Edu-Logger 900-202 User manual

Edu-Logger Current
Logger Sensor Guide
900-202

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Edu-Logger current logger sensor
900-202
The Edu-Logger current sensor can be used for any
science experiment which utilizes current readings. It
is used in the fields of Physics, Electronics,
Chemistry, Biology, etc.
The sensor comes pre-calibrated so you can start
experimentation right out of the box using any of the
following guides.
Hundreds of possible experimental subjects that can
be performed with the 900-202 sensor are: Fuel cells,
battery chemistry, electrical parallel circuits, electrical
series circuits and electronics.
The current sensor's measurement units are:
Amperes (A): Amperes are the SI base unit
of electric current.

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Quick start procedure:
PC or Mac Computer
Materials needed:
900-202 Current Sensor
900-213 USB Module
USB to mini USB cable (which comes with the
900-213)
Your current sensor needs to be connected to a 900-
213 module. The 900-213 module then connects to a
computer via a USB to mini-USB cable. Please note
that you cannot plug the current sensor directly into
the computer.
Resident PC software and browser based application
can be downloaded for free at
www.edulab.com 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.
Procedure:
1. Install the Edu-Logger software.
2. Connect the 900-213 module to the PC or Mac.
3. Connect the current sensor to the 900-213
module (they directly plug together). Please note
no calibration is required for this sensor.
4. Open the Edu-Logger software.
5. Once a current sensor logo appears on the left
side of the screen, the probe has been
automatically identified and you can begin
experimentation.
6. If the current sensor is not automatically
identified, click the “Search for sensors” icon to
find the sensor.

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7. Click the “On-line experiment” button; this will
open a graph below.
8. Click on the “Module setup” button located on
the current sensor icon in the module window to
change the sensor's settings if need be.
9. Click on the experiment set up button to change
the experiment settings if need be (experiment
duration for example).
10. The current sensor will give a live reading in the
box to the left of the screen while plugged in.
11. To run an experiment and collect data, click “Run
experiment”.
12. To end data collection early, click “Stop
experiment”.
Tablet, smart phone device
Materials needed:
900-202 Current Sensor
900-268 WiFi module
900-215 Battery Module
Your current sensor needs to be connected to a 900-
268 module. The 900-268 module will create a closed
Edu-Logger WiFi network which will stream the Edu-
Logger data to the device of your choosing. Once your
device is wirelessly connected to the Edu-Logger
network you can run experiments and collect data
through a browser of your choosing.
Procedure:
1. Connect the current sensor directly to the left side
of a 900-268 module (no wires required).
2. Connect a 900-215 module to the right side of the
900-268 module.
3. Although not required, we recommend plugging
the 900-215 to an outlet using a USB to mini

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USB charger (such as a typical cell phone
charger). The 900-268 module will run for 15-75
minutes (depending on the sensor) without being
plugged in.
4. The 900-268 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 900-268 units with
the USB icon on the cover.
5. For further 900-268 instructions or the 900-268
quick start guide please visit:
www.edulab.com
6. The 900-268 indicator lights will flash; take no
action until the LED to the far left turns blue; this
can take up to one minute.
7. Take your tablet or smart phone, go to the WiFi
settings and select the Edu-Logger network
which matches the 900-268 Module ID found on
the back of the 900-268 device. (Edu-
LoggerXXXX for example).
8. Give your device about 20 seconds to connect to
the 900-268.
9. 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.
10. You will see a “Control mode” icon in the
browser, click on this icon.
11. 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.)
12. If the browser does not auto detect the sensor(s),
select “Search for sensors”.
13. Once the sensor is found, you will see an icon on
the left side of the screen for the current sensor.
The icon will display real time data.
14. Click on the “Module setup” button located on
the current sensor icon in the module window to
change the current probe settings if need be.

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15. Click on the experiment set up button to change
the experiment settings if need be (Experiment
duration for example).
16. To run an experiment and collect data, select
“On-Line” experiment, then select "Run".
17. If you have a newer generation 900-268 (with the
USB icon on the cover) this can be used as a 900-
213, meaning you can tether the probes directly
to the computer using the 900-268. 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 Edu-Logger viewer
Materials needed:
900-202 Current Sensor
900-272 Graphic Display Module
900-215 Battery Module
Procedure:
1. Connect the current sensor to the left side of the
viewer.
2. Connect the 900-215 module to the right side of
the viewer.
3. The 900-272 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. To run an experiment and collect data click the
run button (little green person).

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Off-line experiments
(Off-line experiments are when you do not have a
sensor connected directly to a computer, tablet,
smartphone, or Edu-Logger viewer).
Materials needed:
900-202 Current Sensor
900-215 Battery module
Materials needed to configure your offline
experiment:
900-213 Module, 900-268 module or 900-272
Viewing Module
USB to mini USB cable (included with the 900-
213 module)
Procedure:
1. Connect the current sensor directly to the left side
of a charged 900-215 module.
2. When ready to collect data, press the “Start/Stop”
button on the current sensor, a red light will turn
on for the duration of the experiment.
3. 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 the
experiment settings view the quick start
procedure section for your chosen device in this
document.)
4. 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).
5. Open the Edu-Logger software.
6. Click the “Off-line experiment” button.

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7. Click the “Load data from sensors” button.
8. Select which experimental data to upload. (5
experimental runs can be stored at one time on
the 900-202 current sensor)
Restoring sensor’s factory default settings:
Procedure:
1. Connect the 900-213 to a PC, Mac, tablet, or
smart device.
2. Connect the current sensor to a 900-213 module
(they directly plug together). Please note no
calibration is required for this sensor.
3. Open the Edu-Logger software.
4. Click the “Tools” icon.
5. Click the “Restore sensor’s factory defaults” on
the menu.
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.

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Included with sensor:
Edu-Logger 900-202 Current Sensor Guide (this
document).
Red (positive probe) and black (negative probe)
wires connected directly to the sensor's body.
4 mm red and black plugs for the positive and the
negative wires.
Sensor specifications
Range and operation
modes
±2.5 A
ADC resolution
13 bit
Accuracy
1%
Resolution
0.001 A
Max sample rate (S/sec)
3000
Sensor features:
Fully digital data.
Rugged plastic ergonomic case.
4 mm power and ground plugs for easy
connectivity
Push button switch for Start/Stop experiments in
off line mode.
LED indicator of experiment status (blinks while
collecting data).
Pre-calibrated sensing equipment.
Note: Edu-Logger products are intended for
educational use.

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Videos and experiment examples:
Videos, literature and other probes can be found
at www.edulab.com
Technical background:
The philosophy behind Edu-Logger’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 Edu-Logger 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.
The Edu-Logger current sensor houses a shunt resistor
and an amplifier. The circuit's current passes through
the shunt resistor and its electric potential is measured
using a very fast, high input impedance differential
operational amplifier with protected inputs. Using
ohm’s law (I = V/R) the current is calculated from the
known resistance and voltage values.
The shunt resistor is very high power (to protect it in
high current) and very small resistance (in order not to
affect the circuit conditions). The protection is up to 5
A.
Maintenance and storage:

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Never submerge the Edu-Logger plastic body in
any liquid.
Do not allow liquid into the current sensor’s body.
After using the probe, wipe off all excess material,
liquid or residue from the sensor.
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.

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Thank you for using Edu-Logger!
W: www.edulab.com
E: [email protected]m
T: [phone]
V10012013