System Switch/Multimeter User's Manual Section 5:
Basic Digital Multimeter (DMM) Operation
-900-01 Rev. A / August 2007 5-
Internal
DMM
Comm.
(msec)
-10k
-
1. For 10Mand 100M, V
measurement
is made on Input HI. Input Sense HI is unused.
2. Default condition for 4-wire is dmm.opendetector=dmm.ON.
3. For dmm.drycircuit=dmm.ON, I
OPENLEAD
is disable, but print(dmm.opendetector) returns 1.0.
4. Additional cable and 3700 card capacitance can increase settle times, resulting additional
measurement uncertainty. Keithley Instruments recommend the use of Teflon or other low-
dielectric absorption wire insulation for these measurements.
Four-wire dry-circuit open lead detection
The Series 3700 dry-circuit resistance measurement circuitry was designed for low power, low
glitch, and low open voltage applications such as GMRR head testing and air bag / squib test
that require low energy resistance sourcing. For this reason, dmm.opendetecor = dmm.ON is
disabled when dmm.drycircuit = dmm.ON. The I
OPENLEAD
current pulse would exceed the dry-circuit
voltage application.