Service manual

Performance Verification Tests
The procedures in this section are used to test the multiplexer’s electrical
performance using the specifications as the performance standards.
There are two performance verification tests for the relay multiplexers:
Test 2-1: Closed-Channel Resistance Test, and Test 2-2: DC Isolation Test.
These tests are suitable for incoming inspection, troubleshooting, and
preventive maintenance.
Wiring the Test
Fixture
A test fixture is required for the Performance Verification Tests. Figure 2-1
shows typical connections using a terminal module (aka "terminal block")
for the test fixture. You may want to order an extra terminal module to use
as a test fixture so that you don’t have to re-wire each time the tests are
performed. The E1345A terminal module may be used to test the
E1343A/45A/55A and 56A. The terminal module part number is
E1345-80001. The E1347A terminal module may be used to test the
E1344A and 47A. The terminal module part number is E1347-80001.
However, in most cases the E1345-80001 is adequate for testing any or all
of the relay multiplexer component modules.
Figure 2-1. Typical Test Fixture Connections
Chapter 2 Verification Tests 23