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INSTRUCTION MANUAL 

NI-492WE 

Rev. 4  05/18 

TEMPERATURE SWITCHES SERIE TXS, TXA 

 

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. 

 

This document is the property of ALEXANDER WIEGAND SE &Co and may not be reproduced in any form, nor used for any purpose other than for which 
it is supplied. 

 

 

WEATHERPROOF AND INTRINSICALLY SAFE:MODELS TXS; 

FLAMEPROOF: MODELS TXA 

CORD CABLE INSTRUMENT 

INSTRUMENT WITH JUNCTION BOX 

 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Stem Type C-Q-R 

Stem Type B 

 

WEIGHT 0,4kg 

Dimension in mm  WEIGHT 1kg 

Dimension in mm 

Stem Type B: Y = 125mm ; X = 50mm 

 

Stem Type Q: K = 5m ; Y max. = 900mm

 

Stem Type C: K = 2m ; Y max. = 350mm 

Stem Type R: K = 10m ; Y max. = 1800mm 

For surface mounting use two screws M6 (not supplied with the instrument) 

 

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

 in relation to working with instruments for hazardous 

areas. 

 

INSTALLATION  IS  TO  BE  CARRIED  OUT  ONLY  AFTER  CHECKING  THAT  INSTRUMENT  CHARACTERISTICS  ARE 
CONSISTENT WITH PROCESS AND PLANT 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

 

2 -

 

OPERATING PRINCIPLE

 

3 -

 

MODEL CODE

 

4 -

 

NAMEPLATE AND MARKINGS

 

5 -

 

SPECIAL CONDITIONS FOR SAFE USE (X)

 

6 -

 

SET POINT ADJUSTMENT

 

7 -

 

SET POINT CALIBRATION

 

8 -

 

INSTRUMENT PLUMBING

 

9 -

 

MOUNTING AND CONNECTIONS

 

10 -

 

PUTTING INTO OPERATION

 

11 -

 

VISUAL INSPECTION

 

12 -

 

FUNCTIONAL VERIFICATION

 

13 -

 

STOPPING AND DISMOUNTING

 

14 -

 

DISPOSAL

 

15 -

 

TROUBLE SHOOTING

 

 

SAFETY INSTRUCTIONS FOR USE IN EXPLOSIVE ATMOSPHERES 

 

RECOMMENDATIONS FOR THE SAFE USE OF THE INSTRUMENT 
 

DOCUMENT CORRELATED 

to document authenticated with certificates 

N° IECEx PRE 16.0073X 
N° IECEx PRE 16.0074X 

Summary of Contents for TXS Series

Page 1: ...eights 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...

Page 2: ...vates one or two simultaneous release electric microswitches The microswitches are of the rapid release type with automatic rearm When the temperature moves away from the set values returning towards...

Page 3: ...strument closes the circuit when the set point is reached with temperature on fall closure on fall The temperature switch must be kept in the normal installation position i e with the temperature conn...

Page 4: ...ion and accidental bumps Fig 6 Temperature switch for ambient temperature measurement 9 5 ELECTRICAL CONNECTIONS It is recommended to carry out the electrical connections according to the applicable s...

Page 5: ...external condition of the enclosure In case of flameproof or intrinsic safety instruments inspections of the electrical installation are to be carried out also according to customer procedures and at...

Page 6: ...ened electrical joints Interrupted or short circuited electrical line Microswitch contacts damaged Filling fluid leakage Check all electrical joints Check the conditions of the electrical line Replace...

Page 7: ...allation Annex 1 Model code 1 MODEL CODE TX For further information see datasheet 1 1 Ignition protection mode S Weatherproof A Ex d 1 2 Enclosure code material 2 Aluminium 4 316 s s B Direct Mounting...

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