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2 6 6 D D S H A R T | P R E S S U R E T R A N S M I T T E R S | O I/ 2 6 6 D D S - E N R E V. A
10 Hazardous Area considerations
Specific Conditions of Use (X)
1.
When the manufacturer of the equipment has not
identified the type of protection on the label, the user shall, on
installation, mark the label with the type of protection used.
Once the type of protection has been marked it shall not be
changed .
2.
The material of the partition wall (sensing diaphragm)
shall not be subject to environmental conditions which might
adversely affect it.
3.
The Model 266 main electronics enclosure option s = A
or B contains aluminium and is considered to present a
potential risk of ignition by impact or friction. Care must be
taken into account during installation and use to prevent
impact or friction.
4.
For areas subject to explosive dust atmospheres the
painted surface of the Model 266 may store electrostatic
charge and become a source of ignition in applications with a
low relative humidity <~30%relative humidity where the
painted surface is relatively free of surface contamination such
as dirt, dust, or oil. Guidance on protection against the risk of
ignition due to electrostatic discharge can be found in IEC TS
60079-32-1. Cleaning of the painted surface shall only be done
in accordance with the manufacturer's instructions.
Ex Safety aspects and IP Protection (Europe)
According to ATEX Directive (European Directive 2014/34/EU
and relative European Standards which can assure compliance
with Essential Safety Requirements, i.e., EN 60079-0 (General
requirements) EN 60079-1 (Flameproof enclosures "d"), the
pressure transmitters of the 2600T SERIES have been certified
for the following group, categories, media of dangerous
atmosphere, temperature classes, types of protection.
Examples of application are also shown below by simple
sketches.
Type-examination certificate/Declaration of
conformity
For transmitters with hazardous location design, the EU
declaration of conformity and this operating instruction should
be complied with. The EU type examination certificates to be
applied are available for download online on the ABB website.
Type of protection "intrinsic safety Ex ia"
Only intrinsically safe devices may be installed in the
transmitter signal circuit. The signal circuit can be interrupted
while the transmitter is in operation (e.g., clamping/
unclamping signal lines). The housing may be opened during
operation, in absence of explosive atmosphere.
Transmitters with and without remote seals and featuring type
of protection "intrinsic safety Ex ia" may be directly integrated
into the partition separating application for gas Zone 0 and
Zone 1 (sensor diaphragm in Zone 0, transmitter in Zone 1), and
application for dust Zone 20 and Zone 21 (sensor diaphragm in
Zone 20, transmitter in Zone 21), provided that the power is
supplied via an intrinsically safe circuit with type of protection
"Ex ia".
Use in areas with combustible dust
Installation should be performed in accordance with the EN
60079-14 installation regulations.
The transmitter should only be connected using cable glands
certified in accordance with Directive 2014/34/EU (ATEX). The
cable gland must conform to IP rating IP 67.
The smoldering temperature of the dust must be at least 75 K
above the maximum surface temperature of the transmitter.
The maximum surface temperature is 120 °C (248 °F) or T135 °C.
WARNING - RISK OF EXPLOSION
When using remote seals with an anti-stick coating, be aware
of the risk of electrostatic discharge (with consideration
given to the filling material and transport speed).
WARNING - RISK OF EXPLOSION
Opening the housing during operation (with the supply
voltage switched on) is not permitted. Opening the cover
presents a risk of spark formation and, therefore, explosion.
Only open the housing when the supply voltage is switched
off).
Use of handheld terminal / PC
If a handheld terminal or a PC is being used for communication
/ configuration / parameterization in a potentially explosive
atmosphere with type of protection "intrinsic safety", the
devices used must be certified accordingly.
This applies even if the device is only connected for a short
period of time. This proof of "intrinsic safety" must be supplied
in addition to the transmitter.
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