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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”

1 2 3 4 5 6

Inhaltsverzeichnis

Seite 1 - TEMPERATURE SWITCHES

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 TEMPERATURE SWITCHES All data, statements and recommendations supplied with this manual are based on inform

Seite 2

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 1 - GENERAL NOTES 1.1 FOREWORD The wrong choice of a series or a model, as well as the incorrect installati

Seite 3

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 4 - SET POINT CALIBRATION In order to proceed with the calibration and the periodical functional verificati

Seite 4

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 4.2.11 Check the calibration values (varying the temperature in the circuit accordingly) and record them on

Seite 5

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 9 - TROUBLESHOOTING IMPORTANT NOTE: operations involving replacement of essential components must be carrie

Seite 6

INSTRUCTION MANUAL NI-401E Rev. 3 07/99 WEATHERPROOF EXPLOSIONPROOF fig. 6 - Example of connections - fig. 7 - Example of connections - 1) W

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