Emerson IFT9701 - Manual (Page 56)

48 Model IFT9701 Transmitter Instruction Manual
Configuration with ProLink II Software continued
4. In some sensor installations, noise caused by mechanical sources, such as valves and motors,
can affect flowmeter output signals. The flow cutoff filters out noise by defining the measured
value below which the milliamp output indicates zero flow.
The flow cutoff is the lowest flow rate at which the meter produces a nonzero output signal. If
flow drops below the cutoff:
- The pulse output goes to 0 Hz
- The internal totalizer stops counting
- The meter indicates zero flow during polling from a host controller
A default flow cutoff is entered into the flowmeter at the factory. This number can be adjusted
to achieve the filter effect described above. Enter a new value, if desired, into the Flow Cutoff
text box in the Flow panel.
5. The configured flow direction (forward, reverse, or bi-directional) determines how flowmeter
outputs and totalizers will react when fluid flows through the meter.
The flow direction arrow on the meter is considered the “forward” flow direction, but the
meter measures flow accurately in either direction. Table 7-2 lists how outputs and totalizers
are affected by the option that is chosen.
To configure flow direction for outputs and totalizers, open the Flow Direction list box in the
Flow panel and select the desired setting.
Table 7-1 Measurement units for mass and volume flow
Mass flow unit Software label Volume flow unit Software label
grams/second
grams/minute
grams/hour
kilograms/second
kilograms/minute
kilograms/hour
kilograms/day
metric tonnes (1000 kg)/minute
metric tonnes (1000 kg)/hour
metric tonnes (1000 kg)/day
pounds/second
pounds/minute
pounds/hour
pounds/day
short tons (2000 pounds)/minute
short tons (2000 pounds)/hour
short tons (2000 pounds)/day g/s
g/min
g/hr
kg/s
kg/min
kg/hr
kg/day
t/min
t/hr
t/day
lb/s
lb/min
lb/hr
lb/day
ton/min
ton/hr
ton/day U.S. gallons/second
U.S. gallons/minute
U.S. gallons/hour
liters/second
liters/minute
liters/hour
Imperial gallons/second
Imperial gallons/minute
Imperial gallons/hour
Imperial gallons/day
cubic feet/second
cubic feet/minute
cubic feet/hour
cubic feet/day
cubic meters/second
cubic meters/minute
cubic meters/hour
cubic meters/day
barrels/second
barrels/minute
barrels/hour
barrels/day USgps
USgpm
USgph
l/s
l/min
l/hr
UKgps
UKgpm
UKgph
UKgpd
cuft/s
cuft/min
cuft/hr
cuft/day
cum/s
cum/min
cum/hr
cum/day
bbl/s
bbl/min
bbl/hr
bbl/day