Seametrics FT500-Series - Manual (Page 7)

> FT522 Usage Monitor
In Usage Monitor Mode, the display indicates one of two con-
figurations: an elapsed time and elapsed flow, or a flow rate
and accumulated total flow (resettable). A time period is set
to monitor for a set maximum total flow. If the total flow is
reached within the set time, an output relay is closed. The
output relay stays latched until the system either resets auto-
matically after the set time, or is reset manually via the Start-
Stop button. A reset condition clears the elapsed time and
flow, but not the accumulated total flow.
The FT522 is a flowmeter monitor with added output and
alarm features. It is designed for use with Seametrics flow
meters and sensors, as well as other units which have a pulse
or frequency output. It displays flow rate and total in large dig-
its on an easily-read backlit display. Units are user selectable
between gallons, cubic feet, and cubic meters. The primary
output of this unit is a user-set alarm relay which signals ex-
cessive total flow within a given time period (up to 48 hours).
This is typically used to detect an elevated usage level in a
cooling tower or potable water application. The dual relays
can be connected to an alarm, autodialer, or any other switch-
controllable device. In addition to the usage alarm, the FT522
has analog output (4-20 mA, 0-5 Vdc or 0-10 Vdc) and pro-
grammable pulse output. These can be used with an external
data logger or to provide proportional chemical feed, using an
externally-controlled metering pump.
Settings
Use Left Arrow and UP Arrow keys to change settings. Press SET
to advance to next menu.
- SET Flow/Rate
Select the particular volume unit desired (gallons, liters, etc.).
Then switch to time units and select the time unit desired
(minutes, hours, etc.).
- SET Decimal
Select none, one, or two decimal places on the flow units.
- 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 depth flow sensors, the K-factor
must be taken from the chart in the flow sensor instructions,
based on pipe size.
- SET Pulse (scaled) Output 1
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.
- SET Pulse (scaled) Output 2
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.
- SET Time Period from 01-48 hours
This is the monitoring period at the end of which the unit will
alarm if total flow has exceeded its setting. Set this monitor-
ing period for 01-48 hours. NOTE: that if the digit to the right
is set to “9”, the digit to the left will only go to “3” This is be-
cause 48 is the maximum setting allowed.
- SET Alarm Reset
Set to automatic or manual.
- SET Alarm Point in Flow (8 digits)
This is the maximum total flow allowed in the time period set
above. Use the same procedure as above to set this value, up
to eight digits. The units are those previously chosen.
- SET 20 mA Rate
The “SET 20mA RATE” programs the maximum flow rate at
which the output is 20 mA full scale, at 5 V or 10 V.
- Clear Total
This function resets the accumulated total back to zero in
the rate/total configuration. It does not affect the data in the
elapsed time/flow configuration.
Operation
The last press of the key returns the unit to operation mode.
In this mode, pressing either arrow key will toggle back and
forth between two displays, one for flow monitoring and the
other for usage monitoring.
Usage Alarm. Pressing the Start/Stop key will start the clock
and zero the total of the usage monitor. The clock will in-
crease and the total will accumulate (provided there is flow)
until the end of the monitoring period. At that time, the usage
total and clock will zero automatically and the cycle will start
over. If the usage total ever reaches its alarm point within
the monitoring time, the usage alarm relays will energize and
remain on until the Resume key is pressed. If the Resume key
is pressed during a monitoring cycle, it will freeze the cycle at
its current point. Pressing it again allows the cycle to resume
where it left off.
Flow Monitoring. The “Rate” indication gives the current rate
of flow. “Total” is a running total of flow which increases in-
definitely unless it is reset.
NC
COM
NO
NC
NO
COM
Main
power fuse
250mA
part # 26926
Neut
Hot
Gnd
110 Vac
Alarm 1
Alarm 2
Autodialer
Alarm
Page 6
FT522