PHYWE Cobra SMARTsense User manual

1
www.phywe.com, © All rights reserved 12909-00 / 4518
Operating
instructions
Cobra SMARTsense Photogate
12909-00
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-
g
uidelines
Fig. 1: 12909-00 Cobra SMARTsense Photogate
TABLE OF CONTENTS
1SAFETY PRECAUTIONS
2PURPOSE AND CHARACTERISTICS
3FUNCTIONAL AND OPERATING ELEMENTS
4NOTES ON OPERATION
5 HANDLING
6TECHNICAL DATA
7SCOPE OF DELIVERY
8ACCESSORIES
9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 time and counter values
and for transferring the values to a terminal device, e.g. a
tablet computer, smartphone, etc., via Bluetooth.
Caution!

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3 FUNCTIONAL AND OPERATING ELEMENTS
The Cobra SMARTsense Photogate system includes two
sensors. They are marked with the following symbols:
The sensors are connected by way of a 3.5 mm jack plug. In
addition, both sensors have numerous threaded bushes into
which threaded rods can be screwed to ensure a secure and
precise experiment set-up.
3.1 Sensor A
3.1.1 Operating elements
The sensor has an on-button and two LEDs for indicating the
Bluetooth and battery charge status.
On-button
Press the on-button for more than 3 seconds to switch the
sensor on and off
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
3.1.2 USB port
The battery, which is permanently installed in the sensor, is
charged via the type C USB port.
3.1.3 Connection interface
The supplied cable for connecting the sensors "A" and "B"
must be plugged into the socket.
3.2 Sensor B
3.2.1 Operating elements
The sensor has two LEDs for indicating the operating state
and functional state.
Function of the operating LED
The sensor has two LEDs for indicating the operating state
and functional state.
Function signal LED
This LED lights up when the optical path is uninterrupted. In
the case of an interruption, i.e. if there is an object between
the infrared transmitter and receiver, the LED goes out.
3.2.2 Connection interface
The supplied cable for connecting the sensors "A" and "B"
must be plugged into the socket.
4 NOTES ON OPERATION
This Cobra SMARTsense Photogate fulfils all of the technical
requirements that are compiled in current EC guidelines. The
characteristics of this product qualify it for the CE 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 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
Connect sensor "A" to sensor "B" by way of the supplied
connecting cable.
Switch sensor "A" on by pressing the ON button for more
than 3 seconds. The Bluetooth LED flashes red. At the same
time, the operation LED of sensor "B" lights up. Start the
measureApp application and select the sensor. There is a
four-digit code on the back of the sensor. This code corre-
sponds to the last four digits of the sensor name in the
measureApp application. This enables the precise assign-
ment of the sensors within the measureApp application. After
the sensor has been selected in the measureApp application,
the LED flashes green, thereby signalling that the connection
has been correctly established.If the sensor is switched on,
but not connected, it will switch off automatically after five
minutes.

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5.3 Recording of measurement data
Measuring principle
The infrared light receiver of the sensor, which is located in a
recess for protection against the ambient light, can only be
reached by a very narrow beam of light. As a result, an object
with an effective diameter of less than d = 0.5 mm at any po-
sition of the beam is sufficient for shading the receiver.
Measurement
The sensor supports four operating modes:
1. Run times
2. Shade times
3. Pendeulum
4. Counter
1. The runtime measurement (or propagation time measure-
ment) is a measurement of the time between the start of the
measurement (software switch of the app) and the moment
when the light reaches sensor "A" and sensor "B".
2. The shading time measurement is a measurement of the
time between the moment an object enters the infrared beam
and the moment when it exits the beam.
3. In the "Pendulum" mode, the measurement is started when
the pendulum enters the beam. The second entry of the pen-
dulum into the beam is ignored and the third entry into the
beam stops the measurement. As a result, it is possible to
measure the full period of oscillation of a pendulum.
4. In the "Counter" mode, the number of times an object en-
ters the beam is counted.
6 TECHNICAL DATA
Operating temperature range: 5 - 40°C
Rel. humidity < 80%
Measuring range
Resolution
Wavelength
0…∞s
10 µs
infraredt
Max. date rate
Battery capacity
Dimensions (LxWxH)
Width of fork
Max. wireless range (open field)
1000 Hz
1000 mAh
10 x 93 x 28 mm
50 mm
30 m
Thread for rod installation M6
Weight 120 g
7 SCOPE OF DELIVERY
The extent of delivery is as follows
2 x Cobra SMARTsense Photogate 12909-00
Verbindungsleitung (2x Klinkenstecker)
Operating instructions
8 ACCESSORIES
The following accessories are available:
USB connecting cable type C 07935-00
USB-charger 07934-99
Rod M6 x 100mm 02020-10
Free measureApp available from supplier portals
iOS Android
9 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