Data Harvest EASYSENSE Vu+, Reference Manual

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EASY SENSE Vu+ Reference Manual DO255 (3)
5

Data Harvest Group Ltd.
Sensors
The built-in sensors
Vu+ is a fully self-contained portable data logger with 3 built-in sensors
– Sound, Light and
Temperature. It is supplied with the default range for its sensors selected (shown in the following table
in bold).
Vu+ will automatically display values using the range selected. The built-in sensors can be hidden from
the display
– see
page 16 .
Sound sensor
This sensor has one range, 40 to 110 dBA (decibels), which is used to measure sound pressure level
(loudness). It is responsive to both single sounds (such as a whistle or handclap) and continuous
background noise (such as passing traffic, classroom noise).
Light level sensor
This sensor has 3 ranges to choose from.

Indoor 1 k lx . This lower range is suitable for recording at indoor light levels and so is normally
selected for use in the classroom.

In/Out 10 k lx . This medium range is suitable for recording bright light levels indoors or low light
levels outdoors.

Outdoor 100 k lx . This larger range is suitable for recording light level outdoors in sunlight, which
makes it ideal for environmental monitoring.
Temperature sensor
This sensor has six ranges to choose from, three Celsius and three Fahrenheit. The range selected
will also be applied to plug-in temperature sensors.
Notes:

All Temperature sensors, built-in or plug-in will use the same range.

The Vu+ logger can only be used in an environment of 0 to 40

C, 0 to 95%RH (non-condensing).

The speed of reaction of the built-in temperature sensor to any change in external temperature
will be delayed by Vu+
’s plastic case.
Built-in Sensors Ranges
Sound 40 to 110 dBA
Light level
Indoor 1 k lx (0 to 1,000 lx)
In/Out 10 k lx (0 to 10,000 lx)
Outdoor 100 k lx (0 to 100,000 lx)
Temperature
Celsius 0 to 50°C
Celsius 0 to 110°C
Celsius -30 to 110°C
Fahrenheit 0 to 120˚F
Fahrenheit 0 to 232˚F
Fahrenheit -
22 to 230˚F