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11. BALANCE CALIBRATION
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated – in compliance with the underlying physical
weighing principle – to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory).
This adjustment process must be carried out for the location in the factory). This
adjustment process must be carried out for the commissioning, after each change
of location as well as in case of fluctuating environment temperature. It is also
recommend to adjust the balance periodically during weighing operation in order to
obtain exact measured values.
To ensure high precision of weighing corrective factor in relation to standard mass
must be noted in the balance memory periodically – it is the balance calibration.
Calibration should be performed:
- Before the weighing,
- When long breaks are between following measure series
- When temperature inside the balance changes more than: 0,8° C.
Kind of calibration:
- Internal automatic calibration
* started if temperature changes
* started if the time changes
- Manual internal calibration
* initiated from the balance keyboard
- Calibration made with external weight
* with declared mass which cannot be modified.
In verified balances only automatic internal calibration and manual internal
calibration is accessible.
Perform the calibration when there is no load on the pan!
In case when there is load on the pan, display will indicate unload. It is
comment of unloading the pan. Calibration process can be stopped if it’s
necessary. Press then Esc/TARA key.
11.1. Balance with internal calibration
Process of calibration can be started automatically or manually.
Manual way of operation is to press three times F key. System of automatic
calibration will automatically perform calibration informing user about successive
stages.
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