PHYWE Cobra SMARTsense User manual

1
www.phywe.com, © All rights reserved 12921-00 / 4319
Operating
instructions
Cobra SMARTsense pH 0… 14
12921-00
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-guidelines
Fig. 1: 12921-00 Cobra SMARTsense pH 0… 14
TABLE OF CONTENTS
1SAFETY PRECAUTIONS
2PURPOSE AND CHARACTERISTICS
3FUNCTIONAL AND OPERATING ELEMENTS
4NOTES ON OPERATION
5 HANDLING
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.
2 PURPOSE AND CHARACTERISTICS
The sensor is used for measuring pH values and for transfer-
ring 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
3.1 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 5 seconds
Low battery
3.2 Measurement inputs
The face of the sensor has a BNC connector to which the
supplied pH electrode can be connected.
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 Start-up
Switch the sensor on by pressing the on-button for more than
3 seconds. The Bluetooth LED lights up red. Start the
measureApp application and select the sensor.
There is a 9-digit
code on the back of
the sensor (Fig.2).
The last 4 digits of
the code are dis-
played as the sensor
name in the software
(Fig.3). This enables
the precise assign-
ment of the sensors
within the software.
Fig. 2
Fig. 3
Connect the supplied pH electrode to the BNC connector of
the sensor.
5.2 Measurement of pH values
To measure the pH value of a medium, the pH electrode at
the measuring head must be completely immersed into the
medium. If a whole series of different solutions is to be
measured, we recommend rinsing the pH electrode in be-
tween the measurements with pure water and to shake the
water off carefully in order to prevent the contamination of the
next sample with the residues of the previous one. If absolute
pH values are to be measured, the pH electrode should be
calibrated beforehand, e.g. with the pH 4 buffer tablets (ref.
no. 30281-10) and with the pH 10 buffer tablets (ref. no.
30283-10). The solution should always remain slightly in mo-
tion during the measurement. This can be realised by stirring
the liquid with a magnetic stirrer or similar or by moving the
measuring probe carefully to and fro.
5.3 Maintenance and cleaning of the measuring probe
Please observe the maintenance and care instructions of the
pH electrode. Notes concerning outdoor use: We recommend
calibrating the pH electrode at the laboratory with buffer tab-
lets or a buffer solution prior to executing the outdoor experi-
ment. When preparing the buffer solution with buffer tablets,
use 20 ml of distilled water. While a 3 M KCl solution should
be used for the long-term storage of the pH electrode, the
electrode for outdoor measurements in the protective sheath
(ref. no. 37651-15) can be stored briefly in tap water. Do not
use distilled water for storage! Do not allow the pH electrode
to dry completely!
5.4 Replacing the battery
Remove the battery
Open the sensor by turning the screw
cap on the back of the sensor
counterclockwise e.g. with a coin.
Fig. 4
Carefully lift the battery out of
its socket with the aid of a
small screwdriver or small
scissors. Insert the screw-
driver as shown in Fig. 5.
Fig. 5

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Insert new battery
Slide the battery under the golden metal nose (Fig.6-1). Make
sure that the battery is completely under the metal nose and
is pushed completely to the upper edge.
Press the battery into the socket
by applying light pressure on the
opposite side.
The battery slides under the two
plastic lugs (Fig. 6-2), which can
also be noticed by a short "click”.
Fig. 6
Before closing the lid, make sure that
the seal in the lid is not bent and lies
cleanly on the edge of the lid. After
closing, turn the lid clockwise to
tighten it.
Fig. 7
6 TECHNICAL DATA
Operating temperature range: 5 - 40°C
Rel. humidity < 80%
Measuring range
Resolution
pH 0… 14
0.01 pH
Max. data transfer rate
Battery type
Max. wireless range (open field)
Dimensions (width x height x depth
100 Hz
CR2032
30 m
90 x 44 x 23 mm
Weight
42 g
7 SCOPE OF DELIVERY
The extent of delivery is as follows
Cobra SMARTsense pH 12921-00
pH-electrode
Operating instructions
8 ACCESSORIES
The following accessories are available:
Button Cell CR2032, 3V 07922-15
pH-Electrode; BNC 46265-15
Buffer solution tablets, pH 4 30281-10
Buffer solution tablets, pH 7 30282-10
Buffer solution tablets, pH 10 30283-10
Buffer solution, pH 4,01, 1000 ml 46270-12
Buffer solution, pH 4,62, 1000 ml 30280-70
Buffer solution, pH 7,01, 1000 ml 46271-12
Buffer solution, pH 9,00, 1000 ml 30289-70
Buffer solution, pH 10,01, 1000 ml 46272-12
Storage flask for pH electrodes, filled with
250 ml 3.0 M KCl solution 18481-20
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
2
1
PHYWE Systeme GmbH & Co.KG hereby
declares that the radio system type 12921-
00 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