1.
Safety instructions With safety pattern gauges (see dial symbol k
Operating or s) you need to pay attention to the fact that
Instructions The user must ensure that the the free space behind the blow-out back will be
appropriate pressure gauge with at least 15 mm.
regard to scale range and performance
Pressure Gauges and the appropriate wetted material 2.1 Requirements for the installation point
(corrosion) for the specific measuring
If the measuring point is not adequately stable a
conditions of the respective application is selec-
measuring instrument support such as a bracket
ted. In order to guarantee the accuracy and
or flange should be used for fastening (and
Examples: long-term stability specified, the corresponding
possibly via a flexible capillary line). If the
load limits are to be observed. Specifications:
pressure gauge is exposed to vibration or
see data sheet under www.wika.de
pulsating pressure or both, then a liquid filled
Only qualified persons authorised by the plant pressure gauge may provide considerably better
manager are permitted to install, maintain and performance and readability. Instruments should
Model 732.14, service the pressure gauges. be protected against coarse dirt and wide
Overpressure safety fluctuations in ambient temperature. EN 837-2
Dangerous pressure media such as Oxygen, "Selection and installation recommendations for
up to 400 bar
Model 432.36,
Acetylene, flammable gases or liquids, toxic pressure gauges" should be complied with.
Overpressure safety gases or liquids as well as for refrigeration
up to 400 bar plants or compressors requires attention above 3. Admissible ambient and working
the standard regulations. Here the specific temperatures
Model 213.40 safety codes or regulations must be considered.
When installing the pressure gauge it has to be
Serious injuries and/or damage can occur ensured that, taking the influence of convection
should the appropriate regulations not be and heat radiation into consideration, no upper
observed. or lower deviation from the permissible ambient
and medium temperatures can occur. The
2. Mechanical connection influence of temperature on the class accuracy
According to the general technical regulations is to be observed.
for pressure gauges, respectively (i.e. EN 837-2).
4. Storage
When screw-fitting the gauges the force
required for this must not be applied through the The pressure gauge should remain in its original
Notes according to case or terminal box but just through the packing until installation. The gauge should be
Pressure Equipment Directive 97/23/EC spanner flats (with suitable tool) provided for this protected from external damage during storage.
purpose. Storage temperature: -40 °C ... +70 °C.
T The pressure gauges are "pressure accessories" Pressure gauges removed from service should
in accordance with article 1, paragraph 2.1.4 be protected from dust and humidity.
T The volume of the pressure bearing housings of Installation with
WIKA pressure gauges is < 0.1 L open-end wrench 5. Maintenance and servicing / Repairs
T The pressure gauges carry the CE marking for The instruments require no maintenance or ser-
fluid group 1G in accordance with annex 2, vicing. Tests should be carried out on a regular
Correct sealing of pressure gauge connections basis to guarantee the measuring accuracy of
table 1 when their permissible working pressure with parallel thread ? shall be means of a
exceeds 200 bar the pressure gauge. The tests or recalibrations
suitable sealing ring, sealing washer or WIKA have to be carried out by qualified persons with
Pressure gauges that do not carry the CE marking profile seals. The sealing of tapered threads (e.g. the appropriate equipment. Remainder of the
are manufactured in accordance with article 3, NPT threads) is made by providing the thread pressure medium contained in the
paragraph 3 "sound engineering practice". @‚ with additional sealing material like, for pressure element may be hazardous or
example, PTFE tape (EN 837-2). toxic. This should be considered when
handling and storing the removed
pressure gauge.
Technical alteration rights observed. wrench surface sealing of
the thread @ 6. Applied standard
sealing area ?
EN 837-1 Bourdon tube pressure gauges,
WIKA Alexander Wiegand GmbH & Co. KG Dimensions, metrology, requirements
The torque depends on the seal used. With
Alexander-Wiegand-Straße 30 and testing
standard G-type pipe thread, gauge connection
2408 976 10.02
63911 Klingenberg • Germany EN 837-2 Selection and installation recommen-
by means of a union nut or a LH-RH adjusting
Phone (+49) 93 72/132-0 dations for pressure gauges
nut is recommended to simplify correct
Fax (+49) 93 72/132-406 EN 837-3 Diaphragm and capsule pressure
orientation of the gauge.
E-Mail info@wika.de gauges, Dimensions, metrology,
www.wika.de requirements and testing
