Fluke 8508A - Verification Procedures; DC Voltage and Current Verification

Calibration and Verification
Performance Verification 3
3-33
* Fluke guarantees the Multimeter’s performance verification using specifications stated
to 99 % confidence level.
Preparation
1. Allow the Multimeter to warm-up under power in the specified environment for at
least 4 hours.
2. Press the
CLEAR key, select Pwr Up Dflt to restore the power up default configuration
and display the
DCV menu.
3. Press the
Test key and select Std to initiate a selftest. Should the Multimeter fail,
contact your local authorized Service Center, ensuring that the full circumstances of
the failure are reported.
DC 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
DCV key
4. Press the
CONFIG key. Select Filt and RESL7.
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 3-8. An input zero operation is performed
on each Multimeter range prior to performing the range verification measurements with
the calibrator set to zero by range locking the calibrator in the range from which the
output will be obtained.
1. Select the required Multimeter range.
2. On the calibrator set the output to zero. Select OPERATE.
3. On the Multimeter press the
INPUT key, and select Zero Rng to initiate the zeroing
operation.
The
Busy legend will appear, and then extinguish when the zero operation has
completed.
4. On the calibrator select the value required for verification in the positive polarity.