Agilent 34970A/34972A Data Acquisition / Switch Unit
Agilent 34970A/34972A Data Acquisition / Switch Unit
Agilent 34970A/34972A Data Acquisition / Switch Unit
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Chapter 4 Calibration Procedures<br />
Relay Verification<br />
Test 37:<br />
Test<br />
#<br />
Channel<br />
Configured<br />
Install the 34901A in slot 200 of the <strong>34970A</strong>/<strong>34972A</strong>. Select and<br />
configure Channel 21 as follows: DC current, 1 amp range, and 5½ digits.<br />
Enable reading monitoring by pressing on the selected channel (or<br />
use the ROUTe:MON command). Record the 4-wire ohms measurement<br />
from the external DMM in the following table.<br />
External DMM Ohmmeter Connections<br />
HI LO HI<br />
Sense<br />
LO<br />
Sense<br />
Measured Value<br />
Test<br />
Limit<br />
Relay<br />
Measured<br />
37 Ch 21 P4 P4 P5 P5 ________Ohms 2.00 K521<br />
Module Reference<br />
Tests 38 - 39:<br />
Open all channels on the module by performing a Factory Reset. Close<br />
Channel 21 (module in slot 200). Remove the 34901A from the <strong>34970A</strong>/<br />
<strong>34972A</strong> and do not reinstall it for the remaining tests. Using the external<br />
DMM, make a 4-wire ohms measurement between the L and I terminals<br />
on Channel 22. Record the measured value as Test 38 in the following<br />
table.<br />
4<br />
External DMM Ohmmeter Connections<br />
Test<br />
#<br />
Channel<br />
Closed<br />
HI LO HI<br />
Sense<br />
LO<br />
Sense<br />
Measured Value<br />
Test<br />
Limit<br />
Relay<br />
Measured<br />
38 Ch 21 Ch 22 I Ch 22 L Ch 22 I Ch 22 L ________Ohms — —<br />
39 Subtract (Test 38 - Test 5) ________Ohms 2.00 K524<br />
105
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