Chapter 4 – General Configuration
Firmware Version 3/4.31.37
This parameter is to be used in conjunction with Valve Dwell Time. Set this parameter
to be four times the deadband rate. Large, course valve adjustments will be made
when the flow rate is far from the deadband. As the deadband is approached, the
valve will begin making the fine adjustments prescribed by Valve Dwell Time. The
Deadband Rate setting can be found under Configuration/Equipment Setup/Meter.
See Valve Dwell Step Time.
Set this value to 1.00 when using the Valve Dwell Time and Valve Dwell Step Rate
parameters.
When enabled, the Control Valve algorithm will attempt to adapt to the speed of the
valve resulting obtaining more accurate target flow rates.
To use this feature:
Flow Scan Time must be set to 0.200 seconds.
Valve Dwell Time set to 0.030 seconds.
Use this parameter to set the type of flow control valve that will be used.
DIGITAL: Control valve that contains a upstream (normally open) solenoid, and a
downstream (normally closed) solenoid.
ANALOG: 4-20mA Analog Control Valve. 4mA is considered full closed, and 20mA is
considered full open.
NONE: No flow control valve used.
The mA amount to INCREASE the analog output after each flow scan if the flow rate
is found to be BELOW then the target dead-band flow rate.
The mA amount to DECREASE the analog output after each flow scan if the flow rate
is found to be ABOVE then the target dead-band flow rate.
Set this parameter to delay the excess flow alarm, so the alarm will not pop up
immediate. This is to hide short peaks in flow, which some meters can handle.
This parameter will set the loop current when the analog valve control is in IDLE. This
will work only on FCM2 Version 42 and higher.
Enter the flow rate that is represented by a 4mA signal from the analog meter
transmitter. This value is usually 0. Check the analog meter documentation or
configuration for this value.
Enter the flow rate that is represented by a 20mA signal from the analog meter
transmitter. This value is usually the maximum flow rate the meter can measure.
Check the analog meter documentation or configuration for this value.
Enter any needed flow rate offset. Any needed flow rate calibration adjustments
should be made in the meter transmitter. Use this parameter to make adjustments if
the flow rate on the meter is different than displayed on the MultiLoad.
Enter the Cut-Off flow rate. Any flow rate measured on the 4-20mA signal that is
below this value will be processed as a zero flow rate.
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