Veris Technologies 3150 Soil EC Mapping System - Trouble-shooting User Manual
Page 4
Remove the signal cable from the EC Surveyor and connect it to the terminal on the test
box. If you have hard-wired the signal cable extension into the cab, making it difficult to
reach the implement with the cable end, you may want to purchase an extension cable
from Veris (part #12269). This cable attaches to the signal cable end and allows you to
position the Signal Test Box in close proximity to the coulter-electrodes.
Figure 2.2
Firmly press one lead of the ohmmeter to the #1 coulter blade edge (left hand, standing
behind the unit) and the other lead to the #1 terminal on the test box. Maintain firm
pressure on the ohmmeter lead touching the disk blade. A reading of less than 2 ohms is
normal. Rotate blade ¼ of a turn back and forth as you view the ohmmeter. Any jump in
the readings above 2 ohms indicates a problem.
Figure 2.3
Continue to check each coulter electrode in succession, left to right.
If any coulter electrode exhibits no continuity or resistance higher than 2 ohms, refer to
Procedure #3 Diagnosing EC Signal Problems.
Connect to coulter
blade
Ohmmeter
Connect one lead to Signal Test
Box terminal (corresponding to
each coulter)
Signal extension cable
(from implement)