Bosche WTS - User Warnings; Recommendations for Correct Installation of Weighing Instruments

User manual WTS Ver.1.16
Seite 4 von 52
1 USER WARNINGS
RECOMMENDATIONS FOR THE PROPER USE OF WEIGHING INSTRUMENT
- Keep away from heat sources and direct sunlight
- Repair the instrument from rain (except special IP versions)
- Do not wash with water jets (except special IP versions)
- Do not dip in water
- Do not spill liquid on the instrument
- Do not use solvents to clean the instrument
- Do not install in areas subject to explosion hazard (except special Atex versions)
2 RECOMMENDATIONS FOR CORRECT INSTALLATION OF WEIGHING
INSTRUMENTS
The terminals indicated on the instrument’s wiring diagram to be connected to earth
must have the same potential as the weighed structure (same earthing pit or earthing
system). If you are unable to ensure this condition, connect with an earthing wire the
terminals of the instrument (including the terminal 0 VDC) to the weighed structure.
The cell cable must be individually led to its panel input and not share a conduit with
other cables; connect it directly to the instrument terminal strip without breaking its
route with support terminal strips.
Use “RC” filters on the instrument-driven solenoid valve and remote control switch coils.
Avoid inverters in the instrument panel; if inevitable, use special filters for the inverters and
separate them with sheet metal partitions.
The panel installer must provide electric protections for the instruments (fuses, door lock switch
etc.).
It is advisable to leave the equipment always switched on to prevent the formation of
condensation.
MAXIMUM CABLE LENGTHS
RS485: 1000 metres with AWG24, shielded and twisted cables
RS232: 15 metres for baud rates up to 19200