Performance Verification
1-13
1.8.5 Resistance verification
Resistance verification is performed by connecting accurate
resistance values to the instrument and verifying that Model
2001 resistance readings are within stated limits.
Follow the steps below to verify resistance measurement ac-
curacy.
CAUTION
Do not apply more than 1100V peak be-
tween INPUT HI and LO or more than
350V peak between SENSE HI and LO,
or instrument damage may occur.
20¾ - 200k¾ range verification
1. Turn on the Model 2001 and the calibrator, and allow a
one-hour warm-up period before making measure-
ments.
2. Set the calibrator for 4-wire resistance (external sense
on).
3. Using shielded 4-wire connections, connect the Model
2001 to the calibrator, as shown in Figure 1-6. Be sure
to connect calibrator HI and LO terminals to the Model
2001 HI and LO terminals (including SENSE HI and
LO) as shown.
4. Restore Model 2001 factory default conditions, as ex-
plained in paragraph 1.7.
5. Set operating modes as follows:
A. From normal display, press CONFIG then ¾4.
B. Select FILTER, then press ENTER.
C. Select AVERAGING, then press ENTER.
D. Using the cursor and range keys, set the averaging
parameter to 10 readings, then press ENTER.
E. Select OFFSETCOMP, then press ENTER.
F. Select ON, then press ENTER.
G. Press EXIT to return to normal display.
6. Set the calibrator to output 19.000¾, and allow the read-
ing to settle. Verify that the reading is within the limits
stated in Table 1-8.
NOTE
Resistance values available in the Model
5700A calibrator may be slightly different
than the stated nominal resistance values.
Calculated limits stated in Table 1-8
should be recalculated based on actual cal-
ibrator resistance values.
7. Set the calibrator output to 190.000¾, and allow the
reading to settle.
8. Verify that the reading is within the limits stated in Table
1-8. (NOTE: Recalculate limits if calibrator resistance is
not exactly as listed.)
9. Repeat steps 11 and 12 for the 2k¾ through 200k¾ rang-
es using the values listed in Table 1-8. NOTE: Turn off-
set compensation off when testing the 200k¾ range (see
step 5).
Table 1-8
Limits for resistance verification (20¾-200M¾ ranges)
2001 ¾ range
Applied
resistance
Reading limits
(1 year, 18° to 28°C)
20¾
200¾
2k¾
20k¾
200k¾
2M¾
20M¾
200M¾
19.0000¾
190.000¾
1.90000k¾
19.0000k¾
190.000k¾
1.90000M¾
19.0000M¾
100.000M¾
18.99849¾
to
19.00151¾
189.9880¾
to
190.0120¾
1.899897k¾
to
1.900103k¾
18.99897k¾
to
19.00103k¾
189.9820k¾
to
190.0180k¾
1.899687M¾
to
1.900313M¾
18.98281M¾
to
19.01719M¾
97.9800M¾
to
102.0200M¾
NOTES:
1.
Limits shown do not include calibrator uncertainty and are based on
absolute calibration values shown. Recalculate limits using Model
2001 specifications if calibrator resistance values differ from nomi-
nal values shown.
2.
Use 4-wire connections and function for 20¾-200k¾ ranges. Use 2-
wire connections and function for 2M¾-200M¾ ranges.
