Wika TR10-C Manuel d'utilisateur télécharger pdf (Page 23)

WIKA operating instructions resistance thermometers and thermocouples, Ex n

14106886.01 06/2014 GB/D

D) Point C) does not apply if the component was repaired by the manufacturer and subject to a

component testing.

E) When using a transmitter you must consider:

■

The contents of these operating instructions and those of the transmitter

■

The relevant regulations for installation and use of electrical systems

■

The regulations and guidelines regarding explosion protection

■

Transmitters must have their own certication.

F) When ordering spare parts, the parts that are to be replaced must be specied exactly:

■

Ignition protection type (Ex n)

■

Approval No.

■

Order No.

■

Manufacturing No.

■

Order item

G) Thermometers as explosion-protected equipment only full the safety-relevant demands as

components, as dened in the approval.

Measuring elements or connection heads alone do not full the requirements of

explosion protection.

H) Installation in Zone 22 (dust)

The requirements of EN 60079-0 and EN/IEC 60529 must be followed.

The surface temperature of the equipment must not be high enough to ignite disturbed dust or

dust deposited on the equipment.

Without dust deposit:

The surface temperature may not exceed 2/3 of the ignition temperature in °C of the

respective dust/air mixture (IEC/EN 60079-14).

With dust deposit:

On surfaces where a dangerous deposit of ignitable dust is not eectively prevented, the

surface temperature may not exceed a temperature of 75 K less than the ignition temperature

of the respective dust. With layer thicknesses over 5 mm, a further reduction of the

temperature is necessary.

I) The installer guarantees as his own responsibility that all thermometers in operation are

identiable with respect to all safety-relevant characteristics.

7. Information on mounting and operation in hazardous areas

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Wika TR10-C Manuel d'utilisateur Page 23

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