Resistance Verification - Keithley DMM6500 Manual

DMM6500 6½-Digit Multimeter with Scanning Calibration and Adjustment Manual
14. Repeat for 100 Ω and 190 Ω source values.
Example
Nominal
calibrator
value
(Ω)
19
100
190

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.
•
Characterize 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.
DMM6500-905-01 Rev. E June 2021
PT100
R
0
alpha
beta
delta
A
B
C
Actual calibrator Temperature
value (°C)
(Ω)
18.999520 -198.8900
99.99707 -0.0075
189.99234 238.6775
1.000000E+02
3.850550E-03
1.086300E-01
1.499900E+00
3.908304E-03
-5.775440E-07
-4.182852E-12
4-wire RTD
±0.06 °C accuracy
(±Ω from actual
calibrator value)
0.0259
0.0235
0.0218
Section 2: Performance verification
3-wire RTD
±0.75 °C accuracy
(±Ω from actual
calibrator value)
0.3241
0.2932
0.2725
2-25