Seametrics FT520-84 v.1 - Manual (Page 3)

3 of 4
Connections
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.
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
the desired amount using the
and keys.
Set Regeneration Time. This is the length of time, in
seconds that the relay remains energized to initiate
regeneration. Using the
key, set for a bit over the
minimum time required by the regeneration valve to begin
a cycle.
Set Relay Mode. Choose between single relay (Relay
No. 1) and dual relay (Alternate Relays) operation, using
the
key. In alternate relay mode, the first regeneration
will use relay 1, and the next will use relay 2, and so on.
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, as instructed.
Operation
Choice of Displays. When all of the settings have been
entered, the next press of the Set key puts the unit in
operation. If a T appears at the left side of the display,
the values shown are flow rate and running total. If there
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
the
key to choose the preferred display, usually
regeneration quantity.
Regeneration Initiation. When the regeneration quantity
number first reaches 0, relay 1 energizes for the length
of time which has been set. The regeneration quantity
immediately resets to its setting 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 returns to relay 1.
Pulse 1
Alternate
low-voltage power
12-24 VDC
Pulse 2
Relay 2
Relay 1
NC
COM
NO
NC
NO
COM
Regeneration
Initiation
Line
Neutral
Ground
Resume
0-10 V
Sensor input
Analog
Outputs
4-20 mA
External Power
Internal Power
Start/Stop
–
+
– +
s1
+
–
s2
RESUME
COM
REGENERATION
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
AR
CH
IVE
D