Ambient Temperature; Special Conditions For Use (X Conditions) - WIKA CPT7000-IS Betriebsanleitung

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3. Safety

For applications that require category 2D instruments (potentially explosive dust

atmospheres), the following ambient temperature ranges apply:

Marking

ATEX

IECEx

Reference pressure sensor model CPT7000-IS

II 1D

Ex ia IIIC T135°C Da

II 1/2D

Ex ia IIIC T135°C Da/Db

3.7 Special conditions for use (X conditions)

General

For functional reasons, the partition wall inside the pressure sensor (membrane

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of pressure sensor element) to the wetted area has a wall thickness < 0.2 mm. In

the application it has to be ensured, that an impairment of the membrane e. g. by

aggressive media or mechanical hazards is excluded.

Partition wall characteristics inside the pressure sensor as given in the manufacturer's

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application information shall be observed.

EPL Ga or EPL Da application

In case of EPL Ga or EPL Da area on both sides of the mounting assembly of the

pressure sensor, all metallic parts shall be included in the equipotential bonding

EPL Ga/Gb or EPL Da/Db application

The process connection in the boundary wall between areas requiring EPL Ga and

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less hazardous area shall be a gas-tight standardized thread connection with IP67

rating according to IEC/EN 60529. For areas requiring EPL Da the thread connection

shall be IP6X.

The installation of the pressure sensor in the boundary wall separating areas with EPL

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Ga or EPL Da requirements from less hazardous areas shall be executed in such a

way, that the pressure sensor is included in the equipotential bonding.