Keithley 2701, Service Manual

Page: 41 / 168

Model 2701 Service Manual Performance Verification 1-27
8. Connect the Model 7700 CH1 and CH11 terminals to the calibrator as shown in
Figure 1-13 .
9. Disable external sense on the calibrator.
10. Set the Model 2701 for the 100M
Ω
range.
11. Source a nominal 100M
Ω
resistance value and verify that the reading is within calcu-
lated limits for the 100M
Ω
range.
12. Press the OPEN key to open Channel 1.
Figure 1-13
Connections for Model 7700 resistance verification (100M
Ω
range)
H L H L
AMPS
H L H L H L H L H L H L
LO
CH21 CH22 CH11 CH12 CH13 CH14 CH15 CH16
H L H L H L H L
CH17 CH18 CH19 CH20
SENSE
(OHMS, 4 WIRE)
INPUT
(V, 2 WIRE)
H L H L H L H L
CH7 CH8 CH9 CH10
H L H L H L H L
H L H L H L H L
INPUT SENSE CH1 CH2
CH3 CH4
CH5 CH6
CH1
CH11
Output
HI
Output
LO
Calibrator (Output 2-wire Resistance)
Note: Use shielded cables to minimize
noise. Disable calibrator external
sense mode.
Model 7700