Installation And Operation; Checking The Location; Connecting The Weighing Platform To The Weighing Terminal - Mettler Toledo PBA639 Serie Benutzerhandbuch

3 Installation and Operation

3.1 Checking the Location

The correct location is crucial for the accuracy of the weighing results.
1 Ensure that the location of the weighing platform is
stable, vibration-free and horizontal.
2 The surface must be able to bear the weighing platform
under maximum load at the points of support.
3 Observe the following environmental conditions:
No direct sunshine
No strong draught or vibration
No excessive temperature fluctuations
Temperature range -10 °C to +40 °C / 14 °F to 104 °F

3.2 Connecting the Weighing Platform to the Weighing Terminal

The PBA639(x/xx) weighing platforms are designed for use with analog METTLER TOLEDO weighing terminals.
1 Insert the weighing platform cable through the cable gland into the weighing terminal.
2 Connect the weighing platform cable to the terminal strip of the weighing terminal according to the following
table.
Signal
SIG+
SIG-
EXC+
EXC-
SEN+
SEN-
The cable shield must be grounded.
Safety Precautions for Connections
When connecting the weighing platform in hazardous area, strictly follow the requirements as stated in
control drawing available in [Appendix Page 21].
Please check the special conditions for safe use in the drawings and the certificates in [Appendix
Page 21].
The cable shield is connected to the load cell spring element (the body of the load cell). Please consider the
appropriate connection between load cell and terminal (or junction box) based on the installation scenario.
The resistance between all safety ground connections and the system grounding electrode must not exceed
1 ohm.
Installation shall be in accordance with relevant electrical installation standards.
Not following these instructions will jeopardize the explosion safety.
Wire Color
White
Red
Green
Black
Yellow
Blue
WARNING
Connector
6-WIRE CELLS
LOAD CELL OR JUNCTION BOX
Installation and Operation​ ​ 5