1
ROC-2313 Reverse Osmosis Controller
1 General
The instrument is a combined control instrument of a reverse osmosis controller and an on-line
conductivity instrument. It can perform the operation test, status control and on-line monitoring of water
quality conductivity (combining PLC controller and conductivity meter). It takes multiple anti-interference
measures, adopts unique process flow and graphical control panel with LED indicator lamp embedded, the
interface is friendly; menu-driven operation is used, multiple groups of parameters can be set and modified,
the requirements of automatic operation are met.
2 Process Flow Selections
There are two typical operation modes for RO system (as shown in Fig.1A and B). This instrument
can operate in both modes in A and B.
3 Functions and Main Technical Specifications
Low feed protection:
In case of raw water supply break-off, the
“
LOW FEED PRESS
”
lamp will be lightened, the
nixie tube will display
“
ALA
”
and the buzzer will give an alarm, the controller will shut down the
whole RO system. After that, the controller will keep detecting the low feed switch. When the water
supply is resumed, the system will be restarted.
Low pressure protection:
In case of low pressure, the
“
LOW PRESS
”
lamp will be lightened, the nixie tube will display
“
ALA
”
and the buzzer will give an alarm, the controller will shut down the whole RO system and try
to start up for the first time after 1 minute. If the water pressure is normal, the water producing
process will be resumed. If the start-up fails for three times, the system will come into a dead-lock
status. Press the ECS key(external control switch) or the reset key to exit and then restart.
High pressure protection:
In case of high pressure over limit, the
“
HIGH PRESS
”
lamp will be lightened, the nixie tube
will display
“
ALA
”
and the buzzer will give an alarm, the controller will shut down the whole RO
Flush vale
Flush valve
Level of raw
water
Raw
water
tank
Waste outlet
Low
press
pump
P
re
-p
ro
ce
ss
in
g
1
P
re
-p
ro
ce
ss
in
g
2
P
re
-p
ro
ce
ss
in
g
3
Direct drain valve
Safety
filtering
Low press protection
Inlet valve
High
press
pump
High press protection
RO
membrane
Pure
water
tank
Fig. 1-A First level RO process flow with raw water tank
Fig. 1-B First level RO process flow with direct water supply
Safety
filtering
Low press protection
High press protection
High
press
pump
RO
membrane
Flush valve
Pure
water
tank
Inlet valve
Tap water
Low
press
pump
Waste outlet
Low feed
protection
P
re
-p
ro
ce
ss
in
g
1
P
re
-p
ro
ce
ss
in
g
2
P
re
-p
ro
ce
ss
in
g
3
Direct drain valve
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