Wiring The Test Fixture; Test 2-1: Closed Channel Resistance Test - Agilent Technologies 75000 C Series Service Manual

Wiring the Test
Fixture
Test 2-1:
Closed Channel
Resistance Test
Common to NO
Measurements
Chapter 2
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The performance verification tests have two parts: a closed channel resistance test of all
relay contacts (Test 2-1) and a DC isolation test (Test 2-2). These tests are sufficient to
determine that the module is operating within specifications. These tests are suitable for
incoming inspection, troubleshooting, and preventive maintenance.
A test fixture is required for the performance verification tests. Figure 2-1 shows
typical connections using an Agilent E1463A terminal module for the test fixture.
You may want to order an extra terminal module to use as a test fixture, so you
don't have to re-wire each time the tests are performed. The Agilent E1463A
terminal module part number is E1463-80011 (for modules with serial numbers
prior to 3126A01817, the terminal module part number is E1463-80001).
Figure 2-1. Agilent E1463A Test Fixture
This test verifies that all relay contacts meet the closed-channel resistance speci- fication
for the module. When making the Closed Channel Resistance Test, the NO and NC paths
relay contacts are tested independently. This test uses the test fixture (see Figure 2-1).
The Closed Channel resistance specification for each relay contact is 2.0 W
Make Hardware Connections
1.
•
Turn mainframe power OFF
•
Connect DMM leads as shown in Figure 2-2
.
Verification Tests 21