How do you program a sc200 to provide a flow based pulse?

Document ID

Document ID TE8180

Version

Version 2.0

Status

Status Published

Published Date

Published Date 10/26/2018
Question
How do you program a sc200 to provide a flow based pulse?
Summary
Programming flow pulse volume on the sc200 controller.
Answer
Flow Pulse Volume (for Paddle Wheel and Ultra Sonic Flow Sensors)
Using a relay output in conjunction with Flow Pulsed Volume alarm, the sc200 may be used to pace an external device such as a Sigma sampler or communicate to a SCADA system.  
PULSED VOLUME:  user configurable value that once achieved will send a relay pulse output.  It starts with 0 and accumulates up to the user-configurable PULSE VOLUME setting, sends a pulse, then goes back to 0.
Wire the sampler auxiliary cable to the relay strip on the sc200 controller.  Warning: disconnect power prior to opening the controller.
The sc200 has four relays, A, B, C, and D.  The relay icon will also appear in the upper right corner of the main screen.  Choose a relay to connect the auxiliary cable from the sampler to the sc200 controller.  For wiring in to the relay strip, follow the following guidelines:
SD900 Sampler Controller, using the bare lead auxiliary cable, Pin A (White wire) is power output and should be wired to the NO (normally open) terminal.  Pin C (Orange wire) is pulse current input and should be wired to the NC (normally common) terminal.
900MAX Controller Sampler Controller, using the bare lead auxiliary cable, Pin A (White wire) is power output and should be wired to the NO (normally open) terminal.  Pin C (Yellow wire) is pulse current input and should be wired to the NC (normally common) terminal. 
For other devices, contact the manufacturer for wiring details.
(NOTE:  The sampler will also need to be programmed for flow pacing mode)
Close the controller and reapply power.
The Pulse Volume needs to be defined in both the sc200 controller and flow sensor set up.

SC200 RELAY SET UP:
MENU>sc200 SETUP>RELAY SET UP
                Select the appropriate relay to which the external device is connected (A, B, C or D)
ENTER>ACTIVATION>SET LOW ALARM: sets the value where the relay will turn on in response to decreasing measured value. When flow pacing, this should be set to 0.
HIGH ALARM: sets the value where the relay will turn on in response to increasing measured value. When flow pacing, this should equal the flow pulse volume.
LOW DEADBAND: sets the range where the relay remains on after the measured value increases above the low alarm value.  For flow pacing, this value should be 0.
HIGH DEADBAND:  Sets the range where the relay remains on after the measured value decreases below the high alarm value.  For example, if our high alarm is 1000 gallons and the high deadband is set for 10, the relay remains on between 990 and 1000.  Factory default is 5% of the range. 
SELECT SOURCE:  be sure US (Ultra Sonic) is selected
SET PARAMETER:  scroll down to PULSED VOLUME
SET FUNCTION: select ALARM

US SENSOR SET UP:
From the SETTINGS menu, select SENSOR SET UP>CONFIGURE>SET VOL/PULSE
Use the arrow keys to set the value on which a pulse should be sent to the external device.  (NOTE: the unit of measure for the pulsed volume output will match the general volume unit of measure, for example, US Gallons or Millions US Gallons.)
PULSE WIDTH:  user configurable value that defines the time period the relay is closed.  (minimum value is 1 second). 
As the volume counts up to the customer defined PULSED VOLUME, the relay will open and close, sending a signal to the external device.  The relay icon in the upper right on the screen will indicate activity.  When solid, the relay is closed, when blank, the relay is open.

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