Water Analytics AquaMetrix AM-ODO2 Operation Manual

Optical dissolved oxygen probe

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AquaMetrix AM-ODO2

Optical Dissolved Oxygen Probe

AM-ODO2 Operation Manual

Rev 1

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Page 1 AquaMetrix AM-ODO2 Optical Dissolved Oxygen Probe AM-ODO2 Operation Manual Rev 1...
Page 2 Contents Introduction ............................3 Application notes ..........................3 Installation ............................4 3.1. Dimensions and Schematics ....................... 5 3.2. Connections to power supply and controller ................5 3.3. Conversion Equations ......................... 5 3.4. Magnet-switched commands and LED indicator ................ 6 Calibration ............................6 4.1.
Page 3 1. Introduction The AM-ODO is one of the most compact, durable, and easiest to use dissolved oxygen sensors on the market. It is an optical sensor that utilizes fluorescence quenching technology. With this technology, the quenching of fluorophores by dissolved oxygen molecules decreases the fluorescence intensity and lifetime, the latter of which is detected by a photodetector and allows the dissolved oxygen (DO) concentration to be quantified accurately and consistently.
Page 4 3. Installation The AM-ODO2 can be connected to an AquaMetrix AM-2300 controller or any PLC. The probe can output either a single output (%-sat or ppm) or dual outputs (%-sat and ppm). An optional configuration outputs the temperature or pressure as a second parameter. The AM-2300 can connect up to 4 AM- ODO2 sensors without use of an external power supply.
Page 5 3.1. Dimensions and Schematics Figure 3- Dimensions and wiring information. 3.2. Connections to power supply and controller Wire color Description Power (5 ~ 36 VDC) Black GND (ground is shared between the power input and signal output, please make sure grounds are connected if external power supply is used) Green UART_RX (for upgrading or PC connection ) White...
Page 6 3.4. Magnet-switched commands and LED indicator Special commands can be performed using a magnetic switch controlled by a user's magnet. Tapping the magnetic marker of the probe is indicated with a bicolor red/blue LED. This LED is used to confirm the taps and the activation of the corresponding commands.
Page 7 4.2. Calibration in water-saturated air (convenient method and error < 2%) Alternatively, calibration can be done in water-saturated air, but will result in an error of as much as 2%. The recommended procedures is: 1. Immerse the sensor cap and temperature sensor of the probe in fresh/tap water for 1 to 2 minutes (power needed).
Page 8 (ppm) or yellow (%-sat) wire. The expected reading in the air would be ≈100%sat (or ≈8ppm) which would result 12mA on the yellow wire or ≈10-11mA on the blue wire. If the output is stuck at 4mA or 20 mA – the sensor is not working. Please contact support@wateranalytics.net or call Water Analytics technical support 978.749.9949...