Carolina NeuLog Oxygen Manuel d'utilisateur Page 5

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NEULOG OXYGEN SENSOR GUIDE
Included with sensor:
NeuLog NUL-205 Oxygen Sensor Guide (this document).
Neulog oxygen sensor probe which is attached to the sensor body by a durable
rubber-coated wire.
30mL oxygen sensor filling solution.
Replacement membrane cap for the oxygen sensor.
Sensor specifications
In air
Dissolved
(%)
Dissolved
(mg/L)
Range and
operation
modes
0 to 25%
0 to 125%
0.01 mg/L
ADC resolution
12 bit
Resolution
0.01%
0.01%
0.01 mg/L
Max sample
rate (S/sec)
100
Sensor features:
Fully digital data.
Rugged plastic ergonomic case.
Push button switch for Start/Stop experiments in off line mode.
LED indicator of experiment status (blinks while collecting data).
Attached probe cased in durable plastic.
Note: Neulog products are intended for educational use.
Videos and experiment examples:
Videos, literature and other probes can be found at www.neulog.com
http://www.neulog.com/Products/oxygenloggerSensor.aspx
Respiration -
http://www.neulog.com/Portals/3/Users/Experiment B-3 Respiration Ver 3.2.5.pdf
Combustion - www.neulog.com/Portals/3/Users/Experiment C-
5 Combustion Ver 3.35.pdf
Gas solubility
http://www.neulog.com/Portals/3/Users/Experiment C-6 Gas Solubility Ver
3.2.4.pdf
Technical background:
The philosophy behind Neulog‟s plug and play technology is based on each sensor‟s
ability to store its own data due to an internal flash memory chip and micro-controller
in each plastic Neulog body. This technology allows the sensor to collect and then
store the digital data in the correct scientific units (
o
C,
o
F, Lux, %, ppm, for example).
The sensor needs to be calibrated prior to initial use, please review the “Sensor
Calibration” guide in the beginning of this document for detailed instructions.
An electrochemical cell, containing a lead anode and a gold cathode which are
submerged in electrolytes, reacts with oxygen molecules as they enter the cell. The
oxygen is reduced at the gold cathode (meaning it donates spare electrons) to create
a measurable electrical current. The strength of the current is directly proportional to
the amount of oxygen being reduced. Based on the current strength, the oxygen
concentration can be easily calculated
Maintenance and storage:
Never submerge the Neulog sensor‟s plastic body in any liquid.
Do not allow liquid into the Neulog plastic body.
After using the probe wipe off all excess material, liquid or residue from the
oxygen probe body.
Store in a box at room temperature out of direct sunlight.
Do not put the plastic case, or cord of the oxygen probe in an acids or
bases.
Store the oxygen sensor‟s probe upright with the blue rubber tip pointing
downward.
Do not use the sensor in acid or alkaline solutions with a molarity greater
than 1.0.
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