Pr
o
Minent
®
24
Installation / Operation
Electrical installation
왘
Rotate the sensor adapter anticlockwise by 90 ºC and remove (bayonet
fitting).
왘
Unscrew the PG-7 threaded connector tensioning screw and insert the
signal cable leading from the controller.
왘
Strip the ends of the cable and attach to the two-wire connector:
1 = positive, 2 = negative.
왘
Insert approx. 5 cm of signal cable into the sensor and tighten the PG-7
threaded connector tensioning screw.
왘
Insert the sensor adapter completely into the housing and screw together
carefully to prevent damage to the ends of the bayonet connector.
7
Operation
IMPORTANT
•
The sensor must be used only in surfactant-free water or solutions!
•
When operating the sensor, the sample water must permanently
contain chlorine dioxide.
•
Do not switch off the measuring system during interval operation!
After operation without chlorine dioxide, running-in periods are to be
reckoned with.
If required, switch on metering unit time-delayed!
If no chlorine dioxide is metered for a longer period of time, the
sensor must be disconnected from the power supply and stored dry.
7.1
Run-in Period
The sensor requires a run-in period before it will display stable readings.
Commissioning:
2 - 6 h
Re-commissioning:
1 - 3 h
Diaphragm-/electrolyte replacement:
approx. 0.5 h
7.2
Calibration
The sensor can be calibrated after the run-in period.
IMPORTANT
•
A slope test must be carried out after replacing the diaphragm cap or
electrolyte!
•
Slope tests must be carried out at regular intervals to ensure correct
functioning of the sensor! For testing drinking water, calibration of
the sensor every 3 - 4 weeks is sufficient.
•
Avoid incorrect dosing due to air bubbles in the water. Air bubbles
clinging to the sensor diaphragm can reduce the measured variable
and thereby lead to overdosing.
•
Observe applicable national directives for calibration intervals!
BA_DT_095_08_08_4spr.p65
05.08.2008, 12:42 Uhr
24