Keithley 7076 Instruction Manual page 58

SECTION 4
SmiceInfomation
Qure 4-6. Path Isolation Testing (Guarded)
11. On the Model 617, disable zero check and press OP-
ERATE to source +lOOV.
12. AfterallowingthereadingontheModel617tosettle,
verify that it is >lOGQ. This measurement is theleak-
age resistance (isolation) between ROW A, COL-
UMN 1 and ROW B, COLUMN 2.
13. Place the Model 617 in standby and enable zero
check.
14. Turn off the Model 707.
15. Disconnect the Model 617 from ROWS A and B, and,
in a similar manner, reconnect it to ROWS B and C
(picoammeter high and voltage source low to ROW
B, and voltage source high and low to ROW Cl.
16. Turn on the Model 707 and program it to close
crosspoints 82 and C3.
17. On the Model 617, disable zero check and press OP-
ERATE to source +loOV.
18. AfterallowingthereadingontheModel617tosettle,
verify that it is >lOGR.
19. Using Table 4-2 as a guide, repeat the basic proce-
dure of steps 13 through 18 for the rest of the path
pairs (starting with test #3).
4-8