Data Harvest 1180 Manuale utente
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establishment
1180 - Wireless Carbon Dioxide Sensor
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Table of contents
Introduction ...................................................................................................... 3
Pack Contents .................................................................................................... 4
Operational Overview ......................................................................................... 5
Connectivity ...................................................................................................... 7
Charging the Sensor ........................................................................................... 8
Calibration ......................................................................................................... 9
Firmware Updates .............................................................................................. 9
Usage Information ............................................................................................
10
Practical Investigations .....................................................................................
11
Sensor Specifications ........................................................................................
13
Limited Warranty .............................................................................................
14
Compliance .....................................................................................................
15
Troubleshooting ...............................................................................................
16
Notices ............................................................................................................
17
Contact Information ..........................................................................................
18
PDF Translations ..............................................................................................
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Introduction
Thank you for purchasing the Smart Wireless Carbon Dioxide 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.
Overview
The Wireless Smart Carbon Dioxide sensor uses a pulsed infrared light source to measure the amount
of carbon dioxide. Carbon dioxide is a strong absorber of infrared, so a reduction of the infrared from
source to detector will be proportional to the amount of carbon dioxide present.
The sensor is only for the measurement of carbon dioxide in dry gas environments.
The sensor is temperature compensated and can operate in high humidity environments.
The Wireless Smart Carbon Dioxide sensor also has temperature and pressure sensors built in.
This sensor can be used to investigate the amount of CO2 in the air and how it changes over time. A
Nalgene bottle, into which it fits, is included to create a contained environment for study of plants and
small animals. (NB for gaseous use only. Not for use in water).
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Pack Contents
This product is supplied with the following items:
·
1 x Wireless Carbon Dioxide
·
1 x USB Connecting Lead
·
1 x Nalgene Bottle
Additional Accessories
To get the most from your Smart Wireless Carbon Dioxide Sensor, the following items should be
considered:
·
Wireless Oxygen In Air Sensor
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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 On and Bluetooth advertising
White flashing Charging via USB mains charger or USB port
Green flashing Communication with the EasySense2 app (via USB or
Bluetooth) has been established
Orange flashing Recording data
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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 60 mins 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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Calibration
The sensor can be calibrated in the EasySense2 App.
Leave the sensor in a fresh air environment for approximately 20 minutes to calibrate the sensor to
400ppm CO2.
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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Usage Information
The Carbon Dioxide Sensor is only for measurement of CO2 in dry gasses.
Between readings, gently wave the sensor through air (if possible) to refresh the air in the sensing
section of the sensor.
Carbon dioxide is denser than the other components of air. It will sink to the bottom of any collection
vessels. Absolute measurement values should take account of this. You can see the effect of this by
pouring CO2 into a bucket and slowly lowering the sensor into the bucket. A dramatic increase in
recorded CO2 will take place as the sensor reaches the bottom half of the bucket.
The sensing snout of the sensor is lightly tapered to allow it to be gently pushed into an appropriate
sized hole. The opening of the included Nalgene bottle will demonstrate this.
The included Nalgene bottle has a rubber ringed hole to one side that is designed to create an airtight
seal around the oxygen and carbon dioxide sensor. It is recommended that in designing the practical,
you ensure the CO2 sensor is at the bottom of the collecting vessel.
There is a disparity between the range of the CO2 sensor and the Oxygen sensor, CO2 is present in
significantly lower concentrations than O2, you may find that attempts to measure both CO2 and O2
changes around plants will not be successful, this is not a fault of the accuracy of the sensors, it is a
consequence of the relative concentrations. We would recommend that for photosynthesis studies
measure the change in CO2 only for good data.
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