Model DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
Section 2: Performance verification
DMM6500-905-01 Rev. A/July 2018
2-21
Resistance verification
Use the following information to verify the performance of the DMM6500 resistance functions.
Four-wire resistance verification
To verify the 4-wire resistance function, you will:
•
Use shielded, Teflon-insulated or equivalent cables in a 4-wire configuration.
•
Chara
cterize the calibrator 1 Ω and 10 Ω nominal values with an external reference digital
multimeter (DMM); verify accuracy from the reference DMM readings.
•
For the 100 Ω to 100 MΩ ranges, verify accuracy from actual calibrator source values.
•
Verify that the displayed readings are within specified limits.
Verify 4-wire resistance accuracy
To verify 4-wire resistance accuracy:
1. Connect the DMM6500 INPUT and SENSE terminals to the calibrator as shown in the following
figure.
Figure 10: Connections for 4-wire resistance accuracy verification
2. Set the calibrator for 4-wire resistance with external sense on.
3. On the DMM6500, press the
FUNCTION
key and select
4W Res
.
4. Press the
MENU
key.
5. Under Measure, select
Settings
.
6. Set Offset Compensation
On
.
7. Verify that Open Lead Detector is
Off
.
8. On the Home screen, select the button next to Range and select
1 Ω
.
9. Source the nominal zero and full-scale resistance values for the 1
Ω to 10 kΩ ranges. Source the
nominal zero value for the 100
kΩ range. Refer to the tables in
(on page 2-22).