Phase Technologies Essential Series - Page 30

25 | P a g e
DISPLAY
MESSAGE
DESCRIPTION
DEFAULT/MIN
/MAX VALUE
PRECHARGE
TIME
In minutes. Sets the maximum time for pre-charge
regardless of any sensor inputs. A setting of zero
disables the pre-charge mode.
0/0/30000
The following parameters are only accessible when using Digital Constant Pressure.
See Section 7.3, on page 36, for additional information.
BOOST
FREQUENCY
Frequency (Hz) the system will change to when it is
boosting pressure.
5/0/30
BOOST TIME
Period of time (seconds) the system will boost until
shutting off.
2/0/120
RESPONSE
TIME
This determines how quickly the drive will respond to
pressure fluctuations due to site-specific pipe and
tank configurations. Select QUICK for large systems,
AVERAGE for medium systems, and SLOW for
small systems.
AVERAGE/
SLOW/
QUICK
The following parameters are only accessible when using Analog Constant Pressure.
See Section 7, on page 33, for additional information.
BOOST
AMOUNT
As psi. The parameter value specifies a pressure
increase in psi before sleep mode. The value is
added to psi SETPOINT.
5/0/100
BROKEN PIPE
PSI
Psi at which unit will determine there is a broken
pipe. Value of zero disables this feature.
0/0/150
BROKEN PIPE
TIME
In minutes. Time at which measured pressure is
below BROKEN PIPE PSI before unit faults.
0/0/9999
PRECHARGE psi
Used only for analog CP systems. Pre-charge will be
terminated when pressure reaches this set point.
Should be set less than PSI SETPOINT.
20/0/200
PROPORTIONAL
GAIN
Multiplier for the analog error signal in an analog
constant pressure system. When parameter is set to
a value of zero the keypad displays SIMPLE MODE
and the controller switches to an algorithm which
does not require a gain setting. See Section 7.9,
Troubleshooting Constant Pressure Systems, for
details. When using PI control, best results will be
obtained by starting with a value of 5 for
PROPORTIONAL GAIN.
5/simple
mode/60
INTEGRAL GAIN
Multiplier for the integral term in PI control of analog
constant pressure. Used to fine tune control of
unstable systems. Parameter is disabled when
PROPORTIONAL GAIN is set to SIMPLE MODE.
See Section 7.9, for details.
12/0/100
DERIVATIVE
GAIN
Used to reduce overshoot and oscillation. Should be
used only when necessary because it tends to
amplify noise in the transducer signal. It may cause
the system to become unstable.
0/0/50
PID FILTER
GAIN
Controls the rate of frequency increase in response
to the error term.
0/0/100
PID FILTER TIME
Sample interval for the PID Filter Gain.
1/0/10