Keithley DMM6500

Section 2: Performance verification Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
2-10 DMM6500-905-01 Rev. A/July 2018
Verify the AC voltage 100 mV range
Input
Frequency
Lower limit
Upper limit
0.1
3.0E+01
9.9910E-02
1.00090E-01
0.1
1.0E+03
9.9910E-02
1.00090E-01
0.1
5.0E+04
9.9830E-02
1.00170E-01
0.1
1.0E+05
9.9320E-02
1.00680E-01
Verify the AC voltage 1 V range
Input
Frequency
Lower limit
Upper limit
1
3.0E+01
9.991000E-01
1.000900E+00
1
1.0E+03
9.991000E-01
1.000900E+00
1
5.0E+04
9.983000E-01
1.001700E+00
1
1.0E+05
9.93200E-01
1.006800E+00
Verify the AC voltage 10 V range
Input
Frequency
Lower limit
Upper limit
10
3.0E+01
9.991000E+00
1.000900E+01
10
1.0E+03
9.991000E+00
1.000900E+01
10
5.0E+04
9.983000E+00
1.001700E+01
10
1.0E+05
9.932000E+00
1.006800E+01
Verify the AC voltage 100 V range
Input
Frequency
Lower limit
Upper limit
100
3.0E+01
9.991000E+01
1.000900E+02
100
1.0E+03
9.991000E+01
1.000900E+02
100
5.0E+04
9.983000E+01
1.001700E+02
100
1.0E+05
9.932000E+01
1.006800E+02
Verify AC voltage accuracy for the 750 V range
Use shielded low capacitance cabling. For the 750 V range, avoid cable capacitances of >150 pF.
Excessive capacitance may result in additional load regulation uncertainties and could cause the
calibrator output to open (go into standby).
To verify AC voltage accuracy for the 750 V range:
1. Put the calibrator in Standby.
2. Connect the DMM6500 HI and LO INPUT connectors to the calibrator as shown in the following
figure.
3. For 750 V at 50 kHz and 100 kHz outputs, connect the calibrator to the Fluke 5725A amplifier.