VEGA VEGAFLEX 67 (-40…+150°C PFA insulated) Foundation Fieldbus - Manual (Page 12)

Fig. 3: Measures against moisture penetration
The reference plane for the measuring range of the sensors is the
sealing surface of the thread or flange.
Keep in mind that a min. distance must be maintained below the
reference plane and possibly also at the end of the probe -
measurement in these areas is not possible (dead band). Particularly
the cable length cannot be used all the way to the end because
measurement in the area of the gravity weight is not possible. These
dead bands are listed in chapter "Technical data". Keep in mind for the
adjustment that the default setting for the measuring range refers to
water.
The process fitting must be sealed if there is gauge or low pressure in
the vessel. Before use, check if the seal material is resistant against
the measured product and the process temperature.
The max. permissible pressure is specified in chapter "Technical data"
or on the type label of the sensor.
4 .2 Instructions for installation
When mounting the cable and rod versions of VEGAFLEX 67 keep at
least a distance of 300 mm (11.81 in) to other vessel installations or to
the vessel wall.
During operation, the probe must not touch any installations or the
vessel wall. If necessary, fasten the probe end.
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
down to the lowest point of the bottom. When using the cable version,
Measuring range
Pressure
Mounting position
12 VEGAFLEX 67 • Foundation Fieldbus
4 Mounting
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