Open Lead Detection - Keithley 3700 Series User Manual

Series 3700 System Switch/Multimeter User's Manual
scan.create('4004, 4024')
-- Backplane channel 4911 and 4921 will be automatically
paired.
-- Scan will loop 10 times.
scan.scancount=10
-- Starts scan.
scan.execute(buf)
for x=1,buf.n do printbuffer(x,x,buf,
buf.relativetimestamps) end
-- Prints the reading and relative time from start of scan.
-- buf.timestamp includes date and real time.
-- Note that x,x prints reading and time vertically for
easy copy / paste to Excel.
channel.open('allslots')
endscript

Open lead detection

The Series 3700 has four methods to detect open lead conditions:
ISOUR open voltage
VMEAS open voltage
Calculated measurement
dmm.opendetector
The following figures contains open lead detection schematics for various
measurements.
3700S-900-01 Rev. C / July 2008
Section 5: Basic Digital Multimeter (DMM) Operation
5-45