Keithley 2002, Calibration Manual, Page: 17 / 114

Performance Verification
1-6
1.8.2 AC volts verification
AC voltage accuracy is checked by applying accurate AC
voltages at specific frequencies from an AC calibration
source and then verifying that each Model 2002 AC voltage
reading falls within the specified range. The two ACV verifi-
cation procedures that follow include:
• Normal Mode
• Low-frequency Mode
CAUTION
Do not exceed 1100V peak between IN-
PUT HI and INPUT LO, or 2
×
10
7
V•Hz input, or instrument damage
may occur.
Normal mode
1. Turn on the Model 2002, calibrator, and amplifier, and
allow a one-hour warm-up period before making
measurements.
2. Connect the Model 2002 to the calibrator, as shown in
Figure 1-2. Be sure to connect amplifier HI to Model
2002 INPUT HI and amplifier LO to Model 2002
INPUT LO as shown. Connect the power amplifier to
the calibrator using the appropriate connector on the
rear of the calibrator.
3. Restore Model 2002 factory default conditions, as ex-
plained in paragraph 1.7.
4. Select the ACV function and the 200mV range on the
Model 2002, and make sure that REL is disabled.
NOTE
Do not use REL to null offsets when per-
forming AC volts tests. Also, do not enable
the filter.
5. Set the calibrator output to 190.000mVAC at a fre-
quency of 100Hz, and allow the reading to settle.
6. Verify that the Model 2002 reading is within the limits
summarized in Table 1-3.
7. Repeat steps 5 and 6 for 190mVAC at the remaining fre-
quencies listed in Table 1-3 (except 2MHz). Verify that
instrument readings fall within the required limits listed
in the table.
8. Repeat steps 5 through 7 for the 2V, 20V, 200V, and
750VAC ranges using the input voltages and limits
stated in Table 1-3.
9. Connect the Model 2002 to the wideband calibrator out-
put (see Figure 1-3).
10. Set the calibrator output to 190.000mV at a frequency of
2MHz.
11. Verify that the reading is within the limits shown in
Table 1-3.
12. Repeat steps 10 and 11 for 1.90000V input on the 2V
range.
CAUTION
Do not attempt to test the 20V–1000V
ranges at 2MHz.