User manual

Test 2-3: DC Isolation Test
This test verifies that sufficient DC isolation exists between various points
on the relay multiplexer. The DMM used should be capable of measuring
up to at least 1 G
Ω. If the DMM indicates an overload, record the reading
as ">R
max
", where R
max
is the highest resistance that the DMM can
measure. If the DMM is an Agilent 3458A, for example, the reading should
be written as ">1.2 G
Ω".
High to Low 1. Hardware Connections
2. Equipment Setup
• Set DMM to: 2-wire ohms, 1 GΩ range.
• Send *RST to the multiplexer to open all channel relay contacts.
3. DC Isolation Reading
• Trigger the DMM and record the reading.
Figure 2-5. High to Low Isolation
28 Verification Tests Agilent E1460A Service Manual