Channel Resistance Tests - Keithley 7014 Manual

5.3.4 Channel resistance tests
Perform the following steps to verify that each contact
of every relay is closing properly and that the resis-
tance is within specification.
1. Turn off the Model 7001 if it is on.
2. Turn on the Model 196, and allow it to warm up for
one hour before making measurements.
3. Connect all input terminals of Bank A together to
form one common terminal, as shown in Figure 5-
2.
4.
Set the Model 196 to the 300R range and connect
the four test leads to the OHMS and OHMS SENSE
input jacks.
5. Short the four test leads together and zero the
Model 196. Leave zero enabled for the entire test.
6.
Connect OHMS HI and OHMS SENSE HI of the
Model 196 to the common terminal (jumper on
Bank A inputs). It is recommended that the physi-
cal connections be made at inputs 2 and 10 of Bank
A, as shown in Figure 5-2.
Scrv& Information
7. Connect OHMS LO and OHMS SENSE LO to the
HI (H) terminal of Bank A.
8. Install the Model 7014 in slot 1 (CARD 1) of the
Model 7001.
9.
Turn on the Model 7001 and program it to close
Channel 1!2 (Bank A, Input 2). Verify that the resis-
tance of this path is <IQ.
10. Open Channel 1!2 and close Channel 1!3 (Bank A,
Input 3). Verify that the resistance of this path is
<1 Q.
11. Using the basic procedure in steps 9 and 10, check
the resistance of Bank A HI (H) terminal paths for
Inputs4 through 10 (Channels 1!4 through l!lO).
12. Turn off the Model 7001 and move the OHMS LO
and OHMS SENSE LO test leads to the LO (L) ter-
minal of Bank A.
13. Repeat steps 9 through 11 to check the LO (I.) ter-
minal paths of BankA(Channels 1!2 through l!lO).
14. Repeat the basic procedure in steps 1 through 13
for Banks B through D (Channels 1!11 through
1!40).
Model 7014
Figure 5-2
Path resistance test connections
s-5