ABB 266 DDS, Руководство пользователя

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2 6 6 DDS H A RT |
P R E SSU R E T R A N SM I T T ER S | O I/ 2 6 6 D DS - EN R E V. B 55
Application with Gas
Application with Dust
Zone “0” Zone “1”
Dangerous
medium
(process)
Tank
Zone “0” / Zone “1”
separation element
Primary
transducer
266 Tx
Category
1/2 G Ex db Ga/Gb
Zone “20”
Dangerous
medium
(process)
Silo
Zone “21”
266 Tx
Category
1/2 D Ex tb Db
b) Certificate ATEX II 1/2 G Ex db IIC T6 Ga/Gb and II 1/2 D Ex tb IIIC T85°C Db, Ta = -50°C to +75ºC
FM Approvals Certificate number FM09ATEX0023X (Tremezzina, Warminster, Bangalore, Shanghai and Dammam products)
The meaning of ATEX code is as follows:
– II: Group for surface areas (not mines)
– 1/2: Category - It means that only a part of the transmitter complies with category 1 and a second part complies with category 2
(see next application sketch).
– G: Gas (dangerous media)
– D: Dust (dangerous media)
– T85°C: Maximum surface temperature of the transmitter enclosure with a Ta (ambient temperature) +75°C for Dust (not Gas)
with a dust layer up to 50 mm depth.
The number close to the CE marking of the transmitter safety label identifies the Notified Body which has responsibility for the
surveillance of the production.
Certificate IECEx Ex db IIC T6 Ga/Gb and Ex tb IIIC T85°C Db, Ta= -50°C to +75°C
IECEx certificate number IECEx FME 16.0002X (Tremezzina, Warminster, Bangalore, Shanghai and Dammam products)
The other marking refers to the protection type used according to relevant EN standards:
– Ex d: Explosion proof
– IIC: Gas group
– T6: Temperature class of the transmitter (corresponding to 85°C max) with a Ta from -50°C to +40°C
About the applications, this transmitter can be used in Zone “0” (Gas) classified areas (continuous hazard) with its “process part”
only, whereas the remaining part of the transmitter, i.e. its enclosure, can be used in Zone 1 (Gas), only (see sketch below). Reason
of this is the process part of the transmitter (normally called primary transducer) that provides inside separation elements to seal
off the electrical sensor from the continuously hazardous process, according to the EN 60079-1.
.
About Dust application, the transmitter is suitable for “Zone 21” according to the EN 60079-1 as it is shown on the relevant part of
the sketches.
Application for pressure transmitter Ex d categories 1/2 G and 1/2 D
IMPORTANT