Transmission Of The Temperature; Calibrating The "Zero Conductivity" Point - Burkert 8223 Manuel Utilisateur

3.5 TRANSMISSION OF THE TEMPERATURE

If, instead of the conductivity, the 8223 sensor is meant to transmit the tem per a ture
(be tween -10 °C and 80 °C) to the 4-20 mA output, configure SW2 as follows:
Transmission of the
temperature to the
4-20 mA output
Thus the conductivity measuring range chosen with SW1 is not taken into account.

3.6 CALIBRATING THE "ZERO CONDUCTIVITY" POINT

The "zero conductivity" point of the sensor can drift in time. To check whether the sensor is
correctly calibrated or not, measure the conductivity of the air (conductivity = 0).
- Dismantle the sensor from the pipe.
Ensure the finger orifice the fluid passes through is clean and dry.
- If the conductivity of the air > 0 (the current output indicates a value > 4 mA and
the green LED flashes at a frequency between 0.5 and 16 Hz), press the push
button for at least 2 s: both LEDs light up and the sensor starts calibrating its
zero conductivity" point.
Push-button
Green LED
The operation can last a few minutes.
The calibration is finished when the two LEDs are not steadily lit any more. Then:
- If the red LED switches off and the green LED flashes rapidly every 2 s, the sensor
is correctly calibrated.
- If the green LED lights up and the red LED flashes 3 or 4 times every 2 s, the
calibration has failed: press the push-button briefly to go back to normal operating
using the parameters of the previous calibration.
- If the calibration fails several times in a row, contact your Bürkert agent.
CONFIGURATION
Position of the switches of SW2
1 2
ON ON
12
3 4
ON ON
Red LED
8223