Astralpool PC95, Instruction Manual

Page: 49 / 86

20
This is the simplest and most elementary type of control that can be implemented. The metering
device is switched on as soon as the SET POINT measurement is exceeded, and switched off
again as soon as the measurement returns to less than a given value to be set, that is defined as
HYSTERESIS.
The HYSTERESIS value makes it possible to avoid constant switching on and off of the metering
device. Limited hysteresis improves control, but to the detriment of the metering device, which
would be subject to greater wear (graphs on page 19).
7.2___PULS
Enter the programming menu ( See Page 16 ) and go to the PRG2 function.
VARIABLES DEFAULT VALUES COMMENTS
PH SETTINGS
SET 7,20 pH SET POINT pH
ALL 6,50 pH PH minimum alarm
ALH 7,90 pH PH maximum alarm
REL ACID Type of control
PRS NO Status of the pH relay
DEL 0 Seconds Delay time, pH metering
SPM 20 Seconds Strokes/minute, Output
Freq.
BP 0,50 Seconds Proportional band
REG PULS Control mode
OUT MIS Working mode Output mA
HIS(*) 0,00 pH Hysteresis
Ton 0 Seconds ON time (Reg. Puls.)
Tof 0 Seconds OFF time (Reg. Puls.)
BND 0,00 pH Safety band
RMA 4-20 mA MA output dynamics
PHS 0 pH Initial value for mA control
PHE 14,00 pH End value for per mA
control
CHLORINE SETTINGS
SET 0,60 ppm SET POINT Chlorine
ALL 0,30 ppm Chlorine minimum alarm
ALH 1,50 ppm Chlorine maximum alarm
REL LO Type of control
PRS NO Status of chlorine relay
DEL 0 Seconds Chlorine-metering delay
time
SPM 20 Seconds Strokes/minute, Output
Freq.
BP 0,50 ppm Proportional band
REG PULS Control mode
OUT MIS Working mode Output mA
HIS 0,00 ppm Hysteresis
Ton 0 Seconds ON time (Reg. Puls.)
Tof 0 Seconds OFF time (Reg. Puls.)
BND 0,00 ppm Safety band
RMA 4-20 mA MA output dynamics
CLS 0 ppm Initial value for mA control
CLE 5,00 ppm End value for per mA control
CTP 0 %/°C Coefficient for offsetting the
measured value in relation to the
temperature expressed in %/°C.
CPH OFF Enables correction of the chlorine
measurement in relation to the pH
ENABLING
EN SC
Enables the Cal and Set keys
ID 1
Indicates the ID of the multi-point
serial network
BR 2400
Baud rate of RS485 serial link