Keithley 2010, Service Manual, Page: 20 / 134

Verifying AC voltage
Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from
the AC voltage calibrator to the Model 2010 inputs and verifying that the displayed readings fall
within specified ranges.
CAUTION Do not exceed 1000V peak between INPUT HI and INPUT LO, or 8
×
10
7
V•Hz input, because instrument damage may occur.
Follow these steps to verify AC voltage accuracy:
1. Connect the Model 2010 HI and LO INPUT jacks to the AC voltage calibrator as shown
in
Figure 1-2 .
2. Select the AC volts function by pressing the ACV key.
3. Set the Model 2010 for the 100mV range; make sure that REL is disabled.
4. Source 1kHz and 50kHz AC voltages for each of the ranges summarized in Table 1-3 ,
and make sure that the respective Model 2010 readings fall within stated limits.
Table 1-3
ACV reading limits
ACV
range
Applied
AC voltage
Reading limits
(1 year, 18°C–28°C)
1kHz 50kHz
100mV
1V
10V
100V
750V
100.0000mV
1.000000V
10.00000V
100.0000V
700.000V*
99.910 to 100.090mV
0.99910 to 1.00090V
9.9910 to 10.0090V
99.910 to 100.090V
699.36 to 700.64V 99.830 to 100.170mV
0.99830 to 1.00170V
9.98300 to 10.0170V
99.830 to 100.170V
698.79 to 701.21V
*If the 5725A amplifier is not available, change the 700V at 50kHz step to 220V at 50kHz.
(Reading limits for 220V at 50kHz = 219.361 to 220.639V).
2000 MULTIMETER
!
R
5700A Calibrator (Output AC Voltage)
5725 Amplifier (Connect to calibrator)
Input HI
Output HI
Input
LO
Output
LO
Shielded cable
Model 2010
Note: 5725 Amplifier required only
for 700V, 50kHz output.
Figure 1-2
Connections for AC
volts verification
Performance Verification 1-7