PHYWE Cobra4 User Manual

Betri

ebsanle

i

tung

EG-Rahmenrichtl

i

nien

PHYWE Systeme GmbH & Co. KG
Robert-Bosch-Breite 10
D-37079 Göttingen

Telefon [phone]
Fax [phone]
E-mail [e-mail]
Internet www.phywe.de

Das Gerät entspricht
den zutreffenden

Cobra4 Sensor-Unit Pressure, 7 bar absolute

12647-00

Fig. 1: 12647-00 Cobra4 Sensor-Unit Pressure, 7 bar absolute

TABLE OF CONTENTS

1 SAFTEY INSTRUCTIONS

2 PURPOSE AND CHARACTERISTICS

3 FUNCTIONAL AND OPERATING ELEMENTS

3.1 Operating elements

3.2 Sensor interface

4 OPERATING NOTES

5 OPERATION

5.1 Start-up

5.2 Recording of pressure values

6 TECHNICAL DATA

7 SCOPE OF SUPPLY

8 ACCESSORIES

8.1 Connecting tubes and tube clamps

8.2 Holder for the Sensor-Unit

9 WARRANTY

10 DISPOSAL

1 SAFETY INSTRUCTIONS

• Read the operating instructions thoroughly and complete­ly prior to starting the Cobra4 Sensor-Unit “Pressure,
7 bar absolute”. The operating instructions of the data
transfer device that is used in combination with the Sen­sor-Unit for recording the measurement values (Cobra4
Wireless-Link, Cobra4 USB-Link, Cobra4 Junior-Link, or
Cobra4 Mobile-Link) must also be read. This is important
for your own protection and for avoiding damage to the
units.

• Use the Cobra4 Sensor-Unit “Pressure, 7 bar absolute”
solely for its intended purpose.

• The unit is intended for use in dry rooms where there is
no risk of explosion.

• Protect the Cobra4 Sensor-Unit “Pressure, 7 bar abso­lute” against dust, humidity, and vapours. Clean the unit
with a slightly moist, lint-free cloth. Do not use any ag­gressive cleaning agents or solvents.

• Do not open the housing of the Cobra4 Sensor-Unit
“Pressure, 7 bar absolute”.

• Ensure that no liquids penetrate the housing of the Sen­sor-Unit, since otherwise the Sensor-Unit would be dam­aged.

• Connect the data output of the Cobra4 Sensor-Unit
“Pressure, 7 bar absolute” solely to the intended mea­surement data recording devices and sensors.

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• Based on today’s state of software development, it is im­possible to guarantee that a product is absolutely free
from errors. This is why PHYWE Systeme GmbH & Co.
KG assumes no liability for damage resulting from the in­stallation or use of this unit.

2 PURPOSE AND CHARACTERISTICS

The Cobra4 Sensor-Unit “Pressure, 7 bar absolute” is used to
measure the absolute pressure. Depending on the type of
application, the Cobra4 Sensor-Unit can be connected to the
following measurement data recording devices for transfer­ring the measured values:

- Cobra4 Wireless-Link (12601-00) for the wireless data

transfer to a computer

- Cobra4 USB-Link (12610-00) for the data transfer to a

computer via a USB cable

- Cobra4 Junior-Link (12615-00) for the data transfer to a

computer via a USB cable

-

Hand-held measuring instrument Cobra4 Mobile-Link
(12620-00).

For the absolute pressure measurement, the Sensor-Unit is
equipped with a pressure sensor. In order to be able to con­nect it to various types of devices and instruments, the sen­sor is equipped with a sturdy metal connector with an outer
diameter of 8 mm. Via this connector, the pressure sensor
can be connected to all kinds of measurement locations via a
suitable connecting tube (e.g. rubber tube, vacuum, inner di­ameter 6 mm; part no.: 39286-00). For safety reasons, such
a tube connection should always be secured with suitable
tube clamps (see chapter 8 - Accessories).

3 FUNCTIONAL AND OPERATING ELEMENTS

3.2 Operating elements

The Cobra4 Sensor-Unit “Pressure, 7 bar absolute” has no
manual operating elements. Its operation is controlled by the
hand-held measuring instrument Cobra4 Mobile-Link or by a
computer if it is connected via a Cobra4 USB-Link, Cobra4
Junior-Link, or Cobra4 Wireless-Link as soon as the connec­tion between the Cobra4 Sensor-Unit “Pressure, 7 bar abso­lute” and one of the four measurement data recording devic­es is set up.

3.2 Sensor interface

The measured pressure values can be read out of the Sen­sor-Unit with a maximum data rate of 200 measurements per
seconds (200 Hz). Just like all of the other settings, the de­sired measuring frequency is set via the connected mea­surement data recording devices.

4 OPERATING NOTES

In combination with the respective data transfer devices (Co­bra4 Wireless-Link, Cobra4 USB-Link, Cobra4 Junior-Link,
and Cobra4 Mobile-Link), the Cobra4 Sensor-Unit “Pressure,
7 bar absolute” fulfils the technical requirements that are
summarised in the current guidelines of the European Com­munity. The characteristics of the product entitle it to bear the
CE mark.

The unit must be used under the supervision of an expert and
in the electromagnetically controlled environment at research,
teaching, and training facilities (schools, universities, insti­tutes, and laboratories).

This means that, in such an environment, radio transmission
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. Electrostatic charges or similar electromagnetic
phenomena (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 potential interfe­rences: avoid carpets; provide equipotential bonding; perform
the experiments on a conductive, earthed surface; use
shields and shielded cables. Do not use radiofrequency
transmitters (radio sets, mobile phones) in the direct vicinity
of the unit.

5 OPERATION

This section describes the start-up of the Cobra4 Sensor-Unit
“Pressure, 7 bar absolute” and the recording of measurement
data.

Please read this section carefully in order to avoid problems
or malfunctions.

5.1 Start-up

Connect the Cobra4 Sensor-Unit “Pressure, 7 bar absolute”
to one of the four possible measurement data recording de­vices via the 15-pin connector. The Cobra4 Sensor-Unit is
immediately ready for use, since its power supply is ensured
via the measurement data recording devices. More informa­tion concerning the control of the measurement data record­ing process can be found in the operating instructions of the
measurement data recording devices Mobile-Link, USB-Link,
Junior-Link, and Wireless-Link.
When performing the measurements in combination with a
PC, please ensure the current version of the “measure” soft­ware package and of the Cobra4 module are installed.
You can find a free software update on our homepage at:
www.phywe.com
 Service  Downloads  Software  measure
“measure” main program
“measure” Cobra4 module

A free software update is also possible via the “measure”
DVD.

5.2 Recording of pressure values

The absolute pressure is measured with a pressure sensor
that is integrated in the housing of the Sensor-Unit. To en­sure easy connection to all kinds of experiment equipment, it
is equipped with a metal connector. Via this connector, the
current atmospheric pressure, for instance, can be measured
directly. If the pressure is to be measured in a closed experi­ment set-up, the pressure sensor must be connected to the
equipment via a tube. Since pressure sensors should be po­sitioned as closely to the measurement location as possible,
this connecting tube should be as short as possible. In addi­tion, it should be able to safely withstand the pressures that
can be expected during the measurement. For safety rea­sons, the tube connection should be secured with suitable
tube clamps.

The Sensor-Unit has two measuring ranges that can be dis­tinguished in terms of the maximum pressure that can be
measured and also in terms of their resolution. The optimum
measuring range for a specific measurement can be selected
via the device-integrated menu if the Cobra4 Mobile-Link is
used. If the Sensor-Unit is used in combination with a Cobra4
USB-Link, Cobra4 Junior-Link, or Cobra4 Wireless-Link, the
measuring range must be selected via the “measure” soft­ware.

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6 TECHNICAL DATA (TYPICAL VALUES FOR
25°C)

Operating temperature range: 5 ... 40°C

Relative humidity: < 80%

Pressure:
Measuring range 1 0...2,000 hPa
Resolution 0.1 hPa

Measuring range 2 0...7,000 hPa
Resolution 0.3 hPa

Overall accuracy ± 2.5%
Overload capacity up to 10,000 hPa
Response time 1 ms (10% ... 90%)

Data transfer rate: 200 Hz

Dimensions:
Outer diameter of the metal connector 8 mm
Housing dimensions (mm) approx. 62 x 68 x 60

Weight 118 g

7 SCOPE OF SUPPLY

The scope of supply includes:

• Cobra4 Sensor-Unit “Pressure,

7 bar absolute” 12647-00

• Operating instructions

9 WARRANTY

We provide a warranty of 24 months for units supplied by us
within the EU, and a warranty of 12 months outside the EU.
Any damage that is due to non-compliance with the operating
instructions, improper use, or natural wear is excluded from
the warranty.
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 solely by the
manufacturer or by an institution that is expressly authorised
by the manufacturer.

10 DISPOSAL

The packaging mainly consists of environmentally-friendly
materials that should be returned to local recycling stations.

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
Customer Service
Robert-Bosch-Breite 10
D-37079 Göttingen

Germany

Tel. [phone]
Fax [phone]

8 ACCESSORIES

8.1 Connecting tubes and tube clamps

In order to connect the pressure sensor to various types of
equipment via its metal connector, numerous different types
of tubes can be used. If the pressure in the system that is to
be measured is higher than the outer pressure, only pres­sure-resistant tubes should be used for safety reasons. In
addition, the tube connections should be secured with tube
clamps.

Rubber tube, vacuum, inner diameter d = 6 mm 39286-00
Rubber tube, inner diameter d = 6 mm 39282-00
Silicon tube, inner diameter d = 7 mm 39296-00
PVC tube, inner diameter d = 7 mm 03985-03
Tube clamp for d = 12-20 mm, 1 piece 40995-00
Tube clamp for d = 8-12 mm, 1 piece 40996-01
Tube clamp for d = 10-17 mm 40998-00
Tube clamp d = 15-22 mm 40999-00

8.2 Holder for the Sensor-Unit

The Sensor-Unit and a connected measurement data record­ing device can be easily and comfortably connected to a
support rod via its holder and a bosshead:

Holder for Cobra4 with a support rod 12680-00

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