Pr
o
Minent
®
19
About this Sensor / Safety
1
About this Sensor
The CDE chlorine dioxide sensor is a diaphragm-covered amperometric dual
electrode measurement sensor. The chlorine dioxide sensor is used to
determine chlorine dioxide concentrations in surfactant-free water. Typical
applications for the type CDE 2 include the disinfection of drinking and
brewing water. The type CDE 3 is used in the chlorine dioxide treatment of
hot water of quality similar to drinking water up to 60
°
C (e.g. combat against
legionellae). The sensor delivers a standard 4 - 20 mA signal via a two-wire
interface that is largely unaffected by water flow. Power is also supplied to
the sensor via the two-wire interface.
2
Safety
Correct use of equipment
The sensor may only be used to determine and regulate chlorine dioxide
concentrations (ClO
2
)!
The sensor must not be used in water or solutions containing surfactants!
All other applications and modification of this equipment are prohibited!
The sensor is not electrically isolated!
CAUTION
•
The sensor may only be used in ProMinent in-line housing types
DLG III or DGM. Otherwise flow parameters cannot be maintained!
(see section 15 “Technical Data”)
•
There must be free discharge from the in-line flow housing outlet.
•
The supply voltage to the measuring device and the sensor must not
be interrupted. After long intervals without power (more than 2 h) the
sensor should be given a further run-in period and recalibrated (see
section 7.1 “Run-in Period” and section 7.2 “Calibration”).
IMPORTANT
•
The sensor may only be assembled, installed, serviced and operated
by appropriately trained and authorised personnel!
•
Check the sensor regularly for dirt and deposits, check the
diaphragm cap for air bubbles!
•
Observe valid national directives for the maintenance, servicing and
calibration intervals!
BA_DT_095_08_08_4spr.p65
05.08.2008, 12:42 Uhr
19