Leveling; Equipotential Bonding; Checking The Weighing Platform - Mettler Toledo PBA439 Serie Manual Del Usuario

3.3 Leveling

Only a weighing platform which is aligned exactly horizontally supplies exact weighing results. The weighing
platform has to be leveled during the initial installation and whenever its location is changed.
1 Turn the adjustable feet of the weighing platform until the air
bubble of the spirit level is positioned in the inner circle.
2 Tighten the lock nuts of the adjustable feet.
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3.4 Equipotential Bonding

The equipotential bonding for the PBA439x/xx weighing
platforms is mounted in the factory. The wiring must be
installed by a professional electrician on customer site.
METTLER TOLEDO Service only has a monitoring and
consulting function here. Connect the equipotential
bonding (PA) of all devices (weighing platform and
weighing terminal) in accordance with the country-specific
regulations and standards. In the process, make sure that
all device housings are connected to the same potential
via the PA terminal.
Note
The equipment is protected against electric shock acc.
IEC60950, class II.

3.5 Checking the Weighing Platform

Function Check
1 Make sure that the weighing platform is connected to a
weighing terminal and that the weighing terminal is
switched on.
2 Make sure that the weighing platform is unloaded and
the display of the weighing terminal shows 0.
3 Load the weighing platform. The weighing terminal
must show a value different from 0.
4 Unload the weighing platform. The weighing terminal
must return to 0.
Verification Test
For a verification test refer to the user manual of the connected weighing terminal. If the verification seal is
broken, verification is no longer valid.
6 Installation and Operation​ ​
1 - Hexagonal lock nut, M4 KEPS
2 - Washer
3 - Base Frame
4 - Equipotential bonding terminal, torque 3.5 Nm
Order number of the equipotential
bonding kit 72237321
4
3
2
1