Performance Testing and Calibration
Front Panel Calibration
4
4-9
4-7. Exiting Calibration Mode
Calibration mode can be exited at any time by pressing the Cal Enable button. However,
if this button is pressed prior to completion of all calibration points for any function, no
changes are made to nonvolatile calibration memory for that function.
If calibration mode is exited after completion of calibration of any function except VDC,
constants for other functions are not affected. But remember, whenever VDC is
calibrated, the calibration procedure for all other functions should be performed.
To exit the calibration mode, press the Cal Enable button with a small screwdriver or
equivalent blunt-tipped object. Avoid using sharper-tipped objects (such as pencils).
4-8. DC Volts Calibration (Front Panel)
To perform VDC calibration, proceed as follows:
1. Press the Cal Enable button for 3 seconds to enter the calibration mode. Or, if the
meter is already in calibration mode, but set for a different type of calibration, press
the
T button to return to VDC calibration.
2. Press the
E button to select the first prompt (0.000 mV DC) for the VDC
function.
3. Apply a shorting bar to the
X and COM inputs of the meter and allow 5
seconds for meter settling.
Note
After voltage is applied to the X input, the meter can take up to 4
minutes to settle to zero within one microvolt once the voltage is removed.
For this reason, no voltage should be applied to the input for 4 minutes
before doing zero mV cal.
4. Push the
E button to calibrate the meter zero mV calibration point.
5. Remove the short and connect the dc volts source to the
X and COM inputs of
the meter.
6. Complete calibration steps 2 through 10 in Table 4-5.
4-9. AC Volts Calibration (Front Panel)
To perform ac volts calibration, proceed as follows:
1. If the meter is already in calibration mode, press the
U or T button to select
VAC calibration. Otherwise, select calibration mode first (press Cal Enable button
for three seconds), then select VAC calibration by pressing the
U button once.
2. Connect the ac source to the
X and COM inputs of the meter.
3. For each of steps 11 through 17 (Table 4-5), apply the source output indicated and
calibrate the meter by pressing the
E button.
4-10. DC and AC Milliamp Calibration (Front Panel)
Perform the dc and ac milliamps calibration as follows:
1. If the meter is already in calibration mode, press the
U or T button to select
mA DC calibration. Otherwise, select calibration mode first (press Cal Enable button
for three seconds), then select mA DC calibration by pressing the
U button twice.
2. Connect the dc milliamps source to the [100 mA] and COM inputs.
3. Apply the dc milliamp outputs indicated in Table 4-5 (steps 18 and 19), and calibrate
the meter with the
E button.
4. Press the
U button to select mA AC calibration.
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