Data Harvest 1207 Manuel utilisateur
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establishment
1207 – Wireless UV Sensor
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Table of contents
Introduction ...................................................................................................... 3
Pack Contents .................................................................................................... 5
Operational Overview ......................................................................................... 6
Connectivity ...................................................................................................... 8
Charging the Sensor ........................................................................................... 9
Firmware Updates ............................................................................................
10
Usage Information ............................................................................................
11
Practical Investigations .....................................................................................
12
Sensor Specifications ........................................................................................
14
Limited Warranty .............................................................................................
15
Compliance .....................................................................................................
16
Troubleshooting ...............................................................................................
17
Notices ............................................................................................................
18
Contact Information ..........................................................................................
19
PDF Translations ..............................................................................................
20
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Introduction
Thank you for purchasing the Smart Wireless UV Sensor. We pride ourselves on producing high quality
products that meet with the demands of the busy classroom environment. If you have any problems
using this sensor, please read this documentation in full before contacting the Data Harvest support
team.
The Wireless Ultraviolet sensor will measure the intensity of electromagnetic radiation in the ultraviolet
(UV) A and B bands. The Sensor uses a photodiode that is sensitive to UV in the range 221 nm to 358
nm. It has maximum spectral sensitivity at 280 nm. It has a field of view of approximately 40 degrees
either side of centre.
Overview
The Smart Wireless UV Sensor is USB and Bluetooth compatible. Using Bluetooth, a sensor can
connect to mobile devices, tablets, laptops and desktops.
The unit for ultraviolet irradiance is W/m2. Measurements can be recorded at three levels using either a
Slow or Fast response range.
·
The slow response ranges are 0 - 500 mW/m2, 0 - 5 W/m2 and 0 - 50 W/m2
·
The fast response ranges are 0 - 500 mW/m2, 0 - 5 W/m2 and 0 - 50 W/m2
The slow response is the most commonly used range and is suitable for use in most ultraviolet
investigations. The response has been smoothed to remove rapid fluctuations of UV.
The fast range is used to show mains frequency ultraviolet fluctuations. These variations in UV intensity
can be a source of interference for general work.
The range is shown in Devices in the EasySense2 software.
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The Ultraviolet Sensor measures UV light intensity as irradiance in W/m2. There are other ways that
UV intensity and exposure are measured. e.g.
1. The Ultraviolet Index (UVI), which is a measure of the solar ultraviolet (UV) intensity at the Earth's
surface relevant to the effect on human skin. The higher the UV index number, the greater the
penetrating power of the UV radiation and the more likely the damage to skin.
2.
The Effective UV Dose is directly related to the onset of sunburn and is an integral of the Effective
UV Intensity over the exposure time. The dose unit is called MED or Minimal Erythemal Dose
(minimum erythemal dosage units per hour).
Both the UVI and the MED/hour units take into account the erythemal response curve for reddening of
skin. The response curve follows the varying sensitivity of the average person to different wavelengths.
Skin sensitivity decreases rapidly over the UV-B range (approximately 100 times less sensitive every
20 nm) and decreases less rapidly over the UV-A range (approximately half as sensitive every 20 nm).
The Ultraviolet sensor does not have wavelength weighting corresponding to the erythemal action
spectrum so the readings cannot be converted to the UVI or MED/hour units.
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Operational Overview
The diagram below shows the specific parts of the sensor. Read further to explore the functionality of
each part of the sensor.
1.Sensor End Cap
2.Status Indicator
3.On/Off Switch
4.USB Port
5.Unique ID Number
Sensor End Cap (1)
Most Smart Wireless Sensors feature an end cap that is specific to the requirements of the device's
internal sensor. The sensor's end cap is the direct interface between the device’s internal sensor and
your experiment.
The Status Indicators (2)
The sensor features a single status indicator that changes colour and flashes. See the table below for
further information.
Status Light
Indicates
No light
Sensor is Off. Short press the On/Off switch
Blue flashing Sensor is On and Bluetooth advertising
White flashing Charging via USB mains charger or USB port,
Sensor is On and Bluetooth advertising
Red, Green, Blue
Flashing Charging via USB mains charger or USB port,
Sensor is Off
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Green flashing Communication with the EasySense2 app (via USB or
Bluetooth) has been established
Solid Green Fully charged
Orange flashing Recording data
Red flashing Battery is low
On/Off Switch (3)
The sensor's on/off switch allows you to turn the sensor on, off or perform a hard reset.
To switch the sensor off
·
Press and hold down the On/Off switch until the white light shows, then release.
·
If not communicating with the EasySense2 app, the sensor will turn off after a period of one hour of
inactivity.
Hard resetting the sensor
·
If necessary, attach the sensor to power.
·
Press and hold down the On/Off button for at least 8 seconds until the status LED gives a flash of
blue light, then release.
·
If the sensor fails to respond, contact Product Support at Data Harvest. Please provide details of:
oThe computer platform it is being used with and the EasySense2 app’s version number.
oA description of the problem being encountered.
USB Port (4)
Use to connect to a computer or a charging unit.
For specific USB or Bluetooth connectivity instructions, please see the 'Connectivity' section of this
documentation.
For instructions on charging your device, see the section on 'Charging the Sensor'.
Unique ID Number (5)
All Smart Wireless Sensors are labelled with a unique ID number. This number is used in the
EasySense2 app, so that you can identify each sensor when making a connection wirelessly.
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Connectivity
The sensor is both USB and Bluetooth compatible. Install the EasySense2 app, if it is not already on
your device. For details of how to operate the EasySense2 app, please refer to the EasySense2
documentation.
USB Connectivity
Quick Steps
1.Connect the sensor to the computer’s USB port using the USB cable supplied.
2.The computer will automatically detect a new device and depending on your operating system, will
install any applicable device drivers.
3.Start EasySense 2 app.
4.Within the EasySense2 app, the Devices icon will change to green to show that the sensor is
connected, and the status light on the sensor will also turn green.
5.Begin your practical investigations.
Bluetooth Connectivity
Using Bluetooth, the sensor can wirelessly connect to mobile devices such tablets and mobile phones,
as well as desktop or laptop computers, giving students the ability to run experiments independently
without being tethered to a device.
See the EasySense2 app user manual system requirements for further details.
Quick Notes on Bluetooth Connectivity
Only use with the EasySense2 app, you do not need to pair the device. If paired, the sensor will not be
available to the EasySense2 app.
Computers or devices will need to support Bluetooth Low Energy (BLE). For further information refer to
the instructions provided for the EasySense2 app.
Quick Steps
1.
Short press the on/off switch to turn the sensor on, blue LED will flash.
2.Open the EasySense2 app.
3.Select the Devices icon.
4.
Select your sensor from the list of available sensors to connect to the device. Your sensor is
identified by its unique ID in the list.
5.Click on connect at the side of your sensor in the list.
6.
The Devices icon will change to green and the status light on the sensor will flash green to indicate a
connection has been established.
7.Begin your practical investigations.
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Charging the Sensor
The Smart Wireless sensors are fitted with a rechargeable lithium-ion battery and can be charged via
the USB port. Use the supplied USB lead to connect the sensor either directly to a USB port on your
computer, a powered USB hub or a USB mains charger that outputs 5 V at 500 mA or more.
A full charge can take up to 4 hours.
Additional Information
Whenever the sensor is connected to the USB port on the computer or to a USB mains charger (output
5 V at 500 mA or more), it will automatically recharge the battery (LED status flashing white).
When connected to a computer, the computer should be turned on and not in sleep or standby mode,
as the battery may drain instead of charge.
The sensor will stay awake for 5 minutes when Bluetooth advertising (LED status flashing blue).
Lithium-ion batteries are ‘memory-free’ and prefer a partial rather than a full discharge. Constant partial
discharges with frequent recharges will not cause any harm. Frequent full discharges should be
avoided whenever possible. Ideally the sensor should be stored at about 40% or more charge.
The speed at which a lithium-ion battery will age is governed by both its storage temperature
(preferably less than 40 C) and state-of-charge.
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Firmware Updates
Occasionally Data Harvest may release updated firmware which will contain improvements or new
features.
Updates will take place when you connect your sensor to the EasySense2 app. You will be given the
option to decline an update.
Updates can be performed over USB or Bluetooth and will typically take less than one minute. Updating
firmware over USB will be quicker than Bluetooth.
Do not disconnect the sensor, or power off during the update.
If you have a wireless connection to the EasySense2 app, the sensor will have to be reconnected after
performing the update.
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