User Manual

25
Friction Loss
Friction loss is the gure that is added to the Set Point to compensate for Friction in a
pipeline. The setting increases the Set Point Pressure based on the calculated ow
rate. The increase in Set Point is proportional to the calculated ow rate. The input
gure is the total additional pressure required when all of the nominated pumps are operating.
Set Point 2 - 8
The Speedman has the option to set 8 Set Points that can be triggered by a Digital
Input or via a time of day event. This allows a variation to the main Set Point to be
made remotely.
It changes the main Set Point to the value nominated in alternate Set Points 2 through 8. To select this option,
an input is programmed to function as Set Point 2 to 8 and is activated by closing the contact between the
nominated input and the Input Common OR by using the timed Set Point feature.
Screens Set Point 2 – 8 are hidden unless an input is nominated as the corresponding set point within the
INPUTS menu or a timed set point option is set.
Pressure Trip 1 Low
The Speedman has the ability to energise an output relay based on a nominated
system pressure. This can be useful to signal other elements of a system not
under control of the Speedman. See Output Relays for information on how to set
this feature.
Pressure Trip 1 - the designated relay will energize on reaching Pressure Trip 1 entered value (either Pressure
Trip Low and/or Pressure Trip 1 High).
Set Point 2
XXXX
Press Trip 1 Low
XXXX
Friction Loss
XXX
Linear Friction Loss
NB. Make sure that the friction loss gure is less than the difference between the highest Set Point &
High Pressure Limit.
Exponential Friction Loss