Model FT2 101364
FLOW PARAMETER 1
SIM UNT PRM EXIT
F1 F2 F3 F4
Then press PRM (F3) key:
FLOW PARAMETER 2
CAL SPC PRM EXIT
F1 F2 F3 F4
Note: The CAL and SPC function key will only appear and be accessible from a Level 2
password.
Then press PRM (F3) key:
CUTOFF = 2.0 SCFM
CHG OK
F1 F2 F3 F4
Enter the value for the percent low flow cutoff and then press OK (F4) key.
When the flow rate falls below the zero flow cutoff, the flowmeter will display a flow value of
zero.
A^2 = 0.05672 Ft^2
CHG OK
F1 F2 F3 F4
Enter the pipe area in square meters or square feet and then press OK (F4) key.
Use square meter for metric flow unit selection and square feet for English flow unit selection.
FILTER = 0.8
CHG OK
F1 F2 F3 F4
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.
Page 40 Fox Thermal Instruments, Inc., 399 Reservation Road, Marina, CA 93933
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