ProMinent DULCOTEST CTE 1-mA Mode D'emploi page 39

Requirements The sensor reading is stable (no drifts or unsteady values for at least
5 minutes). This is normally fulfilled, when
• The system has been allowed to run-in for the specified period (see Run-in
• The flow through the in-line probe housing is constant and corresponds
• The sample medium and the sensor are at the same temperature.
• The pH value is constant and within the admissible range (pH 6.5 - 9.5).
Zero point
calibration Zero point calibration is necessary only when the sensor is used at the lower
limit of the measuring range.
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ProMinent
• Avoid air-bubbles in the sample flow. They can attach at
the membrane, which may cause too low measured values.
Within a control system this may lead to dangerous over-
dosing of bromine.
• For proper function of the sensor, the slope test has to be
repeated regularly.
• If installing the sensor outside Germany, please comply
with the local regulations for calibration intervals.
period, Chapter 8.1)
with the Technical data in Chapter 14.
Remove the sensor from the DLG III or DGM in-line probe housing (see
DLG III, DGM operating instructions)
Immerse the sensor in a container with clean water, free of chlorine and
bromine.
Stir by using the sensor, until the measured value remains stable.
Adjust the controller (DULCOMETER
to it's operating instructions (DULCOMETER
Instructions: Chapter 8, complete operating menu, settings menu
"Calibrating chlorine zero point")
Reinstall the sensor into the in-line-probe-housing (DGM, DLG III)
according to Chapter 7.
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D1C, chlorine) to zero, according
® D1C, chlorine Operating
Operation
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