pHotoFlex
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Operating manual
pHotoFlex /
pHotoFlex Turb
ba75491d04 07/2006
Handheld photometer
Accuracy when
going to press
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept
any legal claims resulting from the data, figures or descriptions.
Firmware
Method data
Analysis specifications
Operating manual
Part of the process of consequently improving our products is the
continuous further development of the range of photometric tests
supplied and the meter firmware. All current data for the pHotoFlex /
pHotoFlex Turb can be found on the Internet under http://
www.WTW.com.
You can easily transfer new firmware to your instrument with the aid of
the AK 540/B cable and a PC. More detailed information can be found
in the appendix of the detailed operating manual on the CD-ROM
provided.
Copyright
© 2006, WTW GmbH
Reprinting - even as excerpts - is only allowed with the explicit written
authorization of WTW GmbH, Weilheim.
Printed in Germany.
pHotoFlex / pHotoFlex Turb Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.4 Socket field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.5 LabStation (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . 14
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Connecting the LabStation . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Switching on the meter . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2 Inserting a cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3 General operating principles . . . . . . . . . . . . . . . . . . . . . 27
4.3.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.3 Navigation example 1: Setting the language . . . 30
4.3.4 Navigation example 2: Setting the date and time 31
4.3.5 Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.4 System settings (System menu) . . . . . . . . . . . . . . . . . . 35
4.4.1 Measured value memory . . . . . . . . . . . . . . . . . . 36
4.4.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.4.3 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.4.4 Date/time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.5 Photometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5.1 General information . . . . . . . . . . . . . . . . . . . . . . 40
4.5.2 Settings for photometric measurements . . . . . . 41
4.5.3 Measuring the concentration . . . . . . . . . . . . . . . 42
4.5.4 Blank value (reagent blank value) . . . . . . . . . . . 43
4.5.5 Measuring the absorbance/transmission . . . . . 45
4.5.6 Zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . 46
4.5.7 Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.5.8 Analysis timer . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.5.9 Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4.5.10 Measuring diluted samples . . . . . . . . . . . . . . . . 50
4.6 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 51
4.6.1 General information . . . . . . . . . . . . . . . . . . . . . . 51
4.6.2 Measuring the pH value . . . . . . . . . . . . . . . . . . 52
4.6.3 Measuring the ORP voltage . . . . . . . . . . . . . . . 53
4.6.4 Settings for pH and ORP measurements . . . . . 53
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Contents pHotoFlex / pHotoFlex Turb
4.6.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.6.6 Carrying out the TEC and NIST/DIN calibration
procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.7 Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
4.7.1 General information . . . . . . . . . . . . . . . . . . . . . . 62
4.7.2 Aligning and marking a cell . . . . . . . . . . . . . . . . 62
4.7.3 Measuring turbidity . . . . . . . . . . . . . . . . . . . . . . 63
4.7.4 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
4.8 Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.8.1 Storing measurement datsets . . . . . . . . . . . . . . 69
4.8.2 Filtering measurement datsets . . . . . . . . . . . . . 70
4.8.3 Displaying measurement datsets . . . . . . . . . . . . 71
4.8.4 Downloading the measurement datsets to the
RS232
interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
4.8.5 Erasing stored measurement datasets . . . . . . . 72
4.9 Transmitting data (RS 232 interface) . . . . . . . . . . . . . . . 72
4.9.1 Connecting a PC/external printer . . . . . . . . . . . . 72
4.9.2 Configuring the RS232 interface . . . . . . . . . . . . 73
4.9.3 Selecting the output format of datasets . . . . . . . 73
4.9.4 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . 75
4.10 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
4.10.1 Resetting the system settings . . . . . . . . . . . . . . 76
4.10.2 Resetting the photometer settings . . . . . . . . . . . 77
4.10.3 Resetting the pH settings . . . . . . . . . . . . . . . . . . 77
4.11 Meter information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.12 Software update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.13 Administrating user-defined methods . . . . . . . . . . . . . . . 79
4.13.1 Administrating user-defined programs with a
terminal program . . . . . . . . . . . . . . . . . . . . . . . . 80
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 83
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
5.1.1 Inserting/exchanging the batteries . . . . . . . . . . . 83
5.1.2 Retrofitting the accumulator pack . . . . . . . . . . . 84
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
5.2.1 Cleaning the cell shaft . . . . . . . . . . . . . . . . . . . . 85
5.2.2 Cleaning the cells . . . . . . . . . . . . . . . . . . . . . . . 85
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.1 General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.2 Photometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.3 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.4 Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4
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pHotoFlex / pHotoFlex Turb Contents
7.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
7.1.1 pHotoFlex (Turb) . . . . . . . . . . . . . . . . . . . . . . . . 91
7.1.2 LabStation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.2 Photometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
7.3 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 94
7.4 Turbidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
8 Accessories, options . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8.1 WTW accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
8.1.1 Connection cable: . . . . . . . . . . . . . . . . . . . . . . . 95
8.2 Optional extensions of the pHotoFlex (Turb) . . . . . . . . . 97
9 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
10 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Appendix: Firmware update . . . . . . . . . . . . . . . . . . . . . . . 107
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Contents pHotoFlex / pHotoFlex Turb
6
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pHotoFlex / pHotoFlex Turb Overview
1Overview
1.1 General features
The compact pHotoFlex (Turb) handheld precision photometer enables you to carry out the following measurements quickly and reliably:
! Photometric measurements
– Concentration measurements
– Absorbance measurements
– Transmission measurements
! pH measurements
! Turbidity measurements (pHotoFlex Turb).
The pHotoFlex (Turb) handheld meter provides the maximum degree
of operating comfort, reliability and measuring certainty for all applications.
The proven MultiCal
®
calibration procedure supports you when calibrating for pH measurements and the AutoRead function enables precise pH measurements.
4
3
2
1
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1 Keypad
2 Display
3 Cell shaft
(folded out for a 16 mm cell to be inserted)
4 Socket field
7
Overview pHotoFlex / pHotoFlex Turb
Note
If you need further information or application notes, you can obtain the
following material from WTW:
! Application reports
! Primers
! Safety datasheets.
You will find information on available literature in the WTW catalog or
via the Internet.
1.2 Keypad
Key functions
.
Select the measuring mode
<M> (long keystroke):
– Photometry
– Turbidity
– pH & ORP
Select the measured parameter within a measuring mode
<M> (short keystroke):
– pH & ORP: pH, ORP
– Photometry:
Concentration, Absorbance, % Transmission
– Turbidity: no measured parameters selectable
Start calibration (measuring modes, pH & ORP,
Turbidity)
Start zero adjustment or blank value measurement using the Photometry \ Adjustment menu
(measuring mode, Photometry)
<CAL/ZERO>
8
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pHotoFlex / pHotoFlex Turb Overview
In the Photometry measuring mode: Select a pro-
gram for concentration measurement
<PROG>
Open menus / confirm entries /
start measurement
.
<START/ENTER>
Call up the Configuration menu
(all settings are made here)
<MENU>
In the Photometry measuring mode, measured
parameter, Concentration
:
switch over between available citation forms
<FORM>
In the Photometry measuring mode, measured
parameter, Concentration
:
Switch over between available units <UNIT>
Switch the measuring instrument on/off
<ON/OFF>
PRT
Output display contents to RS232 interface (e.g.
print)
<PRT>
Open the Store menu <STO>,
Quick storing <STO> <STO>
Highlight menu items or selection
Set values
<▲>, <▼>
Switch to the next higher menu level /
cancel input
<ESC>
Note
Keys with an additional number printed on are assigned doubly.
This enables to directly enter numbers in special menus. Thus, you
can, for example, conveniently enter the date and time via the number
keys.
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Overview pHotoFlex / pHotoFlex Turb
1.3 Display
The graphic display shows all information of the current measurement
in the measured value display. The illumination enables to read the display even in the darkness.
Example
Photometry \ Concentration
1.29
2: A5/25 MC NH4
16 mm 0.20 - 8.00 mg/l
01.02.05 15:12
mg/l
1.4 Socket field
-N
Measuring mode \ measured
parameter
Measured value (with unit)
Program and citation form
Diameter of the cell and
measuring range
Status line with date and time
10
Identifying the
connectors
12345
1 pH electrode
2 pH temperature sensor
3 Power pack
4 Contacts for operation on the LabStation
5 RS232 serial interface
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pHotoFlex / pHotoFlex Turb Overview
1.5 LabStation (optional)
With the LabStation, which is available as an accessory, you can conveniently use the pHotoFlex (Turb) in the laboratory.
Laboratory operation with the LabStation enables the following additional functions:
! With photometric measurements, the zero measurement is retained
even after switching the pHotoFlex (Turb) off and on again
! You can connect a barcode reader for the simplified calling up of
programs
! The LSdata software serves to easily enter user-defined programs
! Line power operation is possible to save the batteries or accumula-
tor pack
! The accumulator pack in the pHotoFlex (Turb) is automatically
charged as soon as the meter is placed in the LabStation.
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LabStation
Fig. 1-1 LabStation
11
Overview pHotoFlex / pHotoFlex Turb
12
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pHotoFlex / pHotoFlex Turb Safety
2 Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the meter.
Consequently, all responsible personnel must read this operating manual carefully before working with the meter. The operating manual must
always be available within the vicinity of the meter.
Target group The meter was developed for work in the field and in the laboratory.
We assume that, as a result of their professional training and experience, the operators will know the necessary safety precautions to take
when handling the chemicals of photometric test sets.
The personnel responsible for the commissioning, operation and maintenance must have the necessary qualifications for this work. If the personnel do not have the required skills they have to be instructed.
Furthermore, it must be ensured that the personnel read and completely understand the present operating manual.
Safety instructions The individual chapters of this operating manual use the following safe-
ty instructions to indicate various types of danger:
Caution
indicates instructions that must be followed precisely in order to
avoid the possibility of slight injuries or damage to the instrument
or the environment.
Further notes
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manuals.
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Safety pHotoFlex / pHotoFlex Turb
2.1 Authorized use
This meter is authorized exclusively for carrying out the following measurements in the field and laboratory:
! Analysis of substances in water and aqueous solutions
using round cells
! Concentration measurement
! Absorbance and transmission measurement
! Measurement of pH value and ORP
! Turbidity measurement (pHotoFlex Turb only).
The technical specifications as given in chapter 7 T
ECHNICAL DATA must
be observed. Only the operation and running of the meter according to
the instructions given in this operating manual is authorized. Any other
use is considered to be unauthorized.
2.2 General safety instructions
This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see chapter
7T
ECHNICAL DATA).
It left the factory in a safe and secure technical condition.
Opening the photometer or adjustment, maintenance and repair work
must only be performed by specialist personnel authorized by the manufacturer.
The only exceptions to this are the activities described in chapter
5M
AINTENANCE, CLEANING, DISPOSAL. Non-compliance results in the
loss of warranty claims.
Follow the points listed below when operating the photometer:
! Follow the local safety and accident prevention regulations
Function and operating
safety
14
! Observe the enclosed instructions of reagents and accessories
! Observe the regulations when dealing with dangerous substances
! Follow the operating instructions at the workplace
! Use only original spare parts.
The smooth functioning and operational safety of the meter can only be
guaranteed if the generally applicable safety measures and the specific
safety instructions in this operating manual are followed during operation.
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pHotoFlex / pHotoFlex Turb Safety
The smooth functioning and operational safety of the meter can only be
guaranteed under the environmental conditions that are specified in
chapter 7 T
ECHNICAL DATA.
If the instrument was transported from a cold environment to a warm
environment, the formation of condensate can lead to the faulty functioning of the instrument. In this event, wait until the temperature of the
instrument reaches room temperature before putting the instrument
back into operation.
Safe operation It is the responsibility of the operator to continuously observe the over-
all technical condition (externally recognizable deficits and damage as
well as alterations to the operational behavior) of the meter.
If safe operation is no longer possible, the instrument must be taken out
of service and secured against inadvertent operation!
Safe operation is no longer possible if the meter:
! has been damaged in transport
! has been stored under adverse conditions for a lengthy period of
time
! is visibly damaged
Obligations of the
operator
! no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
Caution
Danger of eye damage by visible and invisible LED radiation. In
the cell shaft there are light emitting diodes (LED) of the 1M class.
Do not look at the radiation using optical instruments.
With normal, authorized use there is no hazard.
The purchaser of this meter 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
! Safety datasheets of the chemical manufacturers.
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15
Safety pHotoFlex / pHotoFlex Turb
16
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pHotoFlex / pHotoFlex Turb Commissioning
3 Commissioning
3.1 Scope of delivery
! Handheld photometer, pHotoFlex Turb or pHotoFlex
! 4 batteries, 1.5 V type AA (in the battery compartment)
! Optional: Accumulator pack and power pack with Euro plug
and exchange plugs for USA, UK, and Australia
! Optional: LabStation
! 1 empty cell 16 mm
! 2 empty cells 28 mm
with label to mark the cell for turbidity measurements
! AMCO
! Microfiber cloth to clean the meter
! Compact operating manual and short operating manual
! CD-ROM with
®
-Clear turbidity standard (pHotoFlex Turb only)
Charging time of the
accumulator pack
– detailed operating manual
– photometry analysis manual with analysis specifications
– software to program user-defined methods
Note
The optional parts of the scope of delivery are available as accessories
(see section 8.1).
3.2 Power supply
You can operate the meter either with batteries, accumulator pack or a
power pack. The power pack supplies the meter with low voltage
(9 V DC). At the same time, the accumulator pack is charged. The accumulator pack is charged even while the meter is switched off.
The LoBat display indicator appears when the batteries or accumulator
pack is nearly discharged.
approx. 36 hours.
Caution
The line voltage at the operating site must lie within the input voltage range of the original power pack (see chapter 7 T
TA).
ECHNICAL DA-
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Caution
17
Commissioning pHotoFlex / pHotoFlex Turb
Use original power packs only (see chapter 7 TECHNICAL DATA).
Note
The accumulator pack should not be completely discharged. If you do
not operate the instrument for a longer period of time you should charge
the accumulator pack every six months.
Automatic switchoff The meter has an automatic switch-off function in order to save the bat-
teries or accumulator pack (see section 4.4).
Display illumination During operation with batteries or accumulator pack the meter automat-
ically switches off the display illumination if no key is pressed for
30 seconds. The illumination is switched on with the next keystroke
again. The display illumination can also be switched off completely (see
section 4.4.2).
Note
Power pack and accumulator pack are available as an accessory (see
section 8.1).
Connecting the power
pack (optional)
4
2
3
1
1 If necessary, replace the Euro plug (1) on the power pack (2)
by the country-specific plug suitable for your country.
2 Connect the plug (3) to the socket (4) of the photometer.
3 Connect the power pack to an easily accessible power socket.
18
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pHotoFlex / pHotoFlex Turb Commissioning
3.3 Connecting the LabStation
Note
The LabStation is available as an accessory (see section 8.1).
In order to use the functions of the LabStation for operation in the laboratory, connect the LabStation and place the pHotoFlex (Turb) in the
LabStation.
Connecting the LabSta-
tion (optional)
6
5
4
2
3
1
1 If necessary, replace the Euro plug (1) on the power pack (2)
by the country-specific plug suitable for your country.
2 Connect the plug (3) to the socket (4) of the LabStation.
3 Connect a PC, printer or barcode reader to the socket (5) of the
LabStation as necessary.
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Note
When the pHotoFlex (Turb) is operated in the LabStation, a barcode
reader can be connected. A barcode reader enables to select program
numbers in a simplified manner.
Recommended barcode readers can be found in section 8.2.
For the interface of your meter, set the same baud rate that is set for
the barcode reader (see section 4.4.3).
The baud rate of the barcode reader is given in the operating manual
of your barcode reader.
19
Commissioning pHotoFlex / pHotoFlex Turb
4 Connect the power pack to an easily accessible power socket.
5 Place the pHotoFlex (Turb) in the LabStation.
LabStation
6 Connect a pH electrode to the socket on the pHotoFlex (Turb)
through the cut-out (6) as necessary.
20
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pHotoFlex / pHotoFlex Turb Commissioning
3.4 Initial commissioning
Perform the following activities:
! For
– accumulator operation: insert the accumulator pack (see
section 5.1.2)
– line power operation and charging the accumulator pack: connect
the power pack (see section 3.2)
– operation with LabStation: connect the LabStation and place the
pHotoFlex (Turb) in the LabStation (see section 3.3)
! Switch on the meter (see section 4.1)
! Set the language as necessary (see section 4.3.3)
! Set the date and time as necessary (see section 4.3.4)
Note
When you set the language, date and time according to the mentioned
sections of this operating manual you will quickly become familiar with
the simple operation of the pHotoFlex (Turb).
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21
Commissioning pHotoFlex / pHotoFlex Turb
22
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pHotoFlex / pHotoFlex Turb Operation
4 Operation
4.1 Switching on the meter
Switching on Press the <ON/OFF> key.
For 30 seconds, Start menu appears with a selection of the measuring
modes. The measuring mode last selected is highlighted.
The status line indicates the meter designation and the version number
of the software.
Start
Photometry
Turbidity
pH & ORP
i pHotoFlex V 0.24
After a few seconds, the meter automatically switches to the measuring
mode and measured parameter used last.
The measured value display appears (here, e.g. measuring mode Pho-
tometry).
Photometry \ Concentration
i Select program
with <PROG>
01.02.05 15:12
With <M> (long pressure) change the measuring mode.
With <M> (short pressure) toggle between the different measured parameters in the selected measuring mode.
Switching off Press the <ON/OFF> key.
Automatic switchoff The meter has an automatic switchoff function in order to save the bat-
teries or accumulator pack (see section 4.4). The automatic switchoff
switches the meter off if no key is pressed for an adjustable period.
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The automatic switchoff is not active
! if the power is supplied by the power pack (optional),
! if the power is supplied by the LabStation (optional),
! if the Timer or Analysis timer function is on.
23
Operation pHotoFlex / pHotoFlex Turb
Display illumination
with battery and accu-
mulator pack operation
During operation with batteries or accumulator pack the meter automatically switches off the display illumination if no key is pressed for
30 seconds. The illumination is switched on again with the next keystroke.
4.2 Inserting a cell
To be able to insert cells in the pHotoFlex (Turb), the cell shaft has to
be prepared to take in a cell.
1 Push the dust cover (1) upward.
The cell shaft for 28 mm cells is open.
! Insert a 28 mm cell (see below)
! Insert a 16 mm cell (see page 25)
1
Inserting a 28 mm cell
2 Insert the cell so that it is positioned on the bottom of the cell
shaft.
The cell is ready to be measured.
3 For turbidity measurement:
Align the cell (see section 4.7.2).
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Inserting a 16 mm cell
1 Put the fold-out cell shaft (2) in an upright position until it locks
into place.
2
2 Pull up the height adapter (3).
The cell shaft is extended.
3
3 Open the external light cover (4) of the cell shaft.
4
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Operation pHotoFlex / pHotoFlex Turb
4 Insert the 16 mm cell (marking points forward) so that it is po-
sitioned on the bottom of the cell shaft.
5 Close the external light cover (4).
The cell is ready to be measured.
Note
For optimum measurement results, the cell must always be covered by
the external light cover. Otherwise, external light can falsify the measurement result.
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4.3 General operating principles
This section contains basic information on the operation of the
pHotoFlex (Turb).
Operating elements,
display
Operating modes,
navigation
An overview of the operating elements and the display is given in
section 1.2 and section 1.3.
An overview of the operating modes of the pHotoFlex (Turb) and the
navigation through menus and functions can be found in section 4.3.1
and section 4.3.2.
4.3.1 Operating modes
The instrument has the following operating modes:
! Measurement
The display indicates measurement data in the measured value display
! Calibration
The display indicates a calibration process with calibration information,
or a process to carry out a zero adjustment
! Data transmission
The meter transmits measuring datasets or calibration records to the
serial interface
! Configuration
The display indicates a menu with further menus, settings and functions
4.3.2 Navigation
Measured value display In the measured value display, you can
! select a measuring mode with <M> (long pressure)
! select a measured parameter in the active measuring mode (e. g.
pH <−> mV) with <M> (short pressure)
! open the menu with <MENU>
! switch to the superordinate Start menu with <ESC>.
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Operation pHotoFlex / pHotoFlex Turb
Menus and dialogs The menus for settings and dialogs in courses contain further sub-
menus. The selection is made with the <▲><▼> keys.
The current selection is displayed in reverse video.
! Menus
The name of the menu is displayed at the upper edge of the frame.
Menus are opened by confirming with <START/ENTER>. Example:
Configuration
Photometry
Turbidity
pH & ORP
System
Info
! Settings
Settings are indicated by a colon. The current setting is displayed on
the right-hand side. With <START/ENTER>, the selection of the
possible settings is opened. Subsequently, the setting can be
changed with <▲><▼> and <START/ENTER>.
Example:
System
Language: Deutsch
Beep:
Illumination
Contrast
Temperature unit
Switchoff time
: On
:
:
:
Off
48 %
°C
30 min
! Functions
Functions are designated by the name of the function. They are immediately carried out by confirming with <START/ENTER>.
Example: display the Calibration record function
(in the pH & ORP / Calibration menu).
pH & ORP
Calibration record
Cal. type: AutoCal
TEC
Calibration interval
Unit for slope
:i 2.00 4.01 7.00 10.01
:
:
007 d
mV/pH
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! Messages
Information or instructions are marked by the i symbol. They can-
not be selected.
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Example:
pH & ORP
i Buffer recognition TEC
i Immerse sensor in buffer 1
The i symbol indicates
info texts, e.g.
messages, notes or instructions
Set temperature: 25 °C
Continue
Note
The principles of navigation are explained in the two following sections
by reference of examples:
! Setting the language (section 4.3.3)
! Setting the date and time (section 4.3.4).
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Operation pHotoFlex / pHotoFlex Turb
4.3.3 Navigation example 1: Setting the language
Note
The following example describes in the language of the country how to
set the language. On delivery, English is set as the language in the
pHotoFlex (Turb). During initial commissioning, the language is set in
the menu, Configuration / System / Language.
1 In the measured value display:
Open the Configuration menu with <MENU>.
The instrument is in the configuration mode.
2 Select the System menu with <▲><▼>.
The current selection is displayed in reverse video.
3 Open the System menu with <START/ENTER>.
4 Select the Language menu with <▲><▼>.
The current selection is displayed in reverse video.
System
Language: Deutsch
Store
Display
Reset
Interface
Continue ...
5 Open the setting of the Language with <START/ENTER>.
System
Language:
Store
Display
Reset
Interface
Continue ...
Deutsch
6 Select the required language with <▲><▼>.
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7 Confirm the setting with <START/ENTER>.
The setting is active. The menu is displayed in the selected language.
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