WIKA NS160 Betriebsanleitung Seite 13

6. Commissioning, operation
For filled versions, it must be ensured that a case filling which escapes in the event of
„
a fault cannot reach system parts whose surface temperature exceeds the maximum
permissible medium temperature of the instrument.
For outdoor applications, the selected installation location has to be suitable for the
„
specified ingress protection, so that the instrument is not exposed to impermissible
weather conditions.
In order to avoid any additional heating, the instruments must not be exposed to direct
„
solar irradiation while in operation!
To ensure that the pressure can be safely vented in the case of failure, instruments with
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blow-out device or blow-out back must keep a minimum distance of 20 mm from each
object.
Permissible ambient and operating temperatures
When mounting the instrument it must be ensured that, taking into consideration the influ-
ence of convection and heat radiation, no deviation above or below the permissible ambient
and medium temperatures can occur. The influence of temperature on the indication accura-
cy must be observed.
WARNING!
The actual maximum surface temperature depends not on the equipment
itself, but mainly on the operating conditions. With gaseous substances, the
temperature may increase as a result of compression warming. In these cases
it may be necessary to throttle the rate of change of pressure or reduce the
permissible medium temperature.
Permissible vibration load at the installation site
The instruments should always be installed in locations free from vibration.
If necessary, it is possible to isolate the instrument from the mounting point, e.g. by installing
a flexible connection line between the measuring point and the instrument and mounting the
instrument on a suitable bracket.
If this is not possible, the following limit values must not be exceeded:
Frequency range < 150 Hz
Acceleration < 0.5 g (5 m/s
Commissioning of pressure compensating valve
Instruments which are fitted with a pressure compensating valve
must, following installation, be vented for internal pressure compen-
sation.
Tool: Open-ended spanner SW 9
1. Remove plastic cap
2. Loosen the threaded connection above the valve body
3. Screw the valve body tight, turned through 180°, with ≤ 4.5 Nm
For information on the ingress protection, see Technical information IN 00.18
WIKA operating instructions pressure gauge, model 4 per ATEX
)
2
Before commissioning
After commissioning
13
EN