Metrohm 827pH User Manual
826 pH mobile / 827 pH lab
Manual
8.827.8001EN
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
826 pH mobile / 827 pH lab
Program version 5.826.0011 and 5.827.0011
8.827.8001EN
Manual
12.2010 jb/ebe
Teachware
Metrohm AG
CH-9100 Herisau
teachware@metrohm.com
This documentation is protected by copyright. All rights reserved.
Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.
Documentation in additional languages can be found on
http://documents.metrohm.com.
Contents
Table of contents
1 Introduction .......................................................... 1
1.1 Instrument description ................................................................................. 1
1.2
Parts and controls ........................................................................................ 2
1.3
Information about these Instructions for Use ............................................. 4
1.3.1
Notation and pictograms ......................................................................... 4
1.4
Safety information ........................................................................................ 5
1.4.1
Electrical safety ........................................................................................ 5
1.4.2
General handling rules ............................................................................. 5
2 Installation ........................................................... 7
2.1 Instrument setup .......................................................................................... 7
2.1.1
Packaging ................................................................................................. 7
2.1.2
Checks ...................................................................................................... 7
2.1.3
Location .................................................................................................... 7
2.2
Inserting the batteries at 826 pH mobile ..................................................... 7
2.3
Connecting the electrodes and sensors ..................................................... 7
2.4
Mains connection ......................................................................................... 8
2.5
Switch on ...................................................................................................... 8
2.6
Connecting a printer .................................................................................... 9
2.7
Initial configuration ...................................................................................... 9
3 Operation ........................................................... 11
3.1 Operating concept ..................................................................................... 11
3.2
All key functions at a glance ...................................................................... 12
3.3
Operating principles .................................................................................. 14
3.3.1
Configuration and method parameters .................................................14
3.3.2
Editing menu entries ..............................................................................14
3.3.3
Entering text and numbers .....................................................................15
4 Short operating tutorial ..................................... 17
4.1 Requirements ............................................................................................. 17
4.2
pH calibration ............................................................................................. 17
4.3
pH measurement ........................................................................................ 19
5 Configuration ..................................................... 21
5.1 Report ......................................................................................................... 21
5.2
Printing out measured values .................................................................... 22
5.3
Storing measured values ........................................................................... 25
5.4
Auxiliaries ................................................................................................... 26
6 Methods / Parameters ....................................... 29
6.1 pH measurement (pH mode) ..................................................................... 29
6.1.1
Measuring parameters ...........................................................................29
6.1.2
Calibration parameters ...........................................................................30
6.1.3
Limits ......................................................................................................32
6.1.4
pH calibration data .................................................................................33
826/827 pH meter, Instructions for Use I
Contents
6.2 Temperature measurement (T mode) ........................................................ 34
6.3
Potential measurement (U mode) .............................................................. 34
7 Various functions ............................................... 35
7.1 Reports ....................................................................................................... 35
7.1.1
Arrangement of a report ......................................................................... 36
7.1.2
Report identification ............................................................................... 36
7.1.3
Measuring point report ........................................................................... 37
7.1.4
Calibration report ................................................................................... 37
7.1.5
Configuration report ............................................................................... 37
7.1.6
Parameter report .................................................................................... 38
7.1.7
Measured values memory report ........................................................... 38
7.1.8
PC/LIMS report ....................................................................................... 38
7.1.9
System test report .................................................................................. 39
7.2
Measured values memory .......................................................................... 40
7.2.1
Store measured values .......................................................................... 40
7.2.2
Print measured values ........................................................................... 40
7.2.3
Show measured values .......................................................................... 40
7.3
Setup .......................................................................................................... 42
7.3.1
Locking ................................................................................................... 42
8 Troubleshooting – Messages – Maintenance ..... 43
8.1 Troubleshooting ......................................................................................... 43
8.2
Messages ................................................................................................... 45
8.3
Diagnosis ................................................................................................... 47
8.4
Maintenance ............................................................................................... 49
8.4.1
Changing the batteries (826 only) ......................................................... 49
8.4.2
Changing the batteries (827 only) ......................................................... 50
9 Appendix ............................................................. 51
9.1 Technical data ............................................................................................ 51
9.1.1
Measuring modes .................................................................................. 51
9.1.2
Measuring inputs .................................................................................... 51
9.1.3
Measuring input specifications .............................................................. 52
9.1.4
Measured values memory ..................................................................... 52
9.1.5
Display .................................................................................................... 52
9.1.6
Interfaces ................................................................................................ 52
9.1.7
Power supply .......................................................................................... 52
9.1.8
Housing specifications ........................................................................... 52
9.1.9
Safety specifications .............................................................................. 53
9.1.10
Electromagnetic compatibility (EMC) .................................................... 53
9.1.11
Ambient temperature ............................................................................. 53
9.1.12
Reference conditions ............................................................................. 53
9.1.13 Dimensions ............................................................................................ 53
9.2
Menu structures ......................................................................................... 55
9.2.1
Instrument configuration ........................................................................ 55
9.2.2
Parameters in the pH mode ................................................................... 56
9.2.3
Parameters in the T mode ...................................................................... 56
9.2.4
Parameters in the U mode ..................................................................... 56
9.3
Stored buffer series ................................................................................... 57
II 826/827 pH meter, Instructions for Use
Contents
9.4 Scope of delivery ....................................................................................... 62
9.4.1
826 pH mobile ........................................................................................62
9.4.2
Optional accessories for 826 pH mobile ...............................................65
9.4.3
827 pH lab ..............................................................................................65
9.4.4
Optional accessories for 827 pH lab .....................................................67
9.5
Warranty and conformity ........................................................................... 68
9.5.1
Warranty ..................................................................................................68
9.5.2
Declaration of Conformity ......................................................................69
9.5.3
Declaration of Conformity ......................................................................70
9.5.4
Quality Management Principles .............................................................71
10 Index ................................................................... 73
826/827 pH meter, Instructions for Use III
Contents
List of illustrations
Fig. 1: pH meter 827 .................................................................................................................. 1
Fig. 2: Front view of the 827 pH lab
Fig. 3: Rear view of the 827 pH lab
Fig. 4: Connecting sensors
Fig. 5: Changing the batteries for the 826 pH mobile
Fig. 6: Changing the batteries for the 827 pH lab
........................................................................................... 2
........................................................................................... 3
........................................................................................................ 8
............................................................. 49
................................................................... 50
IV 826/827 pH meter, Instructions for Use
1 Introduction
1 Introduction
These instructions provide you with a comprehensive overview of the
installation, working principles and operation of the 826 pH mobile and
827 pH lab.
Additional theoretical principles can be found in the Metrohm Monograph 8.015.5013 "Electrodes in Potentiometry".
You can also request our descriptions of applications involving pH
measurements in the form of Application Notes and Application Bul-
letins from your local Metrohm agency or download them from the Internet under www.metrohm.com.
Fig. 1: pH meter 827
1.1 Instrument description
Both instrument versions, the portable 826 pH mobile and the laboratory device 827 pH lab, are used for measuring pH, temperature and
potential reliably. The functional range is identical. The pH meter 826
pH mobile is operated with batteries whereas the 827 pH lab has got
an external power supply.
Up to 200 values can be stored in the memory together with the most
important additional data; these can be viewed and printed as a report.
All stored information (measured values, configuration, parameters,
etc.) can be transmitted via the infrared interface to a printer or computer for output as a report.
826/827 pH meter, Instructions for Use 1
1.2 Parts and controls
1
3
2
Both instruments have the following features:
• Dot-matrix display for both the continuous display of the measured
value and for showing the user dialog.
• High-impedance measuring input for pH, redox or ISE sensors, a
connection for a separate reference electrode and an input for temperature sensors (NTC or Pt1000).
• Infrared interface for a infrared printer.
1.2 Parts and controls
Fig. 2: Front view of the 827 pH lab
LCD display
On/Off key
Key for switching the instrument on and
off
2 826/827 pH meter, Instructions for Use
Input and navigation keys
Menu selection, text and number input
1 Introduction
4
7
5
8
6
Fig. 3: Rear view of the 827 pH lab
Connection for potentiometric electrodes
pH, ISE, redox or silver electrodes
with built-in or separate reference electrode; socket type F
Connection for separate reference
electrode
for connection with two 2 mm B-plugs;
the adapter 6.2103.180 or 6.2103.190
is necessary with 4 mm banana plugs
Connection for temperature sensor
Pt1000 or NTC, for connection with two
2 mm B-plugs; the adapters
6.2103.180 and 6.2103.190 are necessary with 4 mm banana plugs; red plug
in socket "Temp."!
Infrared interface
Connection for printer or PC with infrared interface
6 V power connection
with 827 pH lab only
826/827 pH meter, Instructions for Use 3
1.3 Information about these Instructions for Use
4
1.3 Information about these Instructions for Use
Attention!
Please study these instructions carefully before you start to use the
instrument. The instructions contain information and warnings that
must be observed by the user in order to guarantee the safe use of
the instrument.
1.3.1 Notation and pictograms
The following notations and pictograms (symbols) are used in these instructions:
Parameter Menu item, parameter or input value
<< config >> Menu
<OK> Key
Operating element
Danger
This symbol indicates a possible risk of death
or injury if the given information is not properly
observed.
Warning
This symbol indicates a possible risk of damage to the instrument or its components if the
given information is not properly observed.
Attention
This symbol indicates important information.
Please read it carefully before you continue.
Information
This symbol indicates additional information
and tips.
4 826/827 pH meter, Instructions for Use
1 Introduction
When working with water or other solutions in the immediate vicinity of
1.4 Safety information
Warning!
This instrument should only be used in accordance with the information given in these installation instructions.
1.4.1 Electrical safety
Please observe the following guidelines:
• Only qualified Metrohm technicians should carry out service work
on electronic components.
• Open the housing only in order to change the batteries. There are
no components inside the housing that the user can service or exchange. The changing of the batteries is described in Section 8.4.
Electrical safety when handling the pH meter is guaranteed within the
framework of the IEC 61010-1 Standard. The following points must be
observed:
Danger!
Please make sure that the external power supply is always kept dry.
Protect it against direct liquid contact.
Warning!
Electronic components are sensitive to electrostatic charges and can
be destroyed by a discharge. Always switch off the pH meter before
making or breaking electrical connections on the rear panel of the instrument.
1.4.2 General handling rules
Handling solutions
Warning!
the pH meter please avoid excessive liquid splashes on the instrument housing or power supply. Any such splashes must be removed
as quickly as possible in order to prevent the liquid from entering the
instrument or the power supply.
Do not clean the plexiglass display with organic solvents like e. g.
acetone.
826/827 pH meter, Instructions for Use 5
1.4 Safety information
6 826/827 pH meter, Instructions for Use
2 Installation
2 Installation
2.1 Instrument setup
2.1.1 Packaging
The 826/827 pH meter and its specially packed accessories are supplied in very protective special packaging. Please store this packaging
in a safe place; it is the only way in which the safe transport of the instrument can be guaranteed.
2.1.2 Checks
Please check that the delivery is complete and undamaged immediately on receipt (compare with delivery note and list of accessories given in
Section 9.4).
2.1.3 Location
Place the instrument on a suitable vibration-free laboratory bench, protected from corrosive atmospheres and contact with chemicals.
2.2 Inserting the batteries at 826 pH mobile
The 826 pH mobile is delivered without inserted batteries. Inserting the
batteries is described in Section 8.4.1.
2.3 Connecting the electrodes and sensors
On its rear panel the 826/827 pH meter has connections for a potentiometric electrode
ture sensor
Connect your electrodes and sensors according to the following diagram to the switched off pH meter:
6.
4, a separate reference electrode 5 and a tempera-
826/827 pH meter, Instructions for Use 7
2.4 Mains connection
4
5
6
Please make sure that the power supply is always kept dry. Protect it
Fig. 4: Connecting sensors
Connection for potentiometric electrodes
pH, ISE, redox or silver electrodes with built-in or separate
reference electrode; plug F
Connection for separate reference electrode
Connection for temperature sensor
Pt1000 or NTC, connected via two 2 mm banana plugs, reducing adapters for 4 mm plug B may be necessary
(6.2103.180 / 6.2103.190). Please observe: The red plug must
be put in the socket "Temp." for shielding purposes!
2.4 Mains connection
The 827 pH lab has an external power supply providing 6 V (DC). This
is connected to 6 V mains connection
The following power supply units are available:
• 6.2161.010 power supply unit EU 230 V / 6 V DC
• 6.2161.020 power supply unit US 115 V/ 6 V DC
• 6.2161.030 power supply unit UK 230 V / 6 V DC
• 6.2161.040 power supply unit AUS 240 V / 6 V DC
Attention!
against direct liquid contact.
2.5 Switch on
Switch on the pH meter with the < > key. The instrument will start in
the last operating mode to have been used for measuring pH, temperature or potential.
During the switch-on process an instrument checking routine is carried
out automatically. If an error message is displayed here ('Err x') then
please contact your local Metrohm agency.
8.
8 826/827 pH meter, Instructions for Use
2 Installation
2.6 Connecting a printer
A printer with an infrared interface can be connected to the infrared interface for printing out reports.
Activate the infrared interface of the pH meter under
configuration/auxil/IR interface: (see Section 5.4)
No further transmission parameters need to be set.
Attention!
In order to guarantee a perfect transmission the distance between the
pH meter and the printer should be 80 cm at the maximum. The infrared interfaces must face each other directly. Never expose the infrared interface to direct sunlight.
2.7 Initial configuration
The pH meter is delivered with standard settings for the configuration. If
it should ever be necessary to reset the configuration of the instrument
to its original condition then this can be carried out by a re-initialization
of the instrument memory (see Section 8.3).
Before you start to make measurements please change the following
configuration settings. If you first want to make yourself familiar with the
operation of the pH meter then please read Sections 3.1 to 3.3. More
detailed explanations of the individual configuration settings are given
in Section 5.
Date and time
configuration/auxil/date
and /time
Please check that the date and time are correct.
Temperature sensor
configuration/auxil/temp.sens.
Enter the type of temperature sensor that is connected. If no temperature sensor is connected and you always want to enter the measuring
temperature manually then you can ignore this setting.
826/827 pH meter, Instructions for Use 9
2.7 Initial configuration
10 826/827 pH meter, Instructions for Use
3 Operation
3 Operation
3.1 Operating concept
The pH meter provides two types of display:
1. The measured value display.
This is the normal instrument display.
2. The menu display
This is used for editing various settings.
In the measured value display the current measured value is shown
together with the method of the temperature measurement (only for
mode pH) and the date and time (only for modes U and T) respectively.
The measured value display changes when the operating mode of the
pH meter is changed with <OK> in the menu << pH/°C/mV >>. You
can easily see which mode is set from the measuring unit or the prefix
"pH" shown in the display.
826/827 pH meter, Instructions for Use 11
3.2 All key functions at a glance
The menu is being changed with the
3.2 All key functions at a glance
The functions of all the keys are described below both for the measured
value display and the menu display:
Key Measured value display Menu display
On/Off
• The < > key switches the instru-
ment on and off.
• After switching-on the pH meter is in
the initial state of the last mode to
have been used.
Starting calibration
• The <CAL> key starts the pH cali-
bration (in mode pH only).
Acknowledging messages
• Displayed messages are normally
acknowledged with <QUIT> (Exceptions: see Section 8.2).
• If the cause of the message has not
been remedied, then it will appear
again at the next check.
Menu selection
•
arrow keys <> and <>.
On/Off
• The < > key switches the instru-
ment off at any time.
Canceling working step
• In menus <QUIT> causes a jump
to the next higher level without accepting the alterations.
Selecting predefined entries
• For menu parameters which offer a
fixed choice of settings (recognizable by the final colon) the selection
list can be viewed with the arrow
keys. The arrow determines the selection direction.
Cursor control for text input
• The cursor is moved to that position
which needs to be altered.
12 826/827 pH meter, Instructions for Use
3 Operation
>
> keys can be used to move the
ured
tered value will be
Key Measured value display Menu display
Altering display contrast
• The contrast of the LCD display can
be altered with the arrow keys <
and <> during the measured value display.
• This setting is retained after the in-
strument has been switched off and
on. The default value is only reset after the memory has been initialized.
Controlling the menu bar
• In each menu display the <> und
<
selection bar up and down by one
line.
Cursor control for text input
• The character to be entered is se-
lected with the arrow keys and entered with <OK>.
Leafing through the measured value
memory
• Leafing through between the entries
in the measured value memory display: starting from the last meas
value having been stored you can
access older entries with <
> and
vice versa.
Calibration
• The calibration sequence is contin-
ued with <OK>.
• The calibration data are accepted
with <OK> in case they are out of
the defined limits.
Confirming entry
• The <OK> key is used to complete
each entry with the selection bar
moving on to the next parameter. If
an entry is exited without this confirmation then the en
rejected.
826/827 pH meter, Instructions for Use 13
3.3 Operating principles
3.3 Operating principles
3.3.1 Configuration and method parameters
Instrument configuration and parameters for the pH mode (no adjustable parameters are required for the measuring modes U (mV) and T
(°C)) are each contained in menus with a tree structure. These menu
structures are shown in the appendix in Section 9.2.
The instrument configuration of the pH meter is described in the menu
<< config >>. This contains the basic settings that apply for all measuring modes. The parameters for the pH mode are stored in the menu
<< param >>.
The change from the measured value display to the menu display is
made by selecting the corresponding menu and confirming with the
<OK> key. The title of the submenu appears first, and is shown with
an '>' (e. g. >report). You can now move the selection bar up and
down with the <
menu structure is opened with <OK> and exited with <QUIT>. Alterations to individual entries must be confirmed with <OK>. If such alterations are exited with <QUIT> then they remain ineffective.
> and <> arrow keys. Each underlying level in the
If an entry is confirmed with <OK> then the selection bar will move to
the next entry. At the end of a submenu it will finally change to the next
point of the superior menu selection.
In this way you can run through the complete menu structure for the
configuration and parameters by repeatedly pressing the <OK> key.
This can be helpful when carrying out checks.
Not all parts of the menu structure described below are visible in the
display at all times. Only the specific possible settings of the option
which is currently activated are shown. For example, the various settings for printing under configuration/print/print crit. are not vis-
ible when printing has been deactivated completely (off). If one of the
other printing criteria is selected then the particular settings it requires
will appear in the display.
3.3.2 Editing menu entries
A basic differentiation is made between two types of menu entry.
Entries with a fixed selection are indicated by a colon:
print crit.: immed., time, drift, change, off
The selection is then made with the arrow keys and confirmed with
<OK>.
Entries which can be edited are altered by entering a new value and
confirming it with <OK>.
14 826/827 pH meter, Instructions for Use
3 Operation
3.3.3 Entering text and numbers
The editing of text and number inputs is activated with the <> or
> key. The first digit of the entry field will be displayed inverted for
<
text entries whereas it is the last digit for number entries. The cursor can
be moved to the position to be changed with the <
The desired character can be selected from a cylinder with the <> or
> keys. The cursor movement can be accelerated by keeping the
<
arrow keys pressed down.
The following characters can be selected:
• For ASCII entry fields:
a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, 0, 1, 2,
3, 4, 5, 6, 7, 8, 9, ., –, empty
• For number entry fields:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ., –, empty
The entry is checked for validity and accepted if it is valid. Otherwise the
entered value is blinking and it can be corrected. If a space has been
entered between two numbers of a number entry, the display is blinking
as well. The value can be corrected then or the original value is entered
by pressing <QUIT>. The editing can be exited with <QUIT> without
storing the setting.
> or <> key.
826/827 pH meter, Instructions for Use 15
3.3 Operating principles
16 826/827 pH meter, Instructions for Use
4 Short operating tutorial
and confirm with
4 Short operating tutorial
In this section the necessary steps for carrying out a simple pH and ion
measurement with calibration are described. The instructions are limited to those steps that are absolutely necessary and will enable you
to carry out your first measurements with the pH meter directly. The operating principles are described in Section 3.3.
4.1 Requirements
The following instruments, accessories and solutions are required for
carrying out the pH calibration and measurement described below:
• 826 pH mobile (2.826.0XX0) or 827 pH lab (2.827.011X,
2.827.021X)
• pH electrode
• Calibration buffers
Metrohm buffer solutions pH 4.00 and pH 7.00
The calibration parameters for the pH mode are set for a calibration using two Metrohm buffers as default (see Section 6.1.2). If you want to
use other buffers then the corresponding buffer type must be entered.
4.2 pH calibration
1 Start calibration with first buffer
• Start calibration with <CAL>
• Immerse pH electrode in buffer solution pH 7
<OK>
• If a temperature sensor is connected, the calibration tempera-
ture is being determined
• If no temperature sensor is connected:
enter the temperature with the arrow keys and confirm with
<OK>
• The first buffer is being measured
• The following message is displayed after successful mea-
surement:
2 Continue calibration with second buffer
• Remove pH electrode from first buffer and rinse with water
• Immerse pH electrode in second buffer solution pH 4 and
continue calibration sequence with <OK>
• The second buffer is being measured
change buffer <OK>
826/827 pH meter, Instructions for Use 17
Loading...