Chemtrol PC3000 - Influent Pressure; Pressure Alarms; Calibration; Effluent Pressure

MANUALPC-2010 CHAPTER IV - OPERATION Page 41
6.2 - Influent Pressure
Line number 2 in the Pump Menu screen displays the current
reading of the Influent Pressure sensor, i.e. before the first
filter.
It is one of the parameters that can be used to initiate the filter
backwashing operation when it exceeds a specified value that
is indicative of a dirty filter condition (see Menu 7 - Filter
Menu).
Pressure Alarms
S
ubmenu 6.2 is used to specify the alarm limits for the influent
pressure in case of malfunction of the pump, filter or valves.
There is no equivalent submenu for the effluent pressure. To
change the limits, (1) select the + or - sign using the right
arrow, (2) press "OK", (3) enter the limit value, (4) press "OK".
Submenu 6.2.1 sets the options for the low alarm while
submenu 6.2.2 sets the options for the high alarm. If set on
YES, the Feed Limit alarm shuts off the main pump and the
buzzer alerts the operator.
Upon exit from this submenu, the calibration submenu is
displayed.
Calibration
The pressure sensor is calibrated in the Submenu 6.2.1.1 by
entering two factors representing (1) the output of pressure per
volt, and (2) the output in volts corresponding to zero pressure,
as specified by the manufacturer of the sensor.
The factory set default factors of 12.0 and 1.75 are valid for
CHEMTROL® pressure transducer Series 1200 in the
pressure range of -15 to 45 psi. It should normally not require
any adjustment.
6.3 - Effluent Pressure
L
ine number 3 in the Pump Menu screen shows the value of
the Effluent Pressure, i.e. after the filter(s).
The effluent pressure sensor is calibrated in the same way as
the Influent Pressure sensor.
Differential Pressure
The controller automatically calculates the value of the
Differential Pressure, i.e. Influent Pressure minus Effluent
Pressure.
This is one of the parameters that can be used to initiate the
filter backwashing operation when it exceeds a specified value
that is indicative of a dirty filter condition (see Menu 7 - Filter
Menu).
Menu 6.2
Menu 6.2.1 and 6.2.2
Submenu 6.2.1.1
Submenu 6.2.1.2
PRESSURE ALARMS
Alarm low psi + 10
Alarm high psi + 50
ALARM OPTIONS
Feed Limit NO
Buzzer NO
INFLUENT PRESSURE
Pressure
factor: 12.0
INFLUENT PRESSURE
Voltage for zero
pressure: 1.75