Seametrics FT520-84 User manual

LT-10830-C
Page 1 of 4
General Information Specifications
FT520-84 Regeneration
Control Instructions
Power 115 VAC (220 VAC optional)
50/60 Hz; 12-24 VDC
Temperature 32°- 130°F (0°- 55°C)
Enclosure Precision cast aluminum,
NEMA 4X
Initiation 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
Output Time 1-999 Seconds
Analog Output 4-20 mA, 0-5 VDC, 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)
Chemical pump
pulse LED
Regeneration
initiation
Regeneration volume
counts down
The FT520-84 is a version of the SeaMetrics flow
processor specially designed for regeneration control.
On the input side, it can be used with SeaMetrics flow
sensors and meters, as well as with water meters from
other manufacturers. The output can be used to initiate
regeneration in a variety of one-tank and two-tank water
treatment systems. In addition to the regeneration
functions, this unit features displays of flow rate and
accumulatedflow, aswellasprogrammable pulseoutput
and a 4-20 mA analog output, for use with remote
recorders.
There are two regeneration relays, which can be used
for alternating regeneration of two tanks. The outputs
remain on for a duration programmed by the user,
dependingon therequirements ofthe regenerationvalve
being used.
Aprogrammable pulse outputcan be usedas needed to
control a chemical metering pump, for controlled chem-
ical addition to the water stream.
SET REGEN. VOL.
1000.00 GAL

Installation
Wall Mounting. Usingthe four screwsprovided, attach
the two foot brackets to the sides of the enclosure. Then
attachthe unit toany secure surfacebyinserting screws
through the mounting holes in the foot brackets.
Panel Mounting. Follow the dimensions given for
“Panel Cutout”. Be sure to include the four corner screw
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 thescrews throughthefour holesdrilled
in the panel, and into the threaded holes in the housing.
Tighten until thegasket is firmlycompressed against the
panel.
Expose Terminals. Removethe fourscrews whichhold
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 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.
Regeneration Valve Connection. Connect the leads
which initiate the regeneration valve(s) to the terminals
marked Relay 1 and Relay 2. (See “Connections” dia-
gram.) If only one unit is being connected, use Relay 1.
(Relay 2 will operate only if “Alternate Relays” mode is
used.)
Analog Connection. This output can be configured 4-
20 mA, 0-10 V or 0-5 V by placing a jumper in the cor-
rect position on the analog header. The switch next to
the header selects active (powered) or passive
(unpowered) output. When using the 12 VDC powered
input you may only select passive output.
Power Connection. Connect AC or DC power as
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Displays
Replace the front panel, taking care to reconnect the
ribbon cable. When power is switched on, the display
should light up immediately with meaningful letters or
digits.
Settings
Set Flow Rate. Press . Use to select volume
units.Use to selecttheparticular unitdesired(gallons,
liters, etc.). Then use to switch to time units.Again,
select the units desired. Press to move to the next
menu item.
Set Decimal. Use toselect zero,one, ortwodecimal
places on the flow units. Press to move to the next
menu item.
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
Caution: When the control is
powered up, relay or analog out-
puts may be present. If this
could be a hazard, wait to make
external connections until pro-
gramming is complete.
!
0.00 GPM
O.00 GAL
SETTINGS
OPERATION MODE
SET DECIMAL
SET
SET SET K-FACTOR
SET
SET
SET
SET
SET
SET
SET
SET REGEN. VOL.
1000.00 GAL
TO CLEAR TOTAL
PRESS UP & LEFT
SET 20mA RATE
0.00 GPM
return to
operation mode
Running
Totalizer
0.00 GPM
1.000
SET PULSE OUT
.00 GAL
SET REGEN. TIME
5 SEC'S
SET RELAY MODE
ALTERNATE RELAYS
SET GAL
MINUTE
FLOW
RATE
0.00 GPM
O.00 GAL
T
OR
T = Total
Volume
counts down
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 Seametrics PC3 or equivalent 12 VDC 500 mA power
supply.

3 of 4
Connections
SeaMetrics flow meters and flow sensor fittings. On
adjustableflow sensors, theK-factor mustbe taken from
the chart in the flow sensor instructions, based on pipe
size. Set the number with and . The underlined
digit is the one being set. moves one digit to the left
and increasesthe digit. Whentheappropriate number
has been set, press again to move 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,itdoes not needto be set. Press tomove
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 desired for full
scale output. Press for next menu item.
Set Regeneration Volume. This is the volume (in the
units you have selected; typically gallons) at which the
relay energizes to initiate a regeneration cycle. Set to
thedesiredamount using and .Press to move
to the next menu item.
Set Regeneration Time. This is the length of time in
seconds that the relay remains energized to initiate
regeneration. Using ,set forslightly overtheminimum
timerequiredby the regenerationvalve to begin acycle.
Press to move to the next menu item.
Set Relay Mode. Choose between single relay (Relay
No.1) and dualrelay (AlternateRelays) operation, using
. In alternate relay mode, the first regeneration will
use relay 1, the next will use relay 2, and successive
regenerations will switch between the two. Press to
move to the 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
operation mode.
Operation
Choice of Displays. When allof the settings havebeen
entered, the next press of the SET Key puts the unit in
operation. If a T appears at the left side of the display,
thevaluesshown are flow rateand running total. Ifthere
is no T, the values shown are flow rate and units
remaining until regeneration. The total increases with
flow, and the regeneration quantity counts down. Use
tochoose the preferreddisplay,usuallyregeneration
Pulse 1
Alternate
12 VDC power
Pulse 2
Relay 2
Relay 1 NC COM
NO
NC
NO
COM
Regeneration Outputs
Line
Neutral
Ground
Resume
0-5 V or
0-10 V or
4-20 mA
Signal
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
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

19026 72nd Ave South., Kent, WA 98032 USA
Phone: [phone] Fax: [phone]
www.seametrics.com 1-800-975-8153
Connection for Alternating Tanks Panel cut-out dimensions
Alternating Tanks Application
!
Caution: Always disconnect
power to the unit before open-
ing the terminal cover. Do not
reconnect power until all con-
nections have been made and
the terminal cover has been replaced.
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quantity.
Regeneration Initiation. When the regeneration
quantity number first reaches 0, relay 1 energizes for
thelength of timewhich has beenset.The regeneration
quantity immediately resets and begins counting down
again. If alternating mode has been selected, the next
time it reaches 0, relay 2 will energize, and the cycle
after that, will return to relay 1.
An output can be manually forced at any time by
pressing the Start/Stop key. The relay will energize for
the set time, and regeneration volume will return to its
original setting to begin counting down again.
Repair
The only field-repairable component on the FT520 is
the fuse. If failure is due to a cause other than a blown
fuse, it is necessary to replace the entire board stack.
Contact your distributor for information.
5.50"
gasket
PANEL
CUTOUT
5.50"
6.03"
6.03"
1/4" holes (4 required)
Relay 1
Relay 2
NC
COM
NO
NC
NO
COM
Tank 1
Tank 2
Flow Sensor FT520-84
Tank 1 Tank 2