Davey Speedman Dual Pump Variable Speed Pump Control System - Manual (Page 35)

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Friction Loss Calculator
There are two methods of calculating the pressure loss.
• Linear progression.
• Exponential extrapolation.
Friction loss is the figure that is added to the Set Point to compensate for Friction in a pipeline. The result of
this setting is to increase the Set Point Pressure based on the flow rate calculated.
The input figure is the total additional pressure required when all of the nominated pumps are operating.
Exponential extrapolation
Select this option to vary the set point based on the basis of the flow to the power of 1.52.
Set Point = %Flow 1.52
User Access Code
The access code is used to limit access to the settings menus.
The user access code has the range “off, 0 – 250”.
Off will disable the access code and allow unlimited access.
Once a number is selected then access to the settings screens or any other editable screen will require the
inputting of this number before progressing further.
To edit press enter and then up or down keys to edit the new number.
Press enter again and exit the menu to store the changes.
WARNING. If the Access Code is changed from the default of 21 and then forgotten it may restrict access to
other authorised users. Ensure that the new Access Code is recorded in the Site Record section of this manual
AND if necessary another safe place.
Serial Comms
Serial Comms selects how the onboard RS-485 serial port is used.
•
Output Cont Data options is a data logging option that allows the pump station
to be remotely or locally logged.
• Modbus Protocol allows modbus compatible interfaces to monitor and adjust values during operation.
** Please make inquiries to Davey to obtain the relevant manuals and datasheets for the Speedman’s modbus
interface.
Modbus Address
The Modbus Address setting allows changes to the Speedman’s address
when installed on network of modbus devices. This allows more than one
device to be used on a network to avoid conflicts with other modbus devices.
Access Code
XXX
Friction Loss
Linear
Serial
CommsModbus
Modbus Address
XX
Linear Friction Loss Exponential Friction Loss