Vetek DGT, Technical Manual

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DGT / DGT60 / DGTQ / DGTP
3
!!WARNING!!
For the
ATEX
weight indicator version it is
COMPULSORY
to read and understand the
ATEX
ATTACHMENT in the user manual ( USER MAN.REF .) containing important warnings.
1. REQUIREMENTS FOR AN EFFECTIVE INSTALLATION
To obtain the best results it is recommended to install the indicator and the platform (or transducer) in a place with
the following conditions (for
ATEX version refers to the corresponding attachment in user manual):
•
Stable and vibration free
•
Moderate temperature and humidity (15-30°C and 40-7 0%).
•
No dust or strong vapours
•
No draughts
•
Mains power supply is restricted to within ± 10% of the rated voltage
•
Make sure the platform is level or that the loading cells are resting evenly
•
Avoid welding with load cells installed.
•
When the load cells are used with assembling kits under storage bins or the like,
connect the upper and lower supporting plate with a copper wire cable and then earth
all the upper plates.
•
Use waterproof sheaths and couplings in order to protect the load cell cables.
•
Use a waterproof junction box to connect the cells .
•
The extension leads of the load cells or signal amplifiers must be screened. In
addition they must be laid on their own in a raceway or metal pipe as far away as
possible from the power supply cables.
•
Connection of the cell or amplifier cables on the electrical panel shall be independent
and, if possible, connected directly to the indicator’s terminal board without laying
other cables in the raceway.
•
Install "RC" filters on the contactor coils, on the solenoid valves and on all devices
producing electric disturbances.
•
If it is possible that condensation could form inside the weight transmitter it is
advisable to leave the instrument powered at all times.
•
Electric protections (fuses etc.) are provided by the technician installing the
instrument.
•
Do not install anywhere where there is the risk of explosion.