Keithley DMM6500

Section
2: Performance verification DMM6500 6½-Digit Multimeter with Scanning
Calibration and Adjustment Manual
2-12 DMM6500-905-01 Rev. E June 2021
Verify the ac voltage 100 mV range
Nominal value Frequency Lower limit Upper limit
0.1
20 Hz
99.91
100.09
0.1
1 kHz
99.91
100.09
0.1
50 kHz
99.83
100.17
0.1
100 kHz
99.32
100.68
Verify the ac voltage 1 V range
Nominal value Frequency Lower limit Upper limit
1
20 Hz
.9991
1.0009
1 1 kHz .9991 1.0009
1
50 kHz
.9983
1.0017
1
100 kHz
.9932
1.0068
Verify the ac voltage 10 V range
Nominal value Frequency Lower limit Upper limit
10
20 Hz
9.991
10.009
10 1 kHz 9.991 10.009
10
50 kHz
9.983
10.017
10
100 kHz
9.932
10.068
Verify the ac voltage 100 V range
Nominal value Frequency Lower limit Upper limit
100
20 Hz
99.910
100.09
100
1 kHz
99.910
100.09
100
50 kHz
99.830
100.17
100
100 kHz
99.320
100.68
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).