E36.0.01.6C-01
Installation and
Operating Manual GIA 0420 … - ex
page 3 of 20
2
Designated Use
2.1 Intended Use
The GIA 0420 VO(T) - ex and GIA 0420 WK(T) - ex are microprocessor controlled display devices for 4..20 mA input
signals.
The device is suitable for use in potentially explosive atmospheres of group II, zone 1 and 2, temperature class T4 to
T1 (according to IEC 60079-0).
The device must not be used in hazardous areas other than those mentioned above, in particular not in underground
mines as well as in potentially explosive dust atmospheres.It should also be noted that the device is not suitable for
applications which require the temperature classes T6 or T5.
The GIA 0420 ... - ex is optionally available with a electrically isolated switching output. The output switch and the
switching device must be supplied from the same intrinsically save circuit as the display GIA 0420 ... - ex.
The device may only be operated in combination with Ex-approved transmitters and intrinsically safe circuits in accor-
dance with the connection data. The total capacitance and inductance of device GIA 0420 ... - ex, intrinsically safe
transmitter, switching devices and wiring may not exceed the allowable for the intrinsically save circuit totals.
To configure GIA 0420 VO - ex and GIA 0420 WK - ex the cover has to be removed to get access to the needed but-
tons. This may not be done in hazardous areas.
If the GIA 0420 ... - ex was operated on non-intrinsic circuits or if the permissible load values were exceeded, the de-
vice must not be used again in Ex applications.
Only technically qualified persons are permitted to carry out installation, commissioning, operation and decommis-
sioning. The qualified personnel must have carefully read and understood the operating manual before beginning
any work.
The liability and warranty of the manufacturer for damages and consequential damages are voided with misuse, dis-
regard of this operating manual, assignment of inadequately qualified technical personnel and arbitrary modifications
of the product.
2.2 Safety signs and symbols
Warnings are labelled in this document with the followings signs:
Caution!
This symbol warns of imminent danger, death, serious injuries and significant damage to
property at non-observance
Caution!
This symbol indicates a potentially dangerous situation in explosion-prone areas that can
result in death or severe injuries if it is not avoided.
Attention!
This symbol warns of possible dangers or dangerous situations which can provoke damage
to the device or environment at non-observance.
Note!
This symbol point out processes which can indirectly influence operation or provoke
unforeseen reactions at non-observance.
2.3 Skilled personnel
are persons who are familiar with the set-up, installation, commissioning and operation of the product and have
appropriate qualification for their work. For example:
• Training or instruction and/or authorisation, power circuits and devices/systems in accordance with the standards
of safety for activation, deactivation, disconnection, earthing and identification.
• Training or instruction in accordance with the standard of safety technology for care and use of suitable safety
equipment.
• Knowledge about the installation of devices in explosion-prone areas.
