WIKA TC12-M - Handbuch (Seite 23)

GB
7. Information on mounting and operation in hazardous areas
14083458.01 09/2013 GB/D
WIKA operating instructions models TR12, TC12 (Ex i) 23
A) The responsibility for classification of zones lies with the plant operator and not the
manufacturer/supplier of the equipment.
B) The plant operator guarantees, and is solely responsible, that all thermometers in
use are identifiable with respect to all safety-relevant characteristics. Damaged
thermometers may not be used. Repairs may only be carried out by authorised and
qualified personnel. Repairs may only be completed using original spare parts from the
original supplier; otherwise the requirements of the approval are not fulfilled.
The manufacturer shall not be responsible for constructional modifications after delivery
of the instruments.
C) If a component of electrical equipment, on which the explosion protection depends,
is repaired, then the electrical equipment may only be put back into use, after an
authorised expert has stated that it corresponds to the fundamental characteristics of the
requirements for explosion protection. In addition this expert must provide a certificate
for this and provide the equipment with a test mark.
D) Item C) shall not apply if the component was repaired by the manufacturer in accordance
with the requirements and regulations.
E) When using transmitters and digital displays, the following must be observed:
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 and digital
displays must have their own certification.
F) When ordering spare parts, the parts that are to be replaced must be specified exactly:
■ Ignition protection type (here Ex i)
■ Approval No.
■ Order No.
■ Manufacturing No.
■ Order item
7.1.1 Special conditions of use (X conditions)
Versions with Ø <3 mm or “non-insulated” versions are operationally non-compliant with
section 6.3.12 of EN/IEC 60079-11. Therefore, from a safety-relevant point of view, these
intrinsically safe circuits must be considered galvanically connected to the earth potential,
which is why equipotential bonding must be secured for the entire installation of the
intrinsically safe circuits. In addition, for the connection, separate conditions in accordance
with EN/IEC 60079-14 must be observed.
Electrostatic discharges must be avoided in instruments, that due to their design, do not
conform to the electrostatic requirements in accordance with EN/IEC 60079-0.
The transmitters and digital displays used must have their own EN/IEC approval. The
installation conditions, electrical connected loads, temperature classes or maximum