OS3030
Functional description
"Stop during rinse" phase, "standby stop" phase, maintenance" phase
Conductivity measurement
3
Stop during rinse
phase
The STOP DURING RINSE phase is activated
by the stop input.
It serves to switch off the osmosis system dur-
ing the regeneration of an upstream softening
system, for instance.
The activation of this can be programmed
separately for each of the following phases:
rinse after production, rinse during production
and rinse during standby.
The following values are monitored during the
RINSE DURING STANDBY phase provided
the controller is properly programmed, the IF
plug-in card (available as an optional extra) is
plugged in or the requisite sensors are con-
nected to the inputs:
Stop input (
programmable
)
Excess pressure input
External alarm switch input (
programmable
)
Low-water input (
programmable
)
Motor circuit-breaker input (
internal
)
Standby stop
phase
The high-pressure pump, the valve outputs
and the relay outputs are not activated during
this phase.. It is shown automatically during
initial start-up and when new versions of the
software are installed so that the basic values
can be programmed first of all. However, it can
also be called up manually.
This function can also be called up in conjunc-
tion with the power failure signal.
Application: for technical reasons, the plant will
not restart automatically after a power failure.
All of the inputs are deactivated during the
STANDBY STOP phase.
Maintenance phase
The plant can be switched on and off during
the MAINTENANCE phase, in order to clean
the osmosis modules with special solutions, for
example. Two maintenance stages can be
programmed. The max. switch on time per
stage is 9999 minutes.
If the system requires maintenance, this can
be displayed automatically (the maintenance
interval can be set to 1-65,000 hours).
Conductivity measurement
The controller is equipped with a conductivity
meter, enabling the conductivity of the perme-
ate to be measured and monitored.
The conductivity meter has been designed to
support two measuring ranges and has an
automatic measuring range switch function.
The measuring ranges depend on the measur-
ing cell used and range from high-purity water
below 1 µS/cm to highly saline waters of up to
100 mS/cm.
In order to check that the conductivity meas-
urement is working properly a threshold can be
set for each range; a ceiling can also be set for
checking the quality of the permeate. If the
reading drops below the threshold, the system
is switched off after a fixed delay of 60 sec-
onds. The user can program whether or not the
system should cut out if the ceiling is over-
stepped, together with a delay.
If readings are below the threshold or above
the ceiling, an alarm relay can be signalled
externally with the aid of the acoustic signal
sensor, if there is an IF plug-in card installed.
Calculating the measuring ranges:
Range
max
= cell constant * 10 000 µS
Range
min
= cell constant * 10 µS
