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8 Calibrating sensors
84
8.4
JUMO ecoLine NTU (type 202670)
8.4.1
General information
As with all optical sensors, the JUMO ecoLine NTU is subject to sensor aging
and sensor drift during operation. The effects of these factors are compen-
sated for by calibration.
Calibration methods
For the JUMO ecoLine NTU sensor, the JUMO AQUIS 500 RS offers the 2-
point calibration method for each of the 4 measuring ranges of the sensor.
Calibration interval
The sensor is calibrated ex works, meaning that no calibration is required
before initial startup. During operation, the sensor should be calibrated in the
event of deviating measured values and should also be cleaned regularly
(depending on the degree of contamination by the process medium).
Preparatory work
• Rinse the sensor with clear water.
• Carefully remove any biofilm or sludge that has remained on the sensor
optics with a soft sponge and warm, soapy water.
• Remove calcium deposits by submersing the sensors in a diluted hydro-
chloric acid solution (concentration max. 5%) for several minutes.
Never use abrasive agents (e.g. a scouring sponge)!
Calibration can basically be initiated as follows:
• Press the
key if this has been enabled in
ADMINISTR: LEVEL > PASSWORD > CALIB. ENABLE
• Via ADMINISTR: LEVEL > PASSWORD > CALIB. LEVEL
• Via CALIB. LEVEL in the main menu, if this has been enabled in
ADMINISTR. LEVEL > PASSWORD > CALIB. ENABLE
NOTE
If the JUMO ecoLine NTU sensor is to be operated in the automatic measur-
ing range switchover mode, all 4 measuring ranges must be calibrated.
NOTE
When starting the calibration, the device sets the analog outputs, switching
outputs and controllers to the following states by default:
• "Moving" (analog outputs)
• "Inactive" (switching outputs)
• "HOLD mode", output level frozen (controller)
Содержание AQUIS 500 RS
Страница 5: ...Contents 12 5 Template for panel cut out 114 13 China RoHS 116 14 Index 117...
Страница 8: ...2 Description 8 Block diagram...
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Страница 111: ...111 12 Appendix 12 4 Flow diagram of the basic setting wizard 12 4 1 Automatic configuration of a sensor...
Страница 112: ...12 Appendix 112 12 4 2 Manual configuration of a sensor 1 Only for temperature sensor MODBUS...
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Страница 114: ...12 Appendix 114 12 5 Template for panel cut out...
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