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Service Information
5.3
Performance verification
The following paragraphs discuss performance verifi-
cation procedures for the Model 7013, including chan-
nel resistance, offset current, contact potential, and
isolation.
CAUTION
Contamination will degrade the per-
formance of the switch card. To avoid
contamination, always grasp the card
by the side edges and shields. Do not
touch the connectors, and do not
touch the board surfaces or compo-
nents. On plugs and receptacles, do
not touch areas adjacent to the elec-
trical contacts.
Table 5-1
Verification equipment
Description
DMM
Electrometer w/voltage source
Sensitive Digital Voltmeter
Triax cable (unterminated)
Low thermal cable
(unterminated)
5-2
Model or part
Keithley Model 196
Keithley Model 617
Keithley Model 182
Keithley Model 7025
Keithley Model 1484
Failure of any performance verifica-
tion test may indicate that the switch
card is contaminated. See paragraph
5.2 to clean the card.
5.3.1 Environmental conditions
All verification measurements should be made at an
ambient temperature between 18° and 28°C, and at a
relative humidity of less than 70%.
5.3.2 Recommended equipment
Table 5-1 summarizes the equipment necessary for per-
formance verification, along with an application for
each unit.
Specifications
300 Ω ; 0.01%
10pA, 100pA; 1.6%
100V source; 0.2%
3mV; 60ppm
NOTE
Applications
Path resistance
Offset current, path isola-
tion
Contact potential
Offset current
Contact potential
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