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Troubleshooting
If the Battery, Battery Cable and Display Cable are OK, the problem is either a failure of the
Display Unit or the GPR sensor. These units have no user-serviceable parts so they will have
to be returned to the vendor for inspection and repair.
13.3 System Overheating
The GPR system is designed to operate to a maximum internal temperature of 70 C or 158 F. In
situations of high ambient temperatures or long exposure to direct sun, this maximum internal
temperature may be exceeded and cause the system to fail.
If you suspect that the GPR sensor is overheating, shut it off and give it a chance to cool down in
a shady location before trying to run it again.
If the situation is such that the high temperatures or direct sun cannot be avoided, it may be a
good idea to put some sort of shade over the GPR sensor.
13.4 Display Unit Problem
If the Display Unit does not power up, check the battery power and all cable connection. If that
doesn't work, contact the manufacturer.
13.5 Wobbly Wheels
If, over time, a wheel becomes wobbly, the wheel nut will need to be manually tightened.
For the rear right wheel only (which is connected to the direct drive odometer), insert a large,
slotted screwdriver into the end of the axle (there's already a slot there for it) and use a large
wrench to slightly tighten the wheel nut. The nut only has to be turned slightly, 1/8th -1/16th of a
turn is usually enough. Spin the wheel to make sure it's still free and not too tight.
13.6 Creating a Test Line for Data Quality
After receiving the system and getting comfortable with its operation, one of the best ways of
detecting any problems is to collect a line of data at a convenient, easily accessible location.
The line does not have to be too long, but one screen is a good guide. This data line should be
saved electronically and perhaps plotted out on paper and dated. If there is a suspected
problem with the system, this test line could be collected and compared with earlier tests. When
comparing data, take into account weather and environmental conditions, which could skew the
comparisons slightly.
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