Keithley 2002, Calibration Manual

Page: 20 / 114

Performance Verification
1-9
Low-frequency 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 the 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
explained 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. Select the low-frequency mode as follows:
A. Press CONFIG ACV, select AC-TYPE, then press
ENTER.
B. Select LOW-FREQ-RMS, then press ENTER.
C. Press EXIT as required to return to normal display.
6. Set the calibrator output to 190.000mVAC at a fre-
quency of 10Hz, and allow the reading to settle.
7. Verify that the Model 2002 reading is within the limits
summarized in Table 1-4.
8. Repeat steps 6 and 7 for 190mVAC at the remaining fre-
quencies listed in the table.
9. Repeat steps 6 through 8 for the 2V, 20V, 200V, and
750VAC ranges, using the input voltages and limits
stated in Table 1-4.
Table 1-4
Limits for low-frequency mode AC voltage verification
2002 ACV
range
Applied
voltage
Reading limits (1 year, 18°C to 28°C)
10Hz 50Hz 100Hz
200mV 190.000mV 189.837mV
to
190.163mV
189.904mV
to
190.097mV
189.923mV
to
190.077mV
2V 1.90000V 1.89875V
to
1.90125V
1.89923V
to
1.90078V
1.89942V
to
1.90058V
20V 19.0000V 18.9837V
to
19.0163V
18.9904V
to
19.0097V
18.9913V
to
19.0087V
200V 190.000V 189.849V
to
190.151V
189.906V
to
190.094V
189.906V
to
190.094V
750V 750.00V * 749.09V
to
750.91V
749.09V
to
750.91V
* Recommended calibrator/amplifier cannot source this voltage/frequency.
Notes:
1. Specifications above 100Hz are the same as normal mode.
2. Limits shown include total absolute uncertainty of recommended calibrator (see Table 1-1).