Procedure 8.3. Phase II: Locating a Faulty Branch in the Field
1. Measure in Junction 1 (J1.)
• If you get no readings from either branch, the problem is on the part of the two-wire leading back to
the Ranger Converter 3000 - perform a binary search (see procedure below) on this part of the
cable.
• If your readings on one of the branches are the same as when measuring at the controller (This is
the first thing you do when troubleshooting the two-wire you move on further out one branch at a
time, measuring in every fork you meet (J2, J3, J4 etc.) until you locate the faulty branch).
Important
If you reach a branch that is looped back to the two-wire elsewhere, make sure to open
the loop before measuring, or you won't detect the faulty branch.
• If you have a station attached to the junction itself, make sure you measure that as well, as the station
and not the two-wire could be the problem.
• If you get excessive readings on both branches after the junction but they are significantly lower than
at the controller, you have problems on the two-wire on both the section from the controller to the
junction, and further out as well. Detach the junction and start by finding the problem on the section
from the controller - then attach the junction again and work on each branch.
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