Keithley 2002, Руководство по калибровке

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Performance Verification
1-10
AC peak 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 the 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 the Model 2002 factory default conditions.
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. Use AC coupling
for 5kHz-1MHz tests. Use AC+DC cou-
pling for 20Hz tests. (Use CONFIG-ACV
to set up coupling).
5. Select the AC peak and filter modes as follows:
A. Press CONFIG then ACV, select AC-TYPE, then
press ENTER.
B. Select PEAK, then press ENTER.
C. Select FILTER, then press ENTER.
D. Select AVERAGING, then press ENTER.
E. Using the cursor and range keys, set the averaging
parameter to 10 readings, then press ENTER.
F. Press EXIT as necessary to return to normal display.
G. If the FLT annunciator is off, press FILTER to
enable the filter.
6. Set the calibrator output to 100.000mVAC at a fre-
quency of 5kHz, and allow the reading to settle.
7. Verify that the Model 2002 reading is within the limits
summarized in Table 1-5.
8. Repeat steps 6 and 7 for 100mVAC 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 1-6.
CAUTION
Do not apply more than 400V at 50kHz,
80V at 250kHz, 40V at 500kHz, or 20V
at 1MHz, or instrument damage may
occur.
10. Set input coupling to AC+DC, then repeat the procedure
for a 20Hz input signal.
Table 1-5
Limits for AC peak voltage verification
2002
ACV
range
Applied
voltage*
Allowable readings (1 year, 18°C to 28°C)
20Hz† 5kHz 25kHz 50kHz 100kHz 250kHz 500kHz 750kHz 1MHz
200mV 100mV 139.9mV
to
142.9mV
139.9mV
to
142.9mV
139.9mV
to
143.0mV
139.8mV
to
143.0mV
139.7mV
to
143.2mV
138.6mV
to
144.2mV
136.5mV
to
146.4mV
132.2mV
to
150.6mV
127.3mV
to
155.5mV
2V 1V 1.407V
to
1.421V
1.407V
to
1.421V
1.407V
to
1.422V
1.406V
to
1.422V
1.405V
to
1.424V
1.394V
to
1.434V
1.373V
to
1.456V
1.330V
to
1.498V
1.281V
to
1.547V
20V 10V 13.99V
to
14.30V
13.99V
to
14.30V
13.98V
to
14.30V
13.98V
to
14.31V
13.97V
to
14.32V
13.86V
to
14.42V
13.65V
to
14.64V
13.22V
to
15.06V
12.73V
to
15.55V
200V 100V 140.7V
to
142.2V
140.7V
to
142.2V
140.6V
to
142.2V
140.6V
to
142.3V
140.5V
to
142.4V
** ** ** **
750V 500V — 701.3V
to
712.9V
701.0V
to
713.2V
** ** ** ** ** **
* * Calibrator voltage is given as an RMS value. Model 2002 reading limits are peak AC values.
** CAUTION: Do not apply more than 2
×
10
7
V•Hz.
† Use AC+DC input coupling for 20Hz tests only. (Use CONFIG-ACV to set coupling.)
NOTE: Limits shown include uncertainty of recommended calibrator.