NeuLog NUL-205 User manual

NEULOG OXYGEN LOGGER SENSOR GUIDE
NeuLog oxygen logger sensor
NUL-205
The oxygen sensor can be used for any science experiment where oxygen levels,
dissolved or gaseous, are required. Some fields of study include Chemistry,
Physiology, Exercise Science, Biochemistry, Biology, Earth Science, Environmental
Science, etc.
The sensor comes pre-calibrated so you can start experimentation right out of the box
using this guide.
Just a few of the thousands of possible experiments that can be performed with the
NUL-205 sensor are: Monitoring of ecological systems, combustion reactions, oxygen
consumption rates, studying photosynthesis, testing chemical solutions and hydrogen
peroxide decomposition.
This sensor is practical for testing in school laboratories as well as in the field and has
two modes of operation: open air mode to test gaseous oxygen concentration
(percentage of oxygen in the air), and dissolved oxygen mode for the testing of liquids
(mg/L and percentage dissolved oxygen in a liquid).
The measurement units for this sensor are:
Oxygen % in air: The concentration of gaseous oxygen present in the
sample.
mg/L: Total mass of dissolved oxygen per liter of a given liquid sample.
Oxygen % in water: The percentage of dissolved oxygen present versus the
maximum level of oxygen saturation.
Sensor offset:
Although the NeuLog oxygen sensor does not need to be calibrated prior to each use,
it is recommended to offset its probe.
Open air mode:
Offset of the probe assumes a standard atmospheric oxygen concentration of 20.9%
(assuming stable levels in the Earth’s atmosphere at sea level).
1. Connect the oxygen sensor to a voltage source (USB-200, BAT-200, WiFi-201).
Wait about 5 minutes after connecting the sensor to the voltage source before
you begin calibration and measurements. For a more accurate measurement,
look at the module window and wait for the reading to stabilize (it could take a
little longer).
2. Remove the blue rubber cap from the oxygen sensor. Unscrew the membrane
cap, fill half of it with the filling solution and screw it back.
3. Press and hold the oxygen sensor’s push button for 3 seconds while pointing the
probe’s tip towards the ground.
Dissolved oxygen mode:
Inserting air into water with an air pump or a 50 ml syringe will saturate the water to
100% of its capacity. The quantity (mg/L) depends on the water temperature.
1. Connect the oxygen sensor to a voltage source (USB-200, BAT-200, WiFi-201).
2. Remove the blue rubber cap from the oxygen sensor. Unscrew the membrane
cap, fill half of it with the filling solution and screw it back.
3. Submerge the sensor in water.
4. Saturate the water with oxygen using an air pump (manual or electric).
5. Press and hold the oxygen sensor’s push button for 3 seconds.
Quick start procedure:
PC or Mac Computer
Materials needed:
NUL-205 Oxygen Sensor
USB-200 USB Module
USB to mini USB cable (included with the USB-200 module)
Your oxygen sensor needs to be connected to a USB-200 module. The USB-200
module then connects to a computer via a USB to mini-USB cable. Please note that
you cannot plug the oxygen sensor directly into the computer.
Resident PC software and browser based application can be downloaded for free at
www.neulog.com/Download/SoftwareandApplication.aspx as well as a full software
user guide.
Note: Make sure not to download and install both types of software they will conflict
on the computer.

NEULOG OXYGEN LOGGER SENSOR GUIDE
Procedure:
1. Install the Neulog software.
2. Connect the USB-200 Module to the PC or Mac.
3. Connect the oxygen Sensor to the USB-200 module (they directly plug together).
4. Open the Neulog software.
5. Once the oxygen sensor logo appears on the left side of the screen, the probe
has been automatically identified and you can begin experimentation.
6. If the oxygen sensor is not automatically identified, click the "Search for sensors"
icon to find the sensor.
7. Select the “On-line experiment” button; this will open a graph below.
8. Click on the “Module setup” button located on the oxygen sensor icon in the
module window to change the oxygen probe settings if need be (open air or
dissolved oxygen mode for example).
9. Remove the blue rubber cap on the end of the oxygen probe. Unscrew the
membrane cap, fill half of it with the filling solution and screw it back.
10. Prior to initial use, the Neulog oxygen sensor needs to be offset; please review
the “Sensor Offset” section above.
11. Click on the “experiment setup” button to change the experiment settings if need
be (experiment duration for example).
12. The oxygen sensor will give a live reading in the box to the left of the screen
when running.
13. To run an experiment and collect data, click “Run experiment”.
14. To end data collection early, click “Stop experiment”
Tablet, smart phone device
Materials needed:
NUL-205 Oxygen Sensor
WiFi-201 WiFi Module
BAT-200 Battery Module
Your oxygen sensor needs to be connected to a WiFi-201 Module. The WiFi-201
Module will create a closed Neulog WiFi network which will stream the Neulog data to
the device of your choosing. Once your device is wirelessly connected to the Neulog
network, you can run experiments and collect data through a browser of your
choosing.
Procedure:
1. Connect the oxygen sensor directly to the left side of a WiFi-201 module (no
wires required).
2. Connect a BAT-200 to the right side of the WiFi-201 module.
3. Although not required, we recommend plugging the BAT-200 to an outlet using a
USB to mini USB charger (such as a typical cell phone charger). The WiFi-201
module will run for 15-75 minutes (depending on the sensor) without being
plugged in.
4. The WiFi-201 can be powered directly using a mini to USB cord and plugging it
into your computer or a wall charger. Please note this function is only available
on WiFi units with the USB icon on the cover.
5. For further WiFi-201 instructions or the WiFi-201 quick start guide please visit:
www.neulog.com/Download/SoftwareandApplication.aspx
The WiFi-201 indicator lights will flash; take no action until the LED to the far left
turns blue; this can take up to one minute.
6. Take your tablet or smart phone, go to the Wi-Fi settings and select the Neulog
network which matches the WiFi Module ID found on the back of the WiFi-201
device. (NeuLogXXXX for example).
7. Give your device about 20 seconds to connect to the WiFi-201.
8. Once the device is connected, go to your browser and type the website
wifi201.com into the URL bar, then wait for 30-60 seconds.
9. You will see a “Control mode” icon in the browser, click on this icon.
10. The browser will then load a new screen and begin to auto detect the sensor(s);
this can take a minute. (You can stop the search when the sensor is found.)
11. If the browser does not auto detect the sensor(s), select “Search for sensors”.
12. Once the sensor is found, you will see an icon on the left side of the screen for
the oxygen sensor. The icon will display real time data.
13. To set the oxygen probe settings, click on the “Module setup” button located on
the oxygen sensor icon on the left side of your screen (open air or dissolved
oxygen mode for example).
14. Remove the blue rubber cap on the end of the oxygen probe. Unscrew the
membrane cap, fill half of it with the filling solution and screw it back.
15. Prior to initial use, the Neulog oxygen sensor needs to be offset, please review
the “Sensor Offset” section above.
16. To change the experimental settings, click on the “Experiment setup” button
(experiment duration for example).
17. To run an experiment and collect data, select “On-Line” experiment, then select
"Run experiment".
18. If you have a newer generation WiFi-201 (with the USB icon on the cover) this
can be used as a USB-200, meaning you can tether the probes directly to the

NEULOG OXYGEN LOGGER SENSOR GUIDE
computer using the WiFi-201. To engage operation in this fashion, press 3 times
on the panel key. Repeating this operation will return the unit to WiFi mode.
Operation with NeuLog viewer
Materials needed:
NUL-205 Oxygen Sensor
VIEW-101 Graphic Display Module
BAT-200 Battery Module
Procedure:
1. Connect the oxygen sensor to the left side of the viewer.
2. Connect the BAT-200 module to the right side of the viewer.
3. The VIEW-101 will auto detect the sensor and you will see it appear on the left
side of the screen.
4. Once the sensor appears, it will be monitoring data in real time.
5. Remove the blue rubber cap on the end of the oxygen probe. Unscrew the
membrane cap, fill half of it with the filling solution and screw it back.
6. Prior to initial use, the Neulog oxygen sensor needs to be offset, please review
the “Sensor Offset” section above.
7. To run an experiment and collect data click the run button (little green person)
Off-line experiments
(Off-line experiments are when you do not have a sensor connected directly to a
computer, tablet, smartphone, or NeuLog viewer).
Materials needed:
NUL-205 Oxygen Sensor
BAT-200 Battery module
Materials needed to configure your offline experiment:
USB-200 Module, WiFi-201 module or VIEW-101 Module
USB to mini USB cable (included with the USB-200 module)
Procedure:
1. Connect the oxygen sensor directly to the left side of the charged BAT-200
module
2. Remove the blue rubber cap on the end of the oxygen probe. Unscrew the
membrane cap, fill half of it with the filling solution and screw it back.
3. Prior to initial use, the Neulog oxygen sensor needs to be calibrated; please
review the “Sensor Offset” section above.
4. When ready to collect data, press the “Start/Stop” button on the oxygen sensor;
a red light will turn on for the duration of the experiment.
5. To change the experiment settings, first connect to your chosen device (PC,
Mac, tablet, smart device) and select the “Module setup” button. (For more
information on how to change experiment settings, view quick start procedure
section for your chosen device in this document.)
6. After the experiment has concluded (when the “Start/Stop” button is pressed
again or the data collection period ends) connect the sensor to your chosen
device (you can find full instructions in each device’s quick start procedure
section).
7. Open the Neulog software.
8. Click the “Off-line experiment” button.
9. Click the “Load data from sensors” button.
10. Select which experimental data to upload (5 experimental runs can be stored at
one time on the NUL-205 oxygen sensor).
Restoring sensor’s factory default settings:
Procedure:
1. Connect the USB-200 to a PC, Mac, tablet, or smart device.
2. Connect the oxygen sensor to a USB-200 module (they directly plug together).
3. Open the NeuLog software.
4. Click the “Tools” icon.
5. Click “Restore sensor’s factory defaults” icon.
6. If prompted to clear the graph, click either the “Off-line experiment” or “On-line
experiment” button (whichever you are using).
7. Click “Clear experiment results”.
8. Resume from step 4.

NEULOG OXYGEN LOGGER SENSOR GUIDE
Included with sensor:
NeuLog NUL-205 Oxygen Sensor Guide (this document).
Neulog oxygen sensor probe attached to the sensor's body by a durable rubber-
coated wire.
30 mL 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
Accuracy (>15%)
+/- 1%
Accuracy (<5%)
+/- 4%
Sensor's 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 -http://www.neulog.com/Portals/3/Users/Experiment%20C-
5%20Combustion%20Ver%203.3.5.pdf
Gas solubility –
http://www.neulog.com/Portals/3/Users/Experiment%20C-
6%20Gas%20Solubility%20Ver%203.2.4.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 (oC, oF, Lux, %, ppm, for example).
The sensor is pre-calibrated at the factory. The built-in software in the logger can be
upgraded for free at any time using the provided firmware update. In spite of that, the
probe needs to be offset prior to initial use. Please review the “Sensor offset” guide at
the beginning of this document for detailed instructions.
The sensor is based on a Clark type probe that includes a platinum electrode and an
AgCl electrode placed in a KCl electrolyte; all is covered by a Teflon membrane.
Oxygen molecules diffuse through the membrane oxidizing the AgCl electrode; this
accepts positive potential while the electrolyte accepts negative potential according to
the following equations:
2AgCl → 2AgCl++ 2e-
O + H2O + 2e-→ 2OH-
The potential difference of the electrodes is converted into an oxygen measurement
by the sensor's controller using the temperature compensation calculation.
Sensor usage and storage:
Prior to use:
1. Remove the blue rubber cap from the NeuLog oxygen probe.
2. Unscrew the tip-end membrane cap of the probe, inside you will see a metal
electrode.

NEULOG OXYGEN LOGGER SENSOR GUIDE
3. Add 1 mL of the “DO Filling Solution” directly into the tip-end which was just
unscrewed.
4. Carefully reattach the tip-end of the probe by screwing it back into the probe.
5. Do not replace the blue rubber cap until after testing.
Storage:
Short-term (less than 24 hours):
For short term storage, fill a beaker with enough distilled water to cover the membrane
cap of the oxygen probe. With the membrane cap still attached to the probe, place its
tip side down in the distilled water. This easy method is ideal for short term storage,
between trials for up to 24 hours.
Long-term (more than 24 hours):
1. Unscrew the membrane cap from the oxygen probe.
2. Discard the DO filling solution from the membrane cap.
3. Rinse the cap with distilled water and gently shake to air dry.
4. Rinse and dry the exposed metal electrode with distilled water; it can be dried
with lab wipes.
5. For storage purposes: Loosely reattach the membrane cap to the oxygen probe.
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. Do not leave the membrane cap with filling solution for more
than two days.
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 acid or base.
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.
Warranty:
We promise to deliver our sensor free of defects in materials and workmanship. The
warranty is for a period of 3 years from the date of purchase and does not cover
damage of the product caused by improper use, abuse, or incorrect storage. Sensors
with a shelf life such as ion selective probes have a warranty of 1 year. Should you
need to act upon the warranty, please contact your distributor. Your sensor will be
repaired or replaced.
Thank you for using NeuLog!
Flexible, simple, fast, forward thinking.
W: www.neulog.com
E: [e-mail]
A: 850 St Paul Street, Suite 15, Rochester, NY 14605
P: 1.866.553.8536
V05162013