Series 3700 System Switch/Multimeter Reference Manual
Section 10
:
Verification
Document Number: 3700S-901-01 Rev. A / August 2007
10-5
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
When performing the verification procedures:
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.
Series 3700 verification
Perform these tests to verify the accuracy of your Series 3700 at the analog backplane
connector.
NOTE
U.U.T. stands for unit under test.
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
Do not exceed 300V peak between INPUT HI and INPUT LO because
instrument damage may occur.
To verify DC voltage accuracy:
NOTE
Use shielded, low-thermal connections when testing the 100mV and 1V ranges to
avoid errors c
aused by noise or thermal effects. Connect the shield to the calibrator‘s
output LO terminal.
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.
