Switch Card Connections; Channel Resistance Tests - Keithley 7013-S Instruction Manual

5.3.3 Switch card connections

The following information summarizes methods that
can be used to connect test instrumentation to the two
connector cards. Detailed connection information is
provided in Section 3.
Model 7013-S  Instrumentation can be hard-wired
directly to the screw terminals of the connector card.
Jumper wires should be kept as short as possible.
Model 7013-C  One method to make instrument
connections to the switch card is to hard-wire a 96-pin
female DIN connector and then mate it to the
connector on the Model 7013-C. Shorting connections
can also be done at the connector. The connector in the
Model 7011-KIT-R connection kit (see Table 3-1) can be
used for this purpose. Pin identification for the multi-
pin connector for the relay card is provided by Figure
3-4.
CAUTION
After making solder connections to a
connector, remove solder flux as
explained in paragraph 5.2. Failure to
clean the solder connections could
result in degraded performance, pre-
venting the card from passing verifi-
cation tests.
Before pre-wiring any connectors plugs, study the fol-
lowing test procedures to fully understand the connec-
tion requirements.

5.3.4 Channel resistance tests

Referring to Figure 5-1, perform the following steps to
verify that each contact of every relay is closing prop-
erly and that the resistance is within specification.
1. Turn the Model 7001 off if it is on.
2. Set the Model 196 to the 300 Ω range and connect
four test leads to the OHMS and OHMS SENSE
input.
3. Short the four test leads together and zero the
Model 196. Leave zero enabled for the entire test.
4. Connect OHMS HI and OHMS SENSE HI of the
Model 196 to the input (IN) high (H) terminal of
Channel 1 as shown in Figure 5-1A.
5. Connect OHMS LO and OHMS SENSE LO to the
output (OUT) high (H) terminal of Channel 1.
6. With the card installed in slot 1 (CARD 1) of the
mainframe, turn on the Model 7001 and program it
to close channel 1!1 (Slot 1, Channel 1), and verify
that the resistance of this channel is <1 Ω .
7. Turn off the Model 7001 and connect OHMS HI
and OHMS SENSE HI of the Model 196 to the
input (IN) low (L) terminal of Channel 1 as shown
in Figure 5-1B.
8. Connect OHMS LO and OHMS SENSE LO to the
output (OUT) low (L) terminal of Channel 1.
9. With the card installed in slot 1 (CARD 1) of the
mainframe, turn on the Model 7001 and program it
to close channel 1!1 (Slot 1, Channel 1), and verify
that the resistance of this channel is <1 Ω .
10. Repeat the basic procedure of steps 1 through 9 to
test the rest of the channels of the Model 7013 relay
switch card. Remember to close the channel that
the Model 196 is connected to.
Service Information
5-3