VEGA POINTRAC 31 8_16 mA_HART - four-wire With SIL qualification - Manual (Page 9)

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3 Product description
POINTRAC 31 • 8/16 mA/HART - four-wire
43388-EN-131119
To this end, make use of our planning service for an optimum layout of
the measurement and selection of the isotope. This applies particu-
larly to SIL applications.
Due to the physical properties of the radioactive radiation, the pulse
rate is subject to slight fluctuations. Set a suitable damping level to get
a stable measured value.
The relation between level and the pulse rate measured by the sensor
is not linear.
Set up a linearization table to get a linear level signal. For precise
mesurement results, make sure when setting up the linearization
table that the actual filling height of the measuring points is entered as
exactly as possible.
External radiation sources can influence the measured value (e.g.
welding joint tests). In safety-relevant applications, the safety function
must be treated as unreliable as long as the external radiation occurs.
If necessary, you must take measures to maintain the safety function.
Make sure during the planning that for the planned application, a
possibly large different of the pulse rate with empty and full vessel is
reaced. This applies mainly for products with low density or in vessels
with extremely small diameter.
3.4 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
•
Not in the open
•
Dry and dust free
•
Not exposed to corrosive media
•
Protected against solar radiation
Non-linearity of the pro-
cess value
External radiation
Span
Packaging
Transport
Transport inspection
Storage