Metrohm 876 User Manual

Download

876 Dosimat plus

Manual

8.876.8003EN

Metrohm AG CH-9100 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com

876 Dosimat plus

8.876.8003EN

Manual

09.2011 dm

Teachware Metrohm AG CH-9100 Herisau teachware@metrohm.com

Although all the information given in this documentation has been checked with great care, errors cannot be entirely excluded. Should you notice any mistakes please send us your comments using the address given above.

Documentation in additional languages can be found on

http://products.metrohm.com under Literature/Technical documenta-

tion.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 Introduction 1

1.1 Instrument description ......................................................... 1

1.1.1 Dosing modes ......................................................................... 1

1.1.2 Connectors .............................................................................. 1

1.2 Intended use ......................................................................... 2

1.3 About the documentation ................................................... 2

1.3.1 Symbols and conventions ........................................................ 2

1.4 Safety instructions ................................................................ 3

1.4.1 General notes on safety ........................................................... 3

1.4.2 Electrical safety ........................................................................ 3

1.4.3 Tubing connections ................................................................. 4

1.4.4 Flammable solvents and chemicals ........................................... 5

1.5 Recycling and disposal ......................................................... 5

Table of contents

2 Overview of the instrument 6

2.1 876 Dosimat plus ................................................................. 6

2.2 Manual Dosing Controller .................................................... 8

3 Installation 9

3.1 Setting up the instrument .................................................... 9

3.1.1 Packaging ................................................................................ 9

3.1.2 Checks .................................................................................... 9

3.1.3 Location .................................................................................. 9

3.2 Connecting a stirrer .............................................................. 9

3.3 Connecting the Manual Dosing Controller ....................... 10

3.4 Connecting a balance ......................................................... 10

3.5 Connecting a keyboard, printer and other USB devi-

ces ........................................................................................ 11

3.6 Connecting instruments to the remote connector .......... 13

3.7 Connecting the 805 Dosimat ............................................. 14

3.8 Attaching the exchange unit ............................................. 15

876 Dosimat plus

4 Operation 16

4.1 Switching the instrument on and off ............................... 16

4.2 Fundamentals of operation ............................................... 17

4.2.1 The keypad ............................................................................ 17

4.2.2 Structure of the dialog windows ............................................ 18

4.2.3 Navigating in the dialog ......................................................... 18

￭￭￭￭￭￭￭￭

III

Table of contents

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

4.2.4 Entering text and numbers ..................................................... 19

4.2.5 Selecting from a selection list ................................................. 20

4.3 Methods .............................................................................. 20

4.3.1 Method templates ................................................................. 20

4.3.2 Creating a new method ......................................................... 20

4.3.3 Saving a method ................................................................... 21

4.3.4 Loading a method ................................................................. 22

4.3.5 Exporting a method ............................................................... 23

4.4 Stirrer operation ................................................................. 24

4.5 Entering sample data ......................................................... 25

4.6 Preparing the buret unit (PREP) ........................................ 25

4.7 Printing a report manually ................................................. 26

5 System settings 28

5.1 Basic settings ...................................................................... 28

5.2 Managing solutions ............................................................ 31

5.2.1 General ................................................................................. 31

5.2.2 Editing the solution data ........................................................ 31

5.3 File management ................................................................ 33

5.4 Configuring external devices ............................................. 34

5.5 Instrument diagnosis .......................................................... 37

5.5.1 Loading program versions and language files ......................... 37

5.5.2 Diagnosis functions ............................................................... 38

6 Parameters and dosing modes 39

6.1 Manual dosing (DOS) ......................................................... 39

6.1.1 General description ................................................................ 39

6.1.2 Selecting a solution ............................................................... 40

6.1.3 Dosing parameters ................................................................ 40

6.1.4 Calculation ............................................................................ 41

6.1.5 Reports .................................................................................. 43

6.1.6 Pulse control .......................................................................... 43

6.2 Extended dosing (XDOS) .................................................... 44

6.2.1 General description ................................................................ 44

6.2.2 Selecting a solution ............................................................... 45

6.2.3 Selecting the operating mode ................................................ 45

6.2.4 Dosing parameters ................................................................ 47

6.2.5 Reports .................................................................................. 48

￭￭￭￭￭￭￭￭

7 Handling and maintenance 49

7.1 General ................................................................................ 49

7.2 Quality Management and validation with Metrohm ....... 49

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

8 Appendix 51

Table of contents

8.1 Exchange unit ..................................................................... 51

8.1.1 Maximum dosing and filling rate ............................................ 51

8.1.2 Parameters for the preparing (PREP) ....................................... 51

8.2 Stirring rate ......................................................................... 52

8.3 Balance ................................................................................ 52

8.4 USB devices ......................................................................... 53

8.4.1 Numerical USB keypad 6.2147.000 ........................................ 53

8.4.2 Key assignment of a USB keyboard ........................................ 54

8.4.3 Printer ................................................................................... 54

8.5 System initialization ........................................................... 55

8.6 Remote interface ................................................................ 56

8.6.1 Pin assignment of the remote interface .................................. 56

8.6.2 Status diagram of the remote interface .................................. 57

8.7 Pulse control ....................................................................... 59

8.8 Remote control via an RS-232 connection ....................... 60

8.8.1 Commands and variables ....................................................... 61

9 Technical specifications 63

9.1 Dosing drive ........................................................................ 63

9.2 Interfaces ............................................................................. 63

9.3 Mains connection ............................................................... 63

9.4 Safety specification ............................................................ 64

9.5 Electromagnetic compatibility (EMC) ................................ 64

9.6 Ambient temperature ......................................................... 64

9.7 Reference conditions .......................................................... 65

9.8 Dimensions .......................................................................... 65

10 Conformity and warranty 66

10.1 Declaration of Conformity ................................................. 66

10.2 Quality Management Principles ........................................ 67

10.3 Warranty (Guarantee) ........................................................ 68

11 Accessories 70

11.1 Scope of delivery 2.876.0010 ............................................ 70

876 Dosimat plus

11.2 Scope of delivery 2.876.0010 ............................................ 72

11.3 Optional accessories ........................................................... 76

Index 79

￭￭￭￭￭￭￭￭

Table of figures

Figure 1 Front 876 Dosimat plus ..................................................................... 6

Figure 2 Rear 876 Dosimat plus ...................................................................... 7

Figure 3 Manual Dosing Controller 6.2107.100 ............................................... 8

Figure 4 Connecting a stirrer ........................................................................... 9

Figure 5 Connecting the Manual Dosing Controller ....................................... 10

Figure 6 Connecting a balance ...................................................................... 10

Figure 7 Connecting USB devices .................................................................. 11

Figure 8 Connecting the USB stick ................................................................ 12

Figure 9 Connecting the 6.2147.000 USB keyboard with USB stick and

printer ............................................................................................. 13

Figure 10 Connecting the USB hub with USB stick, printer and the 6.2148.030

RS-232/USB Box (for connecting balances). ...................................... 13

Figure 11 Connecting a remote cable ............................................................. 13

Figure 12 Connecting the 805 Dosimat ........................................................... 14

Figure 13 MSB connector on the 801 Stirrer ................................................... 14

Figure 14 Attaching the exchange unit ........................................................... 15

Figure 15 Keypad 876 Dosimat plus ................................................................ 17

Figure 16 Directory structure on the USB stick ................................................. 34

Figure 17 Dosing ramp, two examples ............................................................ 41

Figure 18 Tandem operation ........................................................................... 46

Figure 19 Rotational speed depending on stirring rate .................................... 52

Figure 20 Pin assignment of remote socket and plug ...................................... 56

Figure 21 Remote status diagram DOS ............................................................ 57

Figure 22 Remote status diagram DOS with pulse control ............................... 58

Figure 23 Remote status diagram XDOS .......................................................... 58

Figure 24 Connecting the RS-232/USB Box to the PC ...................................... 60

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 Introduction

1.1 Instrument description

The 876 Dosimat plus is a universally utilizable dosing instrument. Methods can be generated and stored under a new name. When a USB memory stick is connected as an external storage medium, then the methods can be exported to that USB memory stick. This function makes it possible for you to copy methods quickly and easily from one instrument to another. The remote connector enables the integration of the instrument in a Metrohm automation system.

1.1.1 Dosing modes

The following dosing modes are supported:

￭ DOS

Manual dosing.

￭ XDOS

Fixed volume dosing, with freely selectable dosing criteria.

1 Introduction

1.1.2 Connectors

The instrument is equipped with the following connectors:

￭ MSB connector (Metrohm Serial Bus)

￭ USB (OTG) connector

￭ Remote connector

For connecting a stirrer and an 805 Dosimat for tandem dosings.

The 6.2151.100 adapter allows you to connect, for example, a printer, a USB memory stick or a USB keyboard. A printer can also be connected directly with the 6.2151.120 cable.

For connecting a Manual Dosing Controller, a Titrino plus or a sample changer.

876 Dosimat plus

￭￭￭￭￭￭￭￭

1.2 Intended use

The 876 Dosimat plus is designed for use in laboratories and production plants. Its main area of application is the precise dosing of liquids. This includes simple dosing according to specific criteria and manual titrations.

The present instrument is suitable for dosing chemicals and flammable solvents. The usage of the 876 Dosimat plus therefore requires that the user has basic knowledge and experience in the handling of poisonous and caustic substances. Knowledge with respect to the application of the fire prevention measures prescribed for laboratories or production plants is also mandatory.

1.3 About the documentation

Caution

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Please read through this documentation carefully before putting the instrument into operation. The documentation contains information and warnings which have to be followed by the user in order to ensure safe operation of the instrument.

1.3.1 Symbols and conventions

The following symbols and styles are used in this documentation:

Method Dialog text, parameter in the software

File ▶ New Menu or menu item

[Next] Button or key

Cross-reference to figure legend

The first number refers to the figure number, the second to the instrument part in the figure.

Instruction step

Carry out these steps in the sequence shown.

Warning

￭￭￭￭￭￭￭￭

This symbol draws attention to a possible life hazard or risk of injury.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 Introduction

Warning

This symbol draws attention to a possible hazard due to electrical current.

Warning

This symbol draws attention to a possible hazard due to heat or hot instrument parts.

Warning

This symbol draws attention to a possible biological hazard.

Caution

This symbol draws attention to a possible damage of instruments or instrument parts.

Note

This symbol marks additional information and tips.

1.4 Safety instructions

1.4.1 General notes on safety

Warning

This instrument may only be operated in accordance with the specifications in this documentation.

This instrument has left the factory in a flawless state in terms of technical safety. To maintain this state and ensure non-hazardous operation of the instrument, the following instructions must be observed carefully.

1.4.2 Electrical safety

The electrical safety when working with the instrument is ensured as part of the international standard IEC 61010.

Warning

Only personnel qualified by Metrohm are authorized to carry out service work on electronic components.

876 Dosimat plus

￭￭￭￭￭￭￭￭

1.4 Safety instructions

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Warning

Never open the housing of the instrument. The instrument could be damaged by this. There is also a risk of serious injury if live components are touched.

There are no parts inside the housing which can be serviced or replaced by the user.

Mains voltage

Warning

An incorrect mains voltage can damage the instrument.

Only operate this instrument with a mains voltage specified for it (see rear panel of the instrument).

Protection against electrostatic charges

Electronic components are sensitive to electrostatic charges and can be destroyed by discharges.

Always pull the mains cable out of the mains connection socket before connecting or disconnecting electrical appliances on the rear panel of the instrument.

1.4.3 Tubing connections

Leaks in tubing connections are a safety risk. Tighten all connections well by hand. Avoid applying excessive force to tubing connections. Damaged tubing ends lead to leakage. Appropriate tools can be used to loosen connections.

Check the connections regularly for leaks.

Warning

Caution

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1.4.4 Flammable solvents and chemicals

Warning

All relevant safety measures are to be observed when working with flammable solvents and chemicals.

￭ Set up the instrument in a well-ventilated location. ￭ Keep all sources of flame far from the workplace. ￭ Clean up spilled fluids and solids immediately. ￭ Follow the safety instructions of the chemical manufacturer.

1.5 Recycling and disposal

This product is covered by European Directive 2002/96/EC, WEEE – Waste from Electrical and Electronic Equipment.

The correct disposal of your old equipment will help to prevent negative effects on the environment and public health.

1 Introduction

More details about the disposal of your old equipment can be obtained from your local authorities, from waste disposal companies or from your local dealer.

876 Dosimat plus

￭￭￭￭￭￭￭￭

2.1 876 Dosimat plus

2 Overview of the instrument

2.1 876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Figure 1 Front 876 Dosimat plus

Piston rod

Of the dosing drive.

Coupling

For switching the flat stopcock.

Keypad

Contact pins

For the data chip.

Display

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

2 Overview of the instrument

Figure 2 Rear 876 Dosimat plus

Type plate

Contains specifications concerning mains voltage and serial number.

USB (OTG) connector

For connecting printers, USB sticks, USB hubs, etc.

Remote connector

For connecting the Manual Dosing Controller or instruments with a remote interface. D-Sub, 9-pin.

Mains connection socket

MSB connector

Metrohm Serial Bus.

For connecting a stirrer or an 805 Dosimat. Mini DIN, 9-pin.

876 Dosimat plus

￭￭￭￭￭￭￭￭

2.2 Manual Dosing Controller

1 2

2.2 Manual Dosing Controller

Figure 3 Manual Dosing Controller 6.2107.100

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Dosing key

To start the dosing.

Stop key/Fill key

For stopping and filling the dosing cylinder.

Status LED

Indicates the readiness of the instrument.

Connection cable

With 9-pin D-Sub plug.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

3 Installation

3.1 Setting up the instrument

3.1.1 Packaging

The instrument is supplied in highly protective special packaging together with the separately packed accessories. Keep this packaging, as only this ensures safe transportation of the instrument.

3.1.2 Checks

Immediately after receipt, check whether the shipment has arrived complete and without damage by comparing it with the delivery note.

3.1.3 Location

The instrument has been developed for operation indoors and may not be used in explosive environments.

3 Installation

Place the instrument in a location of the laboratory which is suitable for operation, free of vibrations, protected from corrosive atmosphere, and contamination by chemicals.

The instrument should be protected against excessive temperature fluctuations and direct sunlight.

3.2 Connecting a stirrer

You can connect the following stirrers:

￭ 801 Stirrer ￭ 803 Ti Stand ￭ 804 Ti Stand (requires rod stirrer)

876 Dosimat plus

Figure 4

Connecting a stirrer

￭￭￭￭￭￭￭￭

3.3 Connecting the Manual Dosing Controller

Caution

Make sure that the flat side of the plug matches the marking on the socket.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

3.3 Connecting the Manual Dosing Controller

Figure 5 Connecting the Manual Dosing Controller

The Manual Dosing Controller is connected to the remote connector on the rear of the instrument.

3.4 Connecting a balance

Balances are equipped with a serial RS-232 interface as a rule. To connect a balance, you require a 6.2148.030 RS-232/USB Box.

Figure 6

When a 6.2151.020 USB cable is used, then the 6.2148.030 RS-232/USB Box can be connected to the 876 Dosimat plus by means of a USB hub or a 6.2151.100 adapter (see Chapter 3.5, page 11).

Connecting a balance

￭￭￭￭￭￭￭￭

Connect the 9-pin plug of the respective balance connecting cable to the RS 232/1 connector. Consult the user manual of the balance in order to select the correct connecting cable.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

6.2151.100

3 Installation

The parameters for the RS-232 interface on the instrument must match those on the balance (see "Editing the COM1 settings", page 35). Additionally consult the user manual of the balance.

3.5 Connecting a keyboard, printer and other USB devices

The 876 Dosimat plus has a USB (OTG) connector. Use the provided

6.2151.100 adapter USB MINI (OTG) - USB A for connecting USB devices as e.g. printers, keyboards or USB sticks, see the following figure.

Figure 7

Connecting USB devices

Caution

Switch the instrument off before connecting or disconnecting a USB device or a USB stick.

The 876 Dosimat plus can only recognize the device immediately after switching on.

The following devices can be operated directly on the USB connector with the 6.2151.100 adapter:

￭ USB sticks (for the backup or storing of methods) ￭ 6.2147.000 numerical USB keypad ￭ 6.2148.030 RS-232/USB Box (for connecting balances or for the

RS-232 remote control)

￭ USB hub (with or without an own power supply)

The 6.2147.000 numerical USB keypad serves for comfortable numerical input and for navigating in the dialog. In addition, it provides two USB connectors. Connect additional USB devices to the keypad.

876 Dosimat plus

￭￭￭￭￭￭￭￭

3.5 Connecting a keyboard, printer and other USB devices

USB MINI (OTG)-USB

USB stick

6.2151.100

Note

Most of the USB devices need a so-called hub in order to work correctly.

A USB hub is a distributor to which several USB devices can be connected. USB hubs are available in specialty stores in a number of different models.

The USB (OTG) connector of the 876 Dosimat plus has no such hub. The 6.2147.000 numerical USB keypad has a USB hub and two USB connectors.

The following devices can only be connected to a 6.2147.000 numerical keypad or to a USB hub:

￭ Printer (with USB connector, use the 6.2151.020 connecting cable) ￭ Barcode reader (with USB cable) ￭ Mouse (PC mouse with USB cable, for navigating in the dialog)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

The following devices can only be connected to a USB hub:

￭ PC keyboard (with USB cable, for the comfortable input of letters and

numbers)

￭ Keypad with numerical keypad (with USB cable)

If you wish to connect several different instruments without own power supply, then you must possibly use a USB hub with own power

supply (self powered). The USB (OTG) connector of the 876 Dosimat plus is not designed for supplying power to several devices with elevated electricity requirements.

Also observe the instructions in chapter 8.4, page 53.

Examples:

Figure 8

Connecting the USB stick

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

USB MINI (OTG)-USB

USB stick

Keypad

6.2147.000

6.2151.100

Printer

USB MINI (OTG)-USB

USB stick

USB-Hub

RS-232/USB Box

6.2148.030

6.2151.100

Printer

3 Installation

Figure 9 Connecting the 6.2147.000 USB keyboard with USB stick and

printer

3.6 Connecting instruments to the remote connector

Figure 10 Connecting the USB hub with USB stick, printer and the

6.2148.030 RS-232/USB Box (for connecting balances).

The 876 Dosimat plus can be integrated in an automation system with the aid of a remote cable.

Figure 11

A variety of different connecting cables are available for connecting Metrohm instruments (e.g. sample changers) (see Optional Accessories

Connecting a remote cable

chapter).

876 Dosimat plus

￭￭￭￭￭￭￭￭

3.7 Connecting the 805 Dosimat

For tandem operation (XDOS mode), an 805 Dosimat can be connected to the MSB 1 socket on the rear of the 876 Dosimat plus.

Figure 12 Connecting the 805 Dosimat

Caution

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Make sure that the flat side of the plug matches the marking on the socket.

If the MSB 1 connector is already occupied by a stirrer (e.g. 801 Stirrer), then the 805 Dosimat can be connected to the MSB socket of the stirrer.

Figure 13

MSB connector on the 801 Stirrer

Caution

Make sure that the flat side of the plug matches the marking on the socket.

￭￭￭￭￭￭￭￭

The 876 Dosimat plus must be switched off and then on again after connection.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

3.8 Attaching the exchange unit

3 Installation

Figure 14 Attaching the exchange unit

To attach the exchange unit, proceed as follows:

Slide the exchange unit from the front onto the 876 Dosimat plus

and push all the way to the rear.

It must snap in audibly.

876 Dosimat plus

￭￭￭￭￭￭￭￭

4.1 Switching the instrument on and off

4 Operation

4.1 Switching the instrument on and off

Switching on the instrument

Proceed as follows:

￭ Press the red [FILL] key.

The instrument is initialized and a system test performed. This process takes some time.

￭ If a buret unit has been attached, then a request appears to carry

out the PREP function:

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

All tubings and the cylinder are rinsed with the PREP (Preparing) function. The preparing of the buret unit is described in chapter "Preparing the buret unit (PREP)", page 25.

￭ Confirm the message with [OK].

The display of this message can be deactivated in the system settings (see "PREP warning", page 30).

The main dialog is displayed:

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

FILL

Switching off the instrument

The instrument is switched off with the [FILL] key. The fact that the key needs to be pressed down for an extended time prevents accidental switch off.

Proceed as follows:

￭ Keep the red [FILL] key pressed down for at least 3 s.

A progress bar is displayed. If the key is released during this time, then the instrument will not be switched off.

4.2 Fundamentals of operation

4.2.1 The keypad

4 Operation

Figure 15

Keypad 876 Dosimat plus

BACK Apply the input and exit the dialog.

⇧ ⇩ Move the selection bar either up or down by one

line at a time. Select the character to be entered in the text editor.

⇦ ⇨ Select the character to be entered in the text and

number editor. Select the individual functions in the function bar.

OK Confirm the selection.

FILL Stop an ongoing method run or a manual func-

tion. Switch the instrument on/off.

GO Start a method run or a manual function.

876 Dosimat plus

￭￭￭￭￭￭￭￭

4.2 Fundamentals of operation

4.2.2 Structure of the dialog windows

The current dialog title is displayed on the left-hand side of the title line. The current status of the system is displayed in the upper right-hand corner:

ready The instrument is in normal status.

busy A method has been started.

hold A method has been paused.

Some dialogs have a so-called function bar on the bottom line. The functions contained therein can be selected with the arrow keys [⇦] or [⇨] and executed with [OK].

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

4.2.3 Navigating in the dialog

The selection bar is displayed in inverted style. Use the arrow keys [⇧] and [⇩] to move the selection bar upward or downward one line at a time. If

a dialog text is marked with "＞", then additional settings are available in a subordinate dialog. Use [OK] to access this dialog.

Example: System settings

Use the [BACK] key to return to the next higher level.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

4.2.4 Entering text and numbers

In the editing dialog for text or numerical input you can select the individual characters with the arrow keys. Use [OK] to apply the character in the input field. The following functions are available:

4 Operation

Editing function

Description

Accept The modification is applied and the editing dialog

is exited.

Cancel The editing dialog is exited without applying the

modification.

Clear The content of the input field is deleted com-

pletely.

The character left of the cursor is deleted (backspace).

Text editor only

The cursor within the input field is shifted to the left by one character each time that [OK] is pressed.

Text editor only

The cursor within the input field is shifted to the right by one character each time that [OK] is pressed.

876 Dosimat plus

[BACK] The modification is applied and the editing dialog

is exited.

The [BACK] key has the same function as Accept.

A commercially available USB keyboard can be connected to make it easier to enter text and numbers. The key assignment on the PC keyboard is described in chapter 8.4.2, page 54.

￭￭￭￭￭￭￭￭

4.3 Methods

4.2.5 Selecting from a selection list

In a selection list, select the individual entries with the arrow keys [⇧] and [⇩]. Accept the selection with [OK] or [BACK].

4.3 Methods

4.3.1 Method templates

The 876 Dosimat plus contains method templates which are already configured and which can be adjusted to individual requirements.

The following method templates can be selected:

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

DOS Manual interactive dosing with optional calculat-

XDOS Automatic dosing with freely selectable specifi-

You will find a detailed description of the methods in chapter .

4.3.2 Creating a new method

Proceed as follows to create a new method:

Open the method table

￭ In the main dialog, select Method and press [OK].

The method table opens:

ing results.

For manual titrations.

cations.

The following specifications are possible:

￭ Volume and time ￭ Volume and dosing rate ￭ Dosing rate and time

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Select the method template

￭ In the function bar, select New and press [OK].

The list of method templates opens:

4 Operation

Load the method template

￭ Select the desired template and press [OK].

The method template is now loaded and is displayed in the main dialog under Method.

If a new method has been created, then the individual parameters can be modified under Menu ▶ Parameters.

4.3.3 Saving a method

If you modify method parameters, then you can save these as your own method. A maximum of 100 methods can be saved.

To save a method, proceed as follows:

Open the method table

￭ In the main dialog, select Method and press [OK].

The method table opens:

876 Dosimat plus

￭￭￭￭￭￭￭￭

4.3 Methods

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Modify/apply the method name

￭ In the function bar, select Store and press [OK].

A method name will be suggested for new methods. If the method has already been saved once, then the method name will be displayed:

Apply the name:

￭ Press [BACK].

The method will be saved and the method table is displayed.

Enter a new name:

￭ Press [OK].

The text editor opens.

￭ Enter a method name (max. 12 characters) and apply with

Accept or [BACK].

￭ Press [BACK].

The method will be saved and the method table is displayed.

4.3.4 Loading a method

To load a method, proceed as follows:

Open the method table

￭ In the main dialog, select Method and press [OK].

The method table with the stored methods opens:

￭￭￭￭￭￭￭￭

Select a method

￭ Select the desired method.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Load the method

￭ In the function bar, select Load and press [OK].

The method is now loaded and is displayed in the main dialog under Method.

4.3.5 Exporting a method

The methods can be exported on a connected USB stick.

This function is possible only if a USB stick is connected as an external storage medium.

To export a method, proceed as follows:

Open the method table

￭ In the main dialog, select Method and press [OK].

4 Operation

Note

The method table with the stored methods opens:

Select a method

￭ Select the desired method.

Export the method

￭ In the function bar, select Export and press [OK].

The method is being exported. The directory structure on the USB stick is listed in chapter 5.3, page 33.

876 Dosimat plus

￭￭￭￭￭￭￭￭

4.4 Stirrer operation

You can control a connected stirrer directly in the main dialog.

Proceed as follows:

Set the stirring rate

￭ Use the arrow key [↓] to select the Stirrer entry. ￭ In the function bar, select the Stir- or Stir+ function.

The stirring rate will be increased or decreased by one step each time the [OK] key is pressed. The algebraic sign changes the direction in which the stirring is done. When the stirrer is viewed from above, this means:

– "+": counterclockwise rotation – "–": clockwise rotation

Switch on the stirrer

￭ In the function bar, select the on function and press [OK].

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

The stirrer is started and stirs at the rate which has been set. Off is now displayed in the function bar.

Switch off the stirrer

￭ In the function bar, select the off function and confirm with

[OK].

The stirrer is stopped.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

4.5 Entering sample data

Menu ▶ Sample data

In the dosing mode DOS, a sample size can be used for calculation.

The sample size can be entered using the keypad (in the main menu under Sample data) or transferred directly from a balance by means of a cable connection. When using direct data transfer from a balance, care must be taken to ensure that the settings for data transfer on the 876 Dosimat plus and on the balance are in agreement (see page 35).

Sample size

Sample size.

Input range –999999999 ... 9999999999 Default value 1.0

Unit

Unit of the sample size.

4 Operation

Selection g | mg | µg | mL | µL | pieces | User-defined Default value g

User-defined

A user-defined unit can be created. This will be added to the selection list. The previous entry will be overwritten as soon as the new unit has been defined.

4.6 Preparing the buret unit (PREP)

The PREP function is used to rinse the cylinder and tubings of the buret unit and fill them air bubble-free. You should carry out this function once per day.

Proceed as follows:

￭ In the main dialog, select Menu and press [OK].

The main menu opens.

￭ Select the menu item Prepare buret unit and press [OK].

If an 805 Dosimat for tandem dosing is connected to the instrument, select the first or second Dosimat afterwards.

876 Dosimat plus

The following message is displayed:

￭￭￭￭￭￭￭￭

4.7 Printing a report manually

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Start the preparing

Caution

Make sure that the buret tip is directed into a vessel that can accommodate the cylinder volume of your buret unit several times over.

￭ Select Yes and confirm the message with [OK].

Preparing is carried out.

4.7 Printing a report manually

Menu ▶ Print reports

To print a report manually, proceed as follows:

Open the main menu

￭ In the main dialog, select Menu and press [OK].

Open the print dialog

￭ Select the menu item Print reports and press [OK].

The dialog window with the available reports opens:

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

4 Operation

Select a report

￭ Select the desired report and press [OK].

The report is being printed out.

The following reports can be printed out manually:

Results Result report with determination properties,

sample data, calculated results, etc.

Parameters Report with all method parameters of the loaded

method.

System System report with system settings, solution list,

external devices, etc.

PC/LIMS Machine-readable report with all of the data for

a determination. This report can be saved as a TXT file on a connected USB stick or sent to a terminal program or to a LIMS via an RS-232 interface. The definition is made in the system settings (see "PC/LIMS report", page 34).

876 Dosimat plus

￭￭￭￭￭￭￭￭

5.1 Basic settings

5 System settings

5.1 Basic settings

Menu ▶ System ▶ Settings

This chapter contains a description of general instrument settings.

User name

A user name can be entered here for the report. This parameter will only be printed if a user has been defined.

Entry max. 12 characters Default value empty

Instrument name

An instrument name can be entered here for the report. This parameter will only be printed if a designation has been defined.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Serial number

Program version

Time

Date

Language

Entry max. 10 characters Default value empty

Serial number of the instrument. This is printed as a component of the instrument identification in the report header.

Version number of the instrument software. This is printed as a component of the instrument identification in the report header.

Current time. Only valid numbers can be entered.

Format: hh:mm:ss

Current date. Only valid numbers can be entered.

Format: YYYY:MM:DD

Setting the dialog language. In addition to English one further language can be selected.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Dialog type

5 System settings

Note

A second language must be installed in advance in order to be able to select it here. The installation may only be carried out by competent personnel.

The user dialog can be limited for routine operations. One can operate normally with methods in the limited dialog. However, no settings can be made or methods deleted.

The resetting of the dialog does not take effect until the main menu is exited.

The limitation of the dialog has the following effects:

￭ The menu items System and Parameters are not shown in the main

menu.

￭ Methods can only be loaded, but not deleted, exported or created.

Note

If the limited dialog is activated for routine operations, then the expert dialog cannot be switched on during running operations. To change the dialog type, the 876 Dosimat plus must be switched off and then back on again. The expert dialog can be forced at the time the instrument is started. Then it is possible to enter whatever settings one wishes, e.g. the changing of the dialog type. If the instrument is switched off again without changing the dialog type, then the routine dialog will remain activated.

Forcing the expert dialog:

￭ Switch on the instrument. ￭ Wait for the display of the instrument logo with the lettering easy,

safe, precise.

￭ Press the [STOP] key once again and hold it down while also briefly

pressing the [BACK] key.

￭ Release both keys once again.

Selection

Expert | Routine

Default value Expert

876 Dosimat plus

Expert

Complete dialog.

Routine

Limited dialog for routine operations.

￭￭￭￭￭￭￭￭

5.1 Basic settings

Contrast

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

The contrast of the display can be adjusted with the arrow keys [⇦] and [⇨].

￭ [⇦]: the contrast will be decreased by one step each time the key is

pressed.

￭ [⇨]: the contrast will be increased by one step each time the key is

pressed.

Input range 150 ... 240 Default value 212

Note

Alternatively, the contrast can also be modified in the following manner:

Keep the red [STOP] key pressed down. As soon as the progress bar appears, also press the arrow key [⇩] or [⇧] repeatedly.

Beep

PREP warning

This method will however cause the contrast to be modified by several steps.

If this parameter is activated, then a short beep will be heard in the following cases:

￭ When a key is pressed. ￭ At the end of the determination.

Selection on | off Default value on

If this parameter is activated, then the recommendation to carry out the PREP (preparing) function will be displayed in the following cases:

￭ After the instrument has been switched on. ￭ Each time a buret unit has been attached.

This function causes all tubings and the cylinder to be rinsed (see Chapter

8.1.2, page 51).

￭￭￭￭￭￭￭￭

Selection on | off Default value on

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

5.2 Managing solutions

5.2.1 General

Menu ▶ System ▶ Solutions

Solutions can be used in intelligent buret units or in non-intelligent buret units. Intelligent buret units have a built-in data chip on which the data for the reagent is stored. This data is automatically read out during attachment and entered in the solution list.

The name and the type are specified for each solution in the solution list. The asterisk (*) on the right-hand side indicates that this buret unit is attached (only for intelligent buret units). An unlimited number of solutions in buret units with data chip can be added to the solution list. The number of solutions in buret units without data chip is limited to 10 items.

5 System settings

Meaning of the type:

￭ EU: exchange unit without data chip ￭ IEU: exchange unit with integrated data chip

Edit solution

Edit the data of the selected solution, see following chapter.

New

Add a new solution to the list, see following chapter.

Delete

Delete the selected solution from the list.

5.2.2 Editing the solution data

Name

The designation of the solution is used for unambiguous identification.

Entry max. 24 characters Default value empty

Type

The model of the buret unit is displayed.

876 Dosimat plus

￭￭￭￭￭￭￭￭

5.2 Managing solutions

Cylinder volume

Concentration

Concentration unit

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Cylinder volume of the buret unit in mL. The cylinder volume is automatically read out with intelligent buret units.

Selection 1 | 5 | 10 | 20 | 50 Default value 20

Concentration of the solution.

Input range –999999999 ... 9999999999 Default value 1.000

Unit of the concentration.

µg/L | ppm | % | mEq/L | User-defined

Default value mol/L

Titer

Titer unit

User-defined

A user-defined unit can be created. This will be added to the selection list. The previous entry will be overwritten as soon as the new unit has been defined. A blank entry can be generated this way as well.

Titer of the solution.

Input range –999999999 ... 9999999999 Default value 1.000

Unit of the titer.

µg/L | ppm | % | mEq/L | empty | User-defined

Default value empty

User-defined

Date titer det.

Monitoring

￭￭￭￭￭￭￭￭

Date of the last titer determination.

Activating and deactivating the titer monitoring.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Selection on | off Default value off

Time interval

This parameter is visible only when Monitoring = on.

You will be notified that this time interval (in days) has elapsed when starting a method. You can then select whether or not you would still like to start the method.

Input range 1 ... 999 d Default value 999 d

5.3 File management

Menu ▶ System ▶ File management

Note

5 System settings

Import

Delete

Backup

This menu item is visible only when a USB stick has been connected as an external storage medium.

Methods can be imported and deleted from a USB stick in this dialog. Only methods located in the Files directory are displayed in the list (see "Directory structure on the USB stick", page 34).

A backup can be made of the system (all data and settings). Similarly, an existing backup can be reloaded.

Import the selected method.

Delete the selected method.

Create a backup of all data and settings on the USB stick.

Note

Only one backup can be created on the same USB stick.

Restore

876 Dosimat plus

If a backup has already been stored on the stick, then it will be overwritten when this function is carried out again.

Load the backup from a connected USB stick.

￭￭￭￭￭￭￭￭

5.4 Configuring external devices

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Directory structure on the USB stick

A directory with the instrument number is generated on the USB stick. The structure within the directory appears as follows:

Figure 16 Directory structure on the USB stick

Backup All of the files of the backup are stored in this

directory. The directory will be created the first time a backup is created.

Files Exported methods will be stored in this directory.

The directory will be created the first time a method is exported.

Only methods being located in this directory can be imported.

5.4 Configuring external devices

Menu ▶ System ▶ External devices

PC/LIMS report

Specification of the memory location for the PC/LIMS report. The PC/LIMS report is a machine-readable report with all of the data important for a determination. It can be saved as follows:

￭ as a TXT file on a USB stick. ￭ to a LIMS via an RS-232 interface. The 6.2148.030 RS-232/USB Box is

required for this purpose.

Selection COM2 | USB Stick Default value USB Stick

COM2

The report is sent via the serial COM2 interface. The interface parameters set in the dialog COM2 settings are used (see "Editing the COM2 settings", page 36).

USB Stick

The report will be saved as a TXT file on the USB stick in the folder

pc_lims_report.

Printer

￭￭￭￭￭￭￭￭

If a printer is connected, then the printer type needs to be defined here in order for the reports to be printed out correctly.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Keyboard layout

Balance

5 System settings

The printers that have the designation ESC-POS are so-called POS printers (point-of-sale printers), i.e. they print on continuous paper.

Selection Citizen (ESC-POS) | Custom (ESC-POS) | Epson |

Epson (ESC-POS) | HP DeskJet | HP LaserJet | Seiko (ESC-POS)

Default value HP DeskJet

A commercially available USB keyboard can be connected to make it easier to enter text and numbers. Specify the country-specific keyboard layout here.

Selection English US | French FR | German CH | German

DE | Spanish ES

Default value English US

If you have connected a balance, then you have to specify the balance type here.

Selection AND | Mettler | Mettler AT | Mettler AX |

Ohaus | Precisa | Sartorius | Shimadzu

Default value Sartorius

The following table indicates the balance type that needs to be selected for the balance model:

Balance

Balance type

AND AND

Mettler AB, AG, AM, PM,

Mettler

XP, XS

Mettler AT Mettler AT

Mettler AX, MX, UMX, PG,

Mettler AX

AB-S

Ohaus Voyager, Explorer,

Ohaus

Analytical Plus

Precisa Precisa

Sartorius Sartorius

876 Dosimat plus

Shimadzu BX, BW Shimadzu

Editing the COM1 settings

Under COM1 settings, the interface parameters for the connected balance are set.

￭￭￭￭￭￭￭￭

5.4 Configuring external devices

Baud rate

Data bits

Stop bits

Parity

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Transfer rate in characters per second.

Selection 1200 | 2400 | 4800 | 9600 | 19200 | 38400 |

57600 | 115200

Default value 9600

Number of data bits.

Selection 7 | 8 Default value 8

Number of stop bits.

Selection 1 | 2 Default value 1

Type of parity testing.

Handshake

Selection even | none | odd Default value none

Type of data transfer protocol.

Selection hardware | software | none Default value hardware

Note

In case of communication problems, try the software handshake (software).

Editing the COM2 settings

Menu ▶ System ▶ External devices ▶ COM2 settings

Under COM2 settings, the interface parameters for devices connected to the RS-232/2 connector of the RS-232/USB Box are set (e.g. PC). The parameters and input ranges are the same as for the COM1 interface.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

5.5 Instrument diagnosis

5.5.1 Loading program versions and language files

Menu ▶ System ▶ Diagnosis

New program versions or language files can be loaded from a USB stick. The corresponding file must be saved on the USB stick in a directory with the instrument number (e.g. 848 or 863).

You can distinguish between language files and program files by noting how the file name is constructed.

Program files

They are instrument-specific. The file name has the following structure:

5XXXyyyy.bin where

5 System settings

XXX =

yyyy =

Instrument type (e.g. 848 for the 848 Titrino plus)

Program version

Language files

They can be recognized by means of the two-digit language code in the file name. A language file contains the dialog texts for various instrument types. It is not instrument-specific. The file name has the following structure:

5848xxxxYY.bin where

xxxx =

YY =

Version number

Language, e.g. DE (German), FR (French), ES (Spanish)

Loading a file

Proceed as follows:

Connect the USB stick

￭ Plug in the USB stick with the 6.2151.100 adapter (USB MINI

(OTG) - USB A) at the USB connector on the instrument.

￭ Switch on the instrument.

Open the update dialog

￭ Under Menu ▶ System ▶ Diagnosis, select the menu item

Software update.

￭ Press [OK].

876 Dosimat plus

￭￭￭￭￭￭￭￭

5.5 Instrument diagnosis

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Open the file selection

￭ Press [OK].

The selection list with the program and language files available on the USB stick is opened.

Select the file

￭ Select the required file with the arrow keys. ￭ Press [OK].

Start the update

￭ Press [START].

The update process is started, it runs automatically. At the end of the process, the instrument is automatically switched off and then back on again. No user intervention is required.

5.5.2 Diagnosis functions

Electronic and mechanical functional groups in Metrohm instruments can and should be checked as part of regular maintenance by specialist personnel from Metrohm. Please ask your local Metrohm agent regarding the precise terms and conditions involved in concluding a corresponding maintenance agreement.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

6 Parameters and dosing modes

6.1 Manual dosing (DOS)

6.1.1 General description

Usage

The dosing mode DOS is particularly suitable for performing manual titrations with indicator. A result can be calculated automatically from the dosed volume and a result report can be printed out. Different calculation variables can be defined in advance as parameters. The parameters as a whole can be saved as a method and then later used where required. We recommend creating different methods depending on the type of titration or sample.

Solutions and buret units

Buret units with or without an integrated data chip can be used for dosing. The solution data, such as the concentration and the titer of the solution, are administered by the 876 Dosimat plus and can be used for calculating results. This requires that the name of the solution be specified under Menu ▶ Parameters.

6 Parameters and dosing modes

Entering sample data

The sample data sample size and unit can be entered before and during a determination under Menu ▶ Sample data.

If a balance is connected, then the sample size and unit can be accepted directly from the balance before or during the determination. This is usually accomplished by pressing the [Print] key on the balance. Note that the configuration of the data transfer of the balance and the settings in the 876 Dosimat plus must match in order for this to take place, see (see page 35). Details concerning configuration and sending of the sample size can be obtained from the operating instructions for your balance.

Performing a determination

In the dosing mode DOS, a dosing is accomplished in steps by pressing the [GO] key on either the instrument or on the Manual Dosing Controller. You can use the parameter Dosing ramp to define whether the dosing is to take place at a constant dosing rate, or whether a dosing step should begin with slowly increasing dosing rate. This is to be particularly recommended for manual titrations.

876 Dosimat plus

￭￭￭￭￭￭￭￭

6.1 Manual dosing (DOS)

The [FILL] key can be used at the end of a determination to initiate the filling of the dosing cylinder. This automatically initiates the calculation of the result and the printing out of a result report, if the appropriate settings have been made; see following chapters.

The result of the calculation is shown under the volume display. The result and the dosing volume can be deleted by pressing the [FILL] key once more.

6.1.2 Selecting a solution

Menu ▶ Parameters

Solution

Selection of the solution from the solution list. We recommend always selecting the solution. Solutions are defined under System ▶ Solutions.

For exchange units with integrated data chip, a check is made in the method run to verify whether the correct solution has been attached. For exchange units without integrated data chip, only the cylinder volume is checked. The validity of the titer is checked for the selected solution at the start of the determination.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Selection Selection of configured solutions | not defined Default value not defined

not defined

No check takes place.

6.1.3 Dosing parameters

Menu ▶ Parameters ▶ Dosing parameters

Dosing rate

The rate at which dosing takes place. The maximum dosing rate depends on the cylinder volume (see Chapter 8.1.1, page 51).

Input range 0.01 ... 150.00 mL/min Selection max. Default value max.

Filling rate

Rate at which the dosing cylinder is to be refilled. The maximum filling rate depends on the cylinder volume (see Chapter 8.1.1, page 51).

Input range 0.01 ... 150.00 mL/min Selection max. Default value max.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

2 4 6 8 10

mL/min

Dosing ramp

6 Parameters and dosing modes

The dosing ramp is a delay in the dosing rate at the time of the start of a dosing step. It is advantageous primarily for manual titrations with indicator, when small volume steps are to be dosed before the equivalence point. The selectable delay time determines after which amount of time (in seconds) the defined dosing rate is to be reached.

Input range 0 ... 10 s Default value 0 s

Figure 17 Dosing ramp, two examples

6.1.4 Calculation

Menu ▶ Parameters ▶ Calculation

The calculation formula is predefined and cannot be edited.

Calculation formula

where:

(Volume - Blank) × Titer × Conc. × Fac-

tor / (Sample size × Divisor)

Volume

Dosed volume

Blank Blank value

Titer Titer of the solution used

Conc. Concentration of the solution used

Factor Factor

Sample size Sample size. The sample size and the associated unit

can be entered under Menu ▶ Sample data. If a balance is connected, then the sample size (with unit) can also be accepted directly from the balance.

Divisor Divisor

876 Dosimat plus

￭￭￭￭￭￭￭￭

6.1 Manual dosing (DOS)

Calculation status

Result name

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Note

If a solution has been selected under Parameters, then the corresponding titer and the concentration will be read out from the solution data under System ▶ Solutions and used for calculations. If this is not the case, then calculations will be made with the Default value 1.

Activating the calculation.

Selection on | off Default value off

The settings for the calculation can be entered as soon as the calculation has been activated.

The result name will be shown in the result display and in the report.

Decimal places

Result unit

Entry 12 characters

Number of decimal places used to display the result.

Input range 0 ... 5 Default value 2

The result unit is displayed and saved together with the result.

Proceed as follows if you wish to delete a selected unit:

Delete the unit entered under User-defined. A blank entry will be generated in the selection list.

Selection % | /pc | L | g | g/L | mL | mg | mg/mL | mol |

mol/L | ppm | User-defined

Default value %

User-defined

A user-defined unit can be created. This will be added to the selection list. The previous entry will be overwritten as soon as the new unit has been defined.

Factor

￭￭￭￭￭￭￭￭

Factor for the calculation formula.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Divisor

Blank

6.1.5 Reports

6 Parameters and dosing modes

Entry 10 digits Default value 1.0

Divisor for the calculation formula.

Entry 10 digits Default value 1.0

The blank value is subtracted from the dosing volume.

Input range 0.0000 ... 1000000 mL Default value 0.0000 mL

Menu ▶ Parameters ▶ Reports

The reports that will be printed out automatically in connection with a determination are defined under Reports.

Results

The result report contains the calculated result and additional specifications.

Selection off | on Default value off

PC/LIMS

The PC/LIMS report is a machine-readable report with all of the data important for a determination. The PC/LIMS report can be saved as a TXT file on a USB storage medium or sent via an RS-232 interface to a LIMS. The output location is defined in the system settings (see "PC/LIMS report", page 34).

The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt.

Selection on | off Default value off

6.1.6 Pulse control

Menu ▶ Parameters ▶ Pulse control

Pulse control

876 Dosimat plus

Activates/deactivates the pulse control. For details about the pulse control, see chapter Pulse control, page 59.

￭￭￭￭￭￭￭￭

6.2 Extended dosing (XDOS)

Autostart at power-on

Reset volume

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Selection off | on Default value off

If the pulse control is activated, dosing is controlled via the remote interface. The [GO] key starts the pulse control and is deactivated afterwards.

If this setting is activated, the pulse control is already activated when switching on the instrument or when loading the method. Manually starting the corresponding method is therefore not necessary.

Selection off | on Default value off

If this setting is activated, the volume display is reset to 0.0000 mL after filling the dosing cylinder. This setting is not valid for the automatic interstage filling.

Selection off | on Default value off

6.2 Extended dosing (XDOS)

6.2.1 General description

Usage

The XDOS dosing mode can be used for a variety of purposes.

Fixed volume dosing

Time-controlled dosing

Dosing according to dosing rate

If continuous dosing without interruption is required, then the 876 Dosimat plus can be operated together with an 805 Dosimat in tandem mode.

The parameters as a whole can be saved as a method and then later used where required.

The volume and the dosing rate are specified.

The volume and the time are specified.

The dosing rate and the time are specified.

￭￭￭￭￭￭￭￭

Solutions and buret units

Buret units with or without an integrated data chip can be used for dosing. The solution data, such as the concentration and the titer of the solution, are managed by the 876 Dosimat plus and are documented at the

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

time of the output of the report. This requires that the name of the solution be specified under Menu ▶ Parameters.

Performing a dosing

Pressing the [GO] key causes the dosing to run automatically. Three dosing criteria are applied for this process. The specified dosing criteria are observed in all cases. The dosing criterion that is not defined in a specific case (volume, time or dosing rate) is calculated by the instrument and shown on the display. The dosing is optimized according to the specifications. Continuous dosing is ensured in tandem operation, if the dosing and filling rates have been set accordingly.

The dosing can be canceled with the [FILL] key. If the Auto fill parameter is switched on, then the dosing cylinder will be filled.

The dosing criteria are shown on the display. They can be deleted by pressing the [FILL] key once again.

6.2.2 Selecting a solution

Menu ▶ Parameters

6 Parameters and dosing modes

Solution

Selection of the solution from the solution list. We recommend always selecting the solution. Solutions are defined under System ▶ Solutions.

Selection Selection of configured solutions | not defined Default value not defined

not defined

No check takes place.

6.2.3 Selecting the operating mode

Menu ▶ Parameters

Buret setup

If continuous dosing without interruption is required, then the tandem mode can be selected. An additional 805 Dosimat is required for this purpose.

876 Dosimat plus

Selection Single | Tandem Default value Single

￭￭￭￭￭￭￭￭

6.2 Extended dosing (XDOS)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Single

Dosing with one instrument.

Tandem

Dosing with two Dosimats.

Tandem operation

An 805 Dosimat is connected to the MSB connector of the 876 Dosimat plus for tandem operation.

Note

Two exchange units with the same cylinder size must be used for tandem operation.

The principle of tandem dosing:

￭￭￭￭￭￭￭￭

Figure 18

Tandem operation

The two Dosimats operate alternately during dosing. If the dosing cylinder of one Dosimat needs to be filled, then the second Dosimat will take over the control of the dosing. The same dosing and filling speeds apply respectively for both Dosimats.

Because it takes the flat stopcock approximately 2 seconds to switch over, the filing rate must be greater than the dosing rate. Continuous dosing cannot be ensured otherwise.

Note

Maximum applicable dosing rate = 0.85 x filling rate

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

6.2.4 Dosing parameters

Menu ▶ Parameters ▶ Dosing parameters

Dosing criteria

Selection of the preset dosing criteria.

Selection Rate/Time | Volume/Rate | Volume/Time Default value Volume/Rate

Rate/Time

Dosing is carried out at the selected dosing rate for the amount of time specified. The time is also running while the cylinder is being filled.

Volume/Rate

The volume specified is dosed at the selected dosing rate.

Volume/Time

The volume specified is dosed for the time period selected. The dosing rate necessary for this, is calculated according to these specifications. The time needed for filling the dosing cylinder and for switching over the flat stopcock is taken into account thereby.

6 Parameters and dosing modes

Volume

Dosing rate

Filling rate

Volume limit

The volume to be dosed.

Input range 0.0000 ... 99999.9 mL Default value 10.0000 mL

The rate at which dosing takes place. The maximum dosing rate depends on the cylinder volume (see Chapter 8.1.1, page 51).

Input range 0.01 ... 150.00 mL/min Selection max. Default value max.

Rate at which the dosing cylinder is to be refilled. The maximum filling rate depends on the cylinder volume (see Chapter 8.1.1, page 51).

Input range 0.01 ... 150.00 mL/min Selection max. Default value max.

Safety limit for limiting the maximum volume to be dosed.

876 Dosimat plus

Input range 0.01 ... 99999.9 mL

￭￭￭￭￭￭￭￭

6.2 Extended dosing (XDOS)

Auto fill

6.2.5 Reports

Results

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Selection off Default value off

off

No safety limit.

Automatic filling of the cylinder after the dosing.

Selection off | on Default value on

Menu ▶ Parameters ▶ Reports

The reports that will be printed out automatically in connection with a determination are defined under Reports.

The result report contains the calculated result and additional specifications.

PC/LIMS

Selection off | on Default value off

The file name of the TXT file is constructed as follows: PC_LIMS_Report- ID1-YYYYMMDD-hhmmss.txt.

Selection on | off Default value off

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

7 Handling and maintenance

7.1 General

The 876 Dosimat plus requires appropriate care. Excess contamination of the instrument may result in malfunctions and a reduction in the service life of the sturdy mechanics and electronics of the instrument.

Severe contamination can also have an influence on the measured results. Regular cleaning of exposed parts can prevent this to a large extent.

Spilled chemicals and solvents must be removed immediately. Above all, the plug connections (in particular the mains connection socket) should be protected from contamination.

Check all tubing connections regularly for leakage.

7.2 Quality Management and validation with Metrohm

Quality Management

Metrohm offers you comprehensive support in implementing quality management measures for instruments and software. Further information on this can be found in the brochure «Quality Management with Metrohm» available from your local Metrohm agent.

Validation

Please contact your local Metrohm agent for support in validating instruments and software. Here you can also obtain validation documentation to provide help for carrying out the Installation Qualification (IQ) and the Operational Qualification (OQ). IQ and OQ are also offered as a service by the Metrohm agents. In addition, various application bulletins are also available on the subject, which also contain Standard Operat- ing Procedures (SOP) for testing analytical measuring instruments for reproducibility and correctness.

Maintenance

876 Dosimat plus

￭￭￭￭￭￭￭￭

7.2 Quality Management and validation with Metrohm

Note

You can find information on the subjects of quality management, validation and maintenance as well as an overview of the documents currently available at www.metrohm.com/com/ under Support.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

8 Appendix

8.1 Exchange unit

8.1.1 Maximum dosing and filling rate

The maximum dosing rate and maximum filling rate for the exchange unit depend on the cylinder volume:

Cylinder volume Maximum rate

1 mL 3.00 mL/min

5 mL 15.00 mL/min

10 mL 30.00 mL/min

20 mL 60.00 mL/min

50 mL 150.00 mL/min

8 Appendix

Independent of the cylinder volume, values ranging from 0.01 to 150.00 mL/min can always be entered. When the function is carried out the rate will be, if necessary, decreased automatically to the highest possible value.

8.1.2 Parameters for the preparing (PREP)

The PREP function (Preparing) is used to rinse the cylinder and tubings of the exchange unit and fill them air bubble-free. You should carry out this function before the first determination or once per day.

Preparing is carried out with the following, non-alterable settings:

￭ The entire cylinder volume is dosed twice with the maximum dosing

rate.

876 Dosimat plus

￭￭￭￭￭￭￭￭

8.2 Stirring rate

2000

1500

1000

500

-15 -10 -5 0 5 10 15

r/min

8.2 Stirring rate

The stirring rate can be adjusted in steps of –15 to +15.

The approximate rotational speed can be calculated with the following formula:

Example:

Stirring rate set: 8

Rotational speed in rpm = 125 · 8 = 1000

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Rotational speed/min (r/min) = 125 · stirring rate

8.3 Balance

Figure 19

Rotational speed depending on stirring rate

The sample size and the associated unit can be sent from a connected balance. The sample size is transmitted as a number with up to ten characters (including algebraic sign and decimal point).

Sample size and unit are sent as a single character string. They are separated by a space character. The string is terminated with the ASCII characters CR and LF.

If the balance sends a negative sample size (e.g. when reweighing), then the algebraic sign is adopted. The algebraic sign is, however, ignored for the calculations.

Note

With some balances, the sample identification and the method can be sent in addition to the sample size.

Make sure that the balance does not send the sample size until the end.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Mettler AX

For the Mettler AX balance, the fields that contain the sample identification or the method must be designated as follows:

￭ Designation for the field with the method name: METHOD ￭ Designation for the field with sample identification 1: ID1 ￭ Designation for the field with sample identification 2: ID2

8.4 USB devices

USB peripheral devices that are to be connected directly must support the USB 1.0/1.1 (Full Speed) or USB 2.0 (High Speed) standard. The maximum data transfer rate is however in any case 12 MBit/s.

Keyboards, PC mice and barcode readers are so-called HID devices (Human Interface Device) and can be connected via a USB hub only.

8 Appendix

Note

Printers should also be connected via a USB hub. Depending on the manufacturer or printer type a direct connection is however possible.

8.4.1 Numerical USB keypad 6.2147.000

The key [Num Lock] must be pressed for navigating in the dialog. Then the arrow keys are effective.

The respective editing dialog must be opened for the number input.

Table 1

Key of the 876 Dosimat plus or function in the editing dialog

[BACK] [Home]

[⇧] [⇩] [↑] [↓]

[⇦] [⇨] [←] [→]

[OK] [Enter]

Keyboard assignment

Key on the numerical USB keypad

[BS] (backspace)

876 Dosimat plus

Delete [Del]

Accept [Home]

￭￭￭￭￭￭￭￭

8.4 USB devices

8.4.2 Key assignment of a USB keyboard

A commercially available USB keyboard can be connected to make it easier to enter text and numbers.

The respective editing dialog must be opened for text and number inputs.

Table 2 Keyboard assignment

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Key of the 876 Dosimat plus

Key on the USB keyboard or function in the editing dialog

[BACK] [Esc]

[⇧] [⇩] [↑] [↓]

[⇦] [⇨] [←] [→]

[OK] [↲] (enter key)

[Enter] on the numerical keypad

[STOP] [Ctrl] + [S]

[START] [Ctrl] + [G]

[←] (backspace)

Delete [Delete]

Cancel [Strg] + [Q]

Accept [Esc]

8.4.3 Printer

￭￭￭￭￭￭￭￭

Note

The lettering of the USB keyboard can differ from above lettering, depending on the country-specific keyboard used.

The range of USB printers available is extremely varied and constantly changing. The following points must be taken into account when selecting a printer:

￭ USB interface necessary ￭ Printer language: HP-PCL, Canon BJL Commands, Epson ESC P/2 or

ESC/POS

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Note

Inexpensive printers are often designed solely for use with a PC and may not be equipped with one of the printer languages listed above. Such models are not suitable for this reason.

8.5 System initialization

In very rare instances, it could happen that a faulty file system (e.g. because of a program crash) will lead to an impairment of program functioning. The internal file system needs to be initialized in such cases.

Caution

All user data (methods, solutions, etc.) are deleted if a system initialization is carried out. Afterwards, the instrument will have the factory settings again.

8 Appendix

We recommend creating a backup copy of the system at regular intervals in order to avoid data losses.

After a system initialization the program versions and language files do not have to be reloaded. Only the selection of the dialog language may have to be reset in the system settings.

Proceed as follows for system initialization:

Switch off the instrument

￭ Keep the red [FILL] key pressed down for at least 3 s.

A progress bar is displayed. If the key is released during this time, then the instrument will not be switched off.

Switch on the instrument

￭ Keep the red [FILL] key pressed down for approx. 10 s.

The dialog for confirmation of the initialization is displayed for 8 s. The initialization must be confirmed during this time.

876 Dosimat plus

￭￭￭￭￭￭￭￭

8.6 Remote interface

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Confirm the initialization

Note

If the query is not confirmed within 8 s, then the procedure will be interrupted.

￭ Press [BACK] twice.

Initialization is started. The process takes approximately 80 s. The instrument will be automatically restarted after successful initialization.

8.6 Remote interface

8.6.1 Pin assignment of the remote interface

Figure 20

The above figure of the pin assignment applies for all Metrohm instruments with 9-pin D-Sub remote connectors.

Table 3

Pin No. Assignment Function

1 Output 0 Ready/EOD

2 Output 1 -

3 Output 2 -

Pin assignment of remote socket and plug

Inputs and outputs of the remote interface

4 Output 3 Pulse

5 Output 4 Error

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

+5 V

Output 0

Output 1

Output 2

Output 3

Output 4

ready

Error

Start

Stop

Input 0

Input 1

[Fill]

[GO] [Go]

Pulse

8 Appendix

Pin No. Assignment Function

6 0 volt (GND)

7 +5 volts

8 Input 0 Start/Go

9 Input 1 Stop/Fill

Inputs

approx. 5 kΩ Pull-up

tp > 100 ms

active = low, inactive = high

Outputs

Open Collector

tp > 200 ms

active = low, inactive = high

IC = 20 mA, V

CEO

+5 V: maximum load = 20 mA

8.6.2 Status diagram of the remote interface

Dosing mode DOS

= 40 V

Figure 21

876 Dosimat plus

Remote status diagram DOS

￭￭￭￭￭￭￭￭

8.6 Remote interface

Output 0

Output 1

Output 2

Output 3

Output 4

ready

Error

Pulse

Start

Stop

Input 0

Input 1

[Fill]

[GO]

EOD

[Fill]

[GO]

Output 0

Output 1

Output 2

Output 3

Output 4

ready/EOD

Error

Start

Stop

Input 0

Input 1

Pulse

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Dosing mode with pulse control

Figure 22 Remote status diagram DOS with pulse control

Dosing mode XDOS

￭￭￭￭￭￭￭￭

Figure 23

Remote status diagram XDOS

EOD = End of Determination

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

8.7 Pulse control

The 876 Dosimat plus can be controlled by a control device via an electronic pulse control for simple dosing. Controlling is carried out via the 9pin remote interface. The pulse control is integrated in the DOS method (manual dosing), whereby the pulse control replaces the manual dosing. However, all functions of the method (result calculation, report output, etc.) are available.

Remote control

A pulse (≥ 1 ms) on the remote line Input 0 triggers a single dosing step of 1/10000 of the cylinder volume. The smallest volume of a dosing step always depends on the cylinder volume of the exchange unit used.

The dosing pulses are immediately put out at executing on the remote line Output 3 (50…500 µs).

The filling of the dosing cylinder can be triggered on the remote line Input 1.

8 Appendix

Functional assignment of the remote interface:

Pin No.

Assigment Function

1 Output 0 Ready (low)

4 Output 3 Pulse out (low)

5 Output 4 Error (low)

6 GND

8 Input 0 Dosing (low)

9 Input 1 Fill (low)

Further details about the remote interface see Remote interface, page 56.

Autostart pulse control

In order to guarantee an unattended remote control of the 876 Dosimat plus, the parameter "Autostart at power-on" can be activated. The instrument thus starts the loaded method immediately after switching on and is ready to receive and carry out dosing pulses. Pressing the [GO] key for starting the method is therefore not necessary.

Manual interventions

Manual dosing is not possible with activated pulse control. The [GO] key is deactivated. The [FILL] key triggers the filling of the cylinder and at the same time finishes the method.

876 Dosimat plus

￭￭￭￭￭￭￭￭

8.8 Remote control via an RS-232 connection

6.2134.040

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

During a method run, modifying certain parameters is possible as it is in manual dosing.

The instrument shows the "Hold" status during pulse control.

Deactivated parameters

Parameters which directly affect the dosing are inactive during pulse control operation. This includes:

￭ Dosing rate ￭ Dosing ramp

8.8 Remote control via an RS-232 connection

The 876 Dosimat plus can be remote controlled via an RS-232 connection. For this, a 6.2148.030 RS-232/USB Box is necessary. Connect the RS-232/USB Box to the USB interface of the instrument.

The RS-232/USB Box has two connectors for RS-232 devices. The RS-232 remote control only works via the RS-232/2 connector. The RS-232/1 connector is provided for a connection to a balance. Connect the RS-232/2 connector of the RS-232/USB Box to a serial interface (COM1 or COM2, designated with the symbol IOIO) of a PC. Use a 6.2134.040 connection cable.

￭￭￭￭￭￭￭￭

Figure 24

Connecting the RS-232/USB Box to the PC

Interface parameters

We recommend the following parameters for the RS-232 interface COM2:

￭ Baud rate: 19200 ￭ Data bits: 8 ￭ Stop bits: 1 ￭ Parity: none ￭ Handshake: software

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

On the 876 Dosimat plus the interface parameters are set under Menu ▶ System ▶ External devices ▶ COM2 settings.

Transfer protocol

The data communication is synchronous. On each command there is an answer by the instrument.

A command must be sent to the instrument with the control character CR LF as terminator. The answers of the instrument will also be transferred with CR LF as terminator.

The instrument does not send spontaneous messages.

8.8.1 Commands and variables

8 Appendix

Command

Function Comment

$G Start/Continue Corresponds to the key [START] or [Con-

tinue]

$S Stop Corresponds to the key [STOP]

$H Hold Hold the method run

$D Scan instrument sta-

tus

Answers: Ready;0 , Busy;0 , or Hold;0 (0 = no message)

If a message on the instrument requires the interaction of the user, the answer of the status scan displays the corresponding message number. Example:

Busy;010-119

= "Check buret unit"

The message can be quit with [OK] or

[Cancel], see below.

Quit message Confirm the message on the instrument

with [OK]

A mandatory status scan providing the message number must take place immediately before quitting the message, see above.

$A(OK), $A(CANCEL) Quit message Confirm the message with [OK] or [Can-

cel]

$A(YES), $A(NO) Quit message Confirm the message with [Yes] or [No]

$L(method name) Load method The method name has to be known and

unique.

876 Dosimat plus

￭￭￭￭￭￭￭￭

8.8 Remote control via an RS-232 connection

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Command Function Comment

$Q(variable) Request variable value List of variables, see below

Variable Comment

VOLUME Dosed volume

TITER Titer of selected solution

CONC Concentration of selected solution

C00 Sample size (DOS only)

RESULT Result (DOS only)

RATE Dosing rate (XDOS only)

TIME Dosing time (XDOS only)

The values of the variables are only available after the end of a determination (in the status 'ready').

Answer of the instru-

Comment

ment

OK Command executed

E1 Method not found

E2 Invalid variable

E3 Invalid command

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

9 Technical specifications

9.1 Dosing drive

Resolution 10000 steps per cylinder volume

Exchange unit

Cylinder volume ￭ 1 mL

￭ 5 mL ￭ 10 mL ￭ 20 mL ￭ 50 mL

Accuracy Fulfills ISO/DIN standard 8655-3

9.2 Interfaces

9 Technical specifications

USB (OTG) connector

MSB connector For connecting a stirrer or an 805 Dosimat.

Remote connector For connecting instruments with a remote interface.

For connecting USB devices.

9.3 Mains connection

Voltage

Frequency 50…60 Hz

Power consumption

Fuse 2 × 2.0 ATH, electronic overload protection

100…240 V

45 W

876 Dosimat plus

￭￭￭￭￭￭￭￭

9.4 Safety specification

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

9.4 Safety specification

Design and testing According to EN/IEC/UL 61010-1, CSA-C22.2 No. 61010-1

Protection class I, degree of protection IP40

Safety instructions The documentation contains safety instructions which have to be fol-

lowed by the user in order to ensure safe operation of the instrument.

9.5 Electromagnetic compatibility (EMC)

Emission

Standards fulfilled:

￭ EN/IEC 61326-1 ￭ EN/IEC 61000-6-3 ￭ EN 55022 / CISPR 22

Immunity Standards fulfilled:

￭ EN/IEC 61326-1 ￭ EN/IEC 61000-6-2 ￭ 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 61000-4-11 ￭ EN/IEC 61000-4-14 ￭ NAMUR

9.6 Ambient temperature

Nominal function range

+5…+45 °C (at a maximum of 85 % humidity)

Storage –20…+60 °C

Transport –40…+60 °C

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

9.7 Reference conditions

9 Technical specifications

Ambient temperature

Rel. humidity ≤ 60 %

Operating temperature status

Validity of the data

+25 °C ± 3 °C

Instrument in operation at least 30 minutes

After adjustment

9.8 Dimensions

Material of housing

Material of display cover

Width 142 mm

Height 164 mm

Depth 310 mm

Polybutylene terephthalate (PBT)

Glass

Weight 2850 g

876 Dosimat plus

￭￭￭￭￭￭￭￭

10.1 Declaration of Conformity

10 Conformity and warranty

10.1 Declaration of Conformity

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

Electromagnetic compatibility

Safety specifications EN/IEC 61010-1: 2001, UL 61010-1: 2004,

876 Dosimat plus

Versatile dosing instrument with exchangeable buret units for the dispensing of liquids in laboratories.

This instrument has been built and has undergone final type testing according to the standards:

Emission: EN/IEC 61326-1: 2006, EN/IEC 61000-6-3: 2004,

EN 55022 / CISPR 22: 2006

Immunity: EN/IEC 61326-1: 2006, EN/IEC 61000-6-2: 2005,

EN/IEC 61000-4-2: 2001, EN/IEC 61000-4-3: 2002, EN/IEC 61000-4-4: 2004, EN/IEC 61000-4-5: 2001, EN/IEC 61000-4-6: 2001, EN/IEC 61000-4-11: 2004, EN/IEC 61000-4-14: 2004, NAMUR: 2004

CSA-C22.2 No. 61010-1: 2004, protection class I

￭￭￭￭￭￭￭￭

This instrument meets the requirements of the CE mark as contained in the EU directives 2006/95/EC (LVD), 2004/108/EC (EMC). It fulfils the following specifications:

EN 61326-1 Electrical equipment for measurement, control

and laboratory use – EMC requirements

EN 61010-1 Safety requirements for electrical equipment for

measurement, control and laboratory use

This instrument meets the requirements of the ETL Listed Mark for the North American market. It conforms to the electrical safety standards UL 61010-1 and CSA-C22.2 No. 61010-1. This product is listed in Intertek’s Directory of Listed Products.

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Manufacturer Metrohm Ltd., CH-9101 Herisau/Switzerland

Metrohm Ltd. is holder of the SQS certificate ISO 9001:2000 Quality management system for development, production and sales of instruments and accessories for ion analysis.

Herisau, 16 January 2009

10 Conformity and warranty

D. Strohm

Vice President, Head of R&D

10.2 Quality Management Principles

Metrohm Ltd. holds the ISO 9001:2000 Certificate, registration number 10872-02, issued by SQS (Swiss Association for Quality and Management Systems). Internal and external audits are carried out periodically to assure that the standards defined by Metrohm’s QM Manual are maintained.

The steps involved in the design, manufacture and servicing of instruments are fully documented and the resulting reports are archived for ten years. The development of software for PCs and instruments is also duly documented and the documents and source codes are archived. Both remain the possession of Metrohm. A non-disclosure agreement may be asked to be provided by those requiring access to them.

The implementation of the ISO 9001:2000 quality management system is described in Metrohm’s QM Manual, which comprises detailed instructions on the following fields of activity:

Instrument development

The organization of the instrument design, its planning and the intermediate controls are fully documented and traceable. Laboratory testing accompanies all phases of instrument development.

A. Dellenbach

Head of Quality Management

876 Dosimat plus

Software development

Software development occurs in terms of the software life cycle. Tests are performed to detect programming errors and to assess the program’s functionality in a laboratory environment.

Components

All components used in the Metrohm instruments have to satisfy the quality standards that are defined and implemented for our products. Suppliers of components are audited by Metrohm as the need arises.

￭￭￭￭￭￭￭￭

10.3 Warranty (Guarantee)

Manufacture

The measures put into practice in the production of our instruments guarantee a constant quality standard. Production planning and manufacturing procedures, maintenance of production means and testing of components, intermediate and finished products are prescribed.

Customer support and service

Customer support involves all phases of instrument acquisition and use by the customer, i.e. consulting to define the adequate equipment for the analytical problem at hand, delivery of the equipment, user manuals, training, after-sales service and processing of customer complaints. The Metrohm service organization is equipped to support customers in implementing standards such as GLP, GMP, ISO 900X, in performing Operational Qualification and Performance Verification of the system components or in carrying out the System Validation for the quantitative determination of a substance in a given matrix.

10.3 Warranty (Guarantee)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Metrohm guarantees that the deliveries and services it provides are free of errors in materials, design or manufacturing.

The general warranty period is 36 months (exclusions below) from the date of delivery or 18 months in the event of continuous operation. The warranty remains valid on the condition that the service is provided by an authorized Metrohm Service Organization at defined intervals and with a defined scope.

The warranty period for the suppressors "MSM II" and "MSM-HC" is 120 months from the date of delivery or 60 months in the event of continuous operation.

The warranty period for IC separation columns is 12 months from the date of delivery or 6 months in the event of continuous operation. The technical specifications contained in the manual are authoritative for warranty of accuracy.

For third-party components that are recognizable as such, the manufacturer's warranty regulations apply.

Consumables and materials with limited storage life and glass breakage in the case of electrodes or other glass parts are excluded from the warranty.

Warranty claims cannot be asserted if the customer has failed to meet his payment obligations according to schedule.

￭￭￭￭￭￭￭￭

During the warranty period, Metrohm undertakes either to replace free of charge or to credit the purchaser for any instruments, assemblies or com-

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

10 Conformity and warranty

ponents that can be shown to be faulty. Any transport or customs fees that may apply are the ordering party’s responsibility.

The precondition for this is that the ordering party must use the Return Material Authorization (RMA) to report the faulty part, along with specification of the article number, the article designation, an adequate error description, the delivery date and (if applicable) the serial number. In addition, the ordering party undertakes to store the faulty part for at least 2 years in accordance with current storage directives (in compliance with ESD guidelines) and to hold it in readiness for onsite inspection or for return shipment to Metrohm. Metrohm reserves the right to invoice the ordering party for these articles, including retroactively, in the event of noncompliance with these pre-conditions.

Deficiencies arising from circumstances that are not the responsibility of Metrohm, such as improper storage or improper use, etc. are expressly excluded from the warranty.

Metrohm also offers a 120-month spare parts warranty and a 5-year PC software support warranty, calculated from the date on which the product is withdrawn from the market. The content of this warranty is the ability of the customer to obtain functioning spare parts or appropriate software support at market prices during the time of the warranty period.

If Metrohm AG is unable to meet this obligation due to circumstances beyond the control of Metrohm AG, then the ordering party shall be offered alternative solutions at preferential conditions.

876 Dosimat plus

￭￭￭￭￭￭￭￭

11.1 Scope of delivery 2.876.0010

11 Accessories

Note

Subject to change without notice.

11.1 Scope of delivery 2.876.0010

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Qty.

Order no. Description

1 1.876.0010 876 Dosimat plus

Univeral dispenser for use with exchange units.

1 6.2107.100 Manual dosing controller

Manual dosing controller for dosing and manual titration with the Dosimat plus

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Qty. Order no. Description

1 6.2151.100 Adapter USB MINI (OTG) - USB A

For connecting USB instruments.

1 6.2739.010 Wrench

For exchange units.

Length (mm): 190

11 Accessories

1 6.3026.220 Exchange Unit 20 mL

Exchange unit with integrated data chip with 20 mL glass cylinder and light protection. PCTFE/PTFE flat stopcock, FEP tubing connection, anti-diffusion buret tip and standard amber glass reagent bottle.

Volume (mL): 20

1 6.2122.0x0 Mains cable with C13 line socket

IEC-60320-C13

Cable plug according to customer requirements.

Switzerland: Type SEV 12

6.2122.020

Germany, …: Type CEE(7), VII

6.2122.040

USA, …: Type NEMA/ASA

6.2122.070

1 8.876.8003EN 876 Dosimat plus Manual

876 Dosimat plus

￭￭￭￭￭￭￭￭

11.2 Scope of delivery 2.876.0010

Qty. Order no. Description

1 1.801.0010 801 Stirrer

Magnetic Stirrer without stand.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 1.876.0010 876 Dosimat plus

Univeral dispenser for use with exchange units.

1 6.1903.020 Stirring bar / 16 mm

Stirring Bar with magnetic core, PTFE coated, length 16 mm

Material: PTFE Outer diameter (mm): 4 Length (mm): 16

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Qty. Order no. Description

1 6.1903.030 Stirring bar / 25 mm

Stirring Bar with magnetic core, PTFE coated, length 25 mm

Material: PTFE Outer diameter (mm): 5 Length (mm): 25

1 6.2001.060 Support stand without support rod

To attach an 801, 804, 803 Stirrer to a Titrando, Titrino plus, Dosimat plus or 856 and 867.

11 Accessories

1 6.2013.010 Clamping ring

For stand rods of 10 mm diameter

Material: Metal Width (mm): 20 Height (mm): 16

1 6.2016.070 Support rod / 400 mm

Material: Stainless steel 18/9 Outer diameter (mm): 10 Length (mm): 400

876 Dosimat plus

￭￭￭￭￭￭￭￭

11.2 Scope of delivery 2.876.0010

Qty. Order no. Description

1 6.2021.020 Electrode holder

Electrode holder for 4 electrodes and 2 buret tips

Material: Plastic

1 6.2107.100 Manual dosing controller

Manual dosing controller for dosing and manual titration with the Dosimat plus

1 6.2151.100 Adapter USB MINI (OTG) - USB A

For connecting USB instruments.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 6.2621.070 Hexagon key 5 mm

5 mm.

Length (mm): 80

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Qty. Order no. Description

1 6.2621.130 Hexagon key 2 mm

2 mm.

1 6.2739.010 Wrench

For exchange units.

Length (mm): 190

11 Accessories

1 6.3026.220 Exchange Unit 20 mL

Volume (mL): 20

1 6.2122.0x0 Mains cable with C13 line socket

IEC-60320-C13

Cable plug according to customer requirements.

Switzerland: Type SEV 12

6.2122.020

Germany, …: Type CEE(7), VII

6.2122.040

USA, …: Type NEMA/ASA

6.2122.070

1 8.876.8003EN 876 Dosimat plus Manual

876 Dosimat plus

￭￭￭￭￭￭￭￭

11.3 Optional accessories

Qty. Order no. Description

1 2.141.0100 USB Thermal printer Neo's

Compact printer with USB interface, paper width 60 mm (40 characters). Including 6.2151.120 USB cable.

1 2.801.0040 801 Stirrer with support

Magnetic stirrer with base plate, support rod and electrode holder for use with Titrino plus, Titrandos, Sample Processors, 805 Dosimat and 780/781 pH Meters. With permanently attached cable for MSB (Metrohm Serial Bus).

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 2.805.0010 805 Dosimat

Dosing device for Titrando and Sample Processor with read/write hardware for intelligent Exchange Units. With permanently attached cable. Without Exchange Unit.

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Qty. Order no. Description

1 6.2134.120 Cable RS-232 to Mettler AX

Connecting Metrohm RS-232 interface to Mettler AX

1 6.2147.000 Numerical USB keypad

Numerical USB keypad for Titrino plus, Dosimat plus, 862 Compact Titrosampler and 869 Compact Sample Changer. Incl. USB Hub with two connectors.

1 6.2148.030 RS-232/USB Box

Extends the Titrino plus by two RS 232 interfaces for the connection of e.g. balance, PC, LIMS. Requires 6.2151.030 Cable.

11 Accessories

1 6.2151.120 Cable USB MINI (OTG) - USB B, 1.8 m

For connecting USB instruments.

1 6.3026.110 Exchange Unit 1 mL

Exchange Unit with integrated data chip with 1 mL glass cylinder and light protection. PCTFE/PTFE flat stopcock, FEP tubing connection, antidiffusion buret tip and standard amber glass reagent bottle.

Volume (mL): 1

876 Dosimat plus

￭￭￭￭￭￭￭￭

11.3 Optional accessories

Qty. Order no. Description

1 6.3026.150 Exchange Unit 5 mL

Exchange Unit with integrated data chip with 5 mL glass cylinder and light protection. PCTFE/PTFE flat stopcock, FEP tubing connection, anti-diffusion buret tip and standard amber glass reagent bottle.

Volume (mL): 5

1 6.3026.210 Exchange Unit 10 mL

Exchange unit with integrated data chip with 10 mL glass cylinder and light protection. PCTFE/PTFE flat stopcock, FEP tubing connection, anti-diffusion buret tip and standard amber glass reagent bottle.

Volume (mL): 10

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

1 6.3026.250 Exchange Unit 50 mL

Exchange unit with integrated data chip with 50 mL glass cylinder and light protection. PCTFE/PTFE flat stopcock, FEP tubing connection, anti-diffusion buret tip and standard amber glass reagent bottle.

Volume (mL): 50

￭￭￭￭￭￭￭￭

876 Dosimat plus

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Index

Numbers/Symbols

805 Dosimat

Connect ............................. 14

Adapter

Connect ............................. 11

Backup ..................................... 33

Balance .............................. 39, 52

Connect ............................. 10

Balance type ............................. 35

Blank value ............................... 43

Buret unit

Prepare (PREP) .................... 25

Calculation ............................... 41

Calculation formula .................. 41

Contact pins ............................... 6

Contrast ................................... 30

Data chip ................................... 6

Delay ........................................ 41

Diagnosis ................................. 38

Dialog language

Load ................................... 37

Dialog type ............................... 29

Directory structure .................... 34

Divisor ...................................... 43

DOS ......................................... 39

Dosing criteria .......................... 47

Dosing key ................................. 8

Dosing mode .............................. 1

Dosing modes .......................... 39

Dosing parameters ............. 40, 47

Dosing ramp ............................ 41

Dosing rate .............................. 44

Maximum ........................... 51

Electrostatic charge .................... 4

End of Determination EOD ....... 58

Exchange unit

Attach ................................ 15

Expert dialog ............................ 29

Factor ................................. 41, 42

Filling rate

Maximum ........................... 51

Fixed volume ............................ 44

Formula .................................... 41

GLP .......................................... 49

Guarantee ................................ 68

Initialization .............................. 55

Instrument

Switch off ........................... 17

Switch on ........................... 16

Instrument diagnosis ................ 37

Keyboard

Connect ............................. 11

Key assignment .................. 54

Keyboard layout ....................... 35

Keypad

Key assignment .................. 53

Language ................................. 28

Language file

Load ................................... 37

Mains connection ....................... 7

Mains voltage ............................. 4

Maintenance ............................ 49

Manual dosing ......................... 39

Manual Dosing Controller ........... 8

Connect ............................. 10

Method .................................... 20

Create ................................ 20

Delete ................................ 33

Export ................................ 23

Import ................................ 33

Load ................................... 22

Save ................................... 21

Method templates .................... 20

MSB

Connector ............................ 7

MSB 1 ...................................... 14

Navigating ................................ 18

Numerical input ........................ 19

Operation

General .............................. 17

Stirring ............................... 24

Parameters ............................... 39

PC/LIMS report ......................... 34

Pin assignment ......................... 56

Piston rod ................................... 6

PREP

Parameters ......................... 51

Preparing

Parameters ......................... 51

Print ......................................... 26

Printer ................................ 34, 54

Connect ............................. 11

Program version

Update ............................... 37

Quality Management ................ 49

Remote

Connector ............................ 7

Interface ............................. 56

Pin assignment ................... 56

Status diagram ................... 57

Remote cable

Connect ............................. 13

Remote control ........................ 60

Report ................................ 43, 48

Print manually .................... 26

Result ....................................... 42

Routine dialog .......................... 29

RS-232 connection ................... 60

Safety instructions ...................... 3

Sample data

Enter ............................ 25, 39

Sample size .............................. 25

Send from a balance ........... 52

Serial number ............................. 7

Service ....................................... 3

876 Dosimat plus

￭￭￭￭￭￭￭￭

Index

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭

Service Agreement ................... 49

Solution .................................... 31

Add .................................... 31

Solution

Delete ................................ 31

Edit solution ....................... 31

Solution

Select ........................... 40, 45

Status LED .................................. 8

Stirrer

Connect ............................... 9

Operate .............................. 24

Stirring rate ........................ 24, 52

Stop key ..................................... 8

Switch off ................................. 17

Switch on ................................. 16

System initialization .................. 55

Tandem operation .............. 14, 46

Text input ................................. 19

Time-controlled dosing ............. 44

Titration ................................... 39

Type plate .................................. 7

Uninterrupted ........................... 45

Unit .......................................... 42

Update ..................................... 37

USB .......................................... 53

Keyboard ............................ 54

Keypad ............................... 53

USB (OTG)

Connector ............................ 7

USB device

Adapter .............................. 11

Connect ............................. 11

User name ................................ 28

Validation ................................. 49

Warranty .................................. 68

XDOS ....................................... 44

￭￭￭￭￭￭￭￭

876 Dosimat plus

Metrohm 876 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

Table of figures

1.1 Instrument description

1.1.1 Dosing modes

1 Introduction

1.1.2 Connectors

1.2 Intended use

1.3 About the documentation

1.3.1 Symbols and conventions

1.4 Safety instructions

1.4.1 General notes on safety

1.4.2 Electrical safety

1.4.3 Tubing connections

1.4.4 Flammable solvents and chemicals

1.5 Recycling and disposal

2.1 876 Dosimat plus

2 Overview of the instrument

2.2 Manual Dosing Controller

3.1 Setting up the instrument

3.1.1 Packaging

3.1.2 Checks

3.1.3 Location

3 Installation

3.2 Connecting a stirrer

3.3 Connecting the Manual Dosing Controller

3.4 Connecting a balance

3.6 Connecting instruments to the remote connector

3.7 Connecting the 805 Dosimat

3.8 Attaching the exchange unit

4.1 Switching the instrument on and off

4 Operation

4.2 Fundamentals of operation

4.2.1 The keypad

4.2.2 Structure of the dialog windows

4.2.3 Navigating in the dialog

4.2.4 Entering text and numbers

4.3 Methods

4.2.5 Selecting from a selection list

4.3.1 Method templates

4.3.2 Creating a new method

4.3.3 Saving a method

4.3.4 Loading a method

4.3.5 Exporting a method

4.4 Stirrer operation

4.5 Entering sample data

4.6 Preparing the buret unit (PREP)

4.7 Printing a report manually

5.1 Basic settings

5 System settings

5.2 Managing solutions

5.2.1 General

5.2.2 Editing the solution data

5.3 File management

5.4 Configuring external devices

5.5 Instrument diagnosis

5.5.1 Loading program versions and language files

5.5.2 Diagnosis functions

6.1 Manual dosing (DOS)

6.1.1 General description

6 Parameters and dosing modes

6.1.2 Selecting a solution

6.1.3 Dosing parameters

6.1.4 Calculation

6.1.5 Reports

6.1.6 Pulse control

6.2 Extended dosing (XDOS)

6.2.1 General description

6.2.2 Selecting a solution

6.2.3 Selecting the operating mode

6.2.4 Dosing parameters

6.2.5 Reports

7 Handling and maintenance

7.1 General

7.2 Quality Management and validation with Metrohm

8.1 Exchange unit

8.1.1 Maximum dosing and filling rate