NeuLog NUL-220 User manual

NEULOG CO2 LOGGER SENSOR GUIDE
NeuLog CO2logger sensor
NUL-220
The CO2Sensor can be used for any science experiment where CO2levels 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.
This sensor is practical for testing CO2levels both in laboratories and in the field. An
electromechanical cell in the sensor reacts with carbon dioxide to produce a voltage
which is directly interpreted to give a CO2 concentration reading.
Among hundreds of possible experiments that can be performed with the NUL-202
sensor are: Monitoring ecological systems, combustion reactions, CO2consumption
rates, studying photosynthesis, testing chemical solutions, hydrogen peroxide
decomposition, and many more.
The NeuLog CO2 sensor's measurement unit is:
Parts per million (ppm): The total number of carbon dioxide molecules per million
molecules sampled.
Sensor offset:
Prior to each use, the CO2 sensor needs to warm up for roughly half an hour. For best
results, plug the CO2 sensor into a USB or battery module and allow it to sit for half an
hour before to collecting data.
Open air mode:
Although the NeuLog CO2sensor does not need to be calibrated, it is recommended
to offset its probe.
The sensor offsets to the standard atmospheric CO2concentration of 380 ppm in open
air (assuming stable levels in the Earth’s atmosphere at sea level).
Materials Needed:
NUL-220 CO2sensor
One of the following (depending on experiment type):
-USB-200 Module (For On-line experiments)
-BAT-200 Battery Module (For Off-line experiments)
-VIEW-101 Graphic Display Module and BAT-200 Battery Module (Optional,
for use with NeuLog Viewer)
Procedure:
1. It is recommended to offset the sensor outside (you can get it out through a
window if it is connected to a USB module).
2. The CO2sensor needs a power supply to properly offset. Connect the CO2
sensor to:
-USB-200 module for On-line experiments
-BAT-200 battery module for Off-line experiments
-VIEW-101 graphic display module and BAT-200 battery module for use with
the NeuLog Viewer.
3. After the sensor has been connected to a power supply for at least 30 minutes,
check that the values are relatively stable.
4. The sensor now needs to be offset -
hold the probe vertically with the opening facing the ground.
5. Press and hold the blue “Start/Stop” button on the faceplate of the sensor for 3
seconds.
6. The CO2Sensor is now offset for use.
Quick start procedure:
PC or Mac Computer
Materials needed:
NUL-220 CO2 Sensor
USB-200 USB Module
A USB to mini USB cable (included with the USB-200 module)
Prior to initial use the NeuLog CO2sensor needs to be offset. Please review the
“Sensor offset” section in this document for detailed instructions.

NEULOG CO2 LOGGER SENSOR GUIDE
Your CO2sensor 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 CO2sensor directly into the computer.
The browser based application can be downloaded for free at www.NeuLog.com as
well as a full application user guide.
Choose "Downloads" on the main menu and then choose "Software and Application".
Procedure:
1. Follow the ‘Sensor Offset” guide in this document.
2. Install the NeuLog application.
3. Connect the USB-200 module to the PC or Mac.
4. Connect the CO2sensor to the USB-200 module (they directly plug together).
Please note that no calibration is required for this sensor.
5. Open the NeuLog application by clicking on the shortcut on the screen.
6. Once a CO2sensor module box appears on the left side of the screen the probe
has been automatically identified and you can begin experimentation.
7. If the CO2sensor is not automatically identified, click the “Search for sensors”
icon to find the sensor.
8. Select the “On-line experiment” icon; this will open a graph below.
9. Click on the “Module setup” button located in the CO2sensor module box to
change the sensor's settings if need be.
10. Click on the "Experiment setup" icon to change the experiment settings if need
be (experiment duration for example).
11. The CO2sensor will give a live reading in its module box while plugged in.
12. To run an experiment and collect data click the “Run experiment” icon.
13. To end data collection early, click the “Stop experiment” icon.
Tablet, smart phone device
Materials needed:
NUL-220 CO2Sensor
WIFI-201 WiFi Module
BAT-200 Battery Module
Prior to initial use, the NeuLog CO2sensor needs to be offset. Please review the
“Sensor offset” section in this document for detailed instructions.
Your CO2sensor needs to be connected to a WIFI-201 module. The WIFI-201 module
will create a closed NeuLog Wi-Fi network which will stream the NeuLog data to a
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. Follow the ‘Sensor Offset” guide in this document.
2. Connect the CO2sensor directly to the left side of a WIFI-201 module (no wires
required).
3. Connect a BAT-200 module to the right side of the WIFI-201 module.
4. 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 60-90 minutes (depending on the sensor) without being
plugged in.
5. 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-201 modules with the USB icon on the cover.
6. For further WIFI-201 instructions or the WIFI-201 quick start guide please visit:
www.NeuLog.com; Choose "Products" on the main menu,
then choose "WiFi Communication module".
7. 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.
8. Take your tablet or smart phone, go to the WiFi settings and select the NeuLog
network (NeuLog0184 for example) which matches the ID found on the back of
the WIFI-201 module (0184 for example).
9. Give your device about 20 seconds to connect to the WIFI-201.
10. 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.
11. You will see a “Control mode” icon in the application, click on it.
12. The application 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.)
13. If the application does not auto detect the sensor(s), select “Search for sensors”.
14. Once the sensor is found you will see a module box on the left side of the screen
for the CO2sensor. In this box, real time data will be displayed.
15. Click on the “Module setup” button located in the CO2sensor module box to
change the CO2probe's settings if need be.
16. Click on the “Experiment setup” icon to change the experiment settings if need
be (Experiment duration for example).
17. To run an experiment and collect data, click the “On-Line experiment” icon, then
click the "Run experiment" icon.

NEULOG CO2 LOGGER SENSOR GUIDE
18. If you have a newer generation WIFI-201 module (with the USB icon on the
cover) this can be used as a USB-200, meaning you can tether the probes
directly to the computer using the WIFI-201. To engage operation in this fashion,
press 3 times on the panel button. Repeating this operation will return the module
to WiFi mode.
Operation with NeuLog Graphic Display Module (viewer)
Materials needed:
NUL-220 CO2Sensor
VIEW-101 Graphic Display Module
BAT-200 Battery Module
Procedure:
1. Follow the ‘Sensor Offset” guide in this document.
2. Connect the CO2sensor to the left side of the viewer.
3. Connect the BAT-200 module to the right side of the viewer.
4. The VIEW-101 will auto detect the sensor and you will see it appear on the left
side of the screen.
5. Once the sensor appears it will be monitoring data in real time.
6. To run an experiment and collect data press the run icon (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-220 CO2Sensor
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. Follow the ‘Sensor Offset” guide in this document.
2. To determine the experiment settings, first connect to your chosen device (PC,
Mac, tablet, smart device) and click on the “Off-line experiment” icon after the
sensor search has ended. (For more information on how to change the
experiment settings, view the quick start procedure section for your chosen
device in this document.)
3. Connect the CO2sensor directly to the left side of a charged BAT-200 module.
4. When ready to collect data press the “Start/Stop” button on the CO2sensor, a
red light will turn on for the duration of the experiment.
5. After the experiment has concluded (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).
6. Open the NeuLog application.
7. Click the “Off-line experiment” icon.
8. Click the “Load data from sensors” icon.
9. Select which experimental data to upload (5 experimental runs can be stored at
one time on the NUL-220 CO2sensor).
Restoring sensor’s factory default settings:
Procedure:
1. Connect the USB-200 to a PC, Mac, tablet, or smart device.
2. Connect the CO2sensor to a USB-200 module (they directly plug together).
3. Open the NeuLog application.
4. Click the “Tools” icon.
5. Click the “Restore sensor’s factory defaults” on the menu.
Included with the sensor:
NeuLog CO2sensor probe attached to the sensor's body by a durable rubber-
coated wire
NeuLog NUL-220 CO2Sensor Guide (This Document)
Glass bottle

NEULOG CO2 LOGGER SENSOR GUIDE
Sensor specifications:
Range and operation modes
350-10,000 ppm
ADC resolution
14 bit
Resolution
1 ppm
Max sample rate (S/sec)
100
Experiment Duration: 1 seconds to 31 days.
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.
In order to access the CO2sensor's page, choose "Products" on the main menu
and then "CO2logger sensor".
In order to find the science experiments, choose "Experiments" on the main
menu of the NeuLog website, then choose "Physics", "Chemistry", "Biology" or
"Environmental Science".
Biology Experiments:
oPhotosynthesis (B-10)
oRespiration of Germinating Seeds (B-11)
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 its initial use. Please review the
“Sensor offset” guide at the beginning of this document for detailed instructions.
The CO2sensing element consists of a cation (Na+) solid electrolyte formed between
two electrodes together with a printed heater (RuO2) substrate.
The cathode (sensing element) consists of lithium carbonate and gold, while the
anode (counter electrode) is made of gold.
When the sensor is exposed to CO2gas, the following electrochemical reaction
occurs:
Cathodic reaction:
2Li++ CO2+ 1/2O2+ 2e- = Li2CO3
Anodic reaction:
2Na++ 1/2O2+ 2e- = Na2O
Overall chemical reaction:
Li2CO3+ 2Na+= Na2O + 2Li++ CO2
As a result of the electrochemical reaction, an electro-motive force (EMF) is generated
according to Nernst’s equation:
EMF = Ec - (R x T) / (2F) ln (P(CO2))
where
P(CO2) : Partial pressure of CO2,
Ec : Constant value R : Gas constant
T : Temperature (K) F : Faraday constant
By monitoring the electromotive force (EMF) generated between the two electrodes, it
is possible to measure CO2.

NEULOG CO2 LOGGER SENSOR GUIDE
Maintenance and storage:
Never submerge the NeuLog sensor’s plastic body and probe in any liquid.
Do not allow liquid into the NeuLog sensor’s plastic body and probe.
After use, wipe off all excess material, liquid or residue from the CO2probe's body.
Store in a box at room temperature out of direct sunlight.
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
V11042014