Important Details For Your Information; A Quick Overview For You; Signs, Symbols And Abbreviations; Function - WIKA NWU-1 Serie Mode D'emploi

1. Important details for your information / 2. A quick overview for you / 3. Signs and symbols
Knowledge required
Install and start the transducer only if you are familiar with the relevant regulations and direc-
tives of your country and if you have the qualification required. You have to be acquainted
with the rules and regulations on hazardous areas, measurement and control technology
and electric circuits, since this transducer is „electrical equipment" as defined by EN 50178.
Depending on the operating conditions of your application you have to have the correspon-
ding knowledge, e.g. of aggressive media.

2. A quick overview for you

If you want to get a quick overview, read Chapters , 5, 7 and 11. There you will get some
short safety instructions and important information on your product and its starting. Read
these chapters in any case.

. Signs, symbols and abbreviations

Potential danger of life or of
!
severe injuries.
Warning
Instructions for hazardous
areas: Potential danger of
life or of severe injuries.
Warning
Notice, important informa-
tion, malfunction.
FM
Factory Mutual
The product was tested and
certified by FM Approvals.
It complies with the appli-
cable US-American stan-
dards on safety (including
explosion protection).
4 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio NWU-1
GB
Potential danger of life or
of severe injuries due to
catapulting parts.
Warning
Potential danger of burns
due to hot surfaces.
Caution
The product complies with
the applicable European
directives.
ATEX
European guideline for
explosion protection
(Atmosphäre=AT, Ex-
plosion=EX). The product
complies with the require-
ments of the European
directive 94/9/EC (ATEX) on
explosion protection.
3. Signs, symbols and abbreviations / 4. Function and accessories / 5. For your safety
2-wire Two connection lines are intended for the voltage supply.
The supply current is the measurement signal.

4. Function

Ultra High Purity Transducer
NWU-10: Single End
NWU-15: Flow Throug
NWU-16: Modular Surface Mount
Function: The pressure prevailing within the application is transformed into a standardised
electrical signal through the deflection of the diaphragm, which acts on the sensor element
with the power supply fed to the transmitter. This electric signal changes in proportion to the
pressure and can be evaluated correspondingly

5. For your safety

Select the appropriate transducer with regard to scale range, performance

!
and specific measurement conditions prior to installing and starting the
instrument.
Warning
Observe the relevant national regulations (e.g.: EN 50178) and observe the

applicable standards and directives for special applications (e.g. with
dangerous media such as acetylene, flammable gases or liquids and toxic gases or liquids
and with refrigeration plants or compressors). If you do not observe the appropriate
regulations, serious injuries and/or damage can occur!
 Open pressure connections only after the system is without pressure!
 Please make sure that the transducer is only used within the overload threshold limit all
the time!
Observe the ambient and working conditions outlined in section 7 „Technical data".

Ensure that the transducer is only operated in accordance with the provisions i.e. as

described in the following instructions.
Do not interfere with or change the transducer in any other way than described in these

operating instructions.
WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio NWU-1
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GB
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