D
OCUMENT
301900,
R
EVISION
D
70
E
PI
S
ENSOR
U
SER
G
UIDE
Testing Connector Assembly #2
You should also do a "buzzing out" test on this end of the cable, to make
sure you connected the proper wires to the proper solder cups (per the
schematic in Figure 30), and that no wires have gotten shorted in the
assembly process.
Check the resistance from the connector shell to the connector shell at the
other end of the cable. The resistance will vary depending on cable length,
but should be very low (<0.3
%
/ 100').
To do this test, use the pins in the assembled connector at the recorder end
as response conductors.
1. Set the DVM to measure resistance in the range of several hundred
ohms.
2. At the EpiSensor-end, connect one DVM lead to connector pin L
(top left in Figure 30). Then, with the other DVM lead, check that
all other pins in that connector are infinite with respect to pin L.
3. At the recorder end of the cable, have another technician take the
connector and use a test-lead jumper to connect connector pin L to
connector pin M.
4. Now the DVM at the EpiSensor-end should show that pin L is
connected to pin M (the DVM should measure < 2.5
%
per 100' of
cable. If it does, have the other technician remove the test jumper at
the recorder end.
5. Disconnect the DVM lead from connector pin L and, with the other
DVM lead still connected to pin M, confirm that it is infinite with
respect to all other connector pins.
You have now "buzzed out" the top two connections (L and M) shown top
left in Figure 30, for the two wires in the white-black pair.
Repeat Step 1 through Step 4, but test connector pins A and B and the two
wires in the green-black pair.
Follow Steps 1 through 4 for each pair of connector pins and wire-pairs in
the remaining five pairs of wires and 10 connections shown on the left side
of Figure 30.
With the exception of K, N, P and R,
check that all pins in the connector are
infinite with respect to the connector pin you are testing. Now check that
pins K, N, P and R are connected to one another and are infinite in respect
all other pins.
Note
: Do not proceed to the shield-to-shell testing until all the pairs of
insulated conductors have passed the four test steps above.
