F1 F2 F3 F4
F1 F2 F3 F4
F1 F2 F3 F4
Then press
PRM (F3)
:
Enter the value for the percent low flow cutoff and then press
OK (F4)
.
When the flow rate falls below the zero flow cutoff, the flowmeter will
display a flow value of zero.
Enter the pipe area in
square meters
or
square feet
and then press
OK
(F4)
.
Use square meter for metric flow unit selection and square feet for
English flow unit selection.
The filter value
is also referred to as a dampening factor and is used to
quiet the readings. The filter value is an exponential filter that dampens
the noise and is used as follows:
Flow Value = (FA * new value) + (FB * average)
Where FA = filter value, FA + FB is equal to 1.0.
A lower filter value will increase dampening of the flow rate and smooth
the reading. A lower filter value will also slow the meter’s response. For
example, if we enter a filter of 0.8, the weight ratio for new average is:
New average = (80% new sample) + (20% last average)
Filter range is 0.01 to 1.0, 0.01 being a high filter value
and 1.0 = no filter.
Enter the filter value and then press
OK (F4)
.
CUTOFF = 2.0 SCFM
CHG OK
FILTER = 0.8
CHG OK
A^2 = 0.05672 Ft^2
CHG OK
43
Operation: Programming
Programming
Using
the Local Display