Verifying Ac Current 1Ma To 3A Ranges - Keithley 3700 series Reference Manual

Section 10: Verification
DC current verification data 1mA to 3A ranges
Use the following values to verify the performance of the Series 3700. Actual values are
dependent on published specifications. See
Applied current
Zero 1mA
Verify DC curr 1mA
Verify DC curr 1mA
Zero 10mA
Verify DC curr 10mA
Verify DC curr 10mA
Zero 100mA
Verify DC curr 100mA
Verify DC curr 100mA
Verify DC curr 1A
Verify DC curr 1A
Verify DC curr 3A
Verify DC curr 3A

Verifying AC current 1mA to 3A ranges

Check AC current accuracy by applying accurate current from the AC current calibrator at
specific frequencies to the Series 3700 analog backplane connector and verify that the
displayed readings fall within specified limits.
To verify AC current accuracy:
1. Setup the U.U.T. (Unit Under Test) for DC Current and the range being tested. Make sure
REL is disabled.
2. Verify the Zero testpoint for each range without any connection to the equipment and verify
the readings fall within specified limits.
3. Connect the Series 3700 AMPS and LO INPUT pins to the AC current calibrator as shown in
the figure titled AC current verification 10µA-1A ranges.
4. Setup the HP3458A to the AC Current function and range.
5. Set the calibrator to source zero current and REL both the UUT and the HP3458A.
6. Source AC current for the 10µA-1A range test points summarized in the AC current
verification data table. For each setting, be sure that the reading is within stated limits.
10-12
Series 3700 System Switch/Multimeter Reference Manual
Example reading limit calculation
Range Current
1.00E-03 1.00E-03
1.00E-03 -1.00E-03
1.00E-02 1.00E-02
1.00E-02 -1.00E-02
1.00E-01 1.00E-01
1.00E-01 -1.00E-01
1.00E+00 1.00E+00
1.00E+00 -1.00E+00 -1.000810E+00
3.00E+00 3.00E+00
3.00E+00 -3.00E+00 -3.003645E+00
Document Number: 3700S-901-01 Rev. A / August 2007
Lower limit Upper limit
9.996910E-04 1.000309E-03
-1.000309E-03 -9.996910E-04
9.996910E-03 1.000309E-02
-1.000309E-02 -9.996910E-03
9.996910E-02 1.000309E-01
-1.000309E-01 -9.996910E-02
9.991900E-01 1.000810E+00
-9.991900E-01
2.996355E+00 3.003645E+00
-2.996355E+00
(on page 10-3).