12
USER MANUAL
____________________________________________________________________________________________________________________
10. Start-up
Plug feeder into 230V power supply socket and feeder connector into 12V socket
at back of the balance.
After switching-on, the balance
performs automatic self-tests. All
tests
should
be
successfully
completed what is signalled with
mark.
Afterwards
the
balance
enters
automatically
into
internal
calibration mode, which is described
with details in next chapter. In
balances that are not legally verified,
calibration can be terminated using
CLR
key.
When internal calibration is finished,
the balance enters into normal
weighing
mode.
It is recommended before making measurements to wait until
internal temperature of balance stabilize. To accomplish that, the
balance should be turned on for more than 2 hours before
measurements. From the perspective of measurements accuracy
continuous balance operation is beneficial.
11. Internal calibration
The balance is equipped with internal calibration system, which general task is to
maintain required measurement accuracy on the balance.
Internal calibration is the process of putting internal weight on automatically by
balance mechanism and correcting accuracy in balance firmware. The correction is
necessary because of differences between values of gravitational acceleration in
the place where the balance was manufactured and in the place where it is
operated, as well as due to changes of balance level and temperature.
Internal calibration is performed in the following situations:
- when key is pressed,
-
after defined time interval (for legally verified balances - 2 hours),
- after temperature change (for legally verified balances – more than 2
o
C).
In legally verified balances time interval is set to 2 hours and defined temperature
change is 2
o
C. In not legally verified balances those values can be set as calibration
options. The reason of starting internal calibration is shown as an icon near weight
picture.
Max ... Min ... e= ... d= ..
0.000
g
0%
100%
model
INITIALIZATION
program version
Processor test
Reading
EEPROM
...
...
AUTOCALIBRATION .
Internal calibration :
please wait ...