Seametrics FT520 User manual

LT-10606A
Page 1 of 4
General Information Specifications
FT520 Batch Flow Processor
Instructions rev. b
Power 115 VAC (220 VAC optional),
50/60 Hz;12 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, 0-5 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,aswellasotherunitswhich
havefrequency output proportionaltoflow. Inadditionto
batch function, the FT520 indicates flow rate and
accumulatedtotalin large digitsonaneasily-readbacklit
display. Units are user selectable, and range from
milliliters per second to millions of 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,
inorder tohavea stagedshutoffat theendof thebatch,
for maximum accuracy.
Analogoutput(4-20mA, 0-10 VDC,0-5VDC)isincluded
for applications requiring it, such as flow rate logging.
Twoprogrammable pulse outputs arealsostandard,and
can be used, for example, to provide proportional
chemical feed with a pulse-responsive metering pump.

Installation
Wall Mounting. Usingthe four screwsprovided,attach
the two foot brackets to the sides of the enclosure. Then
attachthe unit toanysecure surface byinsertingscrews
through the mounting holes in the foot brackets.
Panel Mounting. Follow the dimensions given for
“PanelCutout”. Besure to includethe four cornerscrew
holes. After cutting and drilling, place the front plate on
the front side of the panel with its gasket against the
panel, and the remainder of the square housing on the
backside. Slide thescrewsthroughthe four holesdrilled
in the panel, and into the threaded holes in the housing.
Tighten until the gasket is firmly compressed against
the panel.
Expose Terminals. Removethefour screws which 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, while
making connections. Connections can be made inside
the enclosure, or the terminals can be unplugged by
gentle tugging for easier access.
Sensor Connection. Follow the“Connections”diagram
to connect either two or three wires from the flow meter
or flow sensor.
Batch Control Connection. Connectthevalveor 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.
Analog Connection. This output can be configured 4-
20mA, 0-10 Vor0-5 V byplacingajumper inthecorrect
position on the analog header. The swith next to the
headerselectsactive (powered) orpassive(unpowered)
output. Whenusing the 12VDCpowered inputyoumay
only select passive output.
Power Connection. Connect AC or DC power as
2 of 4
desired to the appropriate terminals. For safety, if using
AC power, be sure to connect the ground terminal
provided to a good earth ground. If using 12 VDC, use
a PC1 (part # 05040) or equivalent 12 VDC 500 mA
power supply.
Replace the front panel, taking care to reconnect the
ribbon cable if it has been disconnected. When power is
switchedon, the display shouldlightupimmediately with
meaningful letters or digits.
Caution: When the control is
powered up, relay or analog
outputs may be present. If this
could be a hazard, wait to make
external connections until pro-
gramming is complete.
!
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
Settings
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.
Set Flow Units. Use to select volume units. Use
to select the particular unit desired (gallons, liters,
etc.). Then use to switch to time units.Again, select
theunitdesired. Press toadvanceto the next menu.

3 of 4
Connections
Set Decimal. Use toselectzero,one,ortwodecimal
places on the flow units. Press to advance to the
next menu.
Set K-Factor. The unit will not function properly until
thisnumberisentered.TheK-factorissimplythenumber
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, theK-factormustbe taken from
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. If a
pulse output is not needed, pulse out does not need to
be set. Press to move on to the next menu item.
Set 20 mA Out. The “SET 20mA RATE”programs the
flow rate at which the output is 20 mA, 5 V or 10 V. Use
and to set the maximum flow rate for full scale
output. Press for next menu item.
Clear Total. This function resets the running total back
to zero. It is unrelated to the regeneration function, and
can be ignored unless it is needed. To reset to zero,
press and simultaneously. Press to return
to batch mode.
Operation
Start Batch. Pressingthe Start/Stop key starts thebatch
byenergizingRelay 1.Theindicator for Relay1willlight,
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
shouldgoout before the endofthebatch,at the prewarn
set point.
The batch will continue on to the set amount unless it is
haltedinthemiddlebypressingtheStart/Stopkeyagain.
Pulse 1
Alternate
12 VDC power
Pulse 2
Relay 2
Relay 1 NC COM
NO
NC
NO
COM
Batch Outputs
Line
Neutral
Ground
Resume
0-5 V or
0-10 V or
4-20 mA
Sensor Input
Start/Stop
–
+
–+
s1
+
–
s2
RESUME
COM
BATCH
Remote
Controls
Pulse Outputs
(for metering pumps)
Main
power fuse
250mA
part # 26926
AC Power
Ribbon connector
from display board
Meter
Power signal
RED
BLACK
Dry contact
Customer Supplies
1A Fuse
Ground
A
B
An Output
A
P
Passive
Active
Jumpers
5V
10V
4-20mA
PC1 power supply
P/N 05040
WHITE
Analog Switch
Analog Header

20419 80th Ave. So., Kent, WA 98032 USA
Phone: [phone] Fax: [phone]
www.seametrics.com 1-800-975-8153
Staged Shut-off Application
4 of 4
TX Flow Sensor
High-Flow
Valve
Low-Flow
Valve
Tank
FT520
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.
!
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
Start/Stop key again allows the batch to restart from
zero.
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-repairable componentonthe FT520 isthe
fuse. Iffailure isdueto a causeother than ablownfuse,
itisnecessary to replacetheentireboardstack. Contact
your distributor for information.
High-Flow Valve
Low-Flow Valve
Relay 1
Relay 2
NC
COM
NO
NC
NO
COM
Power
Source
Conection for Staged Shut-off
5.50"
gasket
PANEL
CUTOUT
5.50"
6.03"
6.03"
1/4" holes (4 required)
Panel Cut-out