HP 3457A Service Manual page 86

3457A
Operational Verification Tests
4-Wire Ohms Operational Verification Tests Cont'd
34570 3457A | 3457A 90 day limits 1 year Limits
Input Range | Set Up High Low High Low
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
Table 4-28. 4-Wire Ohms Gain Test Limits
Frequency Counter Operational Verification Tests
FREQUENCY
SOURCE
Figure 4-19, Frequency Counter Operational Verification Test Connections
4-88. Frequency Counter - Accuracy Test
4-89. Equipment Required. A Frequency Source capable of providing a 20 Hz (+ 01%) and a | MHz
(+ 003%) sine-wave signal is required for this procedure.
1, Set the HP 3457A to the Frequency Function (FREQ).
2. Set the Frequency Standard for a | volt, 20 Hz sine-wave output signal and connect it to the HI
and LO input terminals of the HP 3457A.
3. Use the Test Record to record the frequency readings at 20 Hz and | MHz.
4. If either of the readings are beyond the limits specified, the instrument should be calibrated.
Refer to Section V of this manual for calibration procedures.