Keithley 3720-ST User Manual

Appendix B: Verification and adjustment Series 3700A System Switch/Multimeter Reference Manual
B-10 3700AS-901-01 Rev. D/June 2018
DC current verification data 10 µA to 100 µA ranges
Use the following values to verify the performance of the Series 3700A. Actual values depend on
published specifications (see Example reading limit calculation (on page B-3)).
Connect Keysight 3458A in series with 5700 calibrator
Description
Range (A)
Test point(A)
Lower limit (A)
Upper limit (A)
Verify 10 µA Zero
1.00E-05
0.00E+00
-3.000000E-10
3.000000E-10
Verify DC Curr 10 µA
1.00E-05
1.00E-05
9.994700E-06
1.000530E-05
Verify DC Curr 10 µA
1.00E-05
-1.00E-05
-1.000530E-05
-9.994700E-06
Verify 100 µA Zero
1.00E-04
0.00E+00
-3.000000E-09
3.000000E-09
Verify DC Curr 100 µA
1.00E-04
1.00E-04
9.994910E-05
1.000509E-04
Verify DC Curr 100 µA
1.00E-04
-1.00E-04
-1.000509E-04
-9.994910E-05
Verifying DC current 1 mA to 3 A ranges
Check DC current accuracy by applying accurate current from the DC current calibrator to the Series
3700A analog backplane connector and verifying that the displayed readings fall within specified
limits.
The Fluke 5725A amplifier is only needed when verifying the 3 A range.
To verify DC current accuracy:
1. Connect the Series 3700A AMPS and LO INPUT pins to the DC current calibrator as shown in
the "DC current verification 1 mA to 3 A ranges diagram" below, using the Keithley Instruments
Model 3706-751 fixture cable.
2. Select the DC current function.
3. Set the Series 3700A to the applicable ranges. Make sure that relative offset is disabled.
4. Source DC current for each of the test points summarized in the DC current verification data
table. For each setting, be sure that the reading is within stated limits.
Figure 161: DC current verification 1mA to 3A ranges

Keithley 3720-ST Specifications

General

Brand	Keithley
Model	3720-ST
Category	Multimeter
Language	English