Series 3700 Verification; Verifying Dc Voltage - Keithley 3700 series Reference Manual

Series 3700 System Switch/Multimeter Reference Manual
When performing the verification procedures:
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Series 3700 verification

Perform these tests to verify the accuracy of your Series 3700 at the analog backplane
connector.
NOTE

Verifying DC voltage

Check DC voltage accuracy by applying accurate voltages from the DC voltage calibrator to the
Series 3700 analog backplane connector and verify that the displayed readings fall within
specified limits.
CAUTION
To verify DC voltage accuracy:
NOTE
1. Connect the Series 3700 HI and LO INPUT pins to the DC voltage calibrator as shown in the
DC volts verification diagram.
2. Select the DC volts function.
3. Set the Series 3700 to the 100mV range.
4. If REL is needed, set the calibrator output to 0.00000mV DC, and allow the reading to settle.
5. Enable the Series 3700 REL mode.
Document Number: 3700S-901-01 Rev. A / August 2007
Connections of the DMM or switch card terminals to circuits higher than
CAT I can cause damage to the equipment or expose the operator to
hazardous voltages
Be sure to restore factory front panel defaults as outlined above.
Make sure that the test equipment is properly warmed up and connected to the Series
3700 terminals (use 4-wire sensing for voltage).
Be sure the test equipment is set up for the proper function and range.
Do not connect test equipment to the Series 3700 through a scanner, multiplexer, or
other switching equipment.
U.U.T. stands for unit under test.
Do not exceed 300V peak between INPUT HI and INPUT LO because
instrument damage may occur.
Use shielded, low-thermal connections when testing the 100mV and 1V ranges to
avoid errors caused by noise or thermal effects. Connect the shield to the calibrator's
output LO terminal.
Section 10: Verification
10-5