Recommended Equipment; Path Resistance Tests - Keithley 2000-SCAN-20 Instruction Manual

4-4 Service Information

Recommended equipment

Table 4-1
application for each item.
Table 4-1
Recommended verification equipment
Description
Multimeter
Electrometer with voltage
source
Sensitive Digital Voltmeter
Triax cable (unterminated)
Low-thermal cable
#22AWG solid copper wire
#22AWG Teflon-insulated
stranded wire
Triax adapter (3-slot male to
2-lug female)

Path resistance tests

Perform the following steps to verify that the path resistance of each channel is within the
specified values.
NOTE
1.
NOTE
2.
3.
summarizes the equipment necessary for performance verification and the
Model/part
Keithley 2000-20
Keithley 6517A
Keithley 182
Keithley 7025
Keithley 1484
—
—
Keithley 6171
To perform this test, you must custom-wire a cable to connect to the scanner card
connections.
Connect the HI and LO inputs of all 20 channels together to make one common input
using #22AWG solid copper jumper wires
Make sure all jumper wires are clean and free of oxides.
Connect the output cables to OUT A HI and LO as shown in
With the power off, install the scanner card in a Model 2000-20 Multimeter.
Specifications Application
100Ω; 100ppm of Control card, measure path resistance
reading; 40ppm of
range
20pA, 200pA; 1.0% Path isolation
100V source; 0.15%
3mV; 60ppm Contact potential
— Path isolation
— Contact potential
— Path resistance
— Path isolation
— Path isolation
(Figure 4-1).
Figure 4-1.