Seametrics FT520-84 Instruction Manual
FT520-84 Regeneration
Control Instructions
General Information
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
accumulated flow, as well as programmable pulse output
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,
depending on the requirements of the regeneration valve
being used.
A programmable pulse output can be used as needed to
control a chemical metering pump, for controlled chemical addition to the water stream.
Specifications
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
V olume 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)
Regeneration volume
counts down
SET REGEN. VOL.
1000.00 GAL
Regeneration
initiation
Chemical pump
pulse LED
LT-10830-C
Page 1 of 4
Installation
Wall Mounting. Using the four screws provided, attach
the two foot brackets to the sides of the enclosure. Then
attach the unit to any secure surface by inserting 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
back side. Slide the screws through the four holes drilled
in the panel, and into the threaded holes in the housing.
Tighten until the gasket is firmly compressed against the
panel.
Expose T erminals. Remove the four 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 for
easier access, by gently tugging on them.
Caution: When the control is
powered up, relay or analog outputs may be present. If this
!
Sensor Connection. Follow the “Connections” diagram
to connect either two or three wires from the flow meter
or flow sensor.
could be a hazard, wait to make
external connections until programming is complete.
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.
Displays
SETTINGS
FLOW
SET
RATE
SET DECIMAL
SET
SET K-FACTOR
SET
SET PULSE OUT
SET
.00 GAL
SET 20mA RATE
SET
0.00 GPM
SET REGEN. VOL.
SET
1000.00 GAL
SET REGEN. TIME
SET
5 SEC'S
SET RELAY MODE
SET
ALTERNATE RELAYS
TO CLEAR TOTAL
SET
PRESS UP & LEFT
return to
SET
operation mode
GAL
MINUTE
0.00 GPM
1.000
OPERATION MODE
0.00 GPM
OR
O.00 GAL
0.00 GPM
O.00 GAL
T
Running
Totalizer
T = Total
Volume
counts down
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
Regeneration Valve Connection. Connect the leads
which initiate the regeneration valve(s) to the terminals
marked Relay 1 and Relay 2. (See “Connections” diagram.) 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 420 mA, 0-10 V or 0-5 V by placing a jumper in the correct 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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Set Flow Rate. Press . 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 units desired. Press to move to the next
menu item.
Set Decimal. Use to select zero, one, or two decimal
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
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