User's Manual Part 2

GS550 UNDERHOOK
19
ChApTEr 6: mAiNTENANCE
Figure: Install the new antenna
3. Carefully re-thread, screw in and tighten the
white nylon hex bolt to secure the antenna in
place. Do not overtighten.
4. Verify that the sensor functions properly.
6.4 Load Cells
6.4a Underhook
LSI-Robway flat bar Load Cells are pre-calibrated
at the factory. No “zeroing” or other calibration is
required on installation. Each cell is heat treated to
age the aluminum and ensure stable readings for
many years. LSI-Robway Load Cells are calibrated
for 100% of their Safe Working Load (SWL).
LSI-Robway load pins, line riding tensiometers and
compression cells must be calibrated at installation
and every time thereafter the installation, the load
sensor or the transmitter is changed.
SAE J 159 4.2.1 recommends load indicating devices
should show not less than 100% of the actual load
and not more than 110% of the actual load.
6.4b Load Testing
LSI-Robway recommends testing the load cell
every year for accuracy.
White nylon hex bolt
TA011 Antenna
Sensor box
Antenna receptacle
hEAvy ShOCK mAy AFFECT LOAd
iNdiCATiON ACCurACy. iNSpECT ThE LOAd
CELL rEguLArLy FOr CLEArLy viSiBLE
dENTS Or SCrATChES. TEST ThE LOAd
iNdiCATiON iF COLLiSiON dAmAgE iS
viSiBLE.
CAUTION
6.4c Care
Battery.
Lithium batteries older than 18 months old (alkaline
batteries over 6 months old) should be changed at
the first available planned inspection even if there is
not yet a low battery warning. This will avoid costly
delays in the field.
Corrosion.
Verify that no corrosion is visible on the battery
holder inside the load cell transmitter. If some trace
of corrosion is visible, rub it off gently and put a
small amount of dielectric grease* on each battery
holder post to protect the contacts.
* Suggest Dow Corning dielectric grease No. 4.
Mechanical stresses.
Inspect the load cell sides for dents or heavy
scratches.
Seal.
If the cover has been removed it must be correctly
resealed with silicone based grease.
Antenna.
Small scratches on the antenna will not affect radio
communications. A heavy bending of the antenna
or bare sections on the wire may reduce the radio
efficiency.
A return of the unit to a external calibration facility
will ensure an accurate calibration. Facility must be
LSI-Robway approved.
Calibrations required on location should only be
performed by competent persons and reference
weights traceable to a recognized authority.