Edu-Logger 900-208 User manual

Edu-Logger Heart Rate and
Pulse Logger Sensor Guide
900-208

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Edu-Logger heart rate and pulse logger
sensor
900-208
The Edu-Logger pulse sensor can be used for any
science experiment which requires a human heart rate
or pulse such as in the fields of Biology, Health
Sciences, Physiology, Exercise Science,
Psychophysiology, etc.
The sensor comes pre-calibrated so you can start
experimentation right out of the box using this guide.
Heart rate can be measured in two ways with this
sensor: in beats per minute or in analog arbitrary
values to demonstrate the wave signal of a heartbeat
showing the blood volume in the finger or earlobe.
Hundreds of possible experiments that can be
performed with the 900-208 sensor are: physiological
experimentation, relationship between heart rate and
oxygen flow, blood volume, psychological
experiments which utilize heart rates, lie detection,
exercise experiments, VO2max experiments and
metabolism.
The heart rate and pulse sensor has two possible units
of measurement:
Beats Per Minute (BPM): The amount of
heart beats per minute
Arbitrary analog units (Arb): An arbitrary
unit meant to show wave functions.

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Probe usage:
The sensor consists of an infrared LED transmitter and
a matched infrared phototransistor receiver (light
detector).
For best results:
Wash hands before use.
Clip sensor to the little finger (pinky) or earlobe.
For better results, place the light detector (has
white transparent cover) side of the clip on the
pad of your finger, not the nail.
Remain as still as possible until testing is
complete.
Nail polish can skew the results.
Let signal stabilize before reading.
Quick start procedure:
PC or Mac Computer
Materials needed:
900-208 Heart Rate and Pulse Sensor
900-213 USB Module
USB to mini USB cable (included with the 900-
213 module)
Your heart rate and pulse 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 heart rate and
pulse 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.

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Procedure:
1. Install the Edu-Logger software.
2. Connect the 900-213 module to the PC or Mac.
3. Connect the heart rate and pulse 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 heart rate and pulse sensor logo appears
on the left side of the screen the probe has been
automatically identified and you can begin
experimentation.
6. If the heart rate and pulse sensor is not
automatically identified, click the “Search for
sensors” icon to find the sensor.
7. Click the “On-line experiment” button; this will
open a graph below.
8. Click on the “Module setup” button located on
the heart rate and pulse 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 heart rate and pulse 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:
900-208 Heart Rate and Pulse sensor
900-268 WiFi Module
900-215 Battery Module

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Your heart rate and pulse 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 heart rate and pulse 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
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.

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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 heart rate and
pulse sensor. The icon will display data in real
time.
14. Click on the “Module setup” button located on
the pulse sensor icon in the module window to
change the pulse probe settings if need be.
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 click “Run
experiment”.
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:
900-208 Heart Rate and Pulse Sensor
900-272 Graphic Display Module
900-215 Battery Module

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Procedure:
1. Connect the heart rate and pulse 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).
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:
900-208 Heart Rate and Pulse Sensor
900-215 Battery Module
Materials needed to configure your offline
experiment:
900-213 Module or 900-268 module or 900-272
Module
USB to mini USB cable (included with the 900-
213)
Procedure:
1. Connect the heart rate and pulse 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 heart rate and pulse sensor, a red
light will turn on for the duration of the
experiment.

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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 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.
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 900-208 heart rate and pulse sensor).
Restoring sensor’s factory default settings:
Procedure:
1. Connect the 900-213 to a PC, Mac, tablet, or
smart device.
2. Connect the heart rate and pulse 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 900-208 Heart Rate and Pulse Sensor
Guide (this document).
Fingertip/earlobe clip with IR receiver transmitter.
Sensor specifications
Beats per
minute
Arbitrary analog
units (wave
function)
Range and
operation modes
0 to 240
0-1023 Analog
values
ADC resolution
10 bit
Accuracy
1
Resolution
2
1
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).
Pre-calibrated sensing equipment.
Pulse sensing electrodes located in the probe clips
which are attached directly to the sensor’s plastic
body.
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 at any time
using software.
The pulse sensor’s probe consists of a
fingertip/earlobe clip which houses an infrared light
source and an infrared light detector on opposite sides.
The blood in the finger flows forward (oxygenated
with oxygen) and backward (deoxygenated with CO2).
The IR light absorbed by the deoxygenated blood and
the detected light intensity changes are according to
the heart pulses.
The light average intensity changes according to the
skin color, thickness, the probe pressure etc. The
sensor electronics offsets the average intensity,
amplifies and passes the pulses only to the internal
controller, which calculates the pulses' rate.