Pr
o
Minent
®
Page 130
8.11.2.2
DULCOTEST
®
CDE Sensor and DULCOTEST
®
Sensor PHEP or PHER for
pH, Electrical Installation
Installation
DULCOTEST
®
CDE Chlorine Dioxide Sensor
IMPORTANT
• The sensor is not electrically isolated from the sample water. All other elements must
be isolated! The controller must be isolated both from the sensor and from the supply
voltage!
• The supply voltage must not fall below 16 V DC, even for a short period! The current
source must able to sustain 35 mA at a min. 16 V DC! Insuffi cient supply voltage will
result in an inaccurate reading!
• After the electrical connection of the sensor, the sensor has to be inserted into the
sample water which has to contain chlorine dioxide.
The sensor incorporates a passive 4-20 mA two-wire interface, i.e. the power supply is provided
externally e.g. via the controller.
• Safety requirements are automatically met if the sensor is connected to a ProMinent
®
control-
ler (e.g. DULCOMETER
®
D1C).
• Do not switch off the measuring system when in intermittent use!
If necessary, dosing equipment should be timer-controlled!
Electrical
Installation
Rotate the sensor adapter anticlockwise by 90 º and remove (bayonet fi tting).
Unscrew the PG-7 threaded connector tensioning screw and insert the signal cable leading
from the controller.
Strip the ends of the cable and attach to the two-wire connector: 1 = positive, 2 = negative
Insert approx. 5 cm of signal cable into the sensor and tighten the PG-7 threaded connector
tensioning screw.
Insert the sensor adapter completely into the housing and screw together carefully to prevent
damage to the ends of the bayonet connector.
Electrical
connection
to
sensor
1 2
5 cm
pH
Sensor
Connect the DULCOTEST
®
PHEP or PHER sensor for pH with the marked cable of the respective
controller DULCOMETER
®
D2C.
pH/Chlorine Dioxide
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24.02.2009 11:56:11 Uhr
24.02.2009 11:56:11 Uhr