Seametrics FT400 - Manual (Page 2)

Installation
FT400W: Wall Mounting. Four 3/16" screw holes are
located at the bottom of the front cover screw 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. To reach the
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. This board is pre-wired at the
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 volume unit. This num-
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-
ing will be in those units per minute. The rate is 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. Pressing PROGRAM a second time
brings up the prompt SET P. This setting controls the
pulse output, if it is being used. It is set in units per pulse.
For example, if the FT400 is reading in gallons, a setting
of 2.00 means that a pulse will occur every 2 gallons.
Settings may be as small as 0.1, which means that there
is a pulse every 0.1 units.
!
Caution: If pulse output is being
used to control an 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
cause personal injury or property damage, sepa-
rate safeguards must be installed to prevent such
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
2 of 4
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