Testing Coulter-Electrode Isolation - Veris 3150 MSP3 Operating Instructions Manual

hubcap
commutator
coulter
spindle
C. Testing Coulter-Electrode isolation
If continuity tests show no excessive resistance on any channel, yet erratic soil EC readings
continue, or if EC readings do not drop to –1 when unit is out of the soil, it is possible that the
channels are not isolated. This could be the result of a pinched wiring cable, causing channels to
short out. Or, one of the coulter-electrodes is no longer insulated properly from the frame or
adjacent coulter-electrodes.
1. If EC readings do not drop to –1 when unit is raised,
disconnect signal cable extension from implement. If
readings don't drop to –1, the problem is with the signal cable
extension. If readings show -1, re-insert the signal cable
extension into the implement. Disconnect the sure-seal
terminal connector wire from each coulter electrode. If
readings don't drop to –1, the problem is with the wiring
harness. If this is the case, you should replace the wiring
harness. If readings do drop, re-insert the signal cable
extension into the implement. The problem is with one or
more of the coulter-electrodes. Proceed as follows:
Figure 4.5
6-10
Figure 4.6
Pub. # OM20-MSP3-3D