Triner Scale RAVAS-310 - Manual (Page 19)

19
The potentiometers
with which we
calibrate the output of
the load cells, are
mechanical parts
therefore, higher risk
components Move the board and but pressure with fingers on the
potentiometers while looking at the display to see if it
reacts. Do not touch the contact itself.
Not linear Check if it is load cells
or indicator Load cells or indicator are very rarely the cause of this
problem. Easiest way to check is by changing the
indicator temporarily. If problem is not solved when
changing the indicator, the problem is the load cell,
cable or mechanics
Check cable Very rarely the cause. Maybe in a lift truck.
Instability With no load it
is most of the
time humidity,
bad connection
or component r
bad shield.
Check for humidity Check for water marks on the indicator board or load
cell connections (potentiometers).
Check the indicator. Sometimes the indicator will show a weight when the
load cells are disconnected. If you do this and the
indicator becomes more stable, it is most likely
elsewhere in the system.
Check visually for traces of oxidation. If found, heating
the solder contacts can solve the problem.
Check cables. In
warehouse and lift
truck the cable is
working all the time
when following the
lifting movement. It
may be worn or
damaged. Changing
temperatures and
chemicals have an
effect on the lifetime of
a cable. Bad connections will cause changes when moving the
scale.
Bend and move the cable briskly especially where the
cable is moving continuously when lifting. While doing
so, look at the display to see if it reacts to the
movements.
The potentiometers
with which we
calibrate the output of
the load cells are
mechanical parts and
are sensitive to
humidity, shocks and
vibration. Move the board and but pressure with fingers on the
potentiometers while looking at the display to see if it
reacts. Do not touch the contact itself.
Check the load cells. If connected independently to the indicator, it can be
checked which one is unstable and which one is not.
With load Check mechanics.
Function
error No reaction
when pushing
keys Check the touch panel Test can be done by making short cut on connection
of the touch panel to simulate a key being pressed.
Check for wear of broken contacts in the flat cable
going to the indicator board
Lock up Take out the battery pack and replace to see if it
starts up afterwards.