Seametrics FT520 User manual

LT-10606-A
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General Information Specifications
FT520 Batch Flow Processor
Instructions
Power 115/220 VAC, 50/60 Hz,
12-24 VDC
Temperature 32°- 130°F (0°- 55°C)
Enclosure Precision cast aluminum,
NEMA 4X
Batch Outputs Two Form C SPDT relay,
115 VAC 5A max
Max Pulse Output 100 mA at 60 VDC
Memory Type Non-volatile EEPROM
auto-backup
Sensor Power 12 VDC, 10 mA
Totalizer 8 digit
Rate Display 5 digit
Volume Units Gallons, cubic feet, cubic
meters, liters, million gallons
Time Units Seconds, minutes, hours, days
Analog Output 4-20 mA, 0-10 VDC,
opto-isolated
Sensor Input Open collector current sink,
ESD protected
Max Input Frequency 1,000 Hz
Shipping Weight 7 lbs
Features
Easy-read
backlit display
Remote control terminals
(inside housing)
Rugged cast aluminum
housing
(wall or panel mount)
Accessible batch
control buttons
Relay output
indicator LED
Wide choice of
rate/volume units
The FT520 is a batching flow processor with additional
output features. It is designed for use with SeaMetrics
flowmetersandflowsensors,aswellas otherunits which
havefrequencyoutputproportional to flow.Inaddition to
batch function, the FT520 indicates flow rate and
accumulatedtotal inlargedigits on aneasily-readbacklit
display. Units are user selectable, and range from
milliliters per second to million gallons per day.
Batch output is controlled by two relays.The main relay
starts and stops the batch as a set. The auxiliary
“prewarn” relay can be used to operate a second valve,
in order to have a staged shut off at the end of the batch,
for maximum accuracy.
Analog output (4-20 mA, 0-10 VDC) is included for
applications requiring it, such as flow rate logging.Two
programmable pulseoutputsare also standard, and can
be used, for example, to provide proportional chemical
feed with a pulse-responsive metering pump.
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Installation
Wall Mounting. Usingthe eightscrewsprovided,attach
the two foot brackets to the sides of the enclosure.Then
attachtheunit to any secure surface byinserting screws
through the mounting holes in the foot brackets.
Panel Mounting. Follow the dimensions for “Panel
Cutout” to cut a hole in the panel. Slide the panel mount
gasket up from the bottom of the enclosure to its place
behind the panel mount flange. Insert the unit through
the panel cutout. Install the two panel mount brackets
on the sides of the unit using the eight screws provided.
Each bracket has one threaded center hole. Insert and
tighten one screw in each hole, until the flange is pulled
firmlyupagainstthepanelandthegasketiscompressed.
ExposeTerminals. Removethe four screwswhich hold
the front plate to its flange.Remove the front plate.The
display board is attached to this front plate. It is also
connected to the power board by a ribbon cable. For
convenience, this cable can be disconnected, or the
display board can be allowed to dangle while making
connections. Connections can be made inside the
enclosure, or the terminals can be unplugged for easier
access, by gently tugging on them.
Sensor Connection. Followthe“Connections”diagram
to connect either two or three wires from the flow meter
or flow sensor.
Batch Control Connection.Connect the valveor other
device(s) to be controlled for starting and stopping the
batch to the appropriate relay terminals. Note: if the
staged shutoff (“prewarn”) will not be used, connect to
relay one only.Relay 1 remains energized for the entire
batch cycle. If a staged shutoff is desired, connect the
main valve to Relay 2 (early shutoff) and the low-flow
valve to Relay 1.
Power Connection. Connect AC or DC power as
desired to the appropriate terminals. For safety, if using
AC power, be sure to connect the ground terminal
provided to a good earth ground.
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Displays
Settings
Batch Setting. These functions are covered under
operation.When first setting up the FT520, skip down to
Flow Rate and K-Factor, which must be set before
batching can be done.
Set Flow Rate. Use to select volume units.Use
to select the particular unit desired (gallons, liters, etc.).
Then use to switch to time units. Again, select the
one desired.
SetDecimal. Use toselect zero,one, ortwo decimal
places on the flow units.
Set K-Factor. The unit will not function properly until
this number is entered. It is simply the number of pulses
which the flow meter or flow sensor puts out per gallon
of liquid. It is marked on the Model/Serial tag of
SeaMetrics flow meters and flow sensor fittings. On
adjustableflow sensors, the K-factormustbe taken from
Caution: When the control is
poweredup,relay or analog out-
puts may be present. If this
could be a hazard,wait to make
external connections until pro-
gramming is complete.
!
Replace the front panel, taking care to reconnect the
ribbon cable if it has been disconnected. When power
is switched on, the display should light up immediately
with meaningful letters or digits.
0 GPM
0 GPM
O GAL
0 GPM
O GAL
B
T
SETTINGSOPERATION MODE
SET BATCH SIZE
123 GAL
SET
SET SET PREWARN SIZE
123 GAL
SET
SET
SET
SET
SET
SET
SET
SET DECIMAL
0.00 GPM
SET K-FACTOR
123.456
SET PULSE OUT
123 GAL
TO CLEAR TOTAL
PRESS UP & LEFT
SET 20mA RATE
0.00 GPM
GAL
MINUTE
FLOW
RATE
return to
operation mode
Bar
Graph
Batch
Running
Totalizer
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Connections
the chart in the flow sensor instructions, based on pipe
size. Set the number with keys.The digit which
is underlined is the one being set. The moves one
digit to the left. The increases the digit. When the
appropriate number has been set, press again to
move on to the next menu item.
Set Pulse Out. An output pulse is activated at the
selected volume intervals if this feature is in use.
Otherwise, it does not need to be set.
Set 20 mA Out. A 4-20 mA analog output is standard
on this unit. If a 4-20 mA current loop is connected, set
the flow rate, in the desired units, at which the peak 20
mA is desired.The controller will automatically scale the
4 mA output to zero flow.
ClearTotal. This function resets the running total back
to zero. It is unrelated to the regeneration function, and
canbe ignoredunless it isneeded.To resetto zero,press
and simultaneously, as instructed.
Operation
Set Batch Size. Set the batch size for the desired
number of units, using and keys.If the staged
shut-off feature is not being used, this is the only setting
required for the batch.
Set Prewarn. This is only used for a staged shut-off.
The number set is the number of units early (before the
end of the batch) that Relay 2 will shut off.
Start Batch. PressingtheStart/Stop keystartsthe batch
byenergizing Relay 1.Theindicator forRelay1will light,
indicating normal operation. The indicator for Relay 2
may also light, depending on the prewarn setting. If
staged shut-off is being used, the Relay 2 indicator light
shouldgo out beforetheend of thebatch, at theprewarn
set point.
The batch will continue on to the set amount unless it is
haltedin themiddle bypressingthe Start/Stop keyagain.
Pulse 1
Alternate
low-voltage power 12-24 VDC
Pulse 2
Relay 2
Relay 1 NC COM
NO
NC
NO
COM
Batch Outputs
Line
Neutral
Ground
Resume
0-10 V
Sensor input
Analog
Outputs
4-20 mA
External Power
Internal Power
Start/Stop
–
+
–+
s1
+
–
s2
RESUME
COM
BATCH
Remote
Controls
Pulse Outputs
(for metering pumps)
Main
power fuse
250 mA DC Power fuse
1 Amp
Power
loop power
jumper
Ribbon connector
from display board
Meter
Ground
Power signal
RED
WHITE
BLACK
Dry contact
–
+
Relay Pulse
10 Amp
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Stop Batch/Resume Batch. Pressing the Start/Stop
key anywhere in the batch will stop it. It will remain
stopped until the Resume key is pressed. Pressing the
Resume key allows the batch to restart and go through
to the end.
Choice of Displays for Batching. When in Operation
Mode, press to change the type of display.Running
Totalizer (“T”) accumulates a Total Flow until it is reset.
Batch (“B”) accumulates the flow of the present batch
only, then resets. Bar Graph (“❚”) graphically indicates
from left to right, how much of the batch has already
accumulated.
Repair
Theonly field-repairablecomponent on the FT520 isthe
fuse. If failure is due to a cause other than a blown fuse,
itis necessary to replacethe entire board stack. Contact
your distributor for information.
20419 80th Ave. So., Kent, WA 98032 USA
Phone: [phone] Fax: [phone]
www.seametrics.com 1-800-975-8153
Staged Shut-off Application
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TX Flow Sensor
High-Flow
Valve
Low-Flow
Valve
Tank
FT520
Panel cut-out dimensions
6.00"
gasket
PANEL
CUTOUT
6.00"
High-Flow Valve
Low-Flow Valve
Relay 1
Relay 2
NC
COM
NO
NC
NO
COM
Connection for Staged Shut-off
Caution: Always disconnect
power to the unit before opening
the terminal cover. Do not recon-
nect power until all connections
have been made and the terminal
cover has been replaced.
!
Fuses. The power supply and the analog output circuit
have fuse protection. The two fuses are on the board.
Replace the blown power fuse with a 250 mA, 5x20 mm
glass fuse, available from SeaMetrics or from Radio
Shack (or other electronic supply store). The DC power
fuse is a 1 Amp, 5x20 mm glass fuse.
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