Pr
o
Minent
®
Page 29
Free Chlorine
Electrical
Installation
Rotate the sensor adapter a quarter-turn anticlockwise and pull off (bayonet fi tting).
Unscrew the locking screw of the PG 7 threaded connector and feed through the signal cable
from the controller.
Strip the cable ends and connect to the 2-wire connector: 1 = plus, 2 = minus.
Insert approx. 5 mm of the signal cable into the sensor and tighten the PG7 threaded connec-
tor locking screw.
Push the sensor adapter right into the housing and rotate carefully clockwise until the stop.
Take care not to break the tips of the bayonet fi tting.
Electrical
connection
to sensor
1 2
5 cm
8.1.2.3
DULCOTEST
®
CLE Chlorine Sensor for Free Chlorine, Running-In
IMPORTANT
• The sensor must not be operated in water or solutions containing surfactants.
• Do not switch off the measuring system during interval operation! After any operation
without chlorine, running-in periods are to be reckoned with. If required, switch on
metering unit time-delayed! If no chlorine is metered for a longer period of time, the
sensor must be disconnected from the mains and stored in a dry condition.
Running-In
Period
To acquire a stable display value the sensor should be run in for a predetermined period.
When
fi rst commissioned:
1 - 3 h
When re-commissioned:
0.5 - 2 h
When membrane/electrolyte replaced: approx. 0.5 h
8.1.2.4
DULCOTEST
®
CLE Chlorine Sensor for Free Chlorine, Calibration
IMPORTANT
• A slope test must be carried out after replacing the membrane cap or electrolyte.
• Slope tests must be repeated at regular intervals to ensure that the sensor is working
correctly! When used in the treatment of swimming pool or drinking water it is generally
suffi cient to re-calibrate the sensor every 3-4 weeks.
• Avoid incorrect dosing due to air bubbles in the sample water! Air bubbles clinging to
the sensor membrane can result in a measured variable that is too low and thus lead to
incorrect dosage.
• Observe applicable national directives for calibration intervals!
Preconditions
• Constant fl ow through in-line probe housing
• Constant sample water temperature
• Similar sample water and sensor temperatures (wait approx. 15 min.)
• The sensor has been run in
• Constant pH value
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24.02.2009 11:56:04 Uhr
24.02.2009 11:56:04 Uhr