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Checking Electrical Signal Continuity and Electrode Isolation
It is recommended that you perform the Electrical Signal Continuity and Electrode Isolation test
procedure before first field use (see Service Procedure 3). While these tests were made at the
factory, there is the possibility a problem developed during shipping. Performing these tests on the
new implement allows you to get familiar with the process under ideal conditions. It is advised that
you perform this test after long periods of non-use and on a routine basis (every 40 hours of data
collection) to ensure you are obtaining reliable data. KEEP OHMMETER, TEST LOAD AND TEST
BOX WITH THE MACHINE AT ALL TIMES.
Proper Operating Depth
Begin field operation by lowering implement into soil. iScan module must be operated in level
position. For good electrical conductivity readings, all four electrodes must be in direct contact with
moist soil. A depth of 1.5-3" (3-6 cm) is recommended (Figure 1).
iScan module must be
operated level with soil
engaging components
contacting moist soil.
EC electrodes #1 and
#4 inject current into
the soil and #2 and #3
measure voltage drop.
Setting Operating Depth—front turbo coulter
Unless conditions are excessively wet, the front
coulter should be set approximately ½" (1 cm)
deeper than the other soil engaging components.
To adjust the coulter depth, loosen the pivot bolt and
the cam adjusting bolt. Rotate cam to raise and
lower coulter. Check depth relative to other
components and retighten both bolts securely.
Section 5: Field Operations
Figure 1
5-1
Optical module is built into
the soil runner/EC #3
Pivot bolt
Cam
adjustment
Figure 2
Pub# OM22-iScan EC-OM
Cam bolt
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