Service manual
Calibration and Verification
Routine Calibration 3
3-29
Alternatively, the 1MHz frequency reference may be used directly as an input signal for
the Multimeter for frequency calibration.
Initial Setup and Connections
1. Press the
ACV key, select the 2 V range.
2. 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.
3. Ensure that the calibrator output is set to
STANDBY and configured for Internal
Guard (
EXT GRD is deselected).
4. Connect the Calibrator to the Multimeter as shown above.
5. If required, connect the calibrator rear panel phase lock input to a 1MHz reference
frequency and enable phase locking via the front panel menus.
Procedure
1. On the calibrator select 1V 1MHz, Operate.
2. On the Multimeter, Press
CAL to enter the CALIBRATION menu, and select SPCL.
3. Select
Freq to initiate the calibration operation.
Calibration is complete when the Busy legend goes out.
4. On the Calibrator, set
STANDBY.
Exit From Calibration Mode and Non-Volatile Input Offset Adjustment
Use the following procedure to perform non-volatile input offset adjustment on all DCV
and resistance ranges (including LoI, 2-wire, and 4-wire) for the front and rear inputs.
Initial Setup and Connections
1. Press the
CAL key and select Quit.
2. From the
CAL DUE ? menu select Quit.
3. The Multimeter will exit from
CAL mode, the CAL legend on the main display will
extinguish, and he right-hand display will revert to the currently selected function
menu.
4. Disconnect all calibration leads and connect a 8508-7000K precision 4-wire short
device to the front input terminals and also, if fitted, to the input terminals as shown
above.
Procedure
Omit step 4 if the Multimeter is not fitted with rear input terminals.
1. Press the
DCV key
2. Press the
INPUT key and select Front.
3. From the INPUT menu select
Zero Func to perform zero offset adjustment on all
ranges.
4. From the INPUT menu select
Rear. Repeat step 3.
5. Press the
Ω key and select the 2 Ω range.
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