Keithley 7708 User Manual page 19

Figure 10
Connections for AC volts verification
CH1
H L H L H L
CH1 CH2 CH3
4. Set the Model 27xx for the 100mV range; make sure that REL is disabled.
5. Source 1kHz and 50kHz AC voltages for each of the ranges summarized in
Model 27xx readings fall within stated limits.
6. Press the OPEN key to open Channel 1.
Table 4
ACV reading limits
ACV range Applied AC voltage
100mV 100.0000mV
1V 1.000000V
10V 10.00000V
100V 100.0000V
750V 300.000V*
* If the 5725A amplifier is not available, change the 300V @ 50kHz step to 220V @ 50kHz. Reading limits for
220V @ 50kHz = 219.36 to 220.64V.
H L
H L
CH2
CH1
H L H L H L
H L H L H L H L H L H L
CH4 CH6 CH9 CH12
CH5 CH7 CH8 CH10 CH11
Model 7708
1kHz reading limits
(1 year, 18°C to 28°C)
99.910 to 100.090mV
0.99910 to 1.00090V
9.9910 to 10.0090V
99.910 to 100.090V
299.60 to 300.40V
Output
HI
Output
LO
H L H L
CH13 CH14
Table
50kHz reading limits
(1 year, 18°C to 28°C)
99.830 to 100.170mV
0.99830 to 1.00170V
9.98300 to 10.0170V
99.830 to 100.170V
299.27 to 300.73V
Amplifier (Connect to Calibrator)
Calibrator (Output AC Voltage)
Shielded
Cable
4, and make sure that the respective
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