Figure 1-13 Connections For Model 7700 Resistance Verification (1 To 10M Ranges); Figure 1-14 Connections For Model 7700 Resistance Verification (100M Range) - Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual
Figure 1-13
Connections for Model 7700 resistance verification (1 to 10M ranges)
CH1
Model 7700
CH5 CH6
CH3 CH4
INPUT SENSE CH1 CH2
H L H L H L H L
H L H L H L H L
CH7
H L H L H L H L
H L H L H L H L
CH17 CH18 CH19 CH20
H L H L H L H L H L H L H L H L
CH21 CH22 CH11 CH12 CH13 CH14 CH15 CH16
CH11
7. Source the nominal full-scale resistance values for the 1-10M ranges summa-
rized in
8. Connect the Model 7700 CH1 and CH11 terminals to the calibrator as shown in
Figure
9. Disable external sense on the calibrator.
10. Set the Model 2750 for the 100M range.
11. Source a nominal 100M resistance value, and verify that the reading is within
calculated limits for the 100M range.
12. Press the OPEN key to open Channel 1.
Figure 1-14
Connections for Model 7700 resistance verification (100M range)
CH1
Model 7700
CH5 CH6
CH3 CH4
INPUT SENSE CH1 CH2
H L H L H L H L
H L H L H L H L
H L H L H L H L H L H L H L H L
CH21 CH22 CH11 CH12 CH13 CH14 CH15 CH16
CH11
CH8 CH9 CH10
Output
INPUT
(V, 2 WIRE)
SENSE
(OHMS, 4 WIRE)
Output
Table 1-14, and verify that the readings are within calculated limits.
1-14.
CH7 CH8 CH9 CH10
H L H L H L H L
Output
INPUT
(V, 2 WIRE)
SENSE
(OHMS, 4 WIRE)
H L H L H L H L Output
CH17 CH18 CH19 CH20
Performance Verification
Sense HI
Resistance Calibrator
HI
LO
Sense LO
Note: Use shielded, low-thermal cables
to minimize noise. Enable or disable
calibrator external sense as indicated
in procedure.
Calibrator (Output 2-wire Resistance)
HI
LO
Note: Use shielded cables to minimize
noise. Disable calibrator external
sense mode.
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