Series 3700 System Switch/Multimeter Reference Manual
Section 10
:
Verification
Document Number: 3700S-901-01 Rev. A / August 2007
10-21
Verifying zeroes using a four-wire short
Check the zeroes of various testpoints while the four-wire is connected 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 and resistance zeroes:
1. Select the DC volts function.
2. Set the Series 3700 to the 100mV range.
3. Connect the four-wire short to the Series 3700 analog backplane connector and allow to
settle for 5 minutes. (Do Not Use REL.)
4. Verify the 100mV zero is within specification (see the 4-wire short applied resistance
verification table).
5. Set the Series 3700 to the 1V range.
6. Allow to settle for 5 minutes (do not use REL).
7. Verify the 1V zero is within specification (see the 4-wire short applied resistance verification
table).
Follow these steps to verify resistance using the 4-wire short:
1. With the four-wire short still applied, select the Series 3700 4-wire resistance function.
2. Select the SLOW integration rate with the
RATE
key.
3. Set the Series 3700 for the 1
range, and make sure the FILTER is on. Enable OC+ (offset-
compensated ohms). (Use OC+ for 1
and 10
range verification.)
4. Verify the 1
range zero is within specification (see the 4-wire short applied resistance
verification table).
5. Set the Series 3700 for the 10
range (make sure the FILTER is on and OC+ is still
enabled).
