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DMM800 Series Adjustment Procedures
Handheld Instruments Basic Service
39
5.
Turn the calibrator output off.
6.
Disconnect the calibrator from the multimeter.
Perform the following steps to adjust the capacitance calibration.
1.
Set the multimeter dial to .
2.
Null the residual DMM and lead capacitance offset.
a.
Using Fluke 5500A or Wavetek 9100 minus the 9105 front porch:
�
Turn the calibrator output off.
�
Connect the test leads to the multimeter
�
C V
�
�
and COM
inputs.
�
Connect the multimeter COM lead to the calibrator common output.
�
Press the multimeter gold key followed by the
�
/% key.
�
Connect the multimeter
�
C V
�
�
lead to the remaining calibrator
output.
�
Turn the calibrator output on.
b.
Using Wavetek 9100 with 9105 front porch:
�
Turn the calibrator output off.
�
Connect the multimeter test leads to the calibrator outputs.
�
Connect the calibrator common lead to the multimeter COM input.
�
Press the multimeter gold key followed by the
�
/% key.
�
Connect the remaining calibrator output lead to the multimeter
�
C V
�
�
input.
�
Turn the calibrator output on.
3.
Set the calibrator to output 300 nF.
4.
Adjust VR2 until the display shows 299.9 to 300.1 nF.
5.
Set the calibrator to output 1.000
�
F.
6.
Adjust VR3 until the display shows 0.999 to 1.001
�
F.
7.
Set the calibrator to output 100.0
�
F.
8.
Adjust VR1 until the display shows 99.9 to 100.1
�
F.
9.
Turn the calibrator output off.
Capacitance