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Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
Section 2: Performance verification
DMM6500-905-01 Rev. A/July 2018
2-9
Verify AC voltage accuracy for the 100 mV to 100 V ranges
Use shielded, low-capacitance cabling. For the 100 mV to 100 V ranges, avoid loading that exceeds
1000 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:
1. Connect the DMM6500 HI and LO INPUT connectors to the calibrator as shown in the following
figure.
Figure 3: 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 ≈ 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.
7. Source AC voltages for each of the frequencies listed in the
Verify the AC voltage 100 mV range
(on page 2-10) 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.