Keithley DMM6500, Manual

Page: 21 / 123

DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual Section 2: Performance verification
DMM6500-905-01 Rev. E June 2021 2-11
To verify ac voltage accuracy:
1. Connect the DMM6500 HI and LO INPUT connectors to the calibrator as shown in the following
figure.
Figure 2: Connections for ac voltage verification 100 mV to 100 V ranges
2. On the DMM6500, press the FUNCTION key and select AC voltage .
3. On the home screen, select the button next to Range and select 100 mV .
4. Press the MENU key.
5. Under Measure, select Settings .
6. Make sure 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 ≈ 2 readings/s. T
o improve verification
throughput to ≈ 20 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 ≈ 200
readings/s throughput.
7. Source ac voltages for each of the frequencies listed in the Verify the ac voltage 100 mV range
(on page 2-12) table.
8. Repeat these steps for each range and frequency listed in the tables below. For each voltage
setting, be sure that the reading is within low and high limits.