2-Wire Resistance Accuracy Test (Pai) - Optional - Fluke 2680A User Manual

2-Wire Resistance Accuracy Test (PAI) - Optional

Complete the following procedure to test the accuracy of the resistance function
for the PAI using 2 terminals. Measurement accuracy applies to all channels, not
just the channel used for the test. The 4-wire resistance accuracy test is more
rigorous and you may wish to skip this step and continue to 4-Wire Resistance
Accuracy Test described later in this Chapter.
1. Connect the Resistance Source to Channel 1 Remove the Universal Input
module from the instrument and connect a cable from the Decade Resistance
Source to the Universal Input module terminals for channel 1. Reinstall the
Universal Input module. You may also use the 5700A resistance calibration
output instead of the Decade Resistance Source. Tables are provided for both
connections.
2. Configure Channel 1 for Ohms In Fluke DAQ, configure channel 1 for
Ohms-2W, 300 range.
3. Open Spy Open the Spy window under the Configuration dialog.
4. Verify Accuracy Configure the Decade Resistance Source for the output
values below and verify the Spy window measurement is between the
minimum and maximum values. Change the channel 1 range as required (see
Step 2).
Resistance Range*
300 Ω
300 Ω
3 kΩ
3 kΩ
30 kΩ
300 kΩ
3 MΩ
* The resistance accuracy in this table makes allowance for up to 0.1 Ω of lead wire resistance
plus 0.01% decade resistance tolerance. You must add any additional lead wire resistance
present in your setup to the resistance values given in this table.
Decade Resistor
Short Circuit (Zero)
290 Ω
Short Circuit (Zero)
2.9 kΩ
29 kΩ
290 kΩ
2.9 MΩ
Accuracy Performance Tests
Minimum Reading
0 Ω
289.86 Ω
0 Ω
2.8986 kΩ
28.983 kΩ
289.61 kΩ
2.8914 MΩ
Maintenance
Maximum Reading
10 Ω
300.14 Ω
10.5 Ω
2.9114 kΩ
29.027 kΩ
290.39 kΩ
2.9086 MΩ
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