Super Systems eFLO - Manual (Page 19)

eFlo Electronic Flow Meter Operations Manual
Super Systems Inc. Page 19 of 25
• Gain. The current gain. This value controls the speed of valve response for automatic
control. The higher the value, the more quickly the valve will open and close. The lower
the value, the more slowly it opens and closes. Edit Gain allows you to change the value.
• Deadband. The value defining the area above and below the setpoint where no control
action will occur. If the deadband is too small, the control may oscillate around setpoint.
If the deadband is too high, the flow will not reach setpoint. The range for this value is 1
to the full scale flow value.) Edit Deadband allows you to change the deadband value.
• Pressure Transducer mA Zero. The adjusted mA input from the pressure transducer.
This value allows the user to adjust the pressure transducer, which transmits a 4-20mA
signal to indicate flow. When no flow is present, the ideal value for the Zero value is
4.00mA (although the value will not always be exactly 4.00). Edit PT mA Zero allows you
to adjust the zero value. NOTE: This achieves the same result as using the eFlo keypad
to change the zero value—a procedure described in more detail in the Zero Calibration
section on page 15.
• Pressure Transducer mA Span. The highest value of the mA range sent by the pressure
transducer. For instance, if 20mA is the highest value that the transducer will send, the
mA span value is 20. Edit PT mA Span allows you to change this value.
• Analog Input Setpoint Zero. The lowest flow rate value for a remote setpoint of 0. This
value will correspond to approximately 4mA. Edit AI SP Zero allows you to change this
value.
• Analog Input Setpoint Span. The highest flow rate value for the remote setpoint flow.
This value will correspond to approximately 20mA. Edit AI SP Span allows you to change
this value. Edit SP Zero allows you to change this value.
• Analog Output Zero. The lowest flow rate that will be transmitted by an analog output
signal from the eFlo meter. This value will correspond to approximately 4mA. If the flow
range is 0 to 100, the Analog Output Zero value will be 0. Edit AO Zero allows you to
change this value.
• Analog Output Span. The highest flow rate that will be transmitted by an analog output
signal from the eFlo meter. This value will correspond to approximately 20mA. If the
flow range is 0 to 100, the Analog Output Span value will be 100. Edit AO Span allows you
to change this value.
• Low Flow Setpoint. The value that will trigger a Low Flow Rate Alarm. The alarm will be
active as long as the flow rate is less than or equal to this value. Edit Low Flow Setpoint
allows you to change this value.
• High Flow Setpoint. The value that will trigger a High Flow Rate Alarm. The alarm will be
active as long as the flow rate is greater than or equal to this value. Edit High Flow
Setpoint allows you to change this value.
Curves Menu
The Curves menu (Figure 6) allows you to adjust Calibration Curve points, save curves to the
local computer, download the active curve from the meter, and upload a curve to the meter.