Table; Recommended Equipment; Scanner Card Connections; Path Resistance Tests - Keithley 2000-Scan 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

Scanner card connections

Jumper wires or connecting cables can simply be hard-wired directly to the screw terminals
of the Model 2000-SCAN. Detailed connection information is provided in

Path resistance tests

Perform the following steps to verify that the path resistance of each channel is with specified
values.
1.
NOTE
2.
3.
4.
5.
6.
7.
summarizes the equipment necessary for performance verification, along with an
Model/part
Keithley 2001
Keithley 617
Keithley 182
Keithley 7025
Keithley 1484
—
—
Connect the HI and LO terminals of all 10 channel inputs together to make one common
terminal using #22AWG solid copper jumper wires (see
Make sure that 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 the Model 2001 Multimeter.
Turn on the Model 2001, and allow it to warm up for one hour before proceeding.
Select the Ω2W function and the 20Ω range on the Model 2001.
Temporarily connect a second set of output leads, identical in length and type to the leads
connected to the scanner card output, to the Model 2001 rear panel HI and LO INPUT
jacks. Be sure to select the rear panel terminals with the front panel INPUT switch.
Short the free ends of the temporary leads together, and allow the reading to settle.
Enable the Model 2001 REL mode after settling, and leave REL enabled for the
remainder of the path resistance tests.
Specifications Application
20Ω; 72ppm Control card, measure path resistance
10pA, 100pA; 1.6% Path isolation
100V source; 0.2%
3mV; 60ppm Contact potential
— Path isolation
— Contact potential
— Path resistance
— Path isolation
Section 2.
Figure 4-1).
Figure 4-1.