Pulsar dBi Series, Instruction Manual

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Chapter 4 Getting Results With Your dBi Series Intelligent
Transducer
This chapter explains how to undertake the various functions of your dBi
Series Intelligent Transducer . Where specific parameters are used, consult
Parameter Guide in Chapter 5.
Setting up Your Application
Empty Distance
Empty Distance (P105) is the distance from the face of the transducer to
the material at the bottom of the vessel.
Span
Span (P106) is the distance from the empty level (0% full) to span (100%
full).
Near and Far Blanking
Near blanking ( P107 ) is the distance from the face of the transducer that
the dBi Series Intelligent Transducer will not record a level nearer than. A
typical reason to increase this from the default value would be if you wish to
ignore close in obstructions.
Far blanking ( P108 ) is the distance (as a percentage of empty level) beyond
the empty level that the dBi Series Intelligent Transducer will read, the
default is plus 20% of empty level. If you wish to monitor further than the
empty level , then increase this figure, so that the empty level plus the far
blanking figure (as % of empty level) is greater than the surface being
measured, within the capability of the transducer being used.
Using the 4-20 mA Output
The mA output can be used to monitor remotely what the dBi Series
Intelligent Transducer is measuring, so it can be displayed remotely,
integrated into a PLC, or used to generate a record using a chart recorder or
similar.
By default, the dBi Series Intelligent Transducer will provide a 4-20 mA
output that is proportional to level and can be overwritten as follows.