Series 3700A System Switch/Multimeter Reference Manual
Appendix B: Verification and adjustment
3700AS-901-01 Rev. D/June 2018
B-5
Test considerations
When performing the verification procedures:
•
Be sure to restore factory front panel defaults as outlined in
•
Make sure that the test equipment is properly warmed up and connected to the Series 3700A
terminals.
•
Be sure the test equipment is set up for the proper function and range.
•
Do not connect test equipment to the Series 3700A through a scanner, multiplexer, or other
switching equipment.
The input/output terminals of the digital multimeter (DMM) and switch cards are rated for
connection to circuits rated Installation Category I only, with transients rated less than 1500V
peak. Do not connect the DMM or switch card terminals to CAT II, CAT III, or CAT IV circuits.
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.
Series 3700A verification tests
Perform these tests to verify the accuracy of your Series 3700A at the analog backplane connector.
Verifying DC voltage
Check DC voltage accuracy by applying accurate voltages from the DC voltage calibrator to the
Series 3700A analog backplane connector and verifying that the displayed readings fall within
specified limits.
Do not exceed 300 V
PEAK
between INPUT HI and INPUT LO because instrument damage may
occur.
To verify DC voltage accuracy:
Use shielded, low-thermal connections when testing the 100 mV and 1 V ranges to avoid errors
caused by noise or thermal effects. Connect the shield to the calibrator’s output LO terminal.
1. Connect the Series 3700A HI and LO INPUT pins to the DC voltage calibrator as shown in the
"DC voltage verification" below.
2. Select the DC volts function.
3. Set the Series 3700A to the 100 mV range.
4. If relative offset is needed, set the calibrator output to 0.00000 mVDC and allow the reading to
settle.
5. Enable the Series 3700A relative offset mode.
6. Source positive and negative full-scale and half-scale voltages for each of the ranges listed in the
table below. For each voltage setting, be sure that the reading is within stated limits.
