Relay Test Adapter Mounting - HP 4085M Operation Manual

Model 4085M
4-1 1 . RELAY TEST
4-1 2. The Relay Test checks all relayS on all the pin boards installed in the 4085A for
normal MAKE/BREAK operation. The check is performed by applying a dc voltage t'1 the
1 6075A Relay Test -Adapter and measuring the voltage obtained when a specified relay is
set to M AKE. If a faulty relay is detected, the pin board number and relay number will be
displayed and the test will stop. The test procedure is given belCiw.
0 ) Be sure the contacts of the 1 6075A are clean. Then m ount the 16075A .
securely atop the 4085A as shown in Figure 4-2. If the 1 6 075A is loose, or if
the contacts are dirty, poor contact with the m easurement pins will result.
The system may fail the test.
(2) Press softkey [ill (RELAY). The Relay Test will begin immediately. the
computer's screen w ill be
relays are operating correctly. The test takes about 1 . 5 m inutes.
(3) If a faulty relay is detected, an error m essage, along with the pin board
number, relay number, and a brief description of the fault, will appear on the
computer's screen, as shown in F igure 4-4. the Relay Test will stop when a
faulty relay is detected.
as
Once the Relay Test detects a faulty relay, it stops and cannot be
continued. Additional faulty relays may exist, however.
repairing the indicated faulty relay (as described in paragraphs 4-19
and 4-2 1 ), be sure to rerun the Relay Test to check for additional
faulty relays.
Tighten these pairs
Figure 4-2. Relay Test Adapter Mounting
shown in Figure 4-3. If no errors are detected, all
Note
.'.,
.. ' . .�
Section IV
After
16075A
40BSA
4-3