How To…
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When using an External Temperature sensor with any Labdisc model, plug the external sensor into the external sensor
micro USB port and then plug the Temperature Probe is plugged into the sensor. Since all Labdisc models come with an
External Temperature sensor built-in, the USB connected External Temperature sensor can be used to measure the
temperature of two substances simultaneously. The External Temperature sensor can be set to measure in either
Celsius or Fahrenheit. . To set this, use the configurations menu on the Labdisc or your computer.
CO2 Sensor
When using a CO
2
sensor with any Labdisc model, plug the external sensor into the external sensor micro USB port. The
first time the CO
2
is used, you will need to connect the Labdisc to its AC/DC adapter and allow the CO2 sensor to run for
24 hours, to reach calibration. After that, run the CO
2
sensor for at least an hour before starting your experiment.
The power consumption of the CO
2
sensor is rather high, so it is recommended that you have the Labdisc plugged into
the external power supply when using this sensor. Otherwise Labdisc battery will be empty in several hours and it will
stop working.
Heart Rate/Pulse
When using an External Heart Rate sensor with a GenSci, Enviro or Physio Labdisc, plug the external sensor into the
external sensor micro USB port and then plug the ear clip into the external sensor. Place the clip on the fleshy part of
the ear lobe, in a small “pinky” finger or on the webbing of skin between the thumb and index finger. With an External
Heart Rate sensor, the clip will measure the individual wave forms of each heartbeat, but will not show a graph line
indicating the overall heart rate. The pulse waveform will be measured in Volts (V).
Respiration
Prior to using the Respiration sensor with any Labdisc model, wash the silicon mouthpiece and dry well before installing
it on the Respiration probe. Then connect the Respiration sensor to the Micro USB socket. Turn on the Labdisc. If the
airflow through the Respiration sensor is within ±10% around zero, the Respiration sensor will auto calibrate and show a
zero reading. Have students insert the mouthpiece and begin breathing through the Respiration probe. Respiration is
measured in liters per minute (L/min).
Current
When using the External Current sensor with an Enviro or BioChem Labdisc, plug the external sensor into the external
sensor micro USB port and then plug the smaller end of the banana cables into the appropriate ports (red to red, black
to black). When using the Current sensor with a GenSci, Enviro or BioChem Labdisc, plug the external sensor into the
external sensor micro USB port and then plug the smaller end of the banana cables into the appropriate ports on the
external sensor. Wait for the Current sensor to auto calibrate and show a zero reading before beginning data collection.
Labdisc measures electrical current in Amperes or Amps (A).
Magnetic Field
When using the Magnetic Field sensor with any Labdisc model, plug the external sensor into the external sensor micro
USB port and use the probe’s switch to select the Earth’s magnetic field range. Use ±0.2 mT for measuring the Earth’s
magnetic field or any other very weak field. Use ±10 mT for measuring the magnetic field near wires carrying current,
inside coils and for constant magnetic fields. Magnetic fields are measures in millitesla (mT) units.
