Vernier LabQuest 2 - Manual (Page 11)

LabQuest 2 Hardware
7
Internal Sensors
LabQuest also has several built-in sensors, including a
GPS, microphone, three-axis accelerometer,
temperature sensor, and relative light sensor.
To enable internal sensors within LabQuest App,
choose Sensor Setup from the Sensors menu. Within the
Sensor Setup dialog box, select a check box to enable
the associated sensor. Then tap OK to return to the
LabQuest App Meter screen.
•
GPS – The internal GPS collects latitude, longitude, and altitude readings, and may be
used with other sensors. You can choose units of decimal degrees, degree minutes, or
UTM. Note: It may take up to 15 minutes to acquire an initial signal outdoors. We do not
recommend using GPS indoors.
•
Accelerometers – The 3-axis accelerometer measures accelerations up to
±2 g in the x-,
y-, and z-axis directions. The sensor is located 72 mm from the docking connector and
32 mm from the digital port side of the plastic case.
•
Temperature – The internal temperature sensor
monitors ambient temperature. The sensor is
located between CH2 and CH3, in front of the
BTA connectors.
•
Light Sensor – The internal light sensor is located on the front of LabQuest, to the left of
the screen. This light sensor combines one exposed photodiode (CH0), which is
responsive to both visible and infrared light, and one filtered photodiode (CH1), which is
responsive primarily to infrared light. The CH1 reading is subtracted from the CH0
reading and then converted to a value in lux that represents illuminance (ambient light
level) to approximate the human eye response. The spectral response range for this sensor
is approximately 400–800 nm.