FT430/440/450 INSTRUCTIONS
Seametrics • 253.872.0284 Page 3 seametrics.com
GENERAL INFORMATION
Specications*
The FT430/440/450 ow computers are microcontroller-
based indicator/transmitters that interface with pulse
output ow sensors to compute and display ow rate, ow
total, and also generate output signals representing ow.
The FT430 and FT450 have one scaled pulse output and
one pulse pass through. The FT440 has two scaled pulse
outputs. Galvanic isolation is provided for most pulse
outputs.
The FT450 is battery powered while the FT430 may be
powered by an external DC power source or an optional
internal AC power supply*. The FT440 is a “two-wire” or
“loop powered” device, meaning that it is powered by the
4-20 mA loop circuit itself. An optional internal AC power
supply* is available for the FT440 with dual 24 and 12VDC
outputs to power both the loop and sensors requiring
more power than the loop can supply.
Pulse and 4-20mA analog outputs can be used to signal
external devices, e.g. certain metering pumps and water
treatment controls. Alternatively, one or more pulse
outputs can be congured as alarm outputs. These ow
computers can be password protected to prevent resetting
the total or changing conguration settings.
The FT430/440/450 meters are available in wall and meter
mount congurations. The FT430 and FT440 models
can also be panel mounted. Some congurations can
be converted from wall to meter or meter to wall after
installation if needed. Consult factory for details.
Order the FT440 only if a 4-20mA output signal is a
requirement and the FT450 if internal battery power is
needed. Otherwise the FT430 offers the most exibility.
*Internal power supply is available for the wall mount option only.
FT440 FT450FT430
Power 7-30Vdc, 4mA 7-30Vdc, 4mA (4-20 mA when
loop-powered)
Lithium “C”, 3.6Vdc, replaceable. Life is
~5 years depending on usage.
Display Rate 5-digit autorange 5-digit autorange 5-digit autorange
Total 8-digit 8-digit 8-digit
Units Rate Units Gallons/Second/Minute/Hour/Day, Liter/Second/Minute/Hour/Day, Cubic Feet/Second/Minute/Hour/Day, Cubic Meters/
Second/Minute/Hour/Day, Miner’s Inch, Mega Liters/Day, Million Gallons/Day, Fluid Oz/Second/Minute/Hour/Day
Total Units Gallon, Gallon x 1000, Liters, Mega Liter, Cubic Meter, Acre Feet, Cubic Feet,
Cubic Feet x 1000, Million Gallon, Miner’s Inch Day, Acre Inch, Fluid Ounce
Outputs Pulse Output 1 Scaled pulse output, high alarm output or low alarm output. Optoisolated on FT430 and FT440.1
Pulse Output 2 Pulse pass through Scaled pulse output, high alarm
output or low alarm output.1Pulse pass through
Loop Power
Output N/A 4-20mA Loop N/A
Set P Range 0.1 - 99999.9 units/pulse 0.1 - 99999.9 units/pulse 0.1 - 99999.9 units/pulse
Input 5V pulse or contact closure 5V pulse or contact closure Micropower GMR Sensor
(square wave)
Input Range 0.752 - 2000Hz 0.752 - 2000Hz 0.752 - 550Hz
K-Factor Range .001 - 999999.999 .001 - 999999.999 .001 - 999999.999
Flow Alarm Output
Range 0.1 - 99999.9 0.1 - 99999.9 0.1 - 99999.9
Operating Temperature 0˚ to 55˚ C (-32˚ to 131˚ F) 0˚ to 55˚ C (-32˚ to 131˚ F) 0˚ to 55˚ C (-32˚ to 131˚ F)
Non-Operating
Temperature -40˚ to 75˚ C (-40˚ to 158˚ F) -40˚ to 75˚ C (-40˚ to 158˚ F) -40˚ to 75˚ C (-40˚ to 158˚ F)
Environmental NEMA 4X, IP67 NEMA 4X, IP67 NEMA 4X, IP67
Regulatory Mark Mark Mark
* Specications subject to change • Please consult our website for current data (www.seametrics.com).
1 Scaled output pulses have a xed width of 100ms. Maximum pulses per second is 6.5Hz
2 For pulse frequencies <1 Hz, increase setting in SET F menu to 3 or higher.
