8508A
Users Manual
AC Voltage Checks
Warning
The Calibrator can deliver a lethal electric shock.
To avoid electric shock when performing the following adjustment
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. On the 8508A press the
ACV key, and select 1kV range. Ensure Tfer On is selected.
Ensure that the 8508A is configured for internal guard (External Guard is deselected)
by checking that the
ExGd legend does not appear on the left hand display.
2. Ensure that the Calibrator output is set to
STANDBY and configured for Internal
Guard (
EX GRD is deselected)
3. Connect the equipment as described for Routine Adjustment.
Procedure
Repeat the following sequence for each range, starting with the 200mV range and
working up to the 1kV range, as listed in Table 6-9.
1. Select the required 8508A range.
2. On the 8508A press
CONFIG and select the appropriate filter for the point being
verified as listed in Table 6-9.
Note
DC-coupled should be selected for signal frequencies less than 40 Hz.
3. On the calibrator set the output to the voltage and frequency for the point being
verified as listed in Table 6-9. Set the output to
OPERATE.
4. Note the 8508A 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 8508A range to be verified.
6. Set the calibrator output to
STANDBY.
6-40
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