PHYWE Cobra SMARTsense CO2 User manual

1
www.phywe.com, © All rights reserved 12932-01 / 0720
Operating
instructions
Cobra SMARTsense CO2
12932-01
PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10
D–37079 Göttingen
Telefon [phone]
Fax [phone]
E-mail [email protected]
Internet www.phywe.com
The unit complies
with the applicable
EC-guidelines
Fig. 1: 12932-01 Cobra SMARTsense CO2
TABLE OF CONTENTS
1SAFETY PRECAUTIONS
2PURPOSE AND CHARACTERISTICS
3FUNCTIONAL AND OPERATING ELEMENTS
4NOTES ON OPERATION
5HANDLING
6TECHNICAL DATA
7SCOPE OF DELIVERY
8ACCESSORIES
9 CONFORMITY
10 DISPOSAL
1 SAFETY PRECAUTIONS
Carefully read these operating instructions completely
before operating this instrument. This is necessary to
avoid damage to it, as well as for user-safety.
Only use the instrument for the purpose for which it was
designed.
Only use the instrument in dry rooms in which there is no
risk of explosion.
Protect the instrument from dust, moisture and vapours.
Use a slightly moist lint-free cloth to clean the instrument.
Do not use aggressive cleaning agents or solvents.
Take care that no liquid penetrates in through the hous-
ing openings, as such penetration would result in dam-
age to Sensor.
Do not open the unit.
2 PURPOSE AND CHARACTERISTICS
The sensor is used for measuring the concentration of gase-
ous carbon dioxide and for transferring the values to a termi-
nal device, e.g. a tablet computer, smartphone, etc., via Blue-
tooth or USB
Caution!

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3 FUNCTIONAL AND OPERATING ELEMENTS
3.1 Operating elements
The sensor has an on-button and two LEDs for indicating the
Bluetooth and battery charge status.
On-button
To switch the sensor on and off in Bluetooth mode, the power
button must be pressed for longer than 3s. If the sensor is to
be connected via USB, it is not necessary to press the power
button.
Bluetooth-LED
Flashing red every 2 seconds
Not connected
Flashing green every 2 seconds
Connected to the ter-
minal device
Flashing green every 4 seconds
Running measurement
Battery charge LED
Flashing red every 2 seconds
Low battery
Illuminated red
Active charging process
Illuminated red
Charging process
completed
3.2 USB port
The battery, which is permanently installed in the sensor, is
charged via the type C USB port. Furthermore, communica-
tion with a computer takes place via this interface.
4 NOTES ON OPERATION
This device fulfils all of the technical requirements that are
compiled in current EC guidelines. The characteristics of this
product qualify it for the CE mark.
The individual connecting leads are each not to be longer
than 2 m.
The instrument can be so influenced by electrostatic charges
and other electromagnetic phenomena (HF, bursts, indirect
lightning discharges) that it no longer works within the given
specifications. Carry out the following measures to reduce or
eliminate the effect of such disturbance: Ensure potential
equalization at the PC (especially with Laptops). Use screen-
ing. Do not operate high frequency emitters (e.g. radio
equipment or mobile radiotelephones) in the immediate vicini-
ty. When a total failure of the instrument occurs, unplug it and
plug it back in again for a reset.
5 HANDLING
This section describes the start-up of the sensor and the re-
cording of measurement data. Please read this section thor-
oughly in order to avoid failures or operating errors.
5.1 Charging process
Use a USB-C cable to connect the sensor to a computer or
USB charger (not included).
During the charging process, the battery charge LED lights
up red. When the charging process is complete, the battery
charge LED lights up green. The charging time for a com-
pletely discharged battery is 3 hours maximum.
Disconnect the charger at the latest four hours af-
ter the completion of the charging process. Other-
wise, the service life of the battery may be nega-
tively affected.
5.2 Start-up
Switch on the sensor by pressing the power button for more
than 3s. Now the Bluetooth LED flashes red. Start the soft-
ware and select the sensor.
If the sensor is to be used via the USB interface, it does not
need to be switched on. The sensor is connected directly to
the end device using the supplied USB cable.
There is a 9-digit code on
the back of the sensor
(Fig.2). The last 4 digits
of the code are displayed
as the sensor name in
the software (Fig.3). This
enables the precise as-
signment of the sensors
within the software.
Fig. 2
Fig. 3
Selection of the sensor via the Bluetooth interface
Make sure that the Bluetooth interface is activated on the
terminal device (PC/Tablet/Smartphone) and that the soft-
ware is allowed to access the interface.
After the sensor has been selected in the software, the LED
flashes green to indicate that the connection has been estab-
lished correctly. After the sensor has been coupled with the
software, the sensor is no longer visible to other users in the
software, and therefore can no longer be selected.
If the sensor is switched on and not connected, it switches off
automatically after 5 minutes.
Selection of the sensor via the USB interface
For this purpose the sensor must be plugged into the USB
port of the end device. It is not necessary to switch on the
sensor. The sensor is automatically recognized and dis-
played. It can be selected and connected directly.
5.3 Recording of measurement data
Measuring principle:
The tip of the measuring tube is equipped with an infrared
LED. The radiation of this LED is registered by an infrared
sensor at the end of the measuring tube (at the front of the
sensor). The gaseous CO2diffuses through the opening in
the measuring tube from the atmosphere into the measuring
tube. Ensure that the openings are not covered or blocked.
The more CO2is present in the measuring tube, the more the
infrared radiation will be absorbed, which is the basis for cal-
culating the CO2concentration values in the sensor.
Measurement:
To measure the concentration of gaseous CO2, the sensor
can be completely brought into the measurement environ-
ment (e.g. a classroom, terrarium, etc.) or it can be fastened
to a vessel (e.g. an Erlenmeyer flask) with the aid of the rub-

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ber stopper. Due to the measuring principle and the mechan-
ical design of the system (flow through the measuring tube),
a response time of the system of approx. 5 minutes is to be
expected. It is not until after this delay that reliable measure-
ment values can be read off. In addition, it must be taken into
account that the measurement sensor (infrared sensor) re-
quires a warm-up phase of 3 minutes.
The exchange of the air inside the measuring tube with the
environment can be promoted by moving the sensor.
5.4 Calibration
Lay the sensor down outside in fresh air for approx. 30
minutes (not in direct sunlight). In this situation, the CO2con-
centration is approx. 400 ppm. Then, press the ON button for
more than 7 seconds. The sensor will be automatically cali-
brated based on the value of 400 ppm.
6 TECHNICAL DATA
Operating temperature range: 5 - 40°C
Rel. humidity < 80%
Measuring range
Resolution
Accuracy:
0…5000 ppm
5000…50000 ppm
50000…100000 ppm
0…100000ppm
2 ppm
3 %
4 %
6 %
Max. date rate
Battery capacitiy
Max. wireless range (open field)
1 Hz
1000 mAh
30 m
Dimensions (length x width x height)
172 x 40 x 28 mm
Weight
77 g
7 SCOPE OF DELIVERY
The extent of delivery is as follows
Cobra SMARTsense CO212932-01
USB connecting cable type C 07935-00
Operating instructions
8 ACCESSORIES
The following accessories are available:
USB connecting cable type C 07935-00
USB-charger 07934-99
USB-Bluetooth-Adapter 07936-00
Software measureLAB 14580-61
Erlenmeyer flask, 250 ml 46142-00
Rubber plug with hole 12932-10
Free measureApp available from supplier portals
iOS
Android
9 CONFORMITY
10 DISPOSAL
The packaging mainly consists of environmentally-friendly
materials that should be returned to the local recycling sta-
tions.
PHYWE Systeme GmbH & Co. KG
Abteilung Kundendienst
Robert-Bosch-Breite 10
D–37079 Göttingen
Telefon [phone]
Fax [phone]
Do not dispose of this product with normal
household waste. If this unit needs to be
disposed of, please return it to the address
that is stated below for proper disposal
PHYWE Systeme GmbH & Co.KG hereby
declares that the radio system type 12932-
01 complies with the 2014/53/EU directive.
The complete text of the EC Declaration of
Conformity is available at the following In-
ternet address:
www.phywe.com/en/ec-declaration