| Problem |
Possible cause
|
Common solutions
|
Display is blank
No turn on test |
Mains power is turned off.
Power supply not plugged in
Power supply faulty
Internal battery not charged
Display turned off |
Check power is going to the
scale and switch is on.
Verify the voltage going to the scale matches the
power supply labels on the power module or scale.
|
Display blank after turn
on test
|
Pan not installed
Unstable weight
|
Check the pans are installed
correctly.
Try turning the scale on again. |
Error message
Display is locked |
Load cell damaged
Mechanics damaged |
|
| OL or FULL appears on display
|
Maximum capacity exceeded
Load Cell or mechanics damaged
Power supply faulty |
Check the pans are installed
correctly.
Try turning the scale on again. |
| UL or NULL displayed |
Weight on scale below permissible
limit
Pan has been removed
Pan support not seated properly
Power supply faulty
Load Cell or mechanics damaged |
Check the pans are installed
correctly.
Try pressing Zero key.
Try turning the scale on again. |
Display is unstable
|
Sample is moving (animal weighing)
Vibrations through table
Temperature changed dramatically
Power supply faulty |
Verify the scale is in a acceptable
location and on a good table.
Verify the power supply is correct for the scale.
|
| Weight value incorrect |
Recalibrate
Linearity error, set Linearity
Unit calibrated with inaccurate weight
Balance not level
Obstruction between sample and cover
Wrong unit of weight displayed |
Calibrate again, paying special
attention to the mass used, the stability of the
scale, and the weighing units required.
If linearity can be set by the user it will be described
in the user manual.
Check pan is installed correctly.
Verify installation is acceptable. |
| Cannot use Full Capacity
|
Over load Stops hitting pan
support or hitting bottom of load cell
Shipping screw not removed if applicable
Electronic problem on A/D
Parameters set incorrectly
Load Cell or mechanics Damaged |
Look for obstruction under
pan, shipping screws, and verify pan installation.
Check the weighing units used. |
| Not Linear |
Overload stops hitting too
soon
Load cell or mechanics damaged
A/D damaged |
Look for obstruction under
pan, shipping screws, and verify pan installation.
If linearity can be set by the user it will be described
in the user manual. |
| Off Center Loading error |
Adjust mechanics
Overload Stops not correct
Load Cell damaged |
Look for obstruction under
pan, shipping screws, and verify pan installation.
|
| Battery will not charge |
Mains voltage not present
or too low
Charging circuit failure
Battery Failure |
Verify the batteries are rechargeable
types. Some scale use non-rechargeable batteries
only.
Check power supply voltage is correct. |
