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36287-741-16-A4
Safety Instructions
07.12.06
07.12.06
07.12.06
Date
Klausgrete
Klausgrete
Klausgrete
Name
Drawing no.
Title
Released by
Reviewed by
Written by
Revision
00
1.
The equipment may be used zone 2 and 22 hazardous areas. In zone 22, the device is approved for
use only in the presence of non-conductive dusts. The permissible ambient temperature is –10°C to
+40°C (14°F to 104°F). The equipment must be used indoors.
2.
The indicator may not be used as a portable device.
3.
Installation, operation, maintenance and repair of the equipment may only be performed by an
authorized technician and in compliance with applicable laws, rules and regulations, ordinances and
standards. In particular, make sure all work performed conforms to European Standards EN 60079-
14 (Electrical apparatus for use in potentially explosive gas atmospheres) and EN 50281-1-2
(Apparatus for use in the presence of combustible dusts). Installation, operation, maintenance and
repair of the equipment may only be performed when the equipment is completely disconnected from
the power supply.
4.
Make sure to follow the installation, operating, maintenance and servicing instructions given in the
manuals supplied.
5.
The cable glands must be fastened using a torque of 5 Nm. Use only 3 Nm to fasten the power
cable. The external connecting cables must be installed in a protective tube and secured to prevent
damage and stress caused by strain. The cable connections in the hazardous area must be secured
to prevent them from working loose.
6.
All metal parts (housing, column, etc.) must be electrically connected to the equipotential bonding
conductor so that any electrostatic charges can be conducted away from the equipment. The
equipment operator is obligated to connect a lead with a gauge of at least 4 mm² (cross section) to
the ground terminal (marked by the grounding symbol) located at the rear of the housing. The low
resistance of this connection to the grounding conductor busbar must be checked when the system is
installed at the intended place of use. Make sure the grounding conductor cannot be disconnected by
pulling on it. The shielding of the connecting cables may only be used for grounding when no
impermissible difference in voltage is generated and the shielding is able to conduct the potentially
occurring equipotential current.
Both the display and control unit and the weighing platform
must be connected to an equipotential bonding conductor
if no metallic connection (such as a
column) is used. The standard display and control unit has no grounding terminal and thus must be
grounded by internal wiring.
7.
Before opening the equipment, completely turn off the power or make sure that no potentially
explosive atmosphere is present in the area or any other explosion hazard in the surrounding
area. Never connect or disconnect cables while the power is on in a hazardous area!
8.
Use equipment only in the temperature ranges indicated. Avoid exposing the equipment to
impermissible sources of heat or cold. Avoid heat build-up. Make sure the equipment is properly
ventilated.
9.
Ensure proper installation to avoid vagrant current (e.g., magnetic fields).
10.
Install the indicator (or the display and control unit supplied with the complete scale) in such a way
that mechanical hazard to the IP protection is kept to a minimum.
11.
Make sure that the equipment is installed and operated without being exposed to impermissible UV
radiation (avoid direct exposure to sunlight).
12.
Ensure that the voltage rating or power supply is identical to your local power rating. When
connecting the equipment to the power supply, the laws valid in your country must be observed. Be
sure that the correct power supply cable is used.
13.
Prior to initial operation, make sure that there is no potentially explosive atmosphere or any other
explosion hazard in the surrounding area.
These safety instructions apply to the installation, operation, maintenance
and repair of the equipment
