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  Category : Calibration, Calibration Coefficients, Accuracy and Precision Measurement Related (15) | | Question : CCAP 01 - What calibration coefficients are used in the sensor, how can I make sure that I use the correct ones? (1) | | Question : CCAP 02 - If I change the foil and forget to update the internal constants but I made a new calibration can I back-calculate to get the correct data? (1) | | Question : CCAP 03 - It appears as if the specifications for accuracy and precision of the sensor are conservative compared to its actual performance, why? (1) | | Question : CCAP 04 - Can the accuracy of the sensor be further improved? (1) | | Question : CCAP 05 - How often do I need to re-calibrate the sensor? (1) | | Question : CCAP 06 - The brochure says accuracy of 8µM or 5% (whichever is greater). (1) | | Question : CCAP 07 - Is there a minimum measuring point or will the sensor go all the way down to zero? (1) | | Question : CCAP 08 - When calibrating, which substance should I use to remove the oxygen in the water? (1) | | Question : CCAP 09 - When calibrating at saturation, which type of device should I use to get 100% saturation? (1) | | Question : CCAP 10 - When calibrating which type of vials/containers should be used? (1) | | Question : CCAP 11 - When sampling the sensors at high frequencies (1-10 s intervals) there appears to be some self heating of the sensor. (2) | | Question : CCAP 12 - I am measuring in the laboratory and the sensors are oscillating regularly with an amplitude of a couple of µM. (1) | | Question : CCAP 13 - Is there a difference in the sensor response if the foil is wet or dry? (1) | | Question : CCAP 14 - We have problems with our Oxygen Optode 4130. How can we connect the sensor to the computer and set up new coefficients in the sensor (applies to 4130)? (1) | | Category : Measurement Related (30) | | Question : MR 01 - Can I measure oxygen in air with the sensor? (1) | | Question : MR 02 - What is the reason that several sensors plunged into the same water do not give exactly the same values? (1) | | Question : MR 03 - What physical factors will affect the sensor? (1) | | Question : MR 04 - What chemical factors/elements will affect the sensor? (1) | | Question : MR 05 - Is the sensor sensitive to H2S? (1) | | Question : MR 06 - What is the pressure behavior of the sensor? (1) | | Question : MR 07 - What about hysteresis? (1) | | Question : MR 08 - Can I log data of oxygen concentration, oxygen saturation and temperature simultaneously on the SR10 output (e.g. on a RCM9/RCM11/Buoy etc.). (1) | | Question : MR 09 - Why is the sensor limited to a range of 0-120% and 0-500 µM (does not apply to 4130 and 3930)? (1) | | Question : MR 10 - How fouling sensitive is the sensor? (1) | | Question : MR 11 - For how long time can you run the sensor before it will not work anymore? (1) | | Question : MR 12 - Can the 3830 sensor be used down to full ocean depth just by connecting it to a standard titanium connector from Aanderaa (applies to 3830)? (1) | | Question : MR 13 - Can I use the sensor for long-term measurements, in for example an on-line system, just by connecting it to a PC with the PC communication cable (model # 3855) that was delivered with the sensor? (1) | | Question : MR 14 - The Aanderaa Optode and/or software appear to be programmed to only report percent saturation relative to sea level. (1) | | Question : MR 15 - How high operation and storage temperature can the sensor stand? (1) | | Question : MR 16 - After calibration the maximum reading we can get in air at room temperature is 94.1 instead of 100. Do we need to replace the oxygen sensing foil? (1) | | Question : MR 17 - Is there a difference in the sensor response if the foil is wet or dry? (1) | | Question : MR 18 - I have mounted my sensors in chambers. (1) | | Question : MR 19 - I have mounted my sensors in chambers to make sediment-water incubations at the bottom. (1) | | Question : MR 20 - I am measuring in the laboratory and the sensors are oscillating regularly with an amplitude of a couple of µM. (1) | | Question : MR 21 - How do I convert oxygen data logged by the optode to other units? (1) | | Question : MR 22 - What is the use of the phase, amp and rawTemp data in the long RS232 data format when using the Optode in stand alone mode (does not apply to 4130 and 3930)? (1) | | Question : MR 23 - Why is salinity compensation needed? (1) | | Question : MR 24 - How does the air pressure influence the O2 concentration? (1) | | Question : MR 25 - How does the salinity and temperature influence the O2 concentration? (1) | | Question : MR 26 - What is influencing the O2 concentration in water? (1) | | Question : MR 27 - Does the sensor react to changes in salinity? (1) | | Question : MR 28 - Does the % saturation level change with the salinity compensation? (1) | | Question : MR 29 - I’m going to have a deployment in ocean water with constant salinity (35 ppt). Is it possible to preset the internal setting in the sensor, to avoid post calibration? (1) | | Question : MR 30 - I have a 3660 data logger with AADI sensors connected to it and there are some problems with it. Sometimes data from all sensors shift values and follow each other and all becomes wrong. Why? (1) | | Category : Mechanical and Maintenance (4) | | Question : MM 01 - How do I clean the foil after a deployment if it has been fouled? (1) | | Question : MM 02 - My foil has been damaged so that I can see scratches in the black protective layer and some blue light is coming out when measuring. Do I need to change the foil? (1) | | Question : MM 03 - I have an old RCM7/RCM8, can I mount the Optode and log it with this instrument? (1) | | Question : MM 04 - The foil (fast response) looks specled, some spots look lighter than other spots. (1) | | Category : Response Time and Performance Checks (3) | | Question : RTPC 01 - Why is the response time of the sensor slow? (1) | | Question : RTPC 02 - What is the maximum sampling rate of the sensor? (1) | | Question : RTPC 03 - Can I check that the sensor is giving correct readings without doing any Winkler titration’s? (1) | | Category : Software, Settings, Communication and connection to various dataloggers (including CTD's) (15) | | Question : SSC 01 - How do I most easily communicate and use the sensor from my PC? How do I calibrate it and set it up? (1) | | Question : SSC 02 - Many new PC’s do not have a serial port. How can I communicate with the sensor without this? (1) | | Question : SSC 03 - Which COM port is normally used when I use an USB/serial adaptor. (1) | | Question : SSC 04 - Is OxyView required to change the sampling interval? If not, how is it done? (1) | | Question : SSC 05 - What is the minimum supply voltage for the sensor? (1) | | Question : SSC 06 - What is the peek current consumption for the sensor? (1) | | Question : SSC 07 - Is it possible to drive the Rx, Tx signals from the Optode directly by the 0-5V without a transceiver? (1) | | Question : SSC 08 - When logging the sensor in RS232 format what is the minimum of signal lines we have to connect (does not apply to 4130 and 3930)? (1) | | Question : SSC 09 - If you switch ON / switch OFF the power supply between the data acquisition, do you have to keep a delay time before acquiring some data or after a new switch ON? (1) | | Question : SSC 10 - If I have internally set the sensors sample interval to 2 seconds and then decide to mount it on e.g. an RCM9 current meter, logging at a 1 hour sample interval, (1) | | Question : SSC 11 - I have connected the Optode to my Aanderaa current meter but no data is delivered from the sensor, why (applies to 3830, 3835, 3930 and 4130)? (1) | | Question : SSC 12 - What should I think about if I want to use the optode mounted on a CTD or a towed vehicle? (1) | | Question : SSC 13 - How should I connect and mount the sensor on for example a CTD or a towed vehicle? (1) | | Question : SSC 14 - When powered on does the Optode expect a “XON” command before it starts or does it just start sending data? (1) | | Question : SSC 15 - I am going to use Oxygen Optode 3835 together with cable 3485. Where do I find the correct pin connections for RS-232 operation? (1) |
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