REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUAL
s.r.l.Milano - ITALY
Page 16 of 25
ro4e_mi-r10.doc -
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5.3.5. Conductivity
Water conductivity is rough related to its salinity. Since conductivity value is easily
measurable, it is normally used to gives an indication, even if approximate, of the efficiency of
the system.
The conductivity-meter COND, on the front of the control panel, continuously meters and
visualizes the conductivity of treated water (permeate).
When the conductivity of treated water is higher than the set-point value (factory set 40
µS/cm), the alarm "high conductivity" is driven.
The alarm of high conductivity water has not any influence on the working of the system.
The conductivity-meter is provided with 2 adjustable set-points, K1 and K2; K1 is used for the
alarm, while the set point K2 is not used.
The main functions of the conductivity-meter are the following :
•
The pushing of the button ON disables the outputs related to set-points K1 and K2; in
the same time, the light ON blinks to warn that the set-points have been manually
disabled
•
The light ON is continuously lit up to indicate the correct working
•
The blinking of the light ON warns of a current faulty condition.
•
The pushing of the button NEXT, during the normal working, alternates the
visualization of the conductivity and the one of the temperature of water (only if the
temperature sensor is installed, otherwise a fixed value is shown).
In order to visualize and/or modify the parameter of configurations of the instrument,
(included the set-point K1 value, parameters P07-P08), it is necessary to enter the
programming mode, according to the following directions :
•
push and keep pushed for at least 2 seconds the button CAL; the notice CAL
appears.
•
push the button NEXT, the notice EDIT appears on the top and left side of the screen,
while the notice P01 appears in the center.
•
by pushing the b or -, select the desired parameters (P01, P02, or else)
•
when the desired parameter is visualized on the screen, push the button CAL; the
current value of the selected parameter appears and it is possible to modify it by
pushing the b or -.
•
push the button CAL to confirm the modifications
•
proceed the same way for other parameters to modify, if any or push the button NEXT
to conclude the programming session.
•
If not any button is pushed for several seconds, the programming mode is
automatically closed.
For further details about the functions of the instrument, see the directions of the
attached manual of the instrument manufacturer.
5.3.6. Minimum pressure
A pressure switch
PC
is installed upstream of the high pressure pump
P.
It acts when the pressure of the water in that point is less than 0.8 bar (80 kPa). It can be
also caused by non-opening of the solenoid valve
EI
. It drives the “LOW-PRESSURE ALARM”,
few seconds delayed, and stops the working of the high pressure pump P; the inlet solenoid
valve
EI
, instead, remains open.
The alarm and the block can be re-set only by turning, even momentarily, the mode
selector on " RESET".
