Seametrics FT520 v.2 - Manual (Page 3)

3 of 4
Connections
Set Decimal. Use to select zero, one, or two decimal
places on the flow units. Press to advance to the
next menu.
Set K-Factor. The unit will not function properly until
this number is entered. The K-factor 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 SeaMetrics flow meters and flow sensor fittings. On
adjustable flow sensors, the K-factor must be 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. 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
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