E-Flo Plus Calibration
311596A
11
4.
Low Pressure Alarm
Enable/Disable
Low Pressure is an adjustable feature. Parameter Pr
20.08 is used to enable and disable the feature:
Low Pressure Alarm Enable => Pr 20.08 = 1
Low Pressure Alarm Disable => Pr 20.08 = 0
5.
Low Pressure Alarm Setting
The Low Pressure Alarm setting is controlled by param-
eter Pr 20.07. Default setting for the alarm is 150 psi.
Refer to Menu 20 parameter table to determine maxi-
mum setting for a given Lower size. Low Pressure Alarm
(#41) becomes active if it is enabled (Pr 20.08 = 1) and
system pressure is lower than the Low Pressure Setting
selected in Pr 20.07.
6.
System Ramp Rate Selection
Ramp rate controls the time it takes for the pump to
reach the set flow rate and is measured in gallons per
minute/minute (gpm/min). Note that a fast ramp rate
may cause the pump to instantaneously build high pres-
sure, causing system shutdown due to a High Pressure
Trip (Alarm #40).
The Ramp Rate setting is controlled by parameter Pr
20.02. Ramp rate range is 10 – 1000 gpm/min. Any
number within this range can be selected. It is recom-
mended that the default ramp rate be kept. The default
setting is 100gpm/min.
7.
Measuring Units
Select the desired units of flow measurement as follows:
Metric – liters per minute [lpm]=> Pr 20.15 = 1
English – gallons per minute [gpm]=> Pr 20.15 = 0
The Pr 20.15 selection affects only the flow measure-
ment displayed in Pr 20.17. It is not used by any sys-
tem’s functions.
8.
Speed Potentiometer
Enable/Disable
Speed potentiometer is a speed control option. Refer to
Motor Speed Control, page 20, for more information.
Set Pr 20.38 to enable or disable the speed potentiome-
ter.
•
Speed Potentiometer Enable=> Pr 20.38 = 1
•
Speed Potentiometer Disable=> Pr 20.38 = 0
9.
Saving Calibration
The last step in the calibration procedure is to save all
calibration values.
a.
Saving to the Drive/Program Module.
To ensure that all calibration values are per-
manently saved to the drive/program module:
1. Navigate to Pr 0.00 and set its value to
1000.
2. Press the red Stop/Reset button. The
number 1000 will automatically change to
0, indicating that all parameters have been
saved.
b.
Saving to the SMARTCARD.
SMARTCARD is an excellent memory
backup for system-specific parameter calibra-
tions. If system parameters are mistakenly
altered, using SMARTCARD can restore ini-
tial calibration.
1. Ensure that SMARTCARD is installed in
the VFD. (VFD is shipped with SMART-
CARD already installed and Graco
defaults saved to memory location #101).
2. Navigate to Pr 0.00 and set its value to
4202.
3. Press the red Stop/Reset button. Small
red dot on keypad display will start blink-
ing, indicating that parameters are being
saved.
4. When dot stops blinking, the save is com-
pleted.
This feature is disabled by default.