Preparation; Dc Voltage Checks - Fluke 8508A User Manual

8508A
Users Manual
DC current, ohms and Temperature function verifications.) We recommend that the 8-
digit resolution mode be used if performance verification shows a borderline out-of-
tolerance condition. In such cases 8-digit mode can be selected and the specifically
borderline verification tests can be repeated. This will provide additional confidence in
the in-tolerance or out-of-tolerance decision made during verification.
* Fluke guarantees 8508A performance verification using specifications stated to 99 %
confidence level.

Preparation

1. Allow the instrument to warm-up under power in the specified environment for at
2. Press the
3. Press the

DC Voltage Checks

The Calibrator can deliver a lethal electric shock.
To avoid electric shock when performing the following calibration
procedures:
Equipment Configuration
1. Ensure that the calibrator output is set to
2. Connect the equipment as described for Routine Calibration.
3. Press the
4. Press the
5. Confirm that the 8508A is configured for internal guard (External Guard is
Procedure
Repeat the following sequence for each range, starting with the 200mV range and
working up to the 1kV range, as listed in Table 7-8. An input zero operation is performed
on each 8508A 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 8508A range.
2. On the calibrator set the output to zero. Select OPERATE.
6-32
least 4 hours.
key, select
CLEAR
and display the menu.
DCV
key and select
Test
contact your local authorized Service Center, ensuring that the full circumstances of
the failure are reported.
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.
Guard ( is deselected).
EXT GRD
key
DCV
key. Select
CONFIG
deselected) by checking that the
display.
to restore the power up default configuration
Pwr Up Dflt
to initiate a selftest. Should the instrument fail,
Std
XW Warning
STANDBY
and .
Filt RESL7
legend does not appear on the left-hand
Ext Grd
and configured for Internal