LW Measurements MRB 2500 - Manual (Page 15)

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3.5 Checking the mains voltage
The following Safety recommendations must be observed when connecting
the weighing machine to the mains:
The weighing machine may only be operated with the power adapter supplied.
Check before connecting the power adapter to the mains supply, that the
operating voltage stated on the power adapter agrees with the local mains
voltage.
If the operating voltage is not the same as the mains voltage, the power
adapter must, on no account, be connected to the mains supply. Contact
customer service.
3.6 Calibration of the weighing machine
Since the Earth’s gravity is not the same everywhere, each weighing machine
must be adjusted to compensate for the gravity differences at each location in
accordance with the underlying physical weighing principles. This adjustment
process, known as calibration and must be carried out on initial installation and
after each subsequent relocation.
In order to ensure exact measurements, it is recommended that the balance
should be calibrated regularly using a known external calibration weight (see
Section 5 below).
4 Working with the application menu
4.1 Function settings
To enter the function setting mode, press the ON/OFF key to turn the power
off. Then press and hold the ZERO key and then press the ON/OFF key again.
The display will show A_ON or A_OFF.