Veris-technologies Quad 2800 Soil EC Mapping System - Operating Instr Manuel d'utilisateur télécharger pdf (Page 27)

OM17-Quad2800

6-5

Disk Electrode Functions-

Each disk electrode on the implement is part of a pair, and each pair has a distinct function.

a) Disks 2 & 5 are the “charged” disks that inject the voltage into the soil.

b) Disks 3 & 4 are the “Shallow EC” receptors.

c) Disks 1 & 6 are the “Deep EC” receptors

If the continuity ohm test indicates a problem on a channel, you will need to determine where the

interruption is located. Listed below are detailed instructions on how to determine exactly where a

continuity or isolation problem is located:

A. Testing Cable and Wiring continuity:

1. Once a high resistance reading on a channel is confirmed, determine whether the problem

is in the wiring or in the disk-electrode. To test all cable and wiring, place one ohmmeter

lead in the Test Box terminal pin for that channel and the other on the corresponding disk

wire connector bolt. Repeat process on all disk-electrodes. If there is a broken wire inside

the insulation, it may be difficult to detect without flexing the wires during this test.

Figure 3.2a and 3.2b Testing cable at disk electrode #2

2. If you see <2 ohms on all, test the disk electrodes as explained in B below.

3. If you see a > 2ohms reading on any channel, you will need to determine whether problem

is in extension cable (cable from implement to EC Surveyor) or in the wiring harness (cables

attached to implement. Visually inspect the wiring harness and cable extension for damage.

If a visual inspection doesn’t reveal a problem, you will need to test continuity of the wiring

harness and cable by ohming these cables out individually. Disconnect signal extension

cable from implement and insert ohmmeter leads into sockets as shown below.

Connect one lead to test

box terminal and other

lead to corresponding

disk wire connector bolt

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Veris-technologies Quad 2800 Soil EC Mapping System - Operating Instr Manuel d'utilisateur Page 27