Seametrics FT520 v.1 - Manual (Page 3)

3 of 4
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.
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
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. Pressing the Start/Stop key starts the batch
by energizing Relay 1. The indicator for Relay 1 will 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
should go out before the end of the batch, at the prewarn
set point.
The batch will continue on to the set amount unless it is
halted in the middle by pressing the Start/Stop key again.
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
AR
CH
IVE
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