Dynasonics 901 Series Enhanced Ultrasonic Flow Meter - Manual (Page 24)

Rev.
04/02 -23- D901/M
The FULL SCALE key allows the entry of the highest
anticipated fluid velocity. The entry is made as either FPS
(Feet per Second) or MPS (Meters per Second),
dependent on whether the unit is configured as US units
or Metric units. The FULL SCALE input is used by the
D901/M microprocessor to scale the 4-20mA output and
adjust the resolution of the flow rate display.
Acceptable input range for the FULL SCALE constant is
shown in Table 4.
* Note: FULL SCALE values below 1.5 FPS [ 0.5 MPS]
are not recommended.
Note: If a decimal value is to be entered, enter 0 . X X .
The zero must precede the decimal value and no more
than two numbers should be entered after the decimal
value.
Note: If an entered value is out of the acceptable range of
the instrument, a RANGE! indication will be displayed.
The meter will not allow any additional entries to be made
until a legitimate value is entered.
Two useful equations which relate volumetric flow in round
pipes to flow velocity are as follows:
FPS = U.S. GPM X 0.409
ID
2
(inches)
MPS = LPM X 21.23
ID
2
(mm)
I.D. US METRIC
Max 40 FPS 8 MPS
Min * n/a n/a
Table 4
PART 3 - STARTUP AND CONFIGURATION
Full Scale Input
Important!
Volume to Velocity
Conversion