KROHNE OPTISENS ODO2000, Руководство пользователя

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OPERATION
5
25
OPTISENS ODO 2000
www.krohne.com 10/2016 - 4003689502 - MA OPTISENS ODO 2000 R02 en
5.2 Calibration
The calibration of the probe must satisfy this sequence:
• calibration of sensitivity in water-saturated air
• calibration of the zero point in sodium sulfite solution Na
2
SO
3
(or other adequate 0 standard
solution/gas)
Replace the sensing element if:
• mechanically damaged
• after the calibration procedure it does not produce the expected values
Before the sensitivity calibration it is necessary to allow the internal temperature sensor to
adjust the ambient temperature. This time could be equal to 5 or 10 minutes depending of the
difference between the sensor and the ambient temperature.
The sensitivity calibration is done with the sensor in water-vapor saturated air inside a dark
beaker or cup with a little bit of water on the ground.
The zero point calibration is done in sodium sulfite Na
2
SO
3
solution.
Optical components such as LED and photodiodes as well as the sensing element (replaceable)
can have a small drift during their lifetime.
Checking and periodic calibration of the probe is always necessary to ensure the accuracy of the
sensor.
INFORMATION!
Insure that the sensor is clean and free from any deposits on the measurement element (optical
disk). Please clean with clear water and a soft cloth as some deposits might not visible to our
eye.