Figure 1-13 Connections For Model 7700 Resistance Verification (100Mω Range) - Keithley 2700 Service Manual

1-26 Performance Verification
7.
8.
9.
10.
11.
12.
Figure 1-13
Connections for Model 7700 resistance verification (100MΩ range)
CH1
Model 7700
CH5
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
Source the nominal full-scale resistance values for the 100Ω-10MΩ ranges summarized
in Table 1-13, and verify that the readings are within calculated limits.
Connect the Model 7700 CH1 and CH11 terminals to the calibrator as shown in
Figure 1-13.
Disable external sense on the calibrator.
Set the Model 2700 for the 100MΩ range.
Source a nominal 100MΩ resistance value, and verify that the reading is within calcu-
lated limits for the 100MΩ range.
Press the OPEN key to open Channel 1.
CH6
CH7 CH8 CH9 CH10
H L H L H L H L
INPUT
(V, 2 WIRE)
SENSE
(OHMS, 4 WIRE)
H L H L H L H L
CH17 CH18 CH19 CH20
Calibrator (Output 2-wire Resistance)
Output
HI
Output
LO
Note: Use shielded cables to minimize
noise. Disable calibrator external
sense mode.