Keithley 2000-SCAN-20 Instruction Manual page 56

4. Turn on the multimeter and allow it to warm up for one hour before proceeding.
Select the Ω2W function and the 100Ω range on the multimeter.
5.
6. Temporarily connect a second set of output leads, identical in length and type to the leads
connected to the scanner card output, to the multimeter rear panel HI and LO INPUT
jacks. Be sure to select the rear panel terminals with the front panel INPUT switch.
7. Short the free ends of the temporary leads together and allow the reading to settle. Enable
the multimeter REL mode after settling, and leave REL enabled for the remainder of the
path resistance tests.
8. Disconnect the temporary leads from the multimeter, and connect the output leads from
the scanner card to the rear panel HI and LO INPUT jacks
9. Program the multimeter to close channel 1.
10. Note the resistance reading on the multimeter. Verify that the reading is <2Ω.
11. Repeat steps 9 and 10 for channels 2 through 20. Verify that the path resistance for each
channel is <2Ω.
12. After completing the tests, turn off the multimeter power, remove the scanner card, and
remove all jumper wires. (Leave HI and LO shorted for each channel if you intend to
perform contact potential tests.)
Figure 4-1
Connections for path resistance checks
Jumper HI and LO
of all 20 Channels
HI
Channel 1
LO
Channel 2-9
HI
Channel 10
LO
4-Pole
HI
Channel 11
LO
Channel 12-19
HI
Channel 20
LO
Model 2000-SCAN-20
Service Information
Input
HI
HI
OUT A
LO
Input
HI
OUT B
LO
2-Pole
(Figure 4-1).
DMM 2000-20
Rear Panel
LO
4-5