Safety Instructions; Product Description; General Installation Instructions - WIKA NEUMO BIOCONTROL Série Mode D'emploi

Diaphragm Seal Measuring Systems
GB

1. Safety instructions

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to scale range and performance and the appropriate wetted material
(corrosion) for the specific measuring conditions of the respective application is selected.
In order to guarantee the accuracy and long-term stability specified, the corresponding load
limits are to be observed. Specifications: see data sheet under www.wika.de
Only qualified persons authorised by the plant manager are permitted to install, maintain
and service the pressure gauges
Dangerous pressure media such as Oxygen, Acetylene, flammable gases or liquids, toxic
gases or liquids as well as for refrigeration plants or compressors requires attention above
the standard regulations. Here the specific safety codes or regulations must be considered
Serious injuries and/or damage can occur should the appropriate regulations not
be observed
Instruments should be protected against coarse dirt and wide fluctuations in ambient
temperature
If the operating instructions are not observed and complied with, approvals (e.g. ATEX)
can become invalid

2. Product description

A diaphragm seal measuring system comprises the following components: Diaphragm seal,
transmission line (i.e. capillary extension) and measuring instrument, all of which must not be
separated. The measuring system uses hydraulics to transmit pressure. Apart from the capillary
extension the diaphragm with a thickness of only approx. 0.1 mm, is the most sensitive
component.
The smallest of leaks in the transmission system will lead to loss of filling liquid and as a result
to inaccurate measurements or failure of the measuring system. To avoid leaks and measuring
errors, please observe the following general instructions for handling, installation and
maintenance as well as the operating manual of the measuring instruments which are
combined with the diaphragm seal.

3. General installation instructions

To protect the measuring system from mechanical damage leave it in the factory packing
until installation.
When removing the measuring system from the factory packing and during installation treat
the system with particular care to prevent damage and mechanical deformation of the diaphragm
Never undo the sealed filling screw on either the diaphragm seal or the measuring istrument
Do not damage the diaphragm. Scratches on the diaphragm(caused by sharp objects, for
example) are the main causes of corrosion.
For sealing choose appropriate seals.
For flange fitting use a seal with adequate large inner diameter and center it. Contact with
the diaphragm leads to deviations in measurement.
When using soft or PTFE seals, observe the instructions of the seal manufacturer, especially
with regards to tightening torque and setting cycles.
For installation use appropriate fixing position, screws and screw nut according to fitting
and flange standard.
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The user must ensure that the appropriate pressure gauge with regard
WIKA Operating Instructions Diaphragm Seals