B l u e C o n n e c t – C o n f i g u r i n g t h e S e n s o r M o d u l e s
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4.8.2 The Calibration Window O2
The calibration of the O2 sensor is a two-point calibration (calibration degree 0 poly-
nomial). One point is the zero point, the other is determined by the
saturation in air
(100 %) or a pair of measured values from the measurement value of the sensor and
the measurement value of a
reference measurement device
in the same measure-
ment medium.
Starts and stops the measurement display,
the measurement values are displayed every sec-
ond.
Reference calibration
Prerequisite: Setting
O2 Unit mg/l
see
4.8.1The Parameter Window
1.
Click on <Start>
2.
Immerse the oxygen sensor in your measurement medium and wait,
until the displayed values are stable.
3.
Entering
1
the oxygen content of the measurement medium according to the
reference measuring device
4.
Click on <mg/l Calibration>.
5.
The calibration is completed.
Saturation calibration
Prerequisite: Setting
O2 Unit %
see
4.8.1 The Parameter Window
1.
Click on <Start>.
2.
Hold the oxygen sensor in the air.
2
Wait at least 10 minutes until the displayed values are stable.
3.
Click on <100% Calibration>.
4.
The calibration is completed.
Note:
Decimal separator is the comma; if a dot is entered, an error message appears.
1
Decimal separator is the comma; if a full stop is entered, an error message appears.
2
The galvanic cell for oxygen measurement is located at the bottom of the sensor body, the temperature sensor is near the
center. Therefore, a saturation calibration in the air can only be carried out when the entire sensor body has reached the tem-
perature of the ambient air. The larger the difference in temperature between the measuring medium and the ambient air, the
greater the time required for a temperature adjustment (30 minutes or more, if applicable).
The temperature adjustment can be accelerated by immersing the sensor in water, which has approximately the temperature
of the ambient air, before performing the saturation calibration.
Moreover, abrupt temperature changes (e.g., by direct exposure to the sun) must be avoided.
Serial Communication
Modbus
BlueConnect O2
Info
Parameter
Calibration
Measuring
Data Processing
Data
Oxygen
mV
Reference [mg/l]
mg/l
Temperature
°C
read
mg/l Calibration
Oxygen
mV
Temperature
°C
read
100% Calibration
read
read
Reference calibration
Saturation calibration
