Seametrics FT400 Configuration guide

Features
FT400 Flow Computer
Instructions
PUB -19081-1095
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Power 11-28 VDC, 20mA max.
24-28 VDC
Flow Sensor Power 8 Volts DC, 50 mA maximum
Temperature 0°C to 70°C
DisplayCustom 8-digit LCD,
0.4" digits
Totalizer 8-digit resettable
(non-reset optional)
Rate Indication 8-digit with autorange
K Factor Range .050 - 1999.999
Pulse Output Range0.1 - 99,999.9 gallons per
pulse
Pulse Output 0.1-second open-collector
transistor, 100 mA, 60 VDC
maximum
Analog Output
(Optional) 4-20 mA isolated 24VDC, 500
Ohm maximum
Analog Output
Resolution 500 counts full scale
Sensor Output 100 mA, 60 VDC maximum
SpecificationsGeneral Information
The SeaMetrics FT400 is a compact digital flow monitor
with user-programmed output features.Combined with
anIPSeriesinsertionflowsensororaWTturbinemeter,
it is ideal for flow rate and total indication, chart record-
ing, and proportional chemical feed.It is available in wall
orpanel-mountenclosures,or in a round cast-aluminum
housing mounted directly on a SeaMetrics meter.For
wall-mounting,the non-metallic enclosure is splashproof
and has a clear cover.The housing for panel mounting
isstandard1/4 DIN-sized, with gasketed front panel and
membrane switches.
An eight-digit totalizer is resettable, unless ordered with
non-reset option.Programming prompts simplify set up
by indicating the next step.Pulse output is a program-
mable 0.1 second open-collector transistor pulse, which
is compatible with electronic metering pumps, PLC's,
computer input cards, and SeaMetrics controls.An op-
tional 4-20 mA output feature is front-panel program-
mable in standard flow rate units.
RESET RATE/TOTAL
+
PROGRAM
-
FT400
SETP
400.0
ResetTotalizertoZero
(Non-resettableoptional) SwitchesbetweenRateand
TotalDisplays(Alsorespondsto
magnetoutsideenclosure)
Selectable
decimal
point
Presstochange
settings:
•K-factor
•PulseOutput
•4-20mA(optional)
Promptsappear
whenprogram
buttonispushed.
"SETP"means
setpulseoutput
ingallonsper
pulse.
Otherprompts:
•SETK(meterfactor)
•SET20mA(optional)
•SETDP(totalizer)
Buttonsincrease
ordecreasesetting
Seaflow
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Installation
FT400W: Wall Mounting. Four 3/16" screw holes are
locatedatthebottomofthefrontcoverscrew holes. Mark
the locations through the holes, then drill. Slip screws
down the holes and tighten.
FT400P: Panel Mounting. Use the dimensions on the
back page for making the panel cutout.Locate the dove-
tail mounting bracket grooves on the side and the top of
the unit. After cutting out the panel, break any sharp or
rough edges, then slip the panel gasket in place behind
the FT400 bezel and slide the unit through the panel
hole. Install the mounting brackets in their dovetail
grooves, with the slots of the clamping screws facing
out.Tighten the screws to pull the unit tightly against the
panel and compress the gasket slightly.
Connections
FT400M: This unit is pre-wired with 18 ft. of four-con-
ductor cable. See diagram for color coding of the leads.
If desired, the cable supplied can be removed, and con-
nections can be made inside the unit, following the Con-
nections diagram.
FT400W: This unit is ordinarily supplied without pre-
wiring. To reach the terminals, remove the front clear
cover, then remove the front panel.Turn the front panel
over, with the circuit boards still attached. Follow the
Connections diagram.
Note the polarity of the Pulse Output terminals.Be sure
to observe proper polarity when connecting to an elec-
tronic metering pump. If the pump does not respond to
the pulse output, try switching polarity.
Sensor Out terminals are provided for passing on the
signal from a flow sensor to a second electronic device.
They do no need to be connected unless using such a
device.
FT400P: All of the instructions for the FT400W apply
except those regarding access to terminals.Toreachthe
terminals, remove the four screws which hold the back
cover of the housing in place.
Analog Output Board. The optional 4-20 mA output
uses a third printed circuit board which plugs into the
terminal connection board.Thisboardispre-wiredatthe
factory with a jumper, so that powering the FT400
automatically provides power to the current loop. If an
isolated 4-20 mA output is required (see Connections) it
is necessary to remove the jumper and rewire as shown
in “Analog Output - Isolated”.
Programming
Set K-Factor. To begin programming, press the PRO-
GRAM key. The prompt SET K should appear. The K-
factor is the number of pulses per volumeunit.Thisnum-
ber is provided with SeaMetrics meters, in pulses per
gallon.If the FT400 is to read in other units, the number
provided with the meter must be converted.The FT400
will then totalize in the selected units, and the rate read-
ingwill be in those unitsperminute.The rateis always in
units per minute. It is not possible to totalize in one unit
and read rate in units per hour or per second.
To enter the K-factor, press the “+” or “-” keys until the
desired number is reached.
Set Pulse Output. PressingPROGRAMa second time
brings up the prompt SET P. This setting controls the
pulseoutput,ifitis being used.It is set inunitsperpulse.
For example, if the FT400 is reading in gallons, a setting
of 2.00 means that a pulse will occur every 2 gallons.
Settingsmay be as small as 0.1, which means that there
is a pulse every 0.1 units.
!
Caution: If pulse output is being
usedtocontrolan external device,
such as a metering pump, do not
connect the pulsed device until
programming is completed. If malfunction or in-
correct programming of the pulse output could
causepersonalinjuryor property damage,sepa-
ratesafeguardsmustbe installedtopreventsuch
injury or damage.
(+ )12VDC to power supply
(-) 12VDC to power supply
(+ ) pulse output
(-) pulse output
Red (+ )12VDC to power supply
Black (-) 12VDC to power supply
Blue (+ ) 4-20 mA
Orange (-) 4-20 mA
Standard Unit:
With Analog Option:
Red
Black
Green
White
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IP SENSOR
Standard Connections
DC Power
RED
BLACK
RED
WHITE
BLACK
SIG
-
-
+
+
SENSOR
INPUT
-
-
+
+
SENSOR
OUT
PULSE
OUT
METERING PUMP
To 2nd FT400
or control
GREEN
WHITE
+ -
OPTIONAL 4-20mA
CURRENT LOOP
IP SENSOR
CHART RECORDER
Analog output - Non-Isolated
DC Power
RED
BLACK
RED
WHITE
BLACK
METERING PUMP
To 2nd FT400
or control
GREEN
WHITE
Blue +
Orange -
Analog output - Isolated
IP SENSOR
CHART RECORDER
METERING PUMP
To 2nd FT400
or control
-
-
+
+
SENSOR
OUT
PULSE
OUT
-
+
+
-
OPTIONAL 4-20mA
CURRENT LOOP
24
VDC
DC Power
IN
12V IN
24V IN
+
SIG
-
-
+
+
SENSOR
INPUT
-
-
+
+
SENSOR
OUT
PULSE
OUT
IN
12V IN
24V IN
+
SIG
-
-
+
+
SENSOR
INPUT
IN
12V IN
24V IN
+
Note: Unit can accept either
"12 VDC" (11-18VDC) or
"24 VDC" (24-28 VDC) power.
Be careful to use the appropriate
terminals for your power supply.
Note: Unit can accept either
"12 VDC" (11-18VDC) or
"24 VDC" (24-28 VDC) power.
Be careful to use the appropriate
terminals for your power supply.
Note: Unit can accept either
"12 VDC" (11-18VDC) or
"24 VDC" (24-28 VDC) power.
Be careful to use the appropriate
terminals for your power supply.
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20419 80th Ave. So., Kent WA. 98032 USA
Phone: [phone] Fax: [phone]
www.seametrics.com 1-800-975-8153
Operation
In normal operation the FT400 displays rate or total.
Pressing RATE/TOTAL alternates from one to the other.
This can also be accomplished from outside the unit by
touching a magnet to the outside of the case in the gen-
eral vicinity of the RATE/TOTAL key.When rate is show-
ing, total continues to accumulate. Unless the unit has
theNR(non-reset) option, pressing the RESET keysets
total to zero. If it is pressed inadvertently, total can be
brought back by pressing again within two seconds.To-
tal is stored in nonvolatile memory and is kept on loss of
power, althoughtheunitwillnot operateduring thepower
outage.
Repair
The only field-repairable component on the FT400 is
the fuse.The fuseholder is found on the back of the cir-
cuit board stack.Replace with a Littlefuse 3AG 1/2-Amp
or equivalent automotive-type fuse.
On units with the 4-20 mA option, it is necessary to re-
move the analog board at the back of the stack to reach
the fuse. Unplug the board by gently tugging on it. On
somemodels,itisalsonecessary to removefour screws
to get the analog board loose.
If failure is due to a cause other than a blown fuse, it is
necessaryto replace the entireboardstack.Contactyour
distributor for information.
Set 4-20 mA Span. If the optional 4-20 mA board is in-
stalled,thepromptSET20mAwillappear.Setthisvalue
to the flow rate, in units per minute, at which the full 20
mA output is desired. Zero flow will automatically be
scaled to 4 mA.
Set Decimal Point. Pressing PROGRAM again brings
up SET DP. Choices are one decimal place or none.
Pressing the +/- keys alternates between the two.Typi-
cally, a decimal place is only required with low-flow
meters. Exit programming mode. Pressing rate/totalizer
button returns unit to operating state.
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