PHYWE Cobra4 Wireless/USB-Link User manual

1
www.phywe.com, © All rights reserved 12601-09 and 12601-10 / 4716
Operating instructions
Cobra4 Wireless/USB-Link
(Cobra4 Wireless/USB-Link incl. accessories)
12601-09
(12601-10)
PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10
37079 Göttingen
Germany
Phone [phone]
Fax [phone]
E-mail [email protected]
Internet www.phywe.com
Fig. 1: Cobra4 Wireless/USB-Link
TABLE OF CONTENTS
1SAFETY PRECAUTIONS
2PURPOSE AND CHARACTERISTICS
3FUNCTIONAL AND OPERATING ELEMENTS
3.1 Top side elements
3.2 Sensor interface
3.3 USB interface
3.4 Device charging
3.5 Battery replacement
4NOTES ON OPERATION
5HANDLING
5.1 Putting into operation
5.2 Starting the instrument into WiFi mode
5.3 Configuration
5.4 Reset the network settings
5.5 Starting the instrument into USB mode
6TECHNICAL DATA
7PARTS SUPPLIED
8SOFTWARE
9ACCESSORIES
10 WASTE DISPOSAL
11 LICENSE NOTICE
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 Cobra4 Wireless/USB-Link from dust, moisture
and vapours. Use a slightly moist lint-free cloth to clean
the instrument. Do not use aggressive cleaning agents or
solvents.
Only use the experimental set-up for the purpose for
which it is intended.
Open the instrument for battery replacement, only.
Before replacing the battery, disconnect the instrument
from other devices (e.g. PC, sensors).
Pay attention to the correct polarity when replacing the
battery!
The present-day state of software development makes it
impossible to guarantee that a product is free of faults.
PHYWE Systeme GmbH & Co. KG therefore does not
take on any liability for damages that occur during the
installation or the use of the instrument.
2 PURPOSE AND CHARACTERISTICS
Cobra4 Wireless/USB-Link enables wireless communication
between a PC, tablet or smartphone, and a connected Co-
bra4 Sensor-Unit.
Attention!

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The voltage supply of the Wireless/USB-Link is provided by
an integrated rechargeable Li-ion battery. It has to be consid-
ered that the lifetime of a Li-ion battery is limited; each
charge cycle reduces the lifetime. Therefore, the battery can
be replaced. However, the battery should not be replaced
until the battery life without connected sensor falls below
2 hours.
3 FUNCTIONAL AND OPERATING ELEMENTS
3.1 Top side elements
Cobra4 Wireless/USB-Link is equipped with various elements
for status indication, display of the sensor identification, and
for operation of the instrument, which are described below
(Fig. 2):
1 On and off switch
Pressing the button switches the instrument either on or off.
The instrument switches off self-controlled to save the battery
life: Switch-off 10 min after the last press of a button or end-
ing the used software (long-term measurements are not
aborted).
2 LED Power/Charge
Turns green when the instrument is switched on.
Blinks if the battery has to be charged.
Turns orange, when the battery is charged via the USB
socket.
3 Record button
Pressing the button initiates a measurement and pressing
again stops the measurement. An active measurement is in-
dicated by the LED above. Pressing and holding the button
during switch-on causes the device to operate in USB mode
(see chapter 5.5).
4 LED Identification (ID)
Turns green for about 4 s after connecting a sensor and
indicates that it is correctly recognised.
Blinks orange for about 4 s if the user initiates the sensor
identification via software (Assignment to an experiment).
Blinks green in USB mode (see chapter 5.5).
5 LED Network quality
Turns green at good network coverage.
Turns green and orange at medium network coverage.
Turns orange at bad network coverage.
Alternating blinking (orange/green) indicates a network
calibration.
3.2 Sensor interface
The interface for fitting the instrument to the Cobra4 Sensor-
Unit is at the front of it, whereby a mechanically secure click
connection is ensured by the mushroom-shaped click-on
connector and a hole (Fig. 3).
Fig. 3: Interface for connection of a Cobra4 Sensor-Unit.
Mushroom-shaped click-on connector for latching in the
hole of the respective sensor.
Cobra4 Wireless/USB-Link communicates exclusively
with instruments from the Cobra4 product line.
3.3 USB interface
The instrument is charged via the USB interface (see chap-
ter 3.4). It can also be used as connection to a computer for
data logging (comparable to Cobra4 USB-Link). See chap-
ter 5.5.
3.4 Device charging
The Li-ion battery is charged via the USB interface. Using an
external power supply (art. no. 07932-99), the charging of a
completely discharged battery takes about 4 hours. The dura-
tion may vary when using the USB port of a PC. While charg-
ing, the device can still be operated.
Attention!
Continuously pressing the button for longer
than 5 s restores the factory default settings.
See chapter 5.4.





Fig. 2: Functional elements


Carefully read the respective operating instruc-
tions completely before operating a Sensor-Unit.
This is necessary to avoid damage to it, as well
as for user-safety.

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3.5 Battery replacement
If the maximum capacity of the battery has considerably de-
creased, it is possible to replace the battery. Please note that
the warranty does not cover defects caused by the battery
replacement. It also is possible to send the Wireless/USB-
Link to the PHYWE repair department, which will exchange
the battery for a new one.
Fig. 4: Removing the end cap
Step 1: Remove the end cap of the instrument by pressing
the release buttons with a pen or another pointed object
(Fig. 4).
Attention: Open the left side first, followed by the right side,
to prevent damage of the connection cord on the left-hand
side of the battery.
Fig. 5: (Un-) plugging the connector
Step 2: Release the connector of the battery from the circuit
board (Fig. 5). Remove the worn-out battery. Insert the new
battery in the holder.
Fig. 6: Backside view with plugged battery connector
Step 3: Plug the connector onto the circuit board.
Attention: Check, that the connection cord lays above the
USB socket (Fig. 6); otherwise the end cap cannot be closed.
Furthermore, the antenna cable must not be pinched.
4 NOTES ON OPERATION
The Cobra4 Wireless/USB-Link fulfils all of the technical re-
quirements that are compiled in current EC guidelines. The
characteristics of this product qualify it for the CE mark and
the FCC mark.
This instrument is only to be put into operation under special-
ist supervision in a controlled electromagnetic environment in
research, educational and training facilities (schools, universi-
ties, institutes and laboratories).
This means that in such an environment, no mobile phones
etc. are to be used in the immediate vicinity. The individual
connecting leads are each not to be longer than 2 m. The in-
strument can be so influenced by electrostatic charges and
other electromagnetic phenomena (HF, bursts, indirect light-
ning discharges) that it no longer works within the given
specifications.
If the instrument should not respond anymore, restart it by
pressing and holding the on and off switch for longer than 3 s.
If necessary, restart the measurement software (PC or app).
An ideal wireless communication between the Cobra4 Wire-
less Link 2 and the data logging device (PC, tablet,
smartphone) can only be ensured by “visual contact” and on
short distance (max. 50 m). Set the experiments up accord-
ingly.
5 HANDLING
This section describes how to put Cobra4 Wireless/USB-Link
into operation and provides an overview of how to handle it.
To avoid failure or improper operation, please read carefully
through this section.
5.1 Putting into operation
Be sure that the battery of the instrument is fully charged.
Use an end device (PC, notebook, tablet or smartphone) with
WiFi enabled.
5.2 Starting the instrument into WiFi mode
Before using the instrument, connect the desired Cobra4
Sensor-Unit to it. Switch on the device. If the instrument is
started for the first time, it will operate in “Excursion” mode
(Access Point Mode). Then, it is visible as “WirelessLink2-xxxxx”
for every end device.
After every restart of the instrument, the network settings will
be restored. This means that the device will automatically re-
connect to the previously connected network. If this network
is not available, the device will switch to “Excursion” mode.
5.3 Configuration
The following procedure explains how to change the network
mode of the Wireless/USB-Link. Be sure that WiFi is enabled
on the end device. Connect to the network “Wireless-
Link2-xxxxx”(as shown in Fig. 7 or similar).
xxxxx corresponds to the last 5 digits of the Mac address that
is denoted on the backside label of the Wireless/USB-Link.
Charging the device while operating a sensor
may cause the battery not to charge, if the
power consumption of the used sensor ex-
ceeds the charging current.



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Fig. 7: WiFi settings on a tablet
Start the browser on the end device. Type the IP address
“192.168.1.1”or “WirelessLink2-xxxxx.local”(without quota-
tion marks) into the address bar (Fig. 8).
Fig. 8: Browser on a tablet
Now you can select the operation mode of the Wireless/USB-
Link:
Establish individual network.
Choose Excursion (Access Point mode). In this mode, the
Wireless/USB-Link establishes its own WiFi network, to
which an end device can be directly connected. If the end
device was connected to a different WiFi network before, this
network cannot be accessed during the connection to the
Wireless/USB-Link.
Embed in an existing WiFi network.
Select Classroom (Infrastructure mode). Now you have to
enter the name of the existing WiFi network (SSID), to which
the Wireless/USB-Link should be connected. Enter the corre-
sponding password, as well. If necessary, ask your system
administrator for the password.
The Wireless/USB-Link will disconnect from the end device
and connect to the entered network. In this mode, every de-
vice that is connected to this network can access the Wire-
less/USB-Link.
By clicking the “Save” button, the settings will be applied and
the device will connect to the existing network.
5.4 Reset the network settings
To reset the instrument to factory default settings (“Excur-
sion”), press and hold the record button for at least 5 s.
Flashing of all LEDs will indicate the execution of the system
reset. Afterwards, the device restarts automatically to “Excur-
sion” mode.
5.5 Starting the instrument into USB mode
Press and hold the record button during the switch-on pro-
cedure until the identification LED starts to blink. Then the
Wireless/USB-Link is set to USB mode and will not respond
via WiFi. In USB mode, the device behaves just like a Cobra4
USB-Link (article no. 12610-00). To switch back to WiFi
mode, the Wireless/USB-Link has to be switched off and on
again.
6 TECHNICAL DATA
typical for 25 °C:
Operating temperature range 5–40 °C
Relative humidity < 80 %
Interface module for wireless-based transmission of sensor
measured values at a carrier frequency of 2.4 GHz.
Voltage supply Li-ion battery 1950 mAh
Power consumption < 400 mA
Wireless WiFi, 2.4 GHz, 54 Mbps
Output performance, wireless < 10 mW
Data rate, max. (burst) 125 000 s−1
Data rate (online) 2 000 s−1
Range, without obstacles 50 m
Dimensions (L x B x H) 125 x 65 x 35 mm
Weight 200 g
Battery life up to 5 h
7 PARTS SUPPLIED
Cobra4 Wireless/USB-Link is supplied with the following
components:
Operating instructions
Li-ion battery
In addition, the set “Cobra4 Wireless/USB-Link incl. accesso-
ries” (Art. no. 12601-10) contains:
USB cable
measure SoftwareDVD
for driver installation, and operating software
in USB mode (for PC) 14501-00
8 SOFTWARE
For operation, an end device with installed measurement
software is required. For use with a PC in USB mode, PHY-
WE provides the following software:
Software measure Cobra4, multi-user license 14550-61
For smartphones and tablets in WiFi mode, operating on iOS
or Android platforms, the software “PHYWE measure”can be
obtained from the respective store for free:
iOS
Android

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9 ACCESSORIES
USB power supply for Cobra4 devices 07932-99
Replacement battery for Cobra4 Mobile-
Link 2 and Wireless/USB-Link 07932-01
Cobra4 Wireless/USB-Link can be used with all instruments
from the Cobra4 product line:
Cobra4 Sensor-Unit Hall Effect 11801-01
Cobra4 Sensor-Unit Chemistry:
pH and 2x Temperature NiCr–Ni 12630-00
Cobra4 Sensor-Unit pH, BNC connector 12631-00
Cobra4 Sensor-Unit Conductivity /
Temperature (Pt1000) 12632-00
Cobra4 Sensor-Unit Conductivity with stain-
less steel electrodes 12633-00
Cobra4 Sensor-Unit Colorimeter 12634-00
Cobra4 Sensor-Unit Drop Counter 12636-00
Cobra4 Sensor-Unit Thermodynamics: Pres-
sure and 2x Temperature NiCr–Ni 12638-01
Cobra4 Sensor-Unit Temperature,
Semiconductor −20…+110 °C 12640-00
Cobra4 Sensor-Unit 2x Temperature, NiCr–Ni 12641-00
Cobra4 Sensor-Unit Force ±40 N 12643-00
Cobra4 Sensor-Unit Electricity:
Current / Voltage 12644-00
Cobra4 Sensor-Unit Pressure 12647-00
Cobra4 Sensor-Unit Motion 12649-00
Cobra4 Sensor-Unit 3D-Acceleration 12650-01
Cobra4 Sensor-Unit Timer / Counter 12651-00
Cobra4 Sensor-Unit Tesla 12652-00
Cobra4 Sensor-Unit Energy 12656-00
Cobra4 Sensor-Unit Forceplate 12661-00
Cobra4 Sensor-Unit Radioactivity 12665-00
Cobra4 Sensor-Unit Sound Level 12669-00
Cobra4 Sensor-Unit Weather: air pressure,
humidity, temperature, light intensity, elevation 12670-00
Cobra4 Sensor-Unit CO212671-00
Cobra4 Sensor-Unit Pulse, heart rate 12672-00
Cobra4 Sensor-Unit Electrophysiology:
ECG, EMG, EOG 12673-00
Cobra4 Sensor-Unit Spirometry 12675-00
Cobra4 Sensor-Unit Oxygen 12676-00
Cobra4 Sensor-Unit Skin Resistance 12677-00
The Cobra4 instrument line supports the transmission of
measured values from the Sensor-Units to a PC via further
interface modules:
For USB transmission, only:
Cobra4 USB-Link 2 12610-10
For USB transmission, additionally usable as handheld device:
Cobra4 Mobile-Link 2 12620-10
For fixing Cobra4 Wireless/USB-Link in position with a stand
rod in experimental set-ups, we recommend the following ac-
cessory:
Support for Cobra4 with stand rod 12680-00
For table-top set-ups with Cobra4 Wireless/USB-Link, we
recommend as accessory:
Holder for Cobra4 12681-00
10 WASTE DISPOSAL
The packaging mainly consists of environmentally-friendly
materials that should be returned to the local recycling sta-
tions.
PHYWE Systeme GmbH & Co. KG
Customer Service
Robert-Bosch-Breite 10
37079 Göttingen
Germany
Telephone [phone]
Fax [phone]
11 LICENSE NOTICE
This product contains software elements that were developed
by third parties, and/or software, that is liable to the GNU
General Public License (GPU) and/or the GNU Lesser Gen-
eral Public License (LGPL).
The GPL and/or LGPL code that is used in this product is
provided WITHOUT ANY WARRANTY and is liable to the
copyright of one or several authors. For further details, see
the GPL and/or LGPL code of this product and the usage
agreement of GL and LGPL.
The full license texts can be found on the enclosed DVD or at
www.phywe.com/12601-09 for reading. The source code of
the software elements can be obtained on request from
PHYWE Systeme GmbH & Co. KG within 3 years, starting on
the date of purchase.
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.