How To…
8
UV Sensor
Be sure that the outer ring of the Labdisc is rotated to a fully open position to ensure that the sensor is exposed to the
environment. Point the UV sensor directly at the light source for which you wish to measure UV rays. The Ultraviolet
sensor measures UV levels with the UVI or Ultraviolet Index. The UV Index is designed as a linear scale, directly
proportional to the intensity of UV radiation that causes sunburn. An index of 0 corresponds to zero UV irradiation,
while an index of 10 corresponds roughly to midday summer sun with a clear sky. Measurements greater than 11 are
quite common in summer at low latitudes, high altitudes, or in areas with above-average ozone layer depletion.
Voltage
(Physio or External Sensor on any Labdisc)
Rotate the outer ring of the Labdisc to expose the Voltage Sensor connection port and plug the smaller end of the
banana cables into the appropriate ports (red to red, black to black). When using the Voltage 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 Voltage sensor to auto
calibrate and show a zero reading before beginning data collection. Labdisc measures Voltage in volts. The volt (V) is
the unit of measurement for the electric potential difference between two points.
Available External Sensors
Dymo Wireless Force & Accelerometer
This sensor allows for wired (via USB) or wireless (via Bluetooth) communication of data relating to force and
acceleration. If using Bluetooth communication (recommended for all motion/acceleration activities), you will need to
pair the Dymo with your computer the first time you use the sensor. To do this, turn on the Dymo using the on/off
button. Press and hold the Bluetooth button for 3 seconds to enable Bluetooth communication. You will see the blue
light flash 3x. Then right click on the Bluetooth icon
in the lower right corner of the Globilab window and click
on “Find More Labdiscs and sensors.” When the “add a device” window pops up, select your Dymo using the last 4 digits
from the sticker on the back of the Dymo to identify it. Use 1234 as the pairing code and click “next.” Then right click
the Bluetooth icon again and select the Dymo that you just paired.
To use the Dymo, press the on/off key. The LED will flash green and the device will be on. To start data collection, push
the on/off button again (a 3 second hold on the on/off button will turn the Dymo off). When you are finished your data
logging, push the on/off button again to stop logging. You can also use the start/stop button in the Globilab software to
start/stop your data logging.
If you wish to Zero Force Offset, turn the Dymo off. Remove any weights from the sensor. Disconnect it from the
Globilab software. Turn the sensor on again and press both the Bluetooth *and* the On/Off keys simultaneously until
the Bluetooth LED is a constant blue. A flashing red light indicates that the battery is low (if unplugged) or charging (if
plugged in). Acceleration is measured in meters/second
2
. Force is measured in Newtons (N). A Newton is unit of force
needed to move a 1 Kg mass at the rate of 1 m/sec
2
. Since
F=ma
, 1N=1 kg*m/s
2
.
Voltage Sensor
When using an external voltage 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 (red/red,
black/black). When using the Voltage 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 Voltage sensor to auto calibrate and show a zero reading before beginning data collection.
Voltage is measured in volts (V), the unit of measurement for the electric potential difference between two points
External Temperature Sensor
