Figure 1-9 Connections For Model 7700 Ac Volts Verification; Verifying Ac Voltage - Keithley 2700 Service Manual

1-20 Performance Verification

Verifying AC voltage

Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from
the AC voltage calibrator to the Model 7700 inputs and verifying that the displayed readings
fall within specified ranges.
CAUTION
Follow these steps to verify AC voltage accuracy:
1.
Figure 1-9
Connections for Model 7700 AC volts verification
CH1
CH5
CH6
INPUT SENSE CH1 CH2 CH3 CH4
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
Model 7700
Do not exceed 300V RMS between plug-in module INPUT H and L termi-
nals or between adjacent channels, or 8 × 10
ment damage may occur.
Connect the Model 7700 CH1 H and L INPUT terminals to the AC voltage calibrator as
shown in Figure 1-9.
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
Amplifier (Connect to calibrator)
Output HI
Calibrator (Output AC Voltage)
Output
Shielded
LO
Cable
7
V•Hz input, because instru-