Table of contents Table of contents Product type .................. 2 Table of contents ................3 General Security Notes ..............5 Intended use .................. 7 Getting started ................8 Getting started – Short version ........... 11 Maintenance and cleaning ............12 Cleaning ...................
Page 4
Table of contents Used symbols and wording DANGER! Warning of life threatening dangers. WARNING! Warning of possible life threatening and / or severe irreversible injuries. ATTENTION! Warning of possible medium or slight injury. ATTENTION! Follow the notes to avoid damage of equipment. NOTE! Further information for the use of the device.
General Security Notes General Security Notes The oxygen sensor O2S is an electronic unit for the measurement of the concentration of dissolved oxygen in water and must be used in combination with SENECT control units. Since it is an electronic product the common prerequisites for a safe instrument usage must be fulfilled.
Page 6
0°C and +40°C. It is not allowed to modify the sensor, to open the housing or to insert anything into the housing. The oxygen sensor O2S is designed to be operated by professional users. However, it can be operated by children...
Intended use Intended use The oxygens sensor O2S can be used to measure the concentration and saturation of dissolved oxygen (O ) in water in aquaculture applications. It has a measurement range from 0 to 200% air saturation (a. s.) or 0 to 20 mg O l at temperatures between 0°C and +40°C.
Getting started Getting started Scope of delivery o 1 x Oxygen sensor O2S o 1 x Manual Note Please check directly after delivery, that the package is not destroyed or damaged or was opened before. Please check also, that all parts as listed above are included.
Page 9
Getting started at least to 80% submerged, since the temperature is measured on the sensor housing. When the sensor will be installed at a location with a changing water level, it can be mounted free swimming on a float or completely submerged. Fig.
Page 10
Connect the blue marked plug of the sensor with a sensor input port (also blue marked) of your control unit. The SENECT control units recognize the sensor itself and start automatically the measurements. Take into account that the measurement interval is set to...
Getting started – Short version The oxygen sensor O2S is factory calibrated and need to be recalibrated – under for aquaculture typical environmental conditions – after 6 months. Getting started – Short version 1. Mount the sensor submerged. 2. Mount the black electronic interface at a protected location.
Maintenance and cleaning Maintenance and cleaning The O2S oxygen sensor measures the oxygen concentration optically. This principle enables long-term stable measurements with a high precision. However, dirt can influence the measurements. For example, a biofilm on the sensing membrane can lead to measurements of the oxygen concentration of the biofilm and not of the surrounding water.
Maintenance and cleaning Recalibration The recalibration is recommended for typical applications every 6 months. However, a regular weekly check of the oxygen reading in humid air (should be ~ 100% a.s.) can be used to check if the sensor needs calibration. In some applications, e.g.
Page 14
Maintenance and cleaning Depending on the actual software version, the menu can be different. You find the latest manuals at www.senect.de. Sensors S1: O2S Name Sensor Calibration O2 % a. s. 0% a.s. 100% a.s. Factory settings Temperature Calibration Point 1...
Maintenance and cleaning Oxygen signal: 1-Point-calibration Place the sensor for several minutes at humid (100% water vapour saturated) air and ensure, that there are no water drops on the membrane. Select in the menu „Sensors“ the oxygen sensor (O2S) and choose „Sensor calibration/ O2 % a.s.“.
Page 16
Maintenance and cleaning Alternatively, you can use air saturated water to create a 100% a.s. oxygen solution. Aerate therefore water with an air pump and diffusor stone. After several minutes, the water should be equilibrated with the air. This equilibrated water has by definition an oxygen concentration of 100% air saturation.
Maintenance and cleaning Short-version: Oxygen signal: 1-Point-calibration 1. Place the sensor in air 2. Menu / Sensors / O2S / Sensor calibration / O2 % a.s. / 100% a.s. 3. Wait 120 s. 4. Press OK. Finished! Oxygen signal: 2-Point-Calibration For the 2-Point-Calibration perform at first the previous step (calibration of calibration point 2, e.g.
Maintenance and cleaning Temperature: 2-Point-Calibration To calibrate the temperature signal of the O2S, two calibration points are necessary. The calibration point 1 must have a lower temperature (e.g. 0°C) than calibration point 2. This temperature must be lower than 20°C. The calibration point 2 (higher temperature) must be between 30°C and 50°C.
This information (together with more internal sensor data) can be sent directly to SENECT for troubleshooting service. Select in the Menu “Sensors / O2S / Calibration / Info to SENECT” to send the data via email to SENECT GmbH & Co. KG.
Maintenance and cleaning Salinity / Conductivity correction By connecting an SENECT conductivity sensor CON to the SENECT control unit, an automatic salinity correction based on conductivity measurements for the oxygen measurement can be made (“Sensors / O2S / Salinity correction” – Mode: From sensor cor.).
Technical data Technical data Dimensions probe: Ø 12 mm, length: 85 mm Weight probe ca. 100 g Cable length total: 10 m Voltage: 24 V DC Power consumption: << 1 W Temperature range: 0° to 40 °C Max. pressure 3 bar Measurement range: 0 - 200% / 0 - 20 mg O Precision oxygen:...
Information about the correct disposal L = 5 m, Ø 5 L = 5 m, Ø 5 Interface (silicone housing) stainless steel 1.4435 exchangeable sensor cap d = 30 Ø12 Dimensions in mm (not to scale). Fig. 3: Sensor dimensions.
Alternatively, you can also send the product back to the producer. The SENECT GmbH & Co. KG is member of the Stiftung Elektro-Altgeräte Register and the products are registered (WEEE-Reg.-Nr.: DE37193510).
Need help?
Do you have a question about the Oxygen Sensor O2S and is the answer not in the manual?
Questions and answers