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In most solids application there is no requirement to measure very close to the
transducer blanking area, if this is the case then we can shape DATEM away
from the ringdown area which can decrease the possibility of the unit reading
high when the level is low. These parameters are application dependant and
should be used with the commission engineers discretion.
Example.
The DATEM trace has been shaped around some close in noise and extended
outwards from the ringdown area, the unit is measuring the larger of two echoes
seen at the bottom of the application.
P81,P82,P83 & P84 (See Loss Limit Values).
You can see from the above example that the loss limit values have been reset,
this is to enable the unit to pick up smaller echoes when the silo is filling and
picking up the echo is difficult, these parameters are application dependant and
should be used with the commission engineers discretion.
P809 = Failsafe Timer = ????. This value should be increased to suit the
application, for example, if the silo is filled from a tanker and this takes 45mins
then the failsafe timer should reflect the time taken to fill the silo and for the
reading to be re-established before going into a failed safe mode.
P87 = Failsafe Time 2 = As above.
P906 = Side Clearance = ????. This parameter should be used as detailed in this
manual when the silos has obstructions between the transducer and the product,
prior to switching DATEM off as detailed below.
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