PreSens pH-10 mini Bedienungsanleitung
PreSens
Precision Sensing GmbH
Instruction Manual
pH-10 mini
10-Channel Minisensor pH-Meter
PreSens
Precision Sensing GmbH
Instruction Manual
pH-10 mini
10-Channel Minisensor pH-Meter
Manual version 3
PC software version pH10-10_v6
PreSens
Precision Sensing GmbH
Josef-Engert-Strasse 11
D-93053 Regensburg
Germany
Phone +49 941 942 72 0
Fax +49 941 942 72 27
Internet www.PreSens.de
Content
1Preface............................................................................................................................3
1.1 Safety Guidelines ...................................................................................................4
2Description of the pH-10 mini Device...........................................................................6
2.1 Instrument...............................................................................................................6
2.2 Front Panel of the pH-10 mini Device...................................................................6
2.3 Rear Panel of the pH-10 mini Device....................................................................7
2.4 Required Basic Equipment....................................................................................8
3pH-Sensitive Minisensors .............................................................................................9
3.1 General Description ...............................................................................................9
3.2 Dynamic range........................................................................................................9
3.3 Characteristics of a typical pH sensor...............................................................10
3.4 Cross sensitivities................................................................................................10
3.5 Sensor drift...........................................................................................................11
3.6 Temperature dependency....................................................................................11
3.7 Limitations of optical pH sensors.......................................................................12
3.8 Response time......................................................................................................12
3.9 Housings of pH-Sensitive Minisensors..............................................................12
3.9.1 Planar Analyte-Sensitive Foils........................................................................13
3.9.2 Flow-Through Cell - pH Minisensor................................................................14
4Software........................................................................................................................16
4.1 Software Installation............................................................................................16
4.2 Starting pH-10 mini and its Software..................................................................18
4.3 Function and Description of the pH-10 mini Software......................................19
4.3.1 Menu Bar:.......................................................................................................19
4.3.2 Status Bar.......................................................................................................20
4.3.3 Control section ...............................................................................................20
4.3.4 Channel selection...........................................................................................23
4.3.5 Data Handling.................................................................................................24
5Mounting sensors........................................................................................................24
5.1 Mounting planar sensor spots............................................................................24
5.2 Mounting flow through cells ...............................................................................24
5.3 Measurement of a pH Minisensors.....................................................................25
6Calibration ....................................................................................................................26
6.1 Calibration.............................................................................................................26
6.2 Re calibration........................................................................................................26
6.2.1 Determination of calibration constants...........................................................27
Content
7Some Advice for Correct Measurement.....................................................................29
7.1 Signal drift due to photo-decomposition...........................................................29
7.2 Performance proof...............................................................................................29
8General Instructions:...................................................................................................30
8.1 Warm-Up Time......................................................................................................30
8.2 Maintenance..........................................................................................................30
8.3 Service...................................................................................................................30
9Technical Data General Data.......................................................................................31
9.1 Technical Notes....................................................................................................33
9.2 Operation Notes ...................................................................................................33
10 Appendix.......................................................................................................................34
10.1 Dual Lifetime Referenced (DLR) Optical Sensors.............................................34
Preface
3
1 Preface
Congratulations!
You have chosen a new, innovative technology for measuring pH!
The pH-10 mini is a compact, easy to transport and completely PC-controlled fiber optic pH meter.
The data evaluation is PC supported as well.
The pH-10 mini was specially developed for small fiber optic pH sensors, flow-through cells and
integrated sensor systems. It is based on a novel technology, which creates very stable, internally
referenced measured values. This allows a more flexible use of pH sensors in many different fields of
interest.
Optical pH sensors (also called optodes) have some important features:
•They are small
•Their signal does not depend on the flow rate of the sample
•They can be physically divided from the measuring system which means a contactless
measurement
•They are offered steril
•They can be used in disposables.
Therefore, they are ideally suited for the examination of small sample volumes, for highly parallelized
measurements in disposables, and for biotechnological applications.
A set of different pH minisensors, flow-through cells and integrated sensor systems is available to
make sure you have the sensor which is ideally suited for your application.
Please feel free to contact our service team to find the best solution for your application.
Your PreSens Team.
Safety Guidelines
4
1.1 Safety Guidelines
PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE WORKING WITH THIS
INSTRUMENT!
This device has left our works after careful testing of all functions and safety requirements.
The perfect functioning and operational safety of the instrument can only be ensured if the user
observes the usual safety precautions as well as the specific safety guidelines stated in these
operating guidelines.
- Before connecting the device to the electrical supply network, please ensure that the operating
voltage stated on the power supply corresponds to the mains voltage
- The perfect functioning and operational safety of the instrument can only be maintained under
the climatic conditions specified in Chapter 8 "Technical Data" in this operating manual.
- If the instrument is moved from cold to warm surroundings, condensate may form and interfere
with the functioning of the instrument. In this event, wait until the temperature of the instrument
reaches room temperature before putting the instrument back into operation.
- Balancing, maintenance and repair work should exclusively be carried out by a suitable,
qualified technician, trained by us.
- Especially in the case of any damage to current-carrying parts, such as the power supply
cable or the power supply itself, the device must be taken out of operation and protected
against being put back into operation.
- If there is any reason to assume that the instrument can no longer be employed without a risk,
it must be set aside and appropriately marked to prevent further use.
- The safety of the user may be endangered, e. g., if the instrument
•is visibly damaged
•no longer operates as specified
•has been stored under adverse conditions for a lengthy period of time
•has been damaged in transport.
- If you are in doubt, the instrument should be sent back to the manufacturer PreSens for repair
and maintenance.
- The operator of this measuring instrument must ensure that the following laws and guidelines
are observed when using dangerous substances:
•EEC directives for protective labor legislation
•National protective labor legislation
•Safety regulations for accident prevention
•Safety data-sheets of the chemical manufacturer.
The pH-10 mini is not protected against water spray;
The pH-10 mini is not water proof;
The pH-10 mini must not be used under environmental conditions which cause water-condensation in
the housing;
The pH-10 mini must not be opened;
Safety Guidelines
5
We explicitly draw your attention to the fact that any damage of the manufactural seal will render all
guarantee warranties invalid.
Any internal operations on the unit must be carried out by personnel explicitly authorized by PreSens,
and under antistatic conditions.
The pH-10 mini may only be operated by qualified personnel.
This measuring instrument was developed for use in the laboratory. Thus, we must assume that, as a
result of their professional training and experience, the operators will know the necessary safety
precautions to take when handling chemicals.
Keep the pH-10 mini, power supply and optical sensors out of the reach of children!
As the manufacturer of the pH-10 mini, we only consider ourselves responsible for safety and
performance of the device if
•the device is strictly used according to the instruction manual and the safety guidelines
•the electrical installation of the respective room corresponds to the DIN IEC/VDE standards.
The pH-10 mini and the sensors must not be used in vivo examinations on humans!
The pH-10 mini and the sensors must not be used for human-diagnostic or therapeutical purposes!
Description of the pH-10 mini Device
6
2 Description of the pH-10 mini Device
2.1 Instrument
The pH-10 mini is a precision pH meter,
designed for fiber-optic pH minisensors.
For operation, a PC/Notebook with RS-
232 interface is required. The pH-10 mini
is controlled using a comfortable
software, which also saves and
visualizes the measured values
2.2 Front Panel of the pH-10 mini Device
Description of the pH-10 mini Device
7
ELEMENT DESCRIPTION FUNCTION
CH1 – CH10 SMA fiber connector
Connect the fiber optic pH minisensor here
Line Blue Control
LED on: instrument on
off: instrument off
2.3 Rear Panel of the pH-10 mini Device
The electrical specifications of all rear panel connectors are given in the technical specification sheet.
Please read also the technical notes to avoid mistakes.
ELEMENT DESCRIPTION FUNCTION
S1 ON/OFF switch Switches the device ON and OFF
C1 Line adapter for power
supply Connector for 230 V AC power supply
C2 RS-232 interface
(male) Connect the device with a RS-232 data cable to
your PC/Notebook here
C1
C2
S1
Required Basic Equipment
8
2.4 Required Basic Equipment
•pH meter pH-10 mini*
•Software for pH-10 mini*
•PC / Notebook
(System requirements:
Windows XP; Pentium processor, at least 166 MHz, 64 MB RAM,
A RS 232 port or a USB port and a USB-serial adapter is needed)
•RS 232 Cable *
•Line adapter (110 - 220 V AC, 12 V DC) *
•pH-sensitive minisensors
The minisensors are mounted into different types of housings
* scope of supply
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