11349167.03 10/2011 GB/D/F/E
WIKA operating instructions intelliGAUGE / switchGAUGE
5
GB
3. Installation instructions
3. Installation instructions
Installation
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Nominal position acc. EN 873-3 / 9.6.6 figure 7: 0° or 90°
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Pressure connector bottom or rearside
Permissible vibration load at the mounting point
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The instrument should always be installed in locations free of vibration.
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If necessary, it is possible to isolate the instrument from the mounting
point by installing a flexible connection line between the measuring
point and the pressure gauge and mounting the instrument on a suitable
bracket.
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If this is not possible, the following limit values must not be exceeded:
Unfilled devices:
Frequency range 10 … 150 Hz
Accelaration
< 0.5 g (5.0 m/s²)
Liquid filled devices:
Frequency range 10 … 150 Hz
Accelaration
< 4.0 g (39.2 m/s²)
The liquid filling has to be checked periodically.
The liquid level must not drop below 75 % of the instrument´s diameter.
Test connector
At certain use cases (e.g. steam vessels) isolating devices have to have a
test connector, so that the instrument can be checked without dismounting.
Mounting provisions
If the line for the pressure gauge is not rigid enough for vibration-free instal-
lation, fasten the instrument using appropriate fastening elements for wall
and / or pipe mounting, and, if necessary, by means of a capillary line.
Measuring system damping
If it is not possible to avoid vibration by means of appropriate mounting, use
pressure gauges with liquid filling.
Effects of temperature
The mounting of the pressure instrument has to be done in a way that the
operating temperature is neither exceeded nor falls below the permissible
operating temperature, even in consideration of thermal convection and
thermal radiation. Tailpipes of a suitable length or syphons may be used to
protect the pressure instrument and the isolating device.
The influence of the temperature onto the accuracy of indication and of
measurement has to be noticed.
