Metrohm 824 User Manual

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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

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.

II 824 Easy Sample Changer, Contents

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

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

1.3.1 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 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

Fig. 1 Keypad

RESETSELECT

START

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

The 824 Easy Sample Changer must not be operated without the splash protector 13 and connections cover 17 in position.

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

Ext.

Pump 1

Pump 2

16 V

max. 300 mA

Line sleeve

Pump connectors

Manufacturing number

RS 232 Keybo ard

Made by Metrohm Herisau Switzerland

Fig. 3 Rear view

Type 1.824.0010 Nr.

0010/01104

Keyboard connector

RS232 connector

6 824 Easy Sample Changer, Introduction

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

2.1.1 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

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

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.

Fig. 10 Attaching the splash protector

2.4.3 741 Magnetic Stirrer

Fig. 11 Attaching the magnetic stirrer

• 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

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-

2.5.1 Procedure

• Switch off instrument.

• Remove the titration head 14 by loosening the four screws on both

the outer sides of the lift.

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

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

Titrino

824 Easy Sample Changer, Installation 15

2.6 Connecting devices to the Remote socket

Sample changer — Titrando

with standard cable and 6.2148.010 Remote Box

Remote box

6.2148.010

MSB 3

MSB 1

MSB 4

MSB 1

824

MSB

808 / 809 Titrando

6.2141.020 Cable

Fig. 14 Connecting an 8xx Titrando

Sample changer — Titrino — 765/776 Dosimat

Titri no

824

6.2141.040 Cable

665

Fig. 15 Connecting a Titrino and Dosimat

16 824 Easy Sample Changer, Installation

2.6 Connecting devices to the Remote socket

Sample changer — 780/781 pH-Meter

with standard cable and 6.2148.010 Remote box

Remote box

6.2148.010

824

6.2141.020 Cable

MSB

Fig. 16 Connecting a 780/781 pH Meter

Sample changer with 759 Swing Head

824

Connecting further devices via Remote cables

Fig. 17 Connecting the 759 Swing Head

The swing head is connected to the Remote interface of the 824 Easy Sample Changer. The connection of the 759 Swing Head allows the connection of further devices via Remote lines; 4 lines (Input 7 and Output 11–13) are occupied by the swing head. These four lines are not led any further through the connection.

824 Easy Sample Changer, Installation 17

2.7 Serial connection (RS232)

A personal computer can be connected to the serial RS232 interface

25. In this way the 824 Easy Sample Changer can be remotely controlled (in the same way as the Metrohm 730 Sample Changer), provided that a suitable software such as Tinet 2.5 is installed.

824

Fig. 18 Connecting a computer

A requirement for correct data transfer is that the transmission parameters are correctly set; these must correspond to the settings at the interface of the connected device.

The standard transmission parameters for the 824 Easy Sample Changer are:

Baud Rate: 9600 Baud Data Bit. 8 Stop Bit: 1 Parity: none Handshake: HWs

Cable 6.2125.060 (25p/25p) oder 6.2125.110 (25p/9p)

18 824 Easy Sample Changer, Installation

2.8 Sample racks

A sample rack is a turntable which accommodates sample vessels and which is placed on the sample changer. As in titrations or measurements various sizes of sample vessels are normal or necessary, different types of easily exchangeable sample racks can be used. The number of sample vessels which can be accommodated on a sample rack depends on their diameters. When used with the 824 Easy Sample Changer the highest rack position is intended to be used for a special beaker for rinsing or conditioning/dipping.

Metrohm supplies the following standard sample racks:

Type No. of

samples M12-0 12 250 mL Metrohm titration beaker 000001 6.2041.310 M16-0 16 150 mL beaker 000010 6.2041.320 M24-0 24 75 mL Metrohm titration beaker 001000 6.2041.340 M12-0 12 150 mL beaker or

M14-0 14 200 mL disposable beaker (Euro) 000011 6.2041.370 M14-0 14 8 oz disposable beaker (US) 000101 6.2041.380 M16-0 16 120 mL disposable beaker (US) 100001 6.2041.390

Sample racks for use with the 759 Swing Head:

M48-1 48 * 75 mL Metrohm titration beaker 010000 6.2041.350

M128-2 128 15 mL test tubes+

M142-2 142 15 mL test tubes +

M129-2 129 11 mL test tubes +

*Special beaker at position 24

Type of sample vessel Predefined

magnet code

100000 6.2041.360

200 mL disposable beaker (Euro)

000110 6.2041.400

2 x 250 mL titration beaker

001010 6.2041.410

1 x 500 mL beaker

010001 6.2041.430

2 x 300 mL beaker

Ordering

number.

Each sample rack is unambiguously identified by a magnet code. Magnetic pins, attached to the base of the rack, provide a 6-place binary code. This means that the magnet sensor can automatically recognize the rack that is attached when the first beaker position is in front of the tower.

824 Easy Sample Changer, Installation 19

2.8 Sample racks

2.8.1 Positioning a sample rack

After a sample rack has been positioned the sample changer must be initialized with <RESET> so that the

Magnet holder

Magnet sensor

magnet code of the rack can be read in. This makes the unambiguous recognition of the rack possible and therefore the correct positioning of the beakers.

Fig. 19 Attaching a sample rack

20 824 Easy Sample Changer, Installation

3.1 The <SELECT> key

3 Operation

This section contains the basic principles for using the 824 Easy Sample Changer.

As well as processing a series of samples automatically, the 824 Easy Sample Changer can also be operated manually in order, for example, to rinse the electrode in a special beaker during the preparation of a series of samples.

In order to load methods or use functions which are not available in the normal operating status the <SELECT> key must be activated.

3.1 The <SELECT> key

SELECT

HOLD

The <SELECT> key is used to switch between the different operating levels of the 824 Easy Sample Changer. Each pressure on the key

SELECT

Met ho d

PUMP/STIR

Conf ig

SELECT

Met hod

PUMP/STIR

Conf ig

SELECT

Met ho d

PUMP/STIR

Conf ig

SELECT

Met ho d

PUMP/STIR

Conf ig

switches from one mode to the next. The LEDs (see left) indicate the selected mode.

The individual modes and their functions are as follows:

• Normal operating mode

o Controls the lift and the sample rack. o Starts a method.

• Method selection

o Selects one of four predefined basic methods or modified meth-

ods

• Pump and stirrer control

o Switches two external pumps on/off o Switches stirrer 1 and 2 on/off

• Sample changer settings

o Sets the lift working height o Sets the rinsing height of the lift o Sets the shifting position of the lift o Sets the stirring rate

SELECT

Met ho d

PUMP/STIR

Conf ig

<SELECT> returns to the normal operating mode.

824 Easy Sample Changer, Operation 21

3.2 Settings

In order to be able to work comfortably with the 824 Easy Sample Changer a few settings must first be made.

• The various lift settings depend on the rack used; this means that

they must be made for each sample rack according to the size of the sample vessels used.

• The stirrer rate is method-specific and is stored in the active method.

If you use different methods then the stirrer speed must be optimized separately for each method.

HOLD

SELECT

Met ho d

PUMP/STIR

Conf ig

Place a sample rack on the turntable and press <STOP/RESET>. Place a filled sample beaker at the rack position in front of the lift in order to make the following settings.

Press the <SELECT> key three times.

The SELECT LEDs show that the 824 Easy Sample Changer is now in the configuration mode.

You can now use the <Í> and <Î> keys to switch between the four possible settings in this mode.

3.2.1 Setting the working position of the lift

STIR 1

STIR 2

The lift with the titration head can be easily moved up and down with the <Ï> and <Ð> keys respectively.

Set the working height of the lift so that the electrode is immersed and the stirrer can work efficiently.

Accept/ continue with <Î>.

3.2.2 Setting the rinsing position of the lift

STIR 1

STIR 2

The lift with the titration head can be easily moved up and down with the <Ï> and <Ð> keys respectively.

If standard method 4 is used then the rinsing position of the lift is required for aspirating the used sample. Set the rinsing position of the lift so that the sample vessel can be emptied completely. A rinsing position which is lower than the working height can be selected. The mounting position of the aspiration tubing can be selected as required.

Accept/ continue with <Î>.

22 824 Easy Sample Changer, Operation

3.2 Settings

3.2.3 Setting the shifting position of the lift

STIR 1

STIR 2

The lift with the titration head can be easily moved up and down with the <Ï> and <Ð> keys respectively.

Set the shift height of the lift so that the sample rack can rotate freely. The electrode must fully emerge from the sample beaker.

Accept/ continue with <Î>.

3.2.4 Setting the stirrer rate

STIR 1

STIR 2

The stirrer rate (applies to both stirrer outputs) can be easily increased or reduced in 15 steps with the <Ï> and <Ð> keys respectively.

The standard setting is step 3.

Accept/ continue with <Î>.

824 Easy Sample Changer, Operation 23

3.3 Manual operation

When it has been switched on the 824 Easy Sample Changer is in the normal operating mode. The most important functions for manual operation can be carried out by pressing a key.

3.3.1 Moving the lift

In normal operating mode

STIR 1

STIR 2

The lift with the titration head can be easily moved up and down with the <Ï> and <Ð> keys respectively.

Please note that the lift must be located above a valid rack position. If, because of a possible mechanical influence, the rack is no longer in its correct position then press the <RESET/STOP> key.

3.3.2 Rotating the sample rack

In normal operating mode

PUMP 1

PUMP 2

The sample rack can be rotated counterclockwise with the <Í> key and clockwise with the <Î> key.

For safety reasons the lift must be at or above the set rotating position when the rack is rotated, so first move the lift upward or press the <RESET/STOP> key.

3.3.3 Switching the stirrer on/off

2x <SELECT>

STIR 1

STIR 2

After the <SELECT> key has been pressed twice the <STIR 1> and <STIR 2> keys can be used to switch the stirrers on and off. The

stirring rate of both stirrers can first be set under 'SELECT / Config’, see below.

LEDs LED 1 and LED 2 show the status of stirrer connections 1 and 2 respectively (LED lit up = on).

3.3.4 Operating the pumps

2x <SELECT>

PUMP 1

PUMP 2

After the <SELECT> key has been pressed twice the pump connections 1 and 2 (each ±16 V) can be switched on and off with the <PUMP 1> and <PUMP 2> keys respectively.

LEDs LED 3 and LED 4 show the status of pump connections 1 and 2 respectively (LED lit up = on).

24 824 Easy Sample Changer, Operation

3.4 Automatic operation

3.4.1 Preparing a sample series

• Prepare all the samples to be processed. Select the sample vessel

size according to your type of sample rack. The setting for the predefined lift position must be matched to the size of your sample vessels.

• Place the sample vessels on the rack. Start with rack position 1.

• Do not forget to place a rinsing/conditioning beaker at the highest

rack position. Most sample changer methods require a special beaker, see method description p. 29ff.

In order to process a series of samples a suitable method must first be loaded, see below.

3.4.2 Method selection

1x <SELECT>

STIR 1

3x <SELECT>

STIR 2

After pressing the <SELECT> key a method can be selected by using the <Ð> and <Ï> keys. Four predefined simple standard methods are available (Methods 1,2,3 and 4).

LEDs LED 1 to 4 show the selected method. The selected method is accepted with <SELECT>.

Return to the normal operating mode with 2x <SELECT>.

3.4.3 Starting a method

A method is started with the <START> key.

START

• When a method is started the sample changer is first initialized, i.e.

the lift is moved upward as far as it will go and the sample rack is moved to the starting position. The magnet code of the rack is read in and the corresponding rack table, in which the beaker positions on the rack are defined, is loaded.

• While the method is running the status LED blinks slowly (once per

second).

• After the start of the method the starting sequence is carried out

once. This contains commands for preparing for a series of samples.

• When all rack positions have been processed the final sequence is

carried out.

824 Easy Sample Changer, Operation 25

3.4 Automatic operation

3.4.4 Interrupting a method run

SELECT

HOLD

Press the <HOLD> key to briefly interrupt a method run.

• In the HOLD condition the status LED blinks more quickly.

• The run can be continued from the same position by pressing the

<START> key.

3.4.5 Canceling a method run

RESET

STOP

A method run is canceled with the <STOP> key.

• The sample changer switches back to the normal operating mode.

The status LED lights up permanently.

• After the manual cancelation of a method the final sequence is not

carried out.

26 824 Easy Sample Changer, Operation

3.5 Functions of the LEDs

The 824 Easy Sample Changer has several green LEDs (LED) which indicate the status of the instrument.

3.5.1 The Status LED

Status

Status LED 1 shows the complete status of the sample changer.

The LED lights up… when the 824 Easy Sample Changer is in the normal operating

mode.

The LED does not light up… when a fault has occurred.

The LED blinks slowly… while a method is running.

The LED blinks quickly… when the 824 Easy Sample Changer is in the HOLD condition. An

interrupted method can be continued with <START> or canceled with <STOP>.

3.5.2 The [SELECT] LEDs

SELECT

Met ho d

PUMP/STIR

Conf ig

’Method’ LED lights up… during the selection of a method.

‘PUMP/STIR’ LED lights up … when the external pumps and stirrers are being operated

‘Config’ LED lights up … when setting the lift positions and the stirrer rate.

The LEDs in the [SELECT] field indicate the status when the settings are changed.

manually.

3.5.3 LEDs 1 to 4

Depending on the instrument mode, LEDs 1 to 4 have different functions.

In the normal operating mode

Shows the active method.

During method selection

Shows the method to be loaded from the method memory.

824 Easy Sample Changer, Operation 27

3.5 Functions of the LEDs

During manual operation

Shows the switching status of the pumps and stirrers.

LED 1 : lights up when Stirrer 1 is running LED 2 : lights up when Stirrer 2 is running LED 3 : lights up when Pump 1 is running LED 4 : lights up when Pump 2 is running

During the configuration of the sample changer settings

Shows the possible settings.

LED 1 : lights up when setting the working position of the lift LED 2 : lights up when setting the rinsing position of the lift LED 3 : lights up when setting the shifting position of the lift LED 4 : lights up when setting the stirrer rate

28 824 Easy Sample Changer, Operation

4.1 Information about the methods

4 Standard methods

On delivery the 824 Easy Sample Changer already contains four optimized standard methods for processing series of samples. Simple titration tasks can be carried out with these methods without having to make complicated settings.

4.1 Information about the methods

The Metrohm sample changer methods consist of three different sequences for different purposes and a series of specific settings. Sequences are made up of a series of individual commands with which the functions of the sample changer can be programmed. For example, the command 'LIFT 1 work' causes the Lift 1 of a sample changer to move to the predefined working height.

Metrohm sample changer methods differentiate between three different sequences:

• Start sequence

The start sequence is carried out once at the start of a series of samples.

• Sample sequence

The sample sequence is carried out once for each sample.

• Final sequence

The final sequence is carried out once at the end of a series of samples.

Series operating

number of samples

<START>

start sequence final sequence

The number of samples is limited only by the capacity of the sample rack. In principle, in the standard methods of the 824 Easy Sample Changer all the positions of a sample rack are processed. Empty rack positions are automatically jumped over.

The standard methods of the 824 Easy Sample Changer can be used with all Metrohm standard sample racks. In all these methods the highest (last) rack position is used for a rinsing or conditioning beaker. Make sure that a sufficiently large vessel is always placed in this position.

824 Easy Sample Changer, Standard methods 29

sample sequence

normal state

4.2 Method labels

On the keyboard covering film you will find a gray marking field with 4 lines. You can enter a short description for each of the four sample changer methods. Use a soft pencil or waterproof marker for the labels. When choosing a marker make sure that the writing can easily be wiped off with alcohol. Pencil markings can be removed with a soft rubber.

A brief description of the standard methods of the 824 Easy Sample Changer is given below.

4.3 Method 1

Use:

For simple titrations (including KF titrations) or pH measurements (without calibration). The initial addition of auxiliary reagents or solvents is possible.

Required instruments:

• Metrohm titrator (Titrino or Titrando) or pH meter

• Metrohm Dosimat (optional)

• Metrohm 802 Rod Stirrer or 741 Magnetic Stirrer

Features:

No electrode rinsing after sample processing. The electrode is immersed in the conditioning beaker at the end of a series of samples.

Preparation:

Fill a sufficiently large conditioning vessel with a suitable solvent and place it in the highest rack position.

Procedure:

• (Start sequence) Initialize the sample changer

• Move to sample and lower lift to working position

• Switch on stirrer

• If a Dosimat is connected (optional): add auxiliary reagent or sol-

vent and wait until addition is completed

• Start titration/measurement and wait until it is completed

• Switch off stirrer

• Move lift to rotating position and allow electrode to drip

• (Final sequence) Move to conditioning beaker and immerse elec-

trode

30 824 Easy Sample Changer, Standard methods

4.4 Method 2

Use:

For simple titrations (including KF titrations) or pH measurements (without calibration). The initial addition of auxiliary reagents or solvents is possible.

Required instruments:

Features:

After each determination the electrode is briefly immersed in the conditioning beaker (dipping). The direction of the rack rotation is controlled so that samples which have not yet been processed are not contaminated by drops falling from the electrode.

Preparation:

Fill a sufficiently large conditioning vessel with a suitable solvent and place it in the highest rack position.

Procedure:

• Metrohm titrator (Titrino or Titrando) or pH meter

• Metrohm Dosimat (optional)

• Metrohm 802 Rod Stirrer or 741 Magnetic Stirrer

• (Start sequence) Initialize the sample changer

• Move to sample and lower lift to working position

• Switch on stirrer

• If a Dosimat is connected (optional): add auxiliary reagent or sol-

vent and wait until addition is completed

• Start titration/measurement and wait until it is completed

• Switch off stirrer

• Move lift to rotating position and allow electrode to drip

• Move to conditioning beaker in front of the tower and immerse

electrode

• Stir 5 seconds

• Move lift to rotating position and allow electrode to drip

• (Final sequence) Move to conditioning beaker and immerse elec-

trode

824 Easy Sample Changer, Standard methods 31

4.5 Method 3

Use:

For simple titrations (including KF titrations) or pH measurements (without calibration). The initial addition of auxiliary reagents or solvents is possible.

Required instruments:

• Metrohm titrator (Titrino or Titrando) or pH meter

• Metrohm Dosimat (optional)

• Metrohm 802 Rod Stirrer or 741 Magnetic Stirrer

• External pump (e.g. Metrohm 772 Pump Unit)

Features:

After each determination the electrode is rinsed in the sample vessel using a pump and spray nozzle. A separate spraying height must be defined for the rack.

Preparation:

Fill a sufficiently large conditioning vessel with a suitable solvent and place it in the highest rack position.

Procedure:

• (Start sequence) Initialize the sample changer

• Move to sample and lower lift to working position

• Switch on stirrer

• If a Dosimat is connected (optional): add auxiliary reagent or sol-

vent and wait until addition is completed

• Start titration/measurement and wait until it is completed

• Switch off stirrer

• Move lift to rinsing position and allow electrode to drip

• Rinse electrode for 3 seconds

• Move lift to rotating position and allow electrode to drip

• (Final sequence) Move to conditioning beaker and immerse elec-

trode

32 824 Easy Sample Changer, Standard methods

4.6 Method 4

Use:

For simple titrations (including KF titrations) or pH measurements (without calibration). The initial addition of auxiliary reagents or solvents is possible.

Required instruments:

Features:

After each determination the sample vessel is emptied by Pump 1 and then the electrode is rinsed by Pump 2. The sample vessel is then emptied again by Pump 1.

Preparation:

Fill a sufficiently large conditioning vessel with a suitable solvent and place it in the highest rack position.

Procedure:

• Metrohm titrator (Titrino or Titrando) or pH meter

• Metrohm Dosimat (optional)

• Metrohm 722/802 Rod Stirrer or 741 Magnetic Stirrer

• 2 external pumps (e.g. Metrohm 772 Pump Unit; Pump 1 for rins-

ing, Pump 2 for aspirating

• (Start sequence) Initialize the sample changer

• Move to sample and lower lift to working position

• Switch on stirrer

• If a Dosimat is connected (optional): add auxiliary reagent or sol-

vent and wait until addition is completed

• Start titration/measurement and wait until it is completed

• Switch off stirrer

• Move lift to rinsing position and empty sample vessel

• Rinse electrode and empty sample vessel again

• Move lift to rotating position and allow electrode to drip

• (Final sequence) Move to conditioning beaker and immerse elec-

trode

824 Easy Sample Changer, Standard methods 33

4.6 Method 4

4.6.1 Editing methods

The preinstalled standard methods of the 824 Easy Sample Changer are suitable for most simple measuring and titration tasks. The open method concept of this universal sample changer also allows adaptation of the standard methods, other methods to be loaded (e.g. Metrohm 730 Sample Changer methods) or completely new method sequences to be created.

By using the "6.2142.010 SC Controller" sample changer keypad, which has a 2-line display and 30 keys, it is possible to edit all the settings of the 824 Easy Sample Changer in detail and to create, edit and save methods in an easy way. This keypad can be obtained from Metrohm under the

Fig. 20 6.2142.010 Keypad for

sample changer

Ordering No. 6.2142.010 and can be connected to the 824 Easy Sample Changer instead of the conventional keypad.

Information

How to create sample changer methods is described in the Instructions for Use of the Metrohm 730 Sample Changer (Ordering No.

8.730.1101).

Note

If edited methods are later to be loaded by using the conventional keypad of the 824 Easy Sample Changer then they must be saved under the method names 1, 2, 3 or 4.

34 824 Easy Sample Changer, Standard methods

5.1 Maintenance / Service

5 Maintenance information

5.1 Maintenance / Service

The maintenance of the 824 Easy Sample Changer should take place within the framework of an annual service carried out by trained Metrohm technicians. If harsh and corrosive chemicals are frequently used then shorter maintenance intervals are necessary. The Metrohm Service Department will provide competent advice about the care and maintenance of all Metrohm instruments.

5.2 Care / Maintenance

Not only highly sensitive measuring instruments but also sample changers need adequate care. Excessive contamination of the instrument could interfere with its functions and reduce the working life of the really robust mechanism and electronics of the sample changer.

Excessive contamination of the titration head can influence the results obtained. This can largely be prevented by cleaning the exposed parts regularly.

Spilt chemicals and solvents should be removed immediately. The connections strip (and the mains connection in particular) should be protected against contamination. Never use the sample changer without the connections cover and splash protector in position.

Although the design prevents liquid penetration to a great extent, if aggressive media should enter the housing then pull out the mains plug immediately, in order to prevent massive damage to the instrument’s electronics. In such a case please contact your distributor's service department.

Warning

The instrument must not be opened by untrained personnel!

824 Easy Sample Changer, Maintenance information 35

5.2 Care / Maintenance

6 GLP validation

Each Metrohm instrument undergoes a rigorous quality control process before dispatch.

GLP (Good Laboratory Practice) requires, among other things, that the precision and correctness of analytical instruments is checked at regular intervals by using SOPs (Standard Operating Procedure, SOP).

As this instrument is not an analytical instrument as such, we recommend the user to include the 824 Easy Sample Changer as part of an analytical system in its all-embracing validation. If the sample changer is primarily used for titrations then the validation of the titrator is best carried out by using the sample changer. In this way any interference (e.g. carryover of titrant or sample solution), which could influence the results obtained, in included within the framework of the evaluation of the complete titration system.

Checking the electronic and mechanical assemblies of Metrohm instruments can and should be undertaken within the framework of regular servicing by Metrohm technicians. All Metrohm instruments are equipped with start-up check routines which check that the relevant assemblies are functioning perfectly when the instrument is switched on. If no error message appears it can be assumed that the instrument is functioning properly. Metrohm also supplies the instruments with built-in diagnosis programs which allow the service technicians to check the functioning of particular assemblies should faults or malfunctions occur and to localize them.

Recommended literature

• Metrohm booklets "Quality management with Metrohm"; detailed in-

formation about the principles and methods of Good Laboratory Practice

• Metrohm Application Bulletin 252/1 "Validation of Metrohm titrators

according to GLP/ISO 9001"

36 824 Easy Sample Changer, GLP validation

7.1 Error messages

7 Troubleshooting

7.1 Error messages

If a fault or error occurs then LEDs 1 to 4 start to blink in particular combinations (binary error code). The status LED goes out.

SELECT

HOLD

<START>

<STOP>

LED 1…4 Description / Remedy

Instrument error messages (blinking LEDs 1…4) must be acknowledged with the <HOLD> key. The 824 Easy Sample Changer then enters the HOLD mode. When the fault has been remedied then the run can be continued with the <START> key or canceled with the <STOP> key.

Error 1:

Error 2:

Error 3:

Error 4:

Beaker missing

After a rack rotation no beaker is found at the moved-to position.

Remedy: Press <HOLD>. Position beaker and press <START> or cancel sample series with <STOP>.

Lift not in rotating position

The sample rack must be at or above the predefined rotating position before it can rotate.

Remedy: Press <HOLD> and <STOP>. Move lift upward with <Ï> and then rotate rack again with <Í> or <Î>.

Sample rack error

An incorrect or no sample rack at all is in position. Possibly the magnet code of the rack cannot be read or the instrument does not recognize the magnet code.

Press <HOLD>. Position Metrohm standard sample rack. Press

<STOP> or <START>.

Invalid rack position

An attempt has been made to move to an invalid rack position (method error).

Remedy: Press <HOLD> and <STOP>. Check method.

Error 5:

824 Easy Sample Changer, Troubleshooting 37

Sample changer not ready

The 824 Easy Sample Changer cannot carry out the command as it is busy doing something else.

Remedy: Press <HOLD> and <STOP>. Wait and then repeat command.

7.1 Error messages

Error 6:

Error 10:

Error 11:

Error 12:

Sample rack and swing head not compatible

The positioned sample rack cannot be used together with the swing head and vice versa. Multi-row sample racks must be used with the swing head, single row racks without the swing head.

Remedy: Press <HOLD> and <STOP>. Change rack and press <STOP/RESET>.

Mains overload

The power supply cannot cope with the simultaneous use of all components (stirrers, pumps, lift).

Remedy: Press <HOLD> and <STOP>. Switch off a stirrer or a pump. If necessary, switch the instrument off and on again.

Method store full

The memory for the user-defined methods is full.

Remedy: Switch the instrument off and on again. Delete any methods which are no longer required from the memory (via RS232 interface or with the "6.2142.010 SC Controller" keypad).

Sample changer overload

Load or resistance is too large to carry out the selected action.

Remedy: Press <HOLD> and <STOP>. Remove the mechanical hindrance to the lift or sample rack.

Error 13:

Error 14:

Error 15:

RS232 error, interface error

Error during data transfer or control by a PC.

Remedy: Press <HOLD> and <STOP>. Observe the PC software display. Check the interface parameters. If necessary, consult the PC software manual.

Exceptional instrument error

An exceptional fault has occurred in the 824 Easy Sample Changer hardware.

Remedy: Switch the instrument off and on again. If the fault occurs again please contact the service department of your local Metrohm agency.

Program stopped (trap error)

An unexpected and non-recoverable program error has occurred.

Remedy: Switch the instrument off and on again. If the fault occurs again please contact the service department of your local Metrohm agency.

38 824 Easy Sample Changer, Troubleshooting

8.1 Technical data

8 Annex

In this section you will find the most important technical data of the 824 Easy Sample Changer. Furthermore there are listings of the four standard methods, the standard and optional accessories as well as the declaration of conformity and warranty.

8.1 Technical data

8.1.1 Interfaces

RS232 interface 25

Remote Interface 19

14 1

0 Vo lt

+5 Volt Output 5 Output 3 Output 1

Output 12 Output 13

Input 0

Input 2

Input 4

Input 6

0 Vo lt

1325

Outp ut 6 Outp ut 7 Outp ut 4 Outp ut 2 Outp ut 0 Outp ut 8 Outp ut 9 Output 10 Inp ut 1 Inp ut 3 Inp ut 5 Inp ut 7 Output 11

For the connection of computers

Universal parallel interface for synchronizing with external devices, 14 signal lines (8x input, 14x output), TTL-level

Input:

>20 ms

+5V

Output:

CEO

>200 ms

= 40 V

= 20 mA

+5 V: max. charge = 20 mA

8.1.2 Pump connections

Pump outputs 2x ±16 VDC, max. 300 mA , for ground–free load

active = low inactive = high

8.1.3 Lift

Max. lift stroke Max. load Stroke speed

approx. 235 mm approx. 10 N adjustable, 3...25 mm/s

8.1.4 Turntable

Turning speed adjustable, 3...20 angular degrees/s

8.1.5 Stirrer

Stirring speed

824 Easy Sample Changer, Annex 39

adjustable in 15 steps

- magnetic stirrer 180/min...2600/min

- rod stirrer 180/min...3000/min

8.1 Technical data

8.1.6 Power supply

Voltage Frequency Power input Fuses

100...120 V, 220...240 V

50...60 Hz 40 W

0.5 AT (110 V), 0.25 AT (220 V)

8.1.7 Safety Specifications

Construction and testing According to EN/IEC 61010-1, UL 3101-1

Safety instructions The Instructions for Use contain safety information that

must be observed by the user in order to ensure the safe operation of the instrument.

8.1.8 Electromagnetic compatibility (EMC)

Emission Standards fulfilled:

- EN/IEC 61326-1

- EN 55022

- CISPR 22

Immunity Standards fulfilled:

- EN/IEC 61326-1

- EN/IEC 61000-4-2

- EN/IEC 61000-4-3

- EN/IEC 61000-4-4

- EN/IEC 61000-4-5

- EN/IEC 61000-4-6

- EN/IEC 61000-4-8

- EN/IEC 61000-4-11

- EN/IEC 61000-4-14

8.1.9 Ambient temperature

Nominal working range Storage Transport

+5…+45 °C (at max. 85% relative humidity)

-20 °C…+60 °C

-40 °C…+60 °C 60 °C relative humidity <60% 50 °C " " <85% 40 °C " " <95%

40 824 Easy Sample Changer, Annex

8.1 Technical data

8.1.10 Dimensions and materials

Height Width Depth

Weight Materials

- Housing

- Keyboard case

- Keyboard film

- Sample rack

- Splash protection

74 cm 28 cm 48 cm

12.5 kg (without accessories)

metal housing, surface refined PBTP PETP, resistant to chemicals PVC PMMA

824 Easy Sample Changer, Annex 41

8.2 Method listings

8.2.1 Method 1

824 Easy Sample Chan. 5.824.0010

Parameters

method 1

number of samples: rack

>start sequence

1 CTL:Rm: INIT

2 SAMPLE: - 1

3 SAMPLE: + 1

>sample sequence

1 MOVE 1 : sample

2 LIFT: 1 : work mm

3 STIR: * : ON s

4 CTL:Rm: START dos*

5 WAIT 10 s

6 CTL:Rm: START device1

7 SCN:Rm : End1

8 STIR: * : OFF s

9 LIFT: 1 : shift mm

10 WAIT 3 s

>final sequence

1 MOVE 1 : spec.1

2 LIFT: 1 : work mm

>changer settings

rack number 0

lift rate 1 25 mm/s

shift rate 20

shift direction: auto.

beaker test mode: single

on beaker error: MOVE

>stirring rates

stirrer 1 3

stirrer 2 3

>manual stop

CTL Rmt: STOP device1

CTL RS232:

¬ Report header with program version

¬ Method name

¬ No. of samples (whole sample rack)

¬ Initialize remote interface

¬ Initialize sample

position

¬ Move next sample in front of tower

¬ Move lift to working position

¬ Switch on stirrer

¬ Start addition

¬ Waiting time

¬ Start instrument/titrator

¬ Wait for end of determination [EOD]

¬ Switch off stirrer

¬ Move lift to rotating position

¬ Waiting time: 3 s for drips

¬ Move conditioning beaker in front of tower

¬ Immerse electrode

------ Sample changer settings --------

¬ If sample beaker is missing then the

next one will be moved to automatically

------ Stirring rates ---------------------------

------ Reaction to manual stop --------------

¬ Stop instrument/titrator

42 824 Easy Sample Changer, Annex

8.2 Method listings

8.2.2 Method 2

824 Easy Sample Chan. 5.824.0010

Parameters

method 2

number of samples: rack

>start sequence

1 CTL:Rm: INIT

2 SAMPLE: - 1

3 SAMPLE: + 1

>sample sequence

1 SHIFTRATE: + 20 2 MOVE 1 : sample

3 LIFT: 1 : work mm

4 STIR: * : ON s

5 CTL:Rm: START dos*

6 WAIT 10 s

7 CTL:Rm: START device1

8 SCN:Rm : End1

9 STIR: * : OFF s

10 LIFT: 1 : shift mm 11 WAIT 3 s 12 SHIFTRATE: - 20 13 MOVE 1 : spec.1 14 LIFT: 1 : work mm 15 STIR: * : ON s 16 WAIT 5 s 17 STIR: * : OFF s 18 LIFT: 1 : shift mm 19 WAIT 3 s

>final sequence

1 MOVE 1 : spec.1 2 LIFT: 1 : work mm

>changer settings

rack number 0 lift rate 1 25 mm/s shift rate 20 shift direction: auto. beaker test mode: single on beaker error: MOVE

>stirring rates

stirrer 1 3 stirrer 2 3

>manual stop

CTL Rmt: STOP device1 CTL RS232:

¬ Report header with program version

¬ Method name

¬ No. of samples (whole sample rack)

¬ Initialize remote interface

¬ Initialize the

sample position

¬ Rack direction of rotation (clockwise) ¬ Move next sample in front of tower

¬ Move lift to working position

¬ Switch on stirrer

¬ Start addition

¬ Waiting time

¬ Start instrument/titrator

¬ Wait for end of determination [EOD]

¬ Switch off stirrer

¬ Move lift to rotating position ¬ Waiting time: 3 s for drips ¬ Rack direction of rotation (counterclockwise) ¬ Move conditioning beaker in front of tower ¬ Move lift to working position ¬ Switch on stirrer ¬ Waiting time ¬ Switch off stirrer ¬ Move lift to rotating position ¬ Waiting time: 3 s for drips

¬ Move conditioning beaker in front of tower ¬ Immerse electrode

------ Sample changer settings --------

¬ If sample beaker is missing then the

next one will be moved to automatically

------ Stirring rates ---------------------------

------ Reaction to manual stop -------------¬ Stop instrument/titrator

824 Easy Sample Changer, Annex 43

8.2 Method listings

8.2.3 Method 3

824 Easy Sample Chan. 5.824.0010 parameters

method 3 number of samples: rack

>start sequence

1 CTL:Rm: INIT 2 SAMPLE: - 1 3 SAMPLE: + 1

>sample sequence

1 SHIFTRATE: + 20 2 MOVE 1 : sample 3 LIFT: 1 : work mm 4 STIR: * : ON s 5 CTL:Rm: START dos* 6 WAIT 10 s 7 CTL:Rm: START device1 8 SCN:Rm : End1

9 STIR: * : OFF s 10 LIFT: 1 : rinse mm 11 WAIT 3 s 12 PUMP 1.1 : 3 s 13 WAIT 3 s

>final sequence

1 MOVE 1 : spec.1

2 LIFT: 1 : work mm

>changer settings

rack number 0 lift rate 1 25 mm/s shift rate 20 shift direction: auto. beaker test mode: single

on beaker error: MOVE

>stirring rates

stirrer 1 3 stirrer 2 3

>manual stop

CTL Rmt: STOP device1 CTL RS232:

¬ Report header with program version

¬ Method name ¬ No. of samples (whole sample rack)

¬ Initialize remote interface ¬ Initialize

sample position

¬ Rack direction of rotation (clockwise) ¬ Move next sample in front of tower ¬ Move lift to working position ¬ Switch on stirrer ¬ Start addition ¬ Waiting time ¬ Start instrument/titrator ¬ Wait for end of determination [EOD] ¬ Switch off stirrer ¬ Move lift to rinsing position ¬ Waiting time: 3 s for drips ¬ Switch on pump, 3 s for rinsing ¬ Waiting time: 3 s for drips

¬ Move rinsing beaker in front of tower ¬ Immerse electrode

------ Sample changer settings --------

¬ If sample beaker is missing then the

next one will be moved to automatically

------ Stirring rates ---------------------------

------ Reaction to manual stop -------------¬ Stop instrument/titrator

44 824 Easy Sample Changer, Annex

8.2 Method listings

8.2.4 Method 4

824 Easy Sample Chan. 5.824.0010 Parameters

method 4 number of samples: rack

>start sequence

1 CTL:Rm: INIT 2 SAMPLE: - 1 3 SAMPLE: + 1

>sample sequence

1 MOVE 1 : sample 2 LIFT: 1 : work mm 3 STIR: * : ON s 4 CTL:Rm: START dos* 5 WAIT 10 s 6 CTL:Rm: START device1 7 SCN:Rm : End1 8 STIR: * : OFF s

9 LIFT: 1 : rinse mm 10 PUMP 1.2 : 10 s 11 PUMP 1.1 : 5 s 12 PUMP 1.2 : 5 s 13 LIFT: 1 : shift mm 14 WAIT 3 s

>final sequence

1 MOVE 1 : spec.1

2 LIFT: 1 : work mm

>changer settings

rack number 0 lift rate 1 25 mm/s shift rate 20 shift direction: auto. beaker test mode: single on beaker error: MOVE

>stirring rates

stirrer 1 3 stirrer 2 3

>manual stop

CTL Rmt: STOP device1 CTL RS232:

¬ Report header with program version

¬ Method name ¬ No. of samples (whole sample rack)

¬ Initialize remote interface ¬ Initialize

sample position

¬ Move next sample in front of tower ¬ Move lift to working position ¬ Switch on stirrer ¬ Start addition ¬ Waiting time ¬ Start instrument/titrator ¬ Wait for end of determination [EOD] ¬ Switch off stirrer ¬ Move lift to rinsing position ¬ Switch on Pump 2, aspirate for 10 s ¬ Switch on Pump 1, rinse for 5 s ¬ Switch on Pump 2, aspirate for 5 s ¬ Move lift to rotating position ¬ Waiting time: 3 s for drips

¬ Move conditioning beaker in front of tower ¬ Immerse electrode

------ Sample changer settings --------

¬ If sample beaker is missing then the

next one will be moved to automatically

------ Stirring rates ---------------------------

------ Reaction to manual stop -------------¬ Stop instrument/titrator

824 Easy Sample Changer, Annex 45

8.3 Connecting external pumps

Metrohm 772 Peristaltic Pumps can be used for rinsing the electrodes and aspirating the measured sample solutions. Various models are available:

2.772.0020 772 Pump Unit with aspiration equipment

(including pump tubing, PTFE tubing, aspiration tip, distributor, PE canister …)

2.772.0030 772 Pump Unit with rinsing equipment

(including pump tubing, PTFE tubing, 3 spray nozzles, PE canister …)

External pumps may be connected directly to the pump connectors 22

Ext.

Pump 1

Ext.

Pump 2

on the rear side of the changer tower.

16 V

max. 300 mA

16 V

max. 300 mA

Fig. 21 Pump connections

If you consider to connect other pumps than the Metrohm

772 Pump Unit, check the electrical requirements, as there are:

• 16 Volt voltage

• 300 mA max. load

46 824 Easy Sample Changer, Annex

8.4 Connecting rinsing and aspirating equipment

pray

8.4 Connecting rinsing and aspirating equipment

Depending on the model (see above) the Metrohm 772 Pump Unit is delivered with accessories needed for rinsing or aspirating.

8.4.1 Attaching the distributor and tubing

from aspiration tip

to waste

to s

from rinsing canister

nozzles

To use aspiration tubing and/or the spray nozzles the 6.1808.160 distributor must be attached.

With the screws provided attach the distributor on the rear side of the changer tower.

Connect the tubings of the spray nozzles and the aspiration tube according to the drawing on the left. The tubings are then led through the tubing guide 12.

Fig. 22 Distributor

8.4.2 Spray nozzles

The M6 spray nozzles (6.2740.020) can be used for rinsing the electrode in combination with a pump (e.g. Metrohm 772 Pump Unit). Spray nozzles can be used with the macro- and micro-titration heads. The 3 spray nozzles are inserted into the slightly oblique openings of the titration head. These are connected to the distributor (6.1808.160) by using the FEP tubing supplied, see above. All three openings with M6 threads must be occupied. The lengths of tubing are led through the tubing guide. Polyethylene canisters (Metrohm Order. no. 6.1621.000) can be used as rinsing canisters for aqueous media. If organic solvents are used for rinsing then the chemical resistance of the pump tubing must be taken into account.

824 Easy Sample Changer, Annex 47

8.4 Connecting rinsing and aspirating equipment

Asp

Attaching the spray nozzles and aspiration tips

A = recommended opening for aspiration tip S = openings provided for spray nozzles

Macro-titration head

Micro-titration head

KF-titration head

Fig. 23 Attaching the spray nozzles and the aspiration tip

Spray nozzles may be adjusted vertically to optain a most effective rinsing performance.

Spray nozzles

iration ti

Fig. 24 Titration head with aspiration and rinsing equipment

Fig. 25 Function of the spray nozzles

48 824 Easy Sample Changer, Annex

8.5 Sample beakers for Karl Fischer titrations

8.4.3 Aspiration tip

The Metrohm 772 Pump Unit with aspiration equipment can be used for aspirating used sample solutions without any problems. If the sample solutions contain solids, precipitates (e.g. silver chloride) or sticky substances then a peristaltic pump such as the Metrohm 772 Pump Unit must be used, as diaphragm pumps can easily be blocked up or stuck together by solids.

The 6.1543.170 Aspiration tips can be used with all titration heads with SGJ9 openings, see above drawing. Take the chemical resistance of the tubing and connections into account. Polyethylene canisters (Metrohm Order. no. 6.1621.000) can be used as waste canisters for aqueous media. The 6.1821.000 Aspiration Tube is used with the KFT titration head. It should always be used as it ensures trouble-free penetration of the aluminum foil on the KF sample vessels.

8.5 Sample beakers for Karl Fischer titrations

Foil holder

6.2037.040

Al foil

Sample

beaker

For Karl Fischer titrations the measured-out sample is placed in a

6.1432.210 Sample Beaker together with a 6.1903.010 Stirrer Bar. The beaker is then covered centrally with 6.2820.000 Aluminum foil which is kept in place by the foil holder.

Fig. 26 Karl Fischer sample beaker

During the method sequence the lift with the titration head is moved to the working position. The aspiration tube should be the first object to penetrate the Al foil.

Attention

Always attach the 6.1821.000 Aspiration Tube to the KFT titration head, even when you do not intend to aspirate sample solutions. The aspiration tube is used to penetrate the Al foil.

Use only 6.2820.000 Al Foil as this has a defined thickness (0.010 mm).

824 Easy Sample Changer, Annex 49

8.6 Standard equipment

On receipt of the instrument please check that the delivery is complete.

8.6.1 824 Easy Sample Changer

Ordering no. 2.824.0010 with macro-titration head

No. Order. no. Description

1 1.824.0010 824 Easy Sample Changer

Sample changer with macro-titration head, rod stirrer, sample rack and sample beakers.

The following accessories are included:

1 1.802.0010 802 Rod Stirrer

12 6.1453.250 PP sample beakers, 250 mL

for sample changers

1 6.1458.010 Macro-titration head, PTFE

for sample changers

With 6 openings SGJ 14 and 3 opening SGJ 9

Suitable for rinsing and aspiration equipment.

1 6.1805.110 FEP tubing with light- and kink-

protection, with 2x M6 connections

L = 80 cm

1 6.1909.020 Propeller stirrer, PP

for 802 Rod Stirrer

L= 95 mm

1 6.2041.310 Sample rack, PVC

for Metrohm sample changers

for 12 x 250 mL sample beakers

1 6.2141.050 Remote cable for connecting:

Sample changer — 1x Titrino/ Titrando, 2x Dosimat

50 824 Easy Sample Changer, Annex

8.6 Standard equipment

1 6.2142.120 Keypad for 824 Easy Sample

Changer

3 6.2709.070 Guiding sleeve, ETFE,

for 6.1543.xxx, SGJ 9

1 6.2751.010 Splash protector

1 6.2752.010 Connections cover

1 6.2122.xxx Mains cable with type IEC 320/C13 connection

Plug according to customer’s requirements:

- Type SEV 12 (Switzerland...) 6.2122.020

- Type CEE(7), VII (Germany...) 6.2122.040

- Type NEMA/ASA (USA...) 6.2122.070

1 8.824.1001 824 Easy Sample Changer Instructions for Use, English

Ordering no. 2.824.0020 with micro-titration head

No. Order. no. Description

1 1.824.0020 824 Easy Sample Changer

Sample changer with micro-titration head, magnetic stirrer, sample rack and sample beakers.

The following accessories are included:

1 1.741.0010 Magnetic stirrer for sample changer

24 6.1432.210 Sample beaker, clear glass

max. 75 mL

for 6.2041.340 Sample Rack

824 Easy Sample Changer, Annex 51

8.6 Standard equipment

1 6.1458.020 Micro-titration head, PTFE

With 4 M10 screw threads

1 6.1805.110 FEP tubing with 2 M6 nipples,

2 mm i.d., with light- and kinkprotection

L = 80 cm

24 6.1903.030 Teflon stirrer bars with magnetic

core

L = 25 mm, d = 5 mm

1 6.2034.020 Attachment bracket for 741

Magnetic Stirrer

1 6.2041.340 Sample rack, PVC

for 24 x 6.1432.210 Sample Beakers (75 mL)

1 6.2141.050 Remote cable for connecting:

Sample changer — 1x Titrino/ Titrando, 2x Dosimat

1 6.2142.120 Keypad for 824 Easy Sample

Changer

1 6.2621.140 Allen key 2.5 mm

For mounting 6.2034.020 Attachment Bracket

1 6.2751.010 Splash protector

1 6.2752.010 Connections cover

52 824 Easy Sample Changer, Annex

8.7 Optional accessories

1 6.2122.xxx Mains cable with type IEC 320/C13 connection

Plug according to customer’s requirements:

- Type SEV 12 (Switzerland...) 6.2122.020

- Type CEE(7), VII (Germany...) 6.2122.040

- Type NEMA/ASA (USA...) 6.2122.070

1 8.824.1001 824 Easy Sample Changer Instructions for Use, English

8.7 Optional accessories

8.7.1 6.5610.020 KFT Equipment

for Karl Fischer titrations with the 2.824.0020 Easy Sample Changer, Micro Ordering no. 6.5610.020, containing the following accessories:

No. Order. no. Description

1 6.0340.000 Double Pt electrode for sample changers

1 6.1458.030 Sample changer titration head

for Karl Fischer titrations

1 6.1805.060 FEP tubing with 2 M6 nipples, 2 mm

i.d., with light- and kink-protection

L = 60 cm

1 6.1808.000 Coupling bush, ETFE

3x M6 threads

1 6.1808.090 Thread adapter, PVDF

Outer thread M8 / inner thread M6

1 6.1821.000 Aspiration tube, PTFE

L = 178 mm

824 Easy Sample Changer, Annex 53

8.7 Optional accessories

24 6.2037.040 Foil holder for 6.1432.210

Sample Beaker

for 6.2820.000 Al Foil

1000 6.2820.000 Al foil

1000 rounds 80 mm dia.

Thickness 0.010 mm

4 E.301.0022 O-rings 5.28/1.78 mm

4 E.301.0080 O-rings 28/5 mm

8.7.2 772 Pump Unit (2.772.0020)

Peristaltic pump with aspiration equipment

No. Order. no. Description

1 1.772.0020 Pump Unit 772

Peristaltic pump with following accessories:

1 6.1446.160 Stopper SGJ 14/6.6 mm

PTFE

For oblique insertion of objects in the titration head

1 6.1543.170 Aspiration tip, PTFE

with M8 thread

54 824 Easy Sample Changer, Annex

8.7 Optional accessories

1 6.1621.000 PE canister 10 L

For sample changer use as rinsing or waste container

Not suitable for organic solvents.

1 6.1805.510 PTFE tubing with kink-protection

With 2 tubing nipples M8, L = 60 cm

3 mm i.d.

1 6.1812.000 PTFE tubing

L = 400 cm

1 6.1808.160 Distributor for rinsing / aspirating,

3x M6, 1x M8

2 6.1820.050 Screw connector for 6.1826.100 Pump

Tubing

4/6 mm / nozzle

6.4/1.6 mm (Norton), L = 1 m

1 6.1828.000 Connecting nipple, PVDF,

for 6.1621.000 Canister

1 6.2621.140 Allen key 2.5 mm

for assembling 6.1808.160 Distributor

824 Easy Sample Changer, Annex 55

8.7 Optional accessories

8.7.3 772 Pump Unit (2.772.0030)

Peristaltic pump with rinsing equipment

No. Order. no. Description

1 1.772.0030 772 Pump Unit

Peristaltic pump with following accessories:

1 6.1621.000 PE canister 10 L

For sample changer use as rinsing or waste container

Not suitable for organic solvents.

3 6.1805.060 FEP tubing with 2 tubing nipples M6, 2

mm i.d., with light- and kink-protection

L = 60 cm

1 6.1812.000 PTFE tubing

L = 400 cm

2 6.1820.050 Screw connector for 6.1826.100 Pump

Tubing

4/6 mm / nozzle

6.4/1.6 mm (Norton), L = 1 m

1 6.1828.000 Connecting nipple, PVDF,

for 6.1621.000 Canister

3 6.2740.020 Rinsing nozzle, ETFE

With valve and M6 thread

56 824 Easy Sample Changer, Annex

8.7 Optional accessories

8.7.4 Optional accessories and instruments

Order. no. Description

2.802.0020

6.1909.020

2.741.0010

6.2034.020

2.759.0020

6.1462.020

6.1909.030

6.2042.030

6.2058.000

6.2751.030

6.2142.010 Sample changer keypad 'SC Controller'

6.1808.160 Distributor for rinsing / aspirating,

802 Rod Stirrer

with propeller stirrer, PP

741 Magnetic Stirrer

with attachment bracket for mounting on 824 Easy Sample Changer

759 Swing Head

with following accessories:

Titration head Propeller stirrer, PP (104 mm) for 75 mL vessels Buret tip clips, 2 pcs. Mounting plate for swing head Splash protector for swing head

for editing methods

3x M6, 1x M8

8.7.5 Connection cables

Order. no. Description

6.2141.020 Remote Cable 824 — 692/712/713 Titrino/Titrando

6.2141.030 Remote Cable 824 — 2x 692/712/713 Titrino/Titrando

6.2141.040 Remote cable 824 — Titrino/Titrando — 665/725/765/776 Dosimat

824 Easy Sample Changer, Annex 57

8.7 Optional accessories

6.2141.050 Remote cable 824 — Titrino/Titrando — 2x 665/725/765/776 Dosimat

6.2141.060 Remote cable 824 — 691 pH-Meter

6.2142.070 Remote cable 824 — 692/780/781 pH-Meter— 665/725/765/776

Dosimat

8.7.6 Sample racks and sample beakers

Order. no. Description

6.2041.380

6.2041.320 Sample Rack M16-0 (16 x 150 mL) for

6.2041.390 Sample Rack M16-0 (16 x 120 mL ) for

6.2041.340

6.2041.310

6.1432.320

6.1453.220

6.1453.250

6.2041.360

6.1459.310

6.2041.370

6.1459.310

6.1432.210

Sample Rack M12-0 (12 x 250 mL ) for

Metrohm sample beakers glass, 250 mL Metrohm sample beakers PP, 200 mL Metrohm sample beakers PP, 250 mL

Sample Rack M12-0 (12 x 150 mL) for

150 mL standard beakers (tall form) 200 mL disposable beakers (Euro) PP (1000 pcs.)

Sample Rack M14-0 (14 x 200 mL) for

200 mL disposable beakers (Euro) PP Sample Rack M14-0 (14 x 8 oz) for

disposable beakers (US) PP 8 oz

standard beakers (tall form)

disposable beakers (US) 120 mL Sample Rack M24-0 (24 x 75 mL) for

Metrohm sample beakers glass, 75 mL (Micro-titration head required)

58 824 Easy Sample Changer, Annex

8.7 Optional accessories

For operation with 759 Swing Head:

6.2041.350

6.2041.400

Order. no. Description

Sample Rack 48 x 75 mL for direct titration

6.1432.210

Metrohm sample beakers glass, 75 mL

Sample Rack 126 x 15 mL and 2 x 250 mL for pipetting

6.1432.320

6.1453.220

6.1453.250

for 15 mL test tubes and Metrohm sample beakers glass 250 mL or Metrohm sample beakers PP 200 mL or Metrohm sample beakers PP 250 mL

8.7.7 Electrodes for Sample Changers

For titrations with the Macro-titration head we recommend the use of Long-life electrodes (LL) or Titrodes (without glass SGJ) together with

6.1236.040 SGJ Sleeve made of silicone rubber.

6.0232.100 Ecotrode 12,5 cm

6.0253.100 Aquatrode 12,5 cm

6.0258.000 Unitrode 12,5 cm

6.0431.100 Ag-Titrode 12,5 cm

6.0430.100 Pt-Titrode 12,5 cm

6.0234.110 Comb. Mikro pH electrode (LL) 16 cm

6.0736.110 Micro-reference electrode Ag/AgCl 16 cm

6.0134.110 Micro-glass electrode 16 cm

6.0433.110 Micro-Ag Titrode 16 cm

6.0434.110 Micro-Pt Titrode 16 cm

6.0435.110 Mikro-Au Titrode 16 cm

6.1110.110 Pt 1000 temperature sensor 16 cm

Order. no. Description

If the Micro-titration head or the 759 Swing Head are used for direct titrations then the following special micro-electrodes can be used.

Order. no. Description

Further accessories: please see Metrohm Accessory Catalog.

824 Easy Sample Changer, Annex 59

8.8 Warranty and conformity

8.8.1 Warranty

The warranty on our products is limited to defects that are traceable to material, construction or manufacturing error which occur within 12 months from the day of delivery. In this case, the defects will be rectified in our workshops free of charge. Transport costs are to be paid by the customer.

For day and night operation, the warranty is limited to 6 months.

Glass breakage in the case of electrodes or other parts is not covered by the warranty. Checks which are not a result of material or manufacturing faults are also charged during the warranty period. For parts of outside manufacture insofar as these constitute an appreciable part of our instrument, the warranty stipulations of the manufacturer in question apply.

With the regard to the guarantee of accuracy, the technical specifications in the instruction manual are authoritative.

Concerning defects in material, construction or design as well as the absence of guaranteed features, the orderer has no rights or claims except those mentioned above.

If damage of the packaging is evident on receipt of a consignment or if the goods show signs of transport damage after unpacking, the carrier must be informed immediately and a written damage report demanded. lack of an official damage report releases Metrohm from any liability to pay compensation.

If any instruments and parts have to be returned, the original packaging should be used if at all possible. This applies above all to instruments, electrodes, burette cylinders and PTFE pistons. Before embedment in wood shavings or similar material, the parts must be packed in a dustproof package (for instruments, use of a plastic bag is imperative). If open assemblies are enclosed in the scope of delivery that are sensitive to electromagnetic voltages (e.g. data interfaces etc.) these must be returned in the associated original protective packaging (e.g. conductive protective bag). (Exception: assemblies with built-in voltage source belong in a non-conductive protective packaging).

No warranty responsibility whatsoever will be accepted by Metrohm for damage which arises as a result of non-compliance with these instructions.

60 824 Easy Sample Changer, Annex

8.8 Warranty and conformity

8.8.2 EU Declaration of Conformity for 824 Easy Sample Changer

EU Declaration of Conformity

The Metrohm Ltd. company, Herisau, Switzerland hereby certifies, that the instrument:

824 Easy Sample Changer

meets the requirements of EU Directives 89/336/EEC and 73/23/EEC.

Source of specifications:

EN 61326-1 Electromagnetic compatibility, basic specification

Emitted Interference, Interference Immunity

EN 61010-1 Safety requirements for electrical laboratory measurement

and control equipment

Description of the instrument:

Sample changer for the automation of batch processing of larger sample series, applying titration and measuring methods in laboratory and industry.

Herisau, July 7, 2002

Dr. J. Frank Ch. Buchmann

Development Manager Production and Quality Assurance Manager

824 Easy Sample Changer, Annex 61

8.8 Warranty and conformity

8.8.3 Declaration of Conformity: 824 Easy Sample Changer

Certificate of Conformity and System Validation

This is to certify the conformity to the standard specifications for electrical appliances and accessories, as well as to the standard specifications for security and to system validation issued by the manufacturing company.

Name of commodity: 824 Easy Sample Changer Manufacturer: Metrohm Ltd., Herisau, Switzerland

Technical specifications: Distribution voltage: 100…120, 220…240 V Frequency: 50…60 Hz

The instrument was manufactured and tested according to the following standards:

Electromagnetic compatibility:

Emission IEC 61326-1, EN 55022, CISPR 22

Immunity IEC 61326-1, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11, IEC 61000-4-14

Security specifications

IEC 61010-1, UL 3101-1

It has also been certified by the Swiss Electrotechnical Association (SEV), which is member of the International Certification Body (CB/IEC).

The technical specifications are documented in the instruction manual.

Metrohm Ltd. is holder of the SQS-certificate of the quality system ISO 9001 for quality assurance in design/development, production, installation and servicing.

Herisau, July 7, 2002

Dr. J. Frank Ch. Buchmann

Development Manager Production and Quality Assurance Manager

62 824 Easy Sample Changer, Annex

Index

[SELECT] .............................. 27

<Í> ........................... 22, 24, 25

<HOLD> .......................... 26, 37

<PUMP 1> ............................. 24

<RESET/STOP> ................... 24

<SELECT> ...................... 21, 25

<START>............................... 25

<STIR 1> ............................... 24

2-row sample rack.................. 14

6.2142.010 SC Controller....... 34

759 Swing Head........... 2, 14, 17

Accessories............................ 50

Active method ........................ 28

Additional instruments............ 57

Aluminum foil.......................... 49

Ambient temperature ............... 9

Annex ..................................... 39

Arrow key.................................. 4

Aspirating ................... 46, 47, 49

Aspiration equipment ....... 46, 54

Aspiration tips .................. 48, 49

Aspiration tube ....................... 49

Atmospheric humidity .............. 9

Attachment screws........... 11, 13

Automatic operation............... 25

Beaker missing....................... 37

Beakers ............................ 19, 58

Buret tip.................................. 11

Canceling ............................... 26

Canisters .......................... 47, 49

Care........................................ 35

Certificate ............................... 62

Cleaning ................................. 35

Computer ............................... 18

Conformity declaration........... 61

Connection............................... 7

Connection cables ........... 15, 57

Connections cover ................... 5

Construction........................... 40

Controlling external devices ... 39

Danger...................................... 3

Dimensions ............................ 41

Disposable beakers ......... 19, 58

Distributor............................... 47

Dosimat ............................ 16, 32

Editing methods ..................... 34

Electrical safety ........................ 7

Electricity supply ...................... 7

Electrodes .............................. 59

Electromagnetic compatibility....

..................................... 40, 62

Electrostatic charges................ 7

EMC........................................ 40

Emission................................. 40

Error messages...................... 37

EU Declaration ....................... 61

External pumps ................ 32, 46

Faults.................................. 7, 27

FEP tubing.............................. 47

Final sequence....................... 29

Fuse........................................ 10

Fuse holder ........................ 5, 10

GLP ........................................ 36

Good Laboratory Practice...... 36

Guiding sleeve ....................... 11

Immunity................................. 40

Information ............................... 3

Input ....................................... 39

Installation ............................ 8, 9

Interrupting ............................. 26

Invalid ..................................... 37

Karl Fischer titrations........ 49, 53

Keyboard connection......... 6, 10

Keypad ............................... 4, 34

KFT equipment....................... 53

KFT Titration head............ 12, 49

Knurled nuts ........................... 13

Labeling field............................ 4

LED......................................... 27

LED blinks .................. 25, 26, 27

LEDs......................................... 4

LEDs 1 to 4............................. 28

Lift........................................... 39

Line sleeve ............................... 6

Load methods ........................ 21

Location.................................... 9

Macro-titration head............... 50

Macro-version .......................... 1

Magnet code .................... 19, 20

Magnetic stirrer .......... 13, 32, 57

Mains connection..................... 9

Mains switch............................. 5

Mains voltage ........................... 9

Malfunctions............................. 7

Manual operation ................... 24

Manufacturing number............. 6

Materials................................. 41

Method labels......................... 30

Method listings....................... 42

Method selection.............. 21, 25

Methods ................................. 30

Micro-titration head ................ 51

Micro-version............................ 1

Moving the lift ......................... 24

Multi-row sample rack ............ 14

Not ready................................ 37

Number of samples................ 29

On LED................................... 27

Operation ............................... 21

O-rings ................................... 12

Output .................................... 39

Overload................................. 38

Packaging ................................ 9

Parallel interface..................... 39

Penetration ............................. 49

Peripheral devices.............. 8, 15

Peristaltic pump ... 46, 49, 54, 56

pH-Meter .......................... 17, 32

Pictograms ............................... 3

Power supply.......................... 40

Precipitates............................. 49

Propeller stirrer ....................... 11

Pump.......................... 24, 32, 39

Pump connectors............... 6, 46

Pump control.......................... 21

Pump Unit .................. 32, 54, 56

Quality control ........................ 36

Relative humidity .................... 40

Remedy .................................. 37

Remote box...................... 16, 17

824 Easy Sample Changer, Index 63

Index

Remote cable..........................57

Remote connections...............15

Remote interface.......................5

Remote socket ........................15

Repair........................................7

Rinsing ..............................46, 47

Rinsing canisters.....................47

Rinsing equipment ............46, 56

Rinsing position ......................22

Rod stirrer....................11, 32, 57

Rotating...................................24

RS232......................................18

RS232 connector ......................6

Safety information ...............7, 40

Sample beakers ......................58

Sample changer keypad...34, 57

Sample changer settings ........21

Sample rack ................19, 20, 58

Sample sequence ...................29

Sample series .........................25

SC Controller.......................2, 57

Screw nipple ...........................11

Serial connection ....................18

Service-personnel .....................7

Settings ...................................22

Setup.........................................9

Shift height ..............................23

Solids ......................................49

Special beaker ........................19

Splash protector..................5, 13

Spray nozzles....................32, 47

Standard equipment ...............50

Standard methods ............25, 29

Standards fulfilled ...................40

Start sequence........................29

Starting....................................25

Status ..................................4, 27

Stirrer.......................................39

Stirrer connection......................5

Stirrer control...........................21

Stirrer guide.............................13

Stirrer on/off ............................24

Stirrer rate................................23

Swing head .................14, 17, 57

Technical data.........................39

Temperature............................40

Test tubes ...............................19

Titrando .............................16, 32

Titration beaker .......................19

Titration head ..........................11

Titrino ..........................15, 16, 32

Titrodes ...................................59

Transmission parameters .......18

Transport damage ..................60

Trap error ................................38

Troubleshooting ......................37

Tubing .....................................47

Tubing guide .................5, 13, 47

Validation.................................36

Versions ....................................1

Voltage ....................................10

Warning.....................................3

Warranty ..................................60

Waste canisters.......................49

Whole status ...........................27

Working position .....................22

64 824 Easy Sample Changer, Index

Metrohm 824 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

List of illustrations

1 Introduction

1.1 Instrument description

1.1.1 Two versions

1.2 Information about these Instructions for Use

1.3 Parts and controls

1.3.1 The keypad

1.3.2 Individual parts and standard accessories

1.4 Safety information

1.4.1 General:

1.4.2 Electrical safety

2 Installation

2.1 Instrument setup

2.1.1 Packaging

2.1.2 Checks

2.1.3 Location

2.2 Mains connection

2.3 Keyboard connection

2.4 Attaching and equipping a titration head

2.4.1 Attaching and equipping the KF titration head

2.4.2 Attaching the splash protector

2.4.3 741 Magnetic Stirrer

2.5 Attaching the 759 Swing Head

2.5.1 Procedure

2.6 Connecting devices to the Remote socket

2.6.1 Remote connections

2.7 Serial connection (RS232)

2.8 Sample racks

2.8.1 Positioning a sample rack

3 Operation

3.1 The <SELECT> key

3.2 Settings

3.2.1 Setting the working position of the lift

3.2.2 Setting the rinsing position of the lift

3.2.3 Setting the shifting position of the lift

3.2.4 Setting the stirrer rate

3.3 Manual operation

3.3.1 Moving the lift

3.3.2 Rotating the sample rack

3.3.3 Switching the stirrer on/off

3.3.4 Operating the pumps

3.4 Automatic operation

3.4.1 Preparing a sample series

3.4.2 Method selection

3.4.3 Starting a method

3.4.4 Interrupting a method run

3.4.5 Canceling a method run

3.5 Functions of the LEDs

3.5.1 The Status LED

3.5.2 The [SELECT] LEDs

3.5.3 LEDs 1 to 4

4 Standard methods

4.1 Information about the methods

Series operating

4.2 Method labels

4.3 Method 1

4.4 Method 2

4.5 Method 3

4.6 Method 4

4.6.1 Editing methods

5 Maintenance information

5.1 Maintenance / Service

5.2 Care / Maintenance

6 GLP validation

7 Troubleshooting

7.1 Error messages

8 Annex

8.1 Technical data

8.1.1 Interfaces

8.1.2 Pump connections

8.1.3 Lift

8.1.4 Turntable

8.1.5 Stirrer

8.1.6 Power supply

8.1.7 Safety Specifications