HP 3457A - 4-36. 4-Wire Ohms Function - Gain Test; Frequency Counter Performance Tests

3457A
4-36. 4-Wire Ohms Function - Gain Test
4-Wire Ohms Performance Tests Cont’d
Performance Tests
4-37. Equipment Required. Resistance Standards of 30 Ohms (+ .004%), 300 Ohms ( .002%), 3 Kohms
(+ 001%) 30 Kohms (+ .001%), 300 Kohms (+ .001%), 3 Mohms (+ .001%) and 30 Mohms (+ .009%) are
required for this procedure.
1, Set the HP 3457A to the 4-Wire ohms function (OHMF) and the number of digits displayed (DIGITS
DISP) to six.
2. Connect the appropriate Resistance Standard to the HP 3457A front panel input terminals as shown
in Figure 4-7.
3. Use the Test Record to record the resistance readings for the 30 Ohm, 300 Ohm, 3 Kohm, 30 Kohm,
300 Kohm, 3 Mohm and 30 Mohm ranges.
4. If any of the readings are beyond the limits specified in Table 4-10 and on the Test Record, the in-
strument should be calibrated or repaired. Refer to Section V for calibration procedures.
5. Remove the Resistance Standard from the HP 3457A front panel input terminals.
3457A 34570 34578 90 day limits 1 year limits
Input Range Set Up High Low High Low
30 ohm 30 ohm OHMF 30.00530 ohm 29.99470 ohm 30.00560 ohm 29.99440 ohm
300 ohm 300 ohm OHMF 300.0170 ohm 299.9830 ohm 300.0200 ohm 299.9800 ohm
3 Kohm 3 Kohm| OHMF 3.000112 Kohm 2.999888 Kohm 3.000157 Kohm 2.999843 Kohm
30 Kohm 30 Kohm| OHMF 30.00112 Kohm 29.99888 Kohm 30.00157 Kohm 29.99844 Kohm
300 Kohm| 300 Kohm| OHMF 300.0128 Kohm 299.9872 Kohm 300.0158 Kohm 299.9842 Kohm
3 Mohm 3 Mohm| OHMF 3.000179 Mohm 2.999821 Mohm 3.000209 Mohm 2.999791 Mohm
30 Mohm 30 Mohm| OHMF 30.00833 Mohm 29.99167 Mohm 30.01283 Mohm 29.98717 Mohm
Table 4-10. 4-Wire Ohms Gain Test Limits
Frequency Counter Performance Tests
f :
© FREQUENCY
YP ||| SOURCE
|
© =
S
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Figure 4-8. Frequency Counter Performance Test Connections