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Series 3700A System Switch/Multimeter Reference Manual Appendix B: Verification and adjustment

3700AS-901-01 Rev. D/June 2018 B-17

To verify dry circuit resistance accuracy:

1. Using shielded, Teflon-insulated or equivalent cables in a 4-wire configuration, connect the Series

3700A INPUT and SENSE pins to the calibrator as shown for 100 Ω to 10 MΩ ranges.

2. Set the calibrator for 4-wire resistance with external sense on.

3. Select the Series 3700A 4-wire resistance function.

4. Enable dry circuit resistance function (see Enable or disable dry circuit ohms from the front panel

(on page 4-65)).

5. Set the Series 3700A for the 100 Ω range, and make sure the FILTER is on. Enable OC+ (offset-

compensated ohms). Use OC+ for 100 Ω and 1 kΩ range verification. See Enabling/disabling

offset-compensated ohms (on page 4-67) in the User's manual.

6. Recalculate reading limits based on actual calibrator resistance values.

7. Source the nominal full-scale resistance values for the 100 Ω to 2 kΩ ranges summarized in the

Dry circuit resistance verification data (on page B-17) table. Verify that the readings are within

calculated limits.

Figure 168: Resistance verification

Dry circuit resistance verification data

Use the following values to verify the performance of the Series 3700A. Actual values depend on

published specifications (see Calculating resistance reading limits (on page B-4)).

Description

Range (Ohms)

Test point (Ohms)

Lower limit (Ohms)

Upper limit

(Ohms)

Verify Dry Circuit 100 Ω *

1.00E+02

9.997800E+01

1.000220E+02

Verify Dry Circuit 1 kΩ

1.00E+03

9.995200E+02

1.000480E+03

Verify Dry Circuit 2 kΩ

2.00E+03

1.90E+03

1.898320E+03

1.901680E+03

The asterisk (*) designates the ranges that offset compensation is being used.

Keithley 3700 Series User Manual

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