WIKA N-11 - Manual (Page 3)

2147614.07 GB/D/F/E 04/2009
4 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio N-10, N-11
2147614.07 GB/D/F/E 04/2009
5 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio N-10, N-11
4. Function / 5. For your safety GB
. Signs, symbols and abbreviations
4. Function
N-10: Pressure connection (non-incendive) with internal diaphragm (standard version).
N-11: Pressure connection with flush diaphragm (non-incendive) for highly viscous or
solids entrained media which might clog the pressure port.
2-wire Two connection lines are intended for the voltage supply.
The supply current is the measurement signal.
3-wire Two connection lines are intended for the voltage supply.
One connection line is intended for the measurement signal.
U+ Positive supply connection
U- Negative supply connection
S+ Positive measurement connection
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.
Potential danger of life or of
severe injuries.
Notice, important informa-
tion, malfunction.
The product complies with
the applicable European
directives.
Instructions for hazardous
areas: Potential danger of
life or of severe injuries.
2. A quick overview / 3. Signs, symbols and abbreviations GB
. A quick overview for you
If you want to get a quick overview, read Chapters , 5, 7 and 10. There you will get some
short safety instructions and important information on your product and its starting. Read
these chapters in any case.
Potential danger of life or
of severe injuries due to
catapulting parts.
Potential danger of burns
due to hot surfaces.
ATEX
European guideline
for explosion protec-
tion (Atmosphäre=AT,
Explosion=EX)
The product complies with
the requirements of the
European directive 94/9/EC
(ATEX) on explosion protec-
tion.
5. For your safety
Select the appropriate pressure transmitter with regard to scale range,
performance and specific measurement conditions prior to installing and
starting the instrument.
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 pressure transmitter 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 pressure transmitter is only operated in accordance with the provisions i.e.
as described in the following instructions.
Do not interfere with or change the pressure transmitter in any other way than described in
these operating instructions.
Remove the pressure transmitter from service and mark it to prevent it from being used
again accidentally, if it becomes damaged or unsafe for operation
Take precautions with regard to remaining media in removed pressure transmitter.
Remaining media in the pressure port may be hazardous or toxic!
Have repairs performed by the manufacturer only.
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Information about material consistency against corrosion and diffusion can be found in our
WIKA-Handbook, 'Pressure and Temperature Measurement'.
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Warning
Warning
Warning
Caution
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Warning