16 Advanced functions
FLUXUS G809
16.3 Cut-off flow
135
UMFLUXUS_G809V2-2EN, 2020-06-25
16.3
Cut-off flow
The cut-off flow is a lower limit for the flow velocity. All measured flow velocities that are lower than the limit and their de
-
rived quantities are set to zero.
The cut-off flow can depend on the flow direction. The cut-off flow is set in
Special Funct.\SYSTEM settings\
Measuring\Cut-off Flow
.
• Select
sign
to define a cut-off flow depending on the flow direction. One limit is set for the positive and negative flow
velocity.
• Select
absolut
to define a cut-off flow independent of the flow direction. A limit is set for the absolute value of the flow
velocity.
• Press ENTER.
• Select
factory
to use the default limit of 2.5 cm/s (0.025 m/s) for the cut-off flow.
• Select
user
to enter the cut-off flow.
• Press ENTER.
If
Cut-off Flow\sign
and
user
are selected, 2 values have to be entered:
• Enter the cut-off flow.
• Press ENTER.
All positive values of the flow velocity smaller than this limit are set to zero.
• Enter the cut-off flow.
• Press ENTER.
All negative values of the flow velocity greater than this limit will be set to zero.
If
Cut-off Flow\absolut
and
user
are selected, only one value have to be entered:
• Enter the cut-off flow.
• Press ENTER.
All absolute values of the flow velocity smaller than this limit are set to zero.
Special Funct.\SYSTEM settings\Measuring\Cut-off Flow
Special Funct.\...\+Cut-off Flow
Special Funct.\...\-Cut-off Flow
Special Funct.\...\Cut-off Flow
