Keithley DMM6500

Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification
DMM6500-905-01 Rev. A/July 2018 2-11
Figure 4: Connections for AC voltage accuracy verification 750 V range
4. On the DMM6500, press the FUNCTION key and select AC voltage.
5. On the Home screen, select the button next to Range and select 750 V.
6. Press the MENU key.
7. Under Measure, select Settings.
8. Ensure that detector bandwidth is set to 30 Hz.
AC voltage is specified for the detector bandwidth setting of 3 Hz. Three Hz measures accurately for
input signals from 3 Hz to 300 kHz, with reading rates ≈ 0.5 readings/s. To improve verification
throughput to ≈ 3.3 readings/s, set detector bandwidth to 30 Hz for frequencies of 30 Hz to 300 kHz.
To verify frequencies 1 kHz and higher, set the detector bandwidth to 300 Hz for faster ≈ 55
readings/s throughput.
9. Set the calibrator to OPERATE.
10. Source AC voltages for each of the frequencies listed in the "Verify the AC voltage 750 V range"
table, below. Be sure that the readings are within low and high limits.
Verify the AC voltage 750 V range
Input
Frequency (Hz)
Lower limit
Upper limit
740
5.0E+01
7.392570E+02
7.407430E+02
740
1.0E+03
7.392570E+02
7.407430E+02
740
5.0E+04
7.387370E+02
7.412630E+02
740
1.0E+05
7.349600E+02
7.450400E+02