WIKA TR31-3 Betriebsanleitung Seite 33

10. Information on mounting and operation in ...
- Fine-gauge wires with bare ends must be finished with end splices
(cable preparation).
- With cables for use in zone 1 and 2, the test voltage between
conductor/ground, conductor/screen, screen/ground must be
> AC 500 V.
Neither repairs nor structural modifications are permitted, and any
■
would void the guarantee and the respective certification.
The manufacturer shall not be responsible for constructional
■
modifications after delivery of the instruments.
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.
WIKA operating instructions models TR31-3, TR31-K (Ex i)
EN
33