.
Procedure
Repeat the following sequence for each range, starting with the 200mV range and
working up to the 1kV range, as listed in Table 3-9.
1. Select the required range on the multimeter.
2. On the Multimeter press
CONFIG and select the appropriate filter for the point being
verified as listed in Table 3-9.
3. On the calibrator set the output to the voltage and frequency for the point being
verified as listed in Table 3-9. Set the output to
OPERATE.
4. Note the Multimeter’s reading. Compare the result with the allowable tolerance,
taking into account any known error from nominal of the calibrator for this output.
5. Repeat steps 2 – 4 for each point to be verified on the Multimeter’s range to be
verified.
6. Repeat steps 1 – 5 for each Multimeter range to be verified.
7. Set the calibrator output to
STANDBY.
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