Ac Current Calibration - Fluke 8508A Service Manual

Range Gain Points
1. On the Calibrator, select the positive Range Gain point Output value.
2. On the Multimeter, Press
3. Select on the
Set
4. Use the numeric keys with the
the calibrator at the range gain value, then press Enter.
5. Press
SAMPLE
6. Calibration is complete when the Busy legend goes out and the calibrated
measurement is displayed.
7. On the Calibrator, select the negative Range Gain point Output value.
8. Repeat steps 3 to 5 above to calibrate the negative Range gain point.
9. On the Calibrator, set
10. Press the DCI key to revert to the ranges menu.

AC Current Calibration

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.
Initial Setup and Connections
1. Press the ACI key, and select the
2. Press the
CONFIG
and the 100Hz RMS filter is automatically selected. It is recommended that
RESL6
this resolution and 100Hz Filter is used for calibration of all ACI ranges.
3. Reselect
ACI
4. Confirm that the Multimeter is configured for internal guard (External Guard is
deselected) by checking that the
display.
5. Ensure that the calibrator output is set to
Guard (
EXT GRD
6. Connect the Calibrator to the Multimeter as shown above.
Range Zero and LF Gain Calibration Procedure
Using the following procedure to calibrate range zero then range gain on all ACI ranges
at the currents and frequencies detailed in Table 3-7. Just one range can be calibrated if
required, but for a full-calibration start with the 200 µA range and work up to the 20A
range.
to revert to
CAL
CALIBRATION menu
SET VALUE
to initiate the calibration operation.
.
STANDBY
XW Warning
200μA
key. In calibration mode in the ACI function resolution defaults to
.
Ext Grd
is deselected).
menu.
CALIBRATION
.
menu to key in the true output value of
range.
legend does not appear on the left-hand
and configured for Internal
STANDBY
Calibration and Verification
Routine Calibration
3
3-27