PHYWE Cobra4 Mobile-Link 2 Operating Instructions Manual

1

Operating instructions

Fig. 1: Cobra4 Mobile-Link 2

Cobra4 Mobile-Link 2

(Cobra4 Mobile-Link 2 incl. accessories)

12620-09

(12620-10)

PHYWE Systeme GmbH & Co. KG

Robert-Bosch-Breite 10

37079 Göttingen

Germany

Phone +49 (0) 551 604-0

Fax +49 (0) 551 604-107

E-mail [email protected]

Internet www.phywe.com

The unit complies

with the applicable

EC-guidelines

TABLE OF CONTENTS

1 SAFETY PRECAUTIONS

2 PURPOSE AND CHARACTERISTICS

3 FUNCTIONAL AND OPERATING ELEMENTS

3.1 Operating elements on the top

3.2 Sensor interface

3.3 Recording function of the memory card

4 NOTES ON OPERATION

5 MOBILE HANDLING

5.1 Start-up

5.2 Starting the unit

5.3 Measurement data recording process

5.4.1 Sensor/Range (1.1)

5.4.2 Sensor > Setup (1.2)

5.4.3 Datalogger/Setup (2.1)

5.4.4 Datalogger/Files (2.2)

5.4.5 Zero (3)

5.4.6 Calibration (4)

5.4.7 Setup/Date/Time (5.1)

5.4.8 Setup/Battery status (5.2)

5.4.10 Setup/Information (5.4)

5.4.11 Setup/Large Display (5.5)

5.4.12 Utilities/Stopwatch (6.1)

5.4.13 Utilities/Water level (6.2)

5.4.14 Extras/ GPS (6.3)

6 HANDLING VIA A PC

6.1 Start-up

6.2 Starting the unit

7 CHANGING THE BATTERY

8 TECHNICAL DATA

9 PARTS SUPPLIED

10 ACCESSORIES

11 WARRANTY

12 WASTE DISPOSAL

1 SAFETY PRECAUTIONS

- Read the operating instructions thoroughly and com-

pletely prior to starting the unit. This is important for your

own protection and for avoiding damage to the unit.

- Use the unit solely for its intended purpose.

- The unit is intended solely for use in dry rooms where

there is no risk of explosion.

- Protect the device against dust, moisture, and vapours.

Clean the unit with a slightly moist, lint-free cloth. Do not

use any aggressive cleaning agents or solvents.

Attention!

2

- Use the experimental set-up solely for the intended pur-

pose.

- Do not open the unit. It is not necessary to replace the

rechargeable battery.

- Based on today's state of software development, it is

impossible to guarantee that a product is completely free

from errors or defects. This is why PHYWE Systeme

GmbH & Co. KG does not accept any liability for damage

that results from the installation or use of this unit.

2 PURPOSE AND CHARACTERISTICS

The Cobra4 Mobile-Link 2 is used for the mobile acquisition

of measurement values that are generated by way of a Co-

bra4 Sensor-Unit.

For this purpose, the unit is equipped with an SD/MMC

memory card. The control menu of the unit enables all rele-

vant adaptations, e.g. the calibration and taring of the unit,

without the need for a PC.

In order to transfer the data to the PC after the completion of

the measurement, the Cobra4 Mobile-Link 2 is equipped with

a USB socket. As an alternative, the memory card can be

removed and the data can be transferred to a PC by way of a

reading device. Ensure that no other Cobra4 device is con-

nected to the PC during the data transfer.

The power supply of the Mobile-Link 2 is ensured by an inte-

grated, rechargeable lithium-ion battery with a charge of

1950 mAh. Due to its technology, it exhibits a certain, mini-

mum level of self-discharge. This is why we recommend

checking the charge of the battery prior to using the device,

and to recharge it if necessary.

The battery can be charged via a computer by way of a USB

cable or by way of the supplied power supply unit.

3 FUNCTIONAL AND OPERATING ELEMENTS

3.1 Operating elements on the top

The Cobra4 Mobile-Link 2 is equipped with various elements

for the measurement data display, operation, and status

indication. These elements are explained in detail in the

following sections (Fig. 2).

1. ON/OFF switch

For switching the unit on and off. The process of

switching the unit on or off is confirmed by way of a

sound signal (brief beeping sound). The unit has an

automatic switch-off function in order to prevent the

battery from being discharged: If no measurement is

performed, the unit will be switched off ten minutes af-

ter the last actuation of a button. If the voltage falls be-

low a critical level during the measurement data re-

cording process, an audible alarm will be issued and

the unit will save the measurement values that have

been recorded up to this moment. Then, the unit will

switch off.

2. Display

Colour representation of the measurement values and

selection elements for the menu navigation.

3. LED Battery

For indicating the battery charging process. The LED

lights when a power supply unit or USB cable is con-

nected.

4. Navigation arrows

For selecting a specific measurement

value in the case of multi-channel sen-

sors and for the menu navigation.

5. Confirmation key

For starting and stopping the measurement data re-

cording process and for the menu navigation.

3.2 Sensor interface

The front of the unit is equipped with an interface via which

the connection to a corresponding Cobra4 Sensor-Unit is

realised. This mechanically secure connection is made by

way of lock knobs and holes on/in both units (Fig. 3).

Fig. 3: Cobra4 Mobile-Link 2 – front with sensor interface. The

lock knob  can be inserted into the hole  of the cor-

responding counterpart.

Fig. 2: Cobra4 Mobile-Link 2 – operating elements















3

3.3 USB interface for the PC

A USB mini-socket is integrated into the sealing cap at the

front of the device (Fig. 4). It is used for the data transfer to

the PC (after the measurement or simultaneously) and for

charging the integrated battery.

3.3 Recording function of the memory card

The recording of measurement values requires a memory

card (e.g. part no. 12620-01; SD/MMC format). Push the card

into the slot in the housing until it locks into place. On the

display, the symbol will be displayed in the header.

In order to unlock the card, press against it and remove it

(Fig. 5).

If no memory has been inserted, a warning sound will be

issued and a warning symbol will be displayed in the header

of the display: .

4 NOTES ON OPERATION

The device fulfils the technical requirements that are summa-

rised in the current directives of the European Community.

The product characteristics entitle the unit to bear the CE

mark. Compliance with the following instructions must be

ensured:

- The unit must be used under the supervision of an ex-

pert and in an electromagnetically controlled environ-

ment at research, teaching, and training facilities

(schools, universities, institutes, and laboratories).

This means that, in such an environment, radio trans-

mission devices, e.g. mobile phones, should not be used

in the direct vicinity of the unit. The connected cables

must not be longer than 2 m.

- The measurement data recording process as well as the

general operation of the device can be influenced by ra-

diofrequency fields.

- Electrostatic charges or similar electromagnetic phe-

nomena (HF, bursts, indirect lightning discharge, etc.)

may affect the unit so that it will not work within the

specified data range.

The following measures reduce or eliminate the poten-

tial interferences: Ensure equipotential bonding and use

shielding when using the device in combination with a

PC (in particular with a laptop computer). Do not use

radiofrequency transmitters (e.g. radio sets or mobile

phones) in the direct vicinity of the unit. After a complete

shut-down of the unit, it must be switched off and on

again by way of the ON/OFF switch (operating ele-

ment ①). If the unit does not react, keep the ON/OFF

switch pressed for more than 3 seconds so that the unit

will restart.

5 MOBILE HANDLING

This section describes the start-up of the Cobra4 Mobile-

Link 2 and provides an overview of its handling. Please read

this section thoroughly in order to avoid failures or operating

errors.

5.1 Start-up

If the unit is used for the first time, charge the integrated

battery via the USB interface. This can be realised either with

the supplied power supply unit or with the aid of the USB

cable that must be connected to a computer. The charging

process is indicated by the battery LED on the front of the

unit and, if the unit is switched on, in the header of the dis-

play.

In order to record measurement data, the memory card must

be inserted beforehand as described under 3.3.

If the stored data are to be displayed and evaluated on the

PC by way of the measurement evaluation software "meas-

ure", the necessary drivers and programs must be installed

on the PC beforehand via the supplied CD. To do so, insert

the supplied "measure" CD into the drive of your PC and

follow the instructions.

5.2 Starting the unit

The unit is switched on by way of the ON/OFF switch as

described in 3.1.1.

After the unit has been switched on, the start screen will be

displayed. The header of the display includes various sym-

bols that describe the status of the unit.

If no Cobra4 Sensor-Unit is connected to the device, the

Cobra4 Mobile-Link 2 automatically uses the three measuring

channels of the integrated acceleration sensor. This is con-

firmed in the header of the display by way of the word "Ac-

celeration".

In the upper half of the display, i.e. in the main field, one of

the three channels of the acceleration sensor and the associ-

ated measured values are displayed in a large form. The

other two measuring channels are displayed in smaller form

in the field below.

The footer of the display shows the existing navigation op-

tions of the user (see Fig. 6).

Fig. 4: Cobra4 Mobile-Link 2 – front with USB interface

Fig. 5: Cobra4 Mobile-Link 2 – view from the side with the

slot for the memory card.

4

If a sensor is connected, the name of the Cobra4 Sensor-Unit

will be displayed in the header of the display (see Fig. 7).

The navigation keys ▲▼ can be used to select the value that

is to be displayed in a large form in the main field.

The navigation key ◄ opens the analogue display.

The navigation keys ▲▼ can be used to select the value that

is to be displayed in the analogue display.

The scaling values that are displayed must be multiplied by

the value that is indicated in the lower left-hand corner. In the

example above: value x1.

The left arrow button ◄ can be used to “zoom” the scaling of

the analogue display. In doing so, the values of the display

will be divided in half. Depending on the sensor, this can be

performed up to three times.

5.3 Measurement data recording process

A measurement can be started and stopped by pressing the

confirmation key . The measurement data recording proc-

ess is indicated by a red, flashing dot in the upper right-hand

corner of the main field of the display. The recording sym-

bol in the lower display line turns into stop symbol . The

measurement values are saved to the memory card at the set

measurement interval (Fig. 9).

Fig. 7: Display with a connected Cobra4 Sensor-Unit in the

recording mode of the main display

Fig. 6: Display when no sensor is connected to the unit.

Fig. 8: Display without a connected Cobra4 Sensor-Unit

Fig. 9: Display without a connected Cobra4 Sensor-Unit in

the recording mode of the main display

Electricity

Voltage U / V

0.00

I −0.01 A

Header

Main field

Minor field

Footer

Acceleration

Acceleration ax / g

0.00

ay −0.01 g

az −1.00 g

Acceleration

ax −0.01 g

x1

-2

-1

0

1

2

Acceleration

Acceleration ax / g

0.00

ay −0.01 g

az −1.00 g

5

During the measurement, the measurement curve can be

displayed and observed in the data display window by way of

the right arrow key ► (Fig. 9). The left arrow key ◄ leads

you back to the main screen. The data display window can

be opened only during a running measurement.

The measuring channel can be selected and viewed sepa-

rately in the data display window by way of the arrow

keys ▲▼.

The right arrow button ► can be used to zoom the Y-scaling.

In doing so, the values of the Y-axis will be divided in half.

Depending on the sensor, this can be performed up to three

times.

Depending on the selected measuring channel, the associ-

ated graph, which is currently being recorded, is displayed in

yellow in the main field and a red dot flashes in the upper

right-hand corner. The dot disappears when the measure-

ment is stopped with .

In the minor field, the upper value indicates the current

measuring channel . The value for indicates the sam-

pling rate (logging) that can be set in the "Datalogger" menu.

indicates the duration of the measurement and shows

the name of the measurement.

For every series of measurements, a separate file will be

stored on the memory card. The file name consists of the

date and a running counter: YYMMDDxx.mli (xx = 00…99).

Ensure that the date and time are set in the Cobra4 Mobile-

Link. This can be checked and, if needed, changed in the

"Setup" menu.

After the completion of the measurement data recording

process, the data can be transferred to the evaluation soft-

ware "measure" where they can be represented and proc-

essed in graphical form. Either the USB interface or a card

reader and the SD card can be used for the data import. The

format of the measurement value file enables it to be im-

ported into a spreadsheet program, e.g. Excel.

If the device is rotated to the left by 90° (i.e. anti-clockwise)

while the data display window is active, the graph will be

enlarged.

Rotating the device to the right (i.e. clockwise), the original

display will be restored as shown in Fig. 9.

5.4 Control menu

The control menu of the Cora4 Mobile-Link 2 is structured as

shown in Fig. 14.

It can be called up by way of the arrow key in the main

screen and it is subdivided into the following blocks (Fig. 12).

Fig. 11: Graph in the landscape format

Fig. 10: Display without a connected Cobra4 Sensor-Unit in

the recording mode of the data display

Fig. 12: Display of the control menu

Acceleration

t/s

Menu

Sensor

Datalogger

Zero

Calibration

Setup

Utilities

Sensor

Acceleration

2

1

0

-1

-2

ax / g

t / s

1 2 4 5 6 7 8 9 10 11

Acceleration

ax −0.01 g

50 ms

00:01:30

13010101 .mli

ax/g

2 –

1 –

0 –

- 1 –

- 2 –

6

The arrow keys  of the navigator are used for the

navigation within the menu. Selections must be confirmed

with the confirmation key .

The following subchapters explain the various menu items of

the Cobra4 Mobile-Link 2 based on the menu structure in

Fig. 11.

5.4.1 Sensor/Range (1.1)

In the case of sensors with more than one measuring chan-

nel, the measuring channel that is to be used can be selected

by way of ◄► (e.g. in the case of acceleration: , , or

). For every channel, a different measuring range (−2…2,

−4…4 or −8…8) can be set. Then, the unit (e.g. g or m/s2) can

be specified (Fig. 13). Confirm the settings with the confirma-

tion key . This will lead you back to the "Sensor" submenu.

5.4.2 Sensor > Setup (1.2)

In the case of some sensors, the "Sensor" menu includes the

additional menu item "Setup".

The following section provides an overview of the individual

changes that are possible for these special sensors:

Temperature compensation

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Chemistry (12630-00)

- Cobra4 Sensor-Unit pH (12631-00)

- Cobra4 Sensor-Unit Conductivity+ (12632-00)

It enables the automatic temperature compensation of a pH

or conductivity measuring channel, e.g. T(1), with regard to a

temperature input, or the manual input of a known tempera-

ture with the purpose of compensation (Fig. 15, first and

second point in the menu).

Apart from the manual adjustment of the temperature com-

pensation, it is also possible to enter the temperature of the

solution. As far as the Cobra4 Sensor-Unit pH (12631-00) is

concerned, the manual control can be switched on or

off via a switch and by way of ◄►.

Temperature coefficient

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Conductivity+ (12632-00)

Input of a temperature coefficient for application to a conduc-

tivity measuring channel (Fig. 15, third point).

Fig. 14: Menu structure of the Cobra4 Mobile-Link

Fig. 13: Display of the "Range" menu for the "Accelera-

tion" sensor in the Cobra4 Mobile-Link

Range

Menu

Channel ax

Range -2…2

Unit g

Menu > Sensor

!

Zero

3

Setup

Date/Time

Battery status

Device

Information

Large Display

5

5.1

5.2

5.3

5.4

5.5

Datalogger

Setup

Files

2

2.1

2.2

Calibration

One Point

Two Point

Reset

4

4.1

4.2

4.3

Sensor

Range

Setup

1

1.1

1.2

1

Utilities

Stopwatch

Water level

6

6.1

6.2

GPS

6.3

2

1

Only in case of sensors with setting options

2

Only in case of Mobile-Link GPS (12620-20)

7

Kind of Field

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Tesla (12652-00)

It offers the selection of the type of magnetic field, i.e. either a

homogeneous or an alternating field (Fig. 16).

Acoustic Pulses

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Radioactivity (12665-00)

It is used for adjusting an acoustic feedback that will be is-

sued when a certain event occurs. It can be switched

on and off via a switch (Fig. 17).

GM Voltage

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Radioactivity (12665-00)

It is used to change the counter tube voltage in order to

measure the counter tube characteristics.

Gate time

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Radioactivity (12665-00)

It is used to change the counter tube voltage in order to

measure the counter tube characteristics (Fig. 17).

Fig. 15: Display of the submenu "Setup" for the Cobra4 Sensor-

Unit Conductivity+ (12632-00)

Fig. 16: Display of the submenu "Setup" for the Cobra4 Sen-

sor-Unit Tesla (12652-00)

Fig. 17: Display of the submenu "Setup" for the Cobra4 Sen-

sor-Unit Radioactivity (12665-00)

Setup

Menu

Setup

Menu

Setup

Menu

Temp. Comp. Manual

Fluid temp. 23.0 °C

Coeff. 1.00 %/K

Menu > Sensor

Kind of Field

Menu > Sensor

Acoustic Pulse

GM Voltage 100 V

Menu > Sensor

8

Mode

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Timer / Counter (12651-00)

The following operating modes of the Timer / Counter can be

selected (Fig. 17):

Measurement of shading times

Measurement of runtimes from the start until the

crossing of the light barrier

Start-stop when crossing the light barrier

Counter mode

Frequency measurement

Wind measurement (with sensor 12124-00)

Start

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Timer / Counter (12651-00)

It is used to select the type of start, i.e. a manual start with ,

an automatic start with a rising signal or with a falling

signal , or with the external triggers or (Fig. 18).

Gate time

This setting option is available for the following Cobra4 Sen-

sor-Units:

- Cobra4 Sensor-Unit Timer / Counter (12651-00)

5.4.3 Datalogger/Setup (2.1)

The following changes are possible:

- Selection of the single-value measurement mode by way

of a switch. This ensures that only one value will be re-

corded when a measurement is started. (2.1.1)

- Selection of the time interval between the individual

measurements and of the unit of measurement (2.1.2

and 2.1.3).

- Toggling between time and the measurement value

number as an X-data set (2.1.4).

5.4.4 Datalogger/Files (2.2)

In the "Datalogger" menu, already existing measurements

can be displayed and deleted (Fig. 20).

Fig. 19: Display of the submenu "Datalogger" for the Cobra4

Mobile-Link 2

Fig. 18: Display of the submenu "Setup" for the Cobra4 Sensor-

Unit Timer / Counter (12651-00)

Fig. 20: Display of the submenu "Datalogger > Files" for the

Cobra4 Mobile-Link 2

Files

Menu

OK

Setup

Menu

Mode Timer

Start

Gate time 1 s

Menu > Sensor

Setup

Menu

Single Values

Logging every 50

Measure Unit ms

X-Axis data Time

Menu > Datalogger

13010101.MLI

13010501.MLI

13010502.MLI

13010503.MLI

13010504.MLI

Date: 01/01/2013

Sensor: Acceleration

X-axis data Time

9

Deleting files:

Select the file with . Delete the file with the arrow key ►.

A warning asking whether you really want to delete the file

will be displayed. Press the confirmation key in order to

confirm. The arrow key ◄ leads you back to the "Files"

menu.

Opening a file and displaying it as a graph:

Select the file with .

Confirm your selection with . The file will be opened and

displayed as a graph in the landscape format.

The graph can be retraced by way of the arrow keys ◄►.

The green crosshairs on the graph indicate the current posi-

tion. The pair of values of the graph is also displayed in

green. When the last measuring point is reached, a new

segment of the graph will be displayed automatically. You

can exit the graph with and return to the file selection

window (Fig. 20). ▲▼ can be used to change the measuring

channel.

5.4.5 Zero (3)

This menu item enables the measurement values of the

measuring channels to be manually reset to zero.

To do so, the switches of the desired channels are set from

off to on by way of the arrow keys ◄►

(Fig. 20).

You can exit the submenu and return to the menu by way

of .

5.4.6 Calibration (4)

In the case of the one-point calibration (4.1), the value that is

currently measured via a channel (actual) is shifted to an-

other value (set) by way of a constant (Fig. 23).

In the case of the two-point calibration (4.2), each of the two

values that are measured is assigned to a new value.

Before the new calibration data are stored in the sensor, an

"attention" message is displayed. Confirming the message

with stores the values, whereas ◄ cancels the storage.

Fig. 21: Representation of a file in the form of a graph

Fig. 22: Display of the submenu "Zero" for the Cobra4 Mobile-

Link 2

Fig. 23: Display of the submenu "Calibration" for the Cobra4

Mobile-Link 2

Zero

Menu

ax 0.00 g

ay 0.34 g

az 0.00 g

Menu

One Point

Menu

Channel G

Ref. -0.1 μS/cm

Actual 0.3 μS/cm

Menu > Calibration

2

1

0

-1

-2

ax / g

t / s

1 2 4 5 6 7 8 9 10 11

Acceleration

0.95 g

0.8 s

10

After an unsuccessful calibration, the values can be reset to

the factory settings by way of "Reset" (4.3). An "attention"

symbol will be displayed requiring the user to confirm the

entry.

Note: If the Cobra4 Sensor-Unit Conductivity+ (12632-00) is

used, the menu item under 4.3 is the item Cell constant.

Here, the cell constant of the conductivity sensor that is used

can be entered and saved.

5.4.7 Setup/Date/Time (5.1)

The date and time can be selected by way of the navigation

keys ▲▼ and they can be adjusted with ◄►.

5.4.8 Setup/Battery status (5.2)

The current consumption of the activated Cobra4 Mobile-

Links leads to a continuous decrease of the supply voltage.

This menu can be used to enquire the battery status. In addi-

tion, the total capacity of the battery, the charging time, and

the remaining capacity are displayed (Fig. 24).

If the capacity of the battery falls below a critical threshold

(10 % of the remaining battery capacity) the battery symbol

will be displayed in red in the header of the display. Prior to

the automatic shut-down of the device, any running meas-

urements will be stored automatically.

5.4.9 Setup/Device (5. 3)

Selection of the device properties by way of the arrow

keys ▼▲ and confirmation by way of the confirmation key .

The following settings can be realised by way of ◄►:

- Language of the device menu. You can choose between

German , English , and Russian .

- Sound: The sound of the keystrokes of the device can be

switched on or off .

- GPS: (option) In order to localise the device, a satellite

connection can be set up. This function is switched off as

standard. After it has been switched on by way of the

switch, the GPS symbol will be displayed in the

header.

- The automatic rotation of the device display can be

switched on and off .

Use the confirmation key in order to confirm a new setting.

5.4.10 Setup/Information (5.4)

Here, you can find general information concerning your de-

vice, e.g. the number of the firmware version, the number of

devices, and the last update of the Mobile-Link.

5.4.11 Setup/Large Display (5.5)

Here, the settings options for communication with up to two

large-scale display units (07152-93) can be selected if a

Display-Connect (12623-00) is attached.

The uppermost channel of the measurement display will be

transferred automatically to the first large-scale display unit. If

a second large-scale display unit is connected, the second

measuring channel that is to be displayed can be selected for

five radio channels.

5.4.12 Utilities/Stopwatch (6.1)

This feature enables you to record a time interval in the range

of a hundredth of a second.

After the start of the measurement with , it is possible to

pause the measurement with ► and to resume it afterwards.

For every pause, one measurement value will be saved to a

list. Up to three measuring points can be displayed simulta-

neously. Then, the first one will be overwritten. Pressing

again stops the measurement and reset the stopwatch to

00:00:00.

Pressing ► while there is no running measurement will de-

lete all of the measurement values.

The various activities are visualised in the footer of the dis-

play.

Fig. 25: Display of the "Stopwatch" utility of the Cobra4 Mo-

bile-Link 2 after the second measurement

Fig. 24: Display of the submenu "Battery status" for the Co-

bra4 Mobile-Link 2

The setup data will be maintained in a bat-

tery-buffered manner for up to 8 years. How-

ever, this requires regular recharging of the

built-in battery.

Battery status

Menu

Stopwatch

10:20:67

00:01:38

10:20:67

00:00:00

Start

Capacity 1905 mAh

Remaining 1543 mAh

Rem. Time 191 min

81 %

Start

Menu > Setup

11

5.4.13 Utilities/Water level (6.2)

Here, you can select a water level that can be used to align

experiments horizontally and vertically on a plane or on a

wall.

Alignment on a plane:

Lay the instrument flat on its back and align the surface until

the bubble is located precisely in the centre of the crosshairs.

Horizontal and vertical alignment:

Set up the instrument on its side and hold it against a rail or

similar that is to be aligned. The rail is aligned when the bub-

ble is located between the lines.

In order to tare the water level to 0, press the right arrow

key ► and confirm with or reject with ◄.

5.4.14 Extras/ GPS (6.3)

Here, the geographical coordinates of the current location are

indicated.

The indication is in degrees, minutes, and seconds.

This menu item can only be used in combination with a Mo-

bile-Link 2 GPS (12620-20) and GPS activated.

See also chapter 5.4.9.

Coordinates will not be displayed unless satellites have been

found. In addition, the successful detection of satellites is

indicated by an icon in the header.

Satellites found

No satellites found

6 HANDLING VIA A PC

6.1 Start-up

First, all of the necessary drivers and operating programs that

can be found on the CD must be installed on the PC. This

requires the full version of the "measure" software, part no.

14550-61.

Fig. 26: Display of the "Water level" of the Cobra4 Mobile-

Link 2 on a plane (level).

Fig. 27: Display of the "Water level" of the Cobra4 Mobile-

Link 2 in a vertical/horizontal position.

Fig. 29: Display of the Cobra4 Mobile Link Mobile-Link 2 when

it is connected to a PC via the USB port.

Fig. 28: GPS coordinates in case of detected satellites

Weather 01

Water Level

GPS

Menü

Menu > Extras

Latitude:

Longitude:

51°38‘12“

12

6.2 Starting the unit

Prior to connecting the unit to the PC, attach the desired

Cobra4 Sensor-Unit to it. Following the connection of the

device to the PC via the USB port, the connection is con-

firmed visually on the display of the Cobra4 Mobile-Link 2

(Fig. 29).

The upper area of the display shows the sensor that has

been identified as well as the device number (if several Co-

bra4 devices are connected via the USB interface, they are

numbered). In the upper right-hand corner, a measurement

that is started via the PC is indicated by the recording sym-

bol .

Once the connection has been set up, Cobra4 Mobile-Link 2

and the connected Sensor-Unit are automatically displayed in

the "measure" software together with all of the measuring

channels. All further steps, such as the recording of meas-

urement values or changing of the measurement parameters,

are software-based and, therefore, not described in this

document.

7 CHANGING THE BATTERY

If the capacity of the battery decreases strongly, it is possible

to change the battery. Please note that damage resulting

from a battery change are not covered by the warranty. You

can send the Mobile-Link to the repairs department of

PHYWE in order to have the battery changed.

Step 1: Open the battery cover by pressing a pen or another

object onto the holder of the battery cover.

Attention: Open the left-hand side first, followed by the right-

hand side, in order to ensure that the flat cable connector that

is located on the left of the battery is not damaged.

Step 2: Disconnect the battery connector from the circuit

board. Remove the old battery. Insert the new battery into the

holder.

Step 3: Connect the connector of the new battery.

Attention: Ensure that the cable is located above the USB

connector or, otherwise, the cover cannot be closed.

8 TECHNICAL DATA

typical for 25 °C:

Operating temperature range 5–40 °C

Relative humidity < 80 %

Device for mobile data acquisition and storage with a USB

interface for the data transfer to a PC

Power supply integrated lithium-ion

battery 1950 mAh

Data memory SD/MMC

Data rate (max.) 2 kHz in combination with

a PC

Dimensions (L x W x H) 155 mm x 65 mm x 35 mm

Mass 200 g

Battery life up to 6 h

1

2

13

9 PARTS SUPPLIED

Cobra4 Mobile-Link 2 is supplied with the following compo-

nents:

- Operating Instructions

- Lithium-ion battery

In addition, the set “Cobra4 Mobile-Link 2 incl. accessories”

(art. no. 12620-10) contains:

- USB cable

- Power supply unit

- SD memory card

- "measure" CD for the installation of the drivers and op-

erating software for importing the data from the SD

memory card

10 ACCESSORIES

- USB power supply for Cobra4 devices 07932-99

- Replacement battery for Cobra4 Mobile-

Link 2 and Wireless-Link 2 07932-01

The real-time data recording with a PC requires the full ver-

sion of the "measure" software:

- "measure" DVD, single- and multi-user licence 14550-61

Cobra4 Mobile-Link 2 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+

Conductivity / Temperature (Pt1000) 12632-00

- Cobra4 Sensor-Unit Conductivity with

stainless steel electrodes 12633-00

- Cobra4 Sensor-Unit Colorimeter 12634-00

- Cobra4 Sensor-Unit Drop Counter 12636-00

- Cobra4 Sensor-Unit Thermodynamics:

Pressure 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 CO2 12671-00

- 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

For fixing Cobra4 Mobile-Link 2 in position with a stand rod in

experimental set-ups, we recommend the following acces-

sory:

- Support for Cobra4 with stand rod 12680-00

For table-top set-ups with Cobra4 Mobile-Link 2, we rec-

ommend as accessory:

- Holder for Cobra4 12681-00

We recommend the following accessory for reading out the

SD memory card of the Cobra4 Mobile-Link 2:

- SD card reader 12620-03

11 WARRANTY

We give a warranty of 24 months for units supplied by us

inside the EU, and a warranty of 12 months outside the EU.

The following is excluded from the warranty: Damage that is

due to non-compliance with the operating instructions, im-

proper use, or natural wear.

The manufacturer can only be held liable for the function and

safety-relevant properties of the unit, if the maintenance,

service, and modifications of the unit are performed by the

manufacturer or by an institution that is expressly authorised

by the manufacturer.

12 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 +49 (0) 551 604-274

Fax +49 (0) 551 604-246

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 Cobra4 Mobile-Link 2 Operating Instructions Manual

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