WIKA TWG - Manual

INSTRUCTION MANUAL
NI-401E
Rev. 3 07/99
TEMPERATURE SWITCHES
All data, statements and recommendations supplied with this manual are based on information believed by us to be
reliable. As the conditions of effective use are beyond our control, our products are sold under the condition that the
user himself evaluates such conditions before following our recommendations for the purpose or use foreseen by him.
The present document is the property of ETTORE CELLA SPA and may not be reproduced in any form, nor used for
any purpose other than that for which it is supplied.
WEATHERPROOF: SERIES TWG EXPLOSIONPROOF: SERIES TAG
A = bulb connection
B = cable entry X = Bulb sensitive portion
Y = Insertion length
K = Capillary length A = bulb connection
B = cable entry X = Bulb sensitive portion
Y = Insertion length
K = Capillary length
PESO 2,1 kg dimensions in mm PESO 2,9 kg dimensions in mm
NOTE: dimensions and weights are not binding unless released on certified drawings.
CAUTION
• Before installing, using or carrying out maintenance on the instrument it is necessary to read and understand the
indications given in the attached Instruction Manual.
• The instrument must only be installed and maintained by qualified personnel.
• Installation must only be carried out following verification of the congruity of the instrument features with the plant
and process requirements.
• The
functional features of the instrument and its degree of protection are shown on the identification plate fixed to the
case.
CONTENTS:
1 - GENERAL NOTES
2 - OPERATING PRINCIPLE
3 - SET POINT REGULATION
4 - SET POINT CALIBRATION
5 - MOUNTING AND CONNECTIONS
6 - INSTRUMENT PLUMBING
7 - PUTTING INTO OPERATION
8 - FUNCTIONAL VERIFICATION
9 - TROUBLESHOOTING
10 - STOPPING AND DISMOUNTING
11 - DEMOLITION
One contact
Two contacts Stem type “B” Stem type “C” Stem type “ F”