Metrohm 824 User Manual
CH-9101 Herisau/Switzerland
E-Mail info@metrohm.com
Internet www.metrohm.com
824 Easy Sample Changer
Program version 5.824.0010
Instructions for Use
8.824.1003 08.2002/ dm
Contents
Teachware
Metrohm AG
Oberdorfstr. 68
CH-9101 Herisau
teachware@metrohm.com
1st Edition 2002
These instructions are protected by copyright. All rights reserved.
Although all the information given in these instructions has been checked with great
care, errors cannot be entirely excluded. Should you notice any mistakes please
inform the author at the address given above.
© Metrohm Ltd. 2002
Printed in Switzerland
II 824 Easy Sample Changer, Contents
Contents
Table of contents
1 Introduction ..................................................1
1.1 Instrument description...................................................................... 1
1.1.1 Two versions ............................................................................... 1
1.2 Information about these Instructions for Use ................................ 3
1.3 Parts and controls ............................................................................. 4
1.3.1 The keypad ................................................................................. 4
1.3.2 Individual parts and standard accessories ................................5
1.4 Safety information ............................................................................. 7
1.4.1 General:....................................................................................... 7
1.4.2 Electrical safety ........................................................................... 7
2 Installation.................................................... 8
2.1 Instrument setup ............................................................................... 9
2.1.1 Packaging ................................................................................... 9
2.1.2 Checks ........................................................................................ 9
2.1.3 Location ...................................................................................... 9
2.2 Mains connection .............................................................................. 9
2.3 Keyboard connection...................................................................... 10
2.4 Attaching and equipping a titration head ..................................... 11
2.4.1 Attaching and equipping the KF titration head ........................ 12
2.4.2 Attaching the splash protector ................................................. 13
2.4.3 741 Magnetic Stirrer.................................................................. 13
2.5 Attaching the 759 Swing Head ....................................................... 14
2.5.1 Procedure.................................................................................. 14
2.6 Connecting devices to the Remote socket................................... 15
2.6.1 Remote connections................................................................. 15
2.7 Serial connection (RS232) .............................................................. 18
2.8 Sample racks ................................................................................... 19
2.8.1 Positioning a sample rack ........................................................ 20
3 Operation ....................................................21
3.1 The <SELECT> key.......................................................................... 21
3.2 Settings............................................................................................. 22
3.2.1 Setting the working position of the lift....................................... 22
3.2.2 Setting the rinsing position of the lift......................................... 22
3.2.3 Setting the shifting position of the lift........................................ 23
3.2.4 Setting the stirrer rate................................................................ 23
3.3 Manual operation............................................................................. 24
3.3.1 Moving the lift............................................................................ 24
3.3.2 Rotating the sample rack.......................................................... 24
3.3.3 Switching the stirrer on/off ........................................................ 24
3.3.4 Operating the pumps................................................................ 24
3.4 Automatic operation........................................................................ 25
3.4.1 Preparing a sample series........................................................ 25
3.4.2 Method selection ...................................................................... 25
3.4.3 Starting a method ..................................................................... 25
3.4.4 Interrupting a method run ......................................................... 26
3.4.5 Canceling a method run ........................................................... 26
824 Easy Sample Changer, Contents III
Contents
3.5 Functions of the LEDs..................................................................... 27
3.5.1 The Status LED ......................................................................... 27
3.5.2 The [SELECT] LEDs ................................................................. 27
3.5.3 LEDs 1 to 4 ............................................................................... 27
4 Standard methods ......................................29
4.1 Information about the methods...................................................... 29
4.2 Method labels ................................................................................... 30
4.3 Method 1 ........................................................................................... 30
4.4 Method 2 ........................................................................................... 31
4.5 Method 3 ........................................................................................... 32
4.6 Method 4 ........................................................................................... 33
4.6.1 Editing methods........................................................................ 34
5 Maintenance information ...........................35
5.1 Maintenance / Service ..................................................................... 35
5.2 Care / Maintenance .......................................................................... 35
6 GLP validation.............................................36
7 Troubleshooting .......................................... 37
7.1 Error messages................................................................................ 37
8 Annex...........................................................39
8.1 Technical data.................................................................................. 39
8.1.1 Interfaces .................................................................................. 39
8.1.2 Pump connections.................................................................... 39
8.1.3 Lift ............................................................................................. 39
8.1.4 Turntable................................................................................... 39
8.1.5 Stirrer......................................................................................... 39
8.1.6 Power supply ............................................................................ 40
8.1.7 Safety Specifications ................................................................ 40
8.1.8 Electromagnetic compatibility (EMC)....................................... 40
8.1.9 Ambient temperature................................................................ 40
8.1.10 Dimensions and materials........................................................ 41
8.2 Method listings................................................................................. 42
8.2.1 Method 1................................................................................... 42
8.2.2 Method 2................................................................................... 43
8.2.3 Method 3................................................................................... 44
8.2.4 Method 4................................................................................... 45
8.3 Connecting external pumps ...........................................................46
8.4 Connecting rinsing and aspirating equipment............................. 47
8.4.1 Attaching the distributor and tubing......................................... 47
8.4.2 Spray nozzles ........................................................................... 47
8.4.3 Aspiration tip............................................................................. 49
8.5 Sample beakers for Karl Fischer titrations ................................... 49
8.6 Standard equipment ........................................................................ 50
8.6.1 824 Easy Sample Changer....................................................... 50
IV 824 Easy Sample Changer, Contents
Contents
8.7 Optional accessories ...................................................................... 53
8.7.1 6.5610.020 KFT Equipment...................................................... 53
8.7.2 772 Pump Unit (2.772.0020)..................................................... 54
8.7.3 772 Pump Unit (2.772.0030)..................................................... 56
8.7.4 Optional accessories and instruments..................................... 57
8.7.5 Connection cables.................................................................... 57
8.7.6 Sample racks and sample beakers.......................................... 58
8.7.7 Electrodes for Sample Changers ............................................. 59
8.8 Warranty and conformity................................................................ 60
8.8.1 Warranty .................................................................................... 60
8.8.2 EU Declaration of Conformity for 824 Easy Sample Changer . 61
8.8.3 Declaration of Conformity: 824 Easy Sample Changer ...........62
Index............................................................ 63
List of illustrations
Fig. 1 Keypad ....................................................................................................................... 4
Fig. 2 Side view of 824 Easy Sample Changer .................................................................... 5
Fig. 3 Rear view .................................................................................................................... 6
Fig. 4 824 Easy Sample Changer – peripheral devices ....................................................... 8
Fig. 5 Fuse holder............................................................................................................... 10
Fig. 6 Rear panel of instrument .......................................................................................... 10
Fig. 7 Macro-titration head ................................................................................................. 11
Fig. 8 Micro-titration head .................................................................................................. 11
Fig. 9 KF Titration head ...................................................................................................... 12
Fig. 10 Attaching the splash protector ................................................................................. 13
Fig. 11 Attaching the magnetic stirrer .................................................................................. 13
Fig. 12 Attaching the 759 Swing Head................................................................................. 14
Fig. 13 Connecting a 7xx Titrino ........................................................................................... 15
Fig. 14 Connecting an 8xx Titrando...................................................................................... 16
Fig. 15 Connecting a Titrino and Dosimat............................................................................ 16
Fig. 16 Connecting a 780/781 pH Meter .............................................................................. 17
Fig. 17 Connecting the 759 Swing Head ............................................................................. 17
Fig. 18 Connecting a computer............................................................................................ 18
Fig. 19 Attaching a sample rack........................................................................................... 20
Fig. 20 6.2142.010 Keypad for sample changer ................................................................. 34
Fig. 21 Pump connections ................................................................................................... 46
Fig. 22 Distributor ................................................................................................................. 47
Fig. 23 Attaching the spray nozzles and the aspiration tip .................................................. 48
Fig. 24 Titration head with aspiration and rinsing equipment .............................................. 48
Fig. 25 Function of the spray nozzles................................................................................... 48
Fig. 26 Karl Fischer sample beaker...................................................................................... 49
824 Easy Sample Changer, Contents V
1.1 Instrument description
1 Introduction
The Metrohm 824 Easy Sample Changer is an instrument for numerous
applications. It was specially developed for the industrial or analytical
laboratory and therefore covers a wide spectrum of applications. It provides indispensable support when processing a large sample series
throughout the whole titration sector, for various measurement jobs, or
for other analytical purposes.
Due to the well-developed communication interfaces (parallel remote
control and serial RS 232), not only can it communicate with the large
range of Metrohm titration and dosing instruments but it can also control or be controlled by a personal computer. For this purpose Metrohm
offers the versatile Tinet titration software. These capabilities predestine
it for all conceivable automation jobs in a modern laboratory, even in
conjunction with highly integrated laboratory data systems.
1.1 Instrument description
The greatest advantage of the 824 Easy Sample Changer lies in its very
easy user operation. For carrying out simple applications the predefined standard methods may be used without any modifications being
needed. The simple keyboard allows the use of all the functions used in
the daily routine tasks of the 824 Easy Sample Changer.
1.1.1 Two versions
The 824 Easy Sample Changer is supplied in two different versions.
Macro-version
The 2.824.0010 version includes a complete set of accessories for
working with the supplied macro-titration head to process large- to medium-size sample vessels.
Micro-version
The 2.824.0020 version includes a complete set of accessories for
working with the supplied micro-titration head to process smaller sample vessels.
Both versions are supplied with a sample rack and suitable sample
vessels as standard. A particularly suitable set of KFT equipment can
be ordered for carrying out Karl Fischer titrations with the 824 Easy
Sample Changer.
Pump control
For rinsing the electrodes and for aspiration of the sample solutions either one or two peristaltic pumps can be connected directly to the 824
Easy Sample Changer. The Metrohm 772 Pump Unit is also available in
versions with accessories for aspiration or rinsing.
824 Easy Sample Changer, Introduction 1
1.1 Instrument description
Standard sample racks
Exchangeable standard sample racks are available for a wide range of
different sized vessels. Each rack has a predefined "special beaker" position. This is used for placing a rinsing or conditioning beaker on the
rack. In this way, for example, it is possible to condition or rinse an electrode after each titration.
Standard methods
The predefined standard methods of the 824 Easy Sample Changer not
only have an optimized sample processing sequence but also have
both a start sequence and a final sequence which are carried out before and after a series of samples respectively.
759 Swing Head
For processing a larger number of samples the 759 Swing Head can be
installed on the sample changer. This drive is used instead of the standard titration head and can, for example, be fitted with a titration head
for direct titration in the sample vessels. By using the 759 Swing Head it
is possible to use multi-row sample racks and therefore to process larger numbers of samples within a very short time.
The basis
The 824 Easy Sample Changer was developed on the basis of the timeproven Metrohm 730 Sample Changer and therefore offers the possibility of the free definition of run sequences, method parameters and rack
data throughout a very wide range. This requires the use of the
“6.21.42.010 SC Controller” Sample changer keypad.
2 824 Easy Sample Changer, Introduction
1.2 Information about these Instructions for Use
1.2 Information about these Instructions for Use
Please read through these Instructions for Use before you start to use
the 824 Easy Sample Changer.
The following notations and pictograms are used in these instructions:
35 Operating element
The operating elements are explained on
pages 4ff.
Danger
This symbol indicates a possible risk of
death or injury to the user and possible
damage to the instrument or its components by electricity.
Danger/Warning
This symbol indicates a possible risk of
death or injury to the user and possible
damage to the instrument or its components.
Attention
This symbol indicates important information. Read the information provided before
you continue.
Information
This symbol indicates additional information
and tips which may be of particular use to
you.
824 Easy Sample Changer, Introduction 3
1.3 Parts and controls
1.3 Parts and controls
1.3.1 The keypad
1 Status LED
Easy Controller
SELECT
Method
PUMP/STIR
Config
Methods
1 ________________________
2 ________________________
3 ________________________
4 ________________________
STIR 1
PUMP 1 PUMP 2
STIR 2
Met ro h m
Status
2
3
4
5
6
2 SELECT LEDs
Indicate the user mode
3 LEDs 1 to 4
• Method selection
• Stirrer/Pump status
• Configuration steps
• Error display
4 Labeling field for methods
5 Arrow key up / Stirrer 1
• Lift up
• Method selection
• Stirrer 1 on/off
• Sets lift position and stirrer rate
6 Arrow key right / Pump 2
• Rotates rack clockwise
• Pump 2 on/off
• Next configuration step
7 Arrow key down / Stirrer 2
HOLD STOP
6.2142.110
9
Fig. 1 Keypad
RESETSELECT
10
START
11
7
8
• Lift down
• Method selection
• Stirrer 2 on/off
• Sets lift position and stirrer rate
8 Arrow key left / Pump 1
• Rotates rack counterclockwise
• Pump 1 on/off
• Previous configuration step
9 User mode / Interrupt method /
Acknowledge error message
10 Initialize changer / Cancel method
11 Start method / Continue method
4 824 Easy Sample Changer, Introduction
1.3 Parts and controls
1.3.2 Individual parts and standard accessories
12
14
13
The 824 Easy Sample
Changer must not be
operated without the
splash protector 13 and
connections cover 17 in
position.
18
15
19
20
16
17
Fig. 2 Side view of 824 Easy Sample Changer
12 Tubing guide 16 Mains switch and fuse holder
13 Splash protector 6.2751.010 17 Connections cover 6.2752.010
14 Lift 18 Tower
15 Sample rack e. g. 6.2041.310 19 Remote interface
20 Stirrer connection
824 Easy Sample Changer, Introduction 5
1.3 Parts and controls
21
Ext.
Ext.
Pump 1
Pump 2
22
16 V
16 V
max. 300 mA
max. 300 mA
25
Line sleeve
21
Pump connectors
22
Manufacturing number
23
RS 232 Keybo ard
Made by Metrohm Herisau Switzerland
Fig. 3 Rear view
24
25
Type 1.824.0010 Nr.
0010/01104
Keyboard connector
RS232 connector
23
24
6 824 Easy Sample Changer, Introduction
1.4 Safety information
1.4 Safety information
Warning!
This instrument should only be used in accordance with the information
given in these Instructions for Use.
1.4.1 General:
This instrument left our works in perfect condition from the point of view
of its operational safety (see Technical data, safety specification). To
keep it in this condition and to continue to operate safely the following
information must be carefully observed.
1.4.2 Electrical safety
Please observe the following guidelines:
• Only qualified Metrohm personnel should carry out service work on
electronic components.
• Do not open the instrument housing as this could damage the in-
strument. The housing contains no components which could be
serviced or exchanged by the user.
Electrical safety when handling the instrument is guaranteed within the
scope of Standard IEC 61010-1. However, please observe the following
point:
Protection against electrostatic charges
Warning!
Electronic components are sensitive to electrostatic charges and can
be destroyed by a discharge. Always remove the mains connection
cable from socket 12 before making or breaking electrical connections
on the rear panel of the instrument.
Connection to the electricity supply:
This instrument must only be operated at the specified mains voltage.
Repair and maintenance:
If faults or malfunctions occur while using the 824 Easy Sample
Changer we recommended that you first check that the connection to
the control instrument has been made correctly.
The instrument must not be opened. This is reserved exclusively for
authorized service personnel.
824 Easy Sample Changer, Introduction 7
1.4 Safety information
2 Installation
This section describes the things you should pay attention to when unpacking and starting up the 824 Easy Sample Changer. It also tells you
how a complete automation system is built up.
The following illustration provides an overview of the peripheral devices
which can be attached to an 824 Easy Sample Changer:
691
780
692
781
712
713
665
725
765
775
776
Personal Computer
759 Swing Head
RS232
772 Pump Unit
pH Meter / Ion meter
Conductometer
Dosimat
722/802 Rod stirrer
741 Magnetic stirrer
824 Easy Sample Changer
Remote
Remote Box MSB
731 Relay Box
Fig. 4 824 Easy Sample Changer – peripheral devices
7xx
Titrino
family
808/809
Titrando
8 824 Easy Sample Changer, Installation
2.1 Instrument setup
2.1 Instrument setup
2.1.1 Packaging
The 824 Easy Sample Changer 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 8.6). If transport damage is evident please refer to the
information given in Section 8.8.1 ''Warranty'.
2.1.3 Location
The 824 Easy Sample Changer has been developed for indoors use
and must not be used in explosion-endangered surroundings.
Place the instrument on a suitable vibration-free laboratory bench, protected as much as possible from corrosive atmospheres and contamination by chemicals.
Select a location in which the ambient temperature is normally between
+5 °C and +45 °C. The instrument should be protected against excessive variations in temperature and direct sunshine.
If an instrument which has been stored under cold conditions is
brought into a warm room then the atmospheric humidity may condense inside the instrument and form water. In order to avoid damaging
the instrument please wait for at least one hour before switching it on.
2.2 Mains connection
Please observe the following rules when connecting the instrument to
the electricity supply. If the instrument is operated with an incorrectly set
mains voltage and/or an incorrect mains fuse then it represents a fire
hazard!
Setting the mains voltage
Before you switch on the 824 Easy Sample Changer for the first time
please check that the mains voltage set on the instrument (see illustration on the following page) corresponds to your local mains voltage. If
this is not the case then you must alter the mains voltage as follows:
824 Easy Sample Changer, Installation 9
2.3 Keyboard connection
• Pull out mains cable
Remove the mains cable from the mains supply connection of the 824
Easy Sample Changer.
• Remove the fuse holder
Use a screwdriver to loosen the fuse holder beside the mains supply
connection and remove it completely.
• Check the fuse and replace it
Carefully remove the built-in fuse for the intended voltage from the fuse
holder and check its specifications (the position of the fuse in the fuse
holder is indicated by the white arrow beside the voltage range):
100…120 V 0.5 A (slow blow) Metrohm-No. U.600.0014
220…240 V 0.25 A (slow blow) Metrohm No. U.600.0011
• Insert fuse
Exchange the fuse if necessary and replace it in the fuse holder.
• Insert fuse holder
Depending on the required mains voltage, insert the fuse holder so that
the white arrow of the corresponding voltage range points to the white
bar; this is to the right of the fuse holder (see below).
220 – 240 V
100
-
120 V
240 V
-
220
100 – 120 V
220
-
240 V
120 V
-
100
Fig. 5 Fuse holder
Mains switch
Mains connection
Fuse holder
• Attach connections cover
Position the connections cover in the guide rail above the connections
strip. The connections cover protects the connections from spilt chemicals.
2.3 Keyboard connection
Type 1.824.0010 Nr.
RS 232 Keyboard
Made by Metrohm Herisau Switzerland
Fig. 6 Rear panel of instrument
10 824 Easy Sample Changer, Installation
0010/01104
The keyboard is attached to the connection 24
provided for it on the rear panel of the instrument. To
remove the connection press both sides of it together.
2.4 Attaching and equipping a titration head
2.4 Attaching and equipping a titration head
Macro-titration head
6.1458.010
Attachment screws
SGJ14 Sleeve
SGJ9 Guiding sleeve
Propeller stirrer
Fig. 7 Macro-titration
Note about the Macro-titration head
Micro-titration head
Electrode
Buret tip
Rod stirrer
2.802.0020
6.1236.020
Screw nipple
4.658.0180
6.2709.070
6.1909.020
head
6.1458.020
Fig. 8 Micro-titration head
Only special micro-electrodes
can be used with the microtitration head; see list of
accessories, p. 46.
The SGJ14 opening marked by an arrow is bored at a slight angle so that a rod stirrer or an
electrode can be centered in narrow titration vessels.
824 Easy Sample Changer, Installation 11
2.4 Attaching and equipping a titration head
A
2.4.1 Attaching and equipping the KF titration head
KFT Titration head
6.1458.030
ttachment screws
Double Pt-electrode
6.0340.000
Buret tips
6.1543.200
Screw nipple
4.658.0180
O-Rings
E.301.0022
O-Ring (below)
E.301.0080
Fig. 9 KF Titration head
Note:
In order to ensure an optimal seal of the titration vessel the M10 threads
should be inserted into the titration head together with the O-rings.
12 824 Easy Sample Changer, Installation
2.4 Attaching and equipping a titration head
When attaching the tubing and cable connections these should be led
from the titration head through the tubing guide in order not to restrict
the range of movement of the lift. Take care that the tubing is long
enough to accommodate the whole range of movement of the lift.
2.4.2 Attaching the splash protector
For safety reasons the 824 Easy Sample Changer should not be operated unless the splash protector is in its proper position.
13
Fig. 10 Attaching the splash protector
2.4.3 741 Magnetic Stirrer
Fig. 11 Attaching the magnetic stirrer
26
• On both sides of the tower loosen knurled nuts
26.
• Slip the slot-shaped openings of the splash
protector 13 over the attachment screws and
tighten up knurled nuts 26 again.
• If the knurled nuts 26 are loosened slightly it is
easy to adjust the height of the splash protector
13.
Apart from the micro-titration head, the
2.824.020 version also includes a 741 Magnetic
Stirrer.
The use of the 741 Magnetic Stirrer is particularly
recommended for Karl Fischer titrations.
The 2.741.0010 Magnetic Stirrer can be attached
to the tower by using the holder (6.2034.020)
and supplied screws as shown in the drawing
alongside.
824 Easy Sample Changer, Installation 13
2.5 Attaching the 759 Swing Head
2.5 Attaching the 759 Swing Head
In order to accurately move to the individual sample vessels when multirow sample racks are used (see p. 19), the 759 Swing Head can be
used instead of a normal titration head. It is equipped with either a titration head (Model 2.759.0020) or with a transfer head (Model
2.759.0010).
The 759 Swing Head with titration head can be used with the 2-row
sample rack M48-1. The swing head version with the transfer head is intended for use with the 3-row sample racks M128-2, M129-2 and M142-
2.
2.5.1 Procedure
• Switch off instrument.
12
• Remove the titration head 14 by loosening the four screws on both
the outer sides of the lift.
14
Loosen
759 Swing
Head
Fig. 12
Attaching the 759
Swing Head
• Screw off the tubing guide from the titration head 14.
• Attach the new titration head (6.1462.020) or the transfer head
(6.1462.010) to the bottom of the swing head by using the three
screws provided.
• Screw the tubing guide 12 onto the new titration or transfer head.
• Attach new titration or transfer head to the lift and fasten it with the
four screws.
• Connect the 759 Swing Head to the Remote socket 19 of the 824
Easy Sample Changer, see also p. 17.
• Place a multi-row sample rack on the turntable of the sample
changer.
• Switch on instrument.
• If the swing head moves when the instrument is switched on then
this means that it has been recognized by the 824 Easy Sample
Changer and is ready for use.
• If the swing head does not move when the instrument is switched on
then switch the instrument off and then on again.
14 824 Easy Sample Changer, Installation
2.6 Connecting devices to the Remote socket
2.6 Connecting devices to the Remote socket
Connection cable
If the 824 Easy Sample Changer is to be connected to other devices
then only Metrohm cables should be used as these are the only cables
that guarantee perfect data transfer.
Note:
The Remote cable for the 824 Easy Sample Changer have a marking at
each end which indicates the instrument for which the particular end is
intended to be used and the connection to which it is to be connected.
Example (standard Remote cable):
Titrino B
692 / 712 / 713
Before peripheral devices are connected the sample changer must be
switched off as otherwise the instruments could be damaged.
2.6.1 Remote connections
Sample changer — Titrino
with standard cable
824
Fig. 13 Connecting a 7xx Titrino
Cable 6.2141.020
B
A
Titrino
C
D
824 Easy Sample Changer, Installation 15
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