EMERITUS® machines provide water quality monitoring. This function monitors the pH and conductivity of the water
supply of spray resources and adiabatic panels. For both quantities, two safety levels, one warning level and one
blocking level are managed:
•
When the first threshold level is exceeded, a warning alarm is generated
•
When the second threshold level is exceeded, a real alarm is generated and the system is locked (closing of
solenoid valve and modulating valve).
•
There are two "high" and two "low" thresholds for pH verification.
•
For conductivity verification, only the "high" thresholds are foreseen.
There is a return differential (threshold - differential) under which the anomaly conditions fall; the alarm that causes
the system block is still manually reset.
Parameter PR60 is enabled (1) or disabled (0) by factory default depending on the presence or not of water quality
control on the machine.
Attention: modification of the pH and conductivity control thresholds must be agreed in advance with LU-VE.
Otherwise, you will be responsible for any malfunctions and damage resulting from the new settings.
PARAMETER
NAME
READ ONLY
PR60
Enable water quality control
PR61
pH control return differential
Water pH control warning
PR62
threshold (high)
Water pH control block alarm
PR63
threshold (high)
Water pH control warning
PR64
threshold (low)
Water pH control block alarm
PR65
threshold (low)
Conductivity control return
PR67
differential
Water
PR68
conductivity control warning
threshold
Water conductivity control block
PR69
alarm threshold
MODBUS Registers
MODBUS
MODBUS
Name and Description
Register
Register
Parameter
Base 0
Base 1
PR60
Enable water quality
0x079C
1949
control
PR61
0x079D
1950
pH return differential
LU1W - User Manual
11 WATER QUALITY CONTROL
DESCRIPTION
Data Type and Notes
0 = disabled,
1 = enabled
- unsigned short int
- unsigned short int
DEFAULT
MIN
VALUE
VALUE
No
No
0.5
0.0
8.0
PH14
8.5
PH14
6.5
PH14
6.0
PH14
100
0
800
PH16
1500
PH16
Default
value
0
0.5
93
MAX
UM
VALUE
-
Yes
-
5.0
PH15
-
-
PH15
-
PH15
PH15
-
mS/cm
1000
mS/cm
PH17
mS/cm
PH17
Decimal
Min
Max
positions
0
1
0.0
5.0
REV.1.1 – 07/11/2017 - ENG
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REGULATION
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MODBUS
Register
Type
0
input
0.0
holding