Programming Page 20/51
MID_M2000_BA_02_1807
Full Scale Flow
This parameter sets the maximum flow the system is expected to
measure. This parameter has influence on other system parameters.
These parametes include: Frequency output and current output.
In terms of flow velocity, the meter’s limit are from 0.1 to 12 m/sec.
Moreover the values for Low Flow Cutoff and meter’s limits monitoring
depend on Full Scale Flow.
The full scale flow is valid for both flow directions.
Note: If the flow rate exceeds the full scale setting, an error message
indicates that the configured full scale range has been exceeded.
Low Flow Cut-off
Low Flow Cut-off defines the threshold at which flow measurement will
be forced to zero. The cutoff value can be from 0 % to 9.9 % of the full
scale flow. Increasing the threshold wil
l help prevent false reading
during “no flow” conditions possible caused by vibrations or liquid
fluctuations.
Flow Direction
Flow direction lets you set the meter to measure forward flow only (uni-
directional) or both forward and reverse flow (bidirectional).
Unidirectional means that the flow is totalized in only one direction. The
flow direction is indicated by the arrow printed on the detector label. In
this mode,
the two totalizers T1/T2 can be used as totalizers and
resettable day counters.
Bidirectional means the flow is totalized in both directions. The totalizer
T+ registers forward flow and the totalizer T-totalizes in reverse flow
direction. The net totalizer TN registers total flow and
difference between T+ and T-.
A change of the flow direction can be signalized by the digital outputs.
Damping Factor
The damping factor establishes the stability of the measured flow rate.
Time constant can be set from “none” up to a max. of 30 seconds.
Note: Damping has no influence on the totalizers.
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