Pr
o
Minent
®
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Electrical connection
to sensor
1 2
5 cm
Commissioning
CAUTION
• Please note that for regulation tasks, the response time T
90
is 8 min.!
• The power supply for the measuring equipment and the sensor must not be interrupted.
If power is inter rupted for a long period (>24 hrs), commissioning should be re-started
(run-in and calibrate the sensor).
• Do not switch off the measuring system during intermittent operation!
Connect the metering device after any time-delay. However, if there is a long period
(weeks) during which no disinfectant is metered, disconnect the sensor from the power
supply and store in a dry place.
• The current signal should not exceed 20 mA!
Otherwise the current signal can drop, the sensor can become damaged and this can
cause dangerous over metering in a control system! In order to avoid this, install a moni-
toring system, which turns off the remaining H
2
O
2
control and triggers an alarm. The
monitoring system should not be automatically reset.
• Avoid installations that can cause air bubbles in the sample water! Air bubbles clinging
to the sensor diaphragm can cause the measured value to be too small and thus lead to
dangerous over metering in a control system!
• After commissioning, the sensor should always be stored in a moist environment.
After successful installation, the measuring equip ment can be acti vated. After that you need to
wait for the designated running-in time for the sensor.
8.3.2.3
DULCOTEST
®
PER Sensor for Hydrogen Peroxide, Running-In
Running-In
Period
In order to obtain a stable reading, the sensor requires the following running-in times:
Initial commissioning:
approx. 2 - 6 hours
after changing the diaphragm: approx. 2 - 6 hour
Re-commissioning:
approx. 1 - 3 hours
If air between the gauze and the diaphragm was not expelled then, naturally, running-in times will
be longer!
8.3.2.4
DULCOTEST
®
PER Sensor for Hydrogen Peroxide, Calibration
CAUTION
• You must perform a slope test after changing a diaphragm cap or electrolyte.
• You should perform a slope test at regular intervals to ensure fl awless operation of the
sensor.
• You should observe the relevant national regulations in force for calibration intervals!
H
2
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2
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24.02.2009 11:56:06 Uhr
24.02.2009 11:56:06 Uhr
