WIKA TR10-C - Handbuch (Seite 22)

14106886.01 06/2014 GB/D
22 WIKA operating instructions resistance thermometers and thermocouples, Ex n
GB
6.7.5 Tightening torques for connection to thermowell
Thread Tightening torques in Nm
½ NPT 35
¾ NPT 40
G ½ B 35
G ¾ B 40
M14 x 1.5 25 ... 30
M18 x 1.5 35
M20 x 1.5 35 ... 40
M27 x 2 40 ... 45
6.7.6 Tightening torques for compression fitting
Sealing Turns Max. pressure in bar
Stainless steel ferrule 1 ¼ ... 1 ½ 100
Stainless steel compression ring 1 ¼ ... 1 ½ 100
PTFE ferrule 1 ¼ ... 1 ½ 8
7. Information on mounting and operation in hazardous areas (Europe)
7.1 General information on explosion protection
Follow the requirements of the 94/9/EC (ATEX) and IEC directives.
Additionally the specifications of the respective national regulations concerning Ex
usage apply.
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.
6. Commissioning, operation / 7. Information on mounting and ...