Metrohm Dosimat plus 876 User manual

876 Dosimat plus
Manual
8.876.8003EN / 2019-12-05

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
876 Dosimat plus
Manual
8.876.8003EN / 2019-12-05

Technical Communication
Metrohm AG
CH-9100 Herisau
[email protected]
This documentation is protected by copyright. All rights reserved.
This documentation has been prepared with great care. However, errors
can never be entirely ruled out. Please send comments regarding possible
errors to the address above.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
876 Dosimat plus ￭￭￭￭￭￭￭￭ III
Table of contents
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 and capillary connections ............................................. 4
1.4.4 Flammable solvents and chemicals ........................................... 5
1.4.5 Recycling and disposal ............................................................. 5
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
3.9 Connecting the instrument to the power grid ................. 16
4 Operation 17
4.1 Switching the instrument on and off ................................ 17
4.2 Fundamentals of operation ............................................... 18
4.2.1 The keypad ............................................................................ 18
4.2.2 Structure of the dialog windows ............................................ 18

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 876 Dosimat plus
4.2.3 Navigating in the dialog ......................................................... 19
4.2.4 Entering text and numbers ..................................................... 19
4.2.5 Selecting from a selection list ................................................. 20
4.3 Methods .............................................................................. 21
4.3.1 Method templates ................................................................. 21
4.3.2 Creating a new method ......................................................... 21
4.3.3 Saving a method ................................................................... 22
4.3.4 Loading a method ................................................................. 23
4.3.5 Exporting a method ............................................................... 24
4.4 Stirrer operation ................................................................. 25
4.5 Entering sample data ......................................................... 26
4.6 Preparing the buret unit (PREP) ........................................ 27
4.7 Printing a report manually ................................................. 28
5 System settings 30
5.1 Basic settings ...................................................................... 30
5.2 Managing solutions ............................................................ 33
5.2.1 General ................................................................................. 33
5.2.2 Editing the solution data ........................................................ 33
5.3 File management ................................................................ 35
5.4 Configuring external devices ............................................. 36
5.5 Instrument diagnosis .......................................................... 39
5.5.1 Loading program versions and language files ......................... 39
5.5.2 Diagnosis functions ............................................................... 40
6 Parameters and dosing modes 41
6.1 Manual dosing (DOS) ......................................................... 41
6.1.1 General description ................................................................ 41
6.1.2 Selecting a solution ............................................................... 42
6.1.3 Dosing parameters ................................................................ 42
6.1.4 Calculation ............................................................................ 43
6.1.5 Reports .................................................................................. 45
6.1.6 Pulse control .......................................................................... 46
6.2 Extended dosing (XDOS) .................................................... 47
6.2.1 General description ................................................................ 47
6.2.2 Selecting a solution ............................................................... 48
6.2.3 Selecting the operating mode ................................................ 48
6.2.4 Dosing parameters ................................................................ 49
6.2.5 Reports .................................................................................. 50
7 Operation and maintenance 52

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
876 Dosimat plus ￭￭￭￭￭￭￭￭ V
8 Appendix 53
8.1 Exchange unit ..................................................................... 53
8.1.1 Maximum dosing and filling rate ............................................ 53
8.1.2 Parameters for the preparing (PREP) ....................................... 53
8.2 Stirring rate ......................................................................... 54
8.3 Balance ................................................................................ 54
8.4 USB devices ......................................................................... 55
8.4.1 6.2147.000 numerical USB keypad ........................................ 55
8.4.2 Key assignment of a USB keyboard ........................................ 56
8.4.3 Printer ................................................................................... 57
8.5 System initialization ........................................................... 57
8.6 Remote interface ................................................................ 58
8.6.1 Pin assignment of the remote interface .................................. 58
8.6.2 Status diagram of the remote interface .................................. 59
8.7 Pulse control ....................................................................... 61
8.8 Remote control via an RS-232 connection ....................... 62
8.8.1 Commands and variables ....................................................... 63
9 Technical specifications 65
9.1 Dosing drive ........................................................................ 65
9.2 Interfaces ............................................................................. 65
9.3 Power connection ............................................................... 65
9.4 Ambient temperature ......................................................... 66
9.5 Reference conditions .......................................................... 66
9.6 Dimensions .......................................................................... 66
10 Accessories 67
Index 68

Table of figures ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
VI ￭￭￭￭￭￭￭￭ 876 Dosimat plus
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 ................................................................ 18
Figure 16 Directory structure on the USB flash drive ........................................ 36
Figure 17 Dosing ramp, two examples ............................................................ 43
Figure 18 Tandem operation ........................................................................... 49
Figure 19 Rotational speed depending on the stirring rate ............................... 54
Figure 20 Pin assignment of remote socket and remote plug ........................... 58
Figure 21 Remote status diagram DOS ............................................................ 59
Figure 22 Remote status diagram DOS with pulse control ............................... 60
Figure 23 Remote status diagram XDOS .......................................................... 60
Figure 24 Connecting the RS-232/USB Box to the PC ...................................... 62

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
876 Dosimat plus ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 876 Dosimat plus is an all-purpose dosing device. Methods can be
created and saved under a new name. If a USB flash drive is connected as
an external storage medium, the methods can be exported to a connected
USB flash drive. This function allows you to copy methods quickly and
easily from one device to another. The remote connector makes it possible
to integrate the device into a Metrohm automation system.
1.1.1 Dosing modes
The following dosing modes are supported:
￭DOS
Manual dosing.
￭XDOS
Fixed volume dosing, with user-selectable dosing criteria.
1.1.2 Connectors
The instrument is equipped with the following connectors:
￭MSB connector (Metrohm Serial Bus)
For connecting a stirrer and an 805 Dosimat for tandem dosings.
￭USB (OTG) connector
The 6.2151.100 adapter can be used to connect, for example, a
printer, a USB flash drive or a USB keyboard. The 6.2151.120 cable can
be used to connect a printer directly.
￭Remote connector
For connecting the dosing handle, a Titrino plus or a sample changer.

1.2 Intended use ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 876 Dosimat plus
1.2 Intended use
The 876 Dosimat plus has been designed for use in laboratories and pro-
duction companies. Its main area of use is the precise dosing of liquids.
This includes simple dosing according to specific criteria and manual titra-
tions.
This instrument is suitable for dosing chemicals and flammable solvents.
Usage of the 876 Dosimat plus therefore requires the user to have basic
knowledge and experience in handling toxic 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 the user must follow in order to ensure safe opera-
tion of the instrument.
1.3.1 Symbols and conventions
The following symbols and formatting may appear in this documentation:
Cross-reference to figure legend
The first number refers to the figure number, the sec-
ond to the instrument part in the figure.
Instruction step
Carry out these steps in the sequence shown.
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
WARNING
This symbol draws attention to a possible life-threat-
ening hazard or risk of injury.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
876 Dosimat plus ￭￭￭￭￭￭￭￭ 3
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 possible damage to
instruments or instrument parts.
NOTE
This symbol highlights additional information and
tips.
1.4 Safety instructions
1.4.1 General notes on safety
WARNING
Operate this instrument only according to the information contained in
this documentation.
This instrument 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.

1.4 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 876 Dosimat plus
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.
Supply voltage
WARNING
An incorrect supply voltage can damage the instrument.
Only operate this instrument with a supply voltage specified for it (see
rear panel of the instrument).
Protection against electrostatic charges
WARNING
Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.
Do not fail to pull the power cord out of the power socket before you
set up or disconnect electrical plug connections at the rear of the
instrument.
1.4.3 Tubing and capillary connections
CAUTION
Leaks in tubing and capillary connections are a safety risk. Tighten all
connections well by hand. Avoid applying excessive force to tubing con-
nections. Damaged tubing ends lead to leakage. Appropriate tools can
be used to loosen connections.
Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are manda-
tory.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
876 Dosimat plus ￭￭￭￭￭￭￭￭ 5
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 (e.g. fume cup-
board).
￭Keep all sources of flame far from the workplace.
￭Clean up spilled liquids and solids immediately.
￭Follow the safety instructions of the chemical manufacturer.
1.4.5 Recycling and disposal
This product is covered by European Directive 2012/19/EU, WEEE – Waste
Electrical and Electronic Equipment.
The correct disposal of your old instrument will help to prevent negative
effects on the environment and public health.
More details about the disposal of your old instrument can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.

2.1 876 Dosimat plus ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 876 Dosimat plus
2 Overview of the instrument
2.1 876 Dosimat plus
2
5
4
3
1
Figure 1 Front 876 Dosimat plus
1Piston rod
Of the dosing drive.
2Contact pins
For the data chip.
3Coupling
For switching the flat stopcock.
4Display
5Keypad

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument
876 Dosimat plus ￭￭￭￭￭￭￭￭ 7
1
25
4
3
Figure 2 Rear 876 Dosimat plus
1Type plate
Contains specifications concerning mains
voltage and serial number.
2Mains connection socket
3USB (OTG) connector
For connecting printers, USB sticks, USB
hubs, etc.
4MSB connector
Metrohm Serial Bus.
For connecting a stirrer or an 805 Dosimat.
Mini DIN, 9-pin.
5Remote connector
For connecting the Manual Dosing Control-
ler or instruments with a remote interface.
D-Sub, 9-pin.

2.2 Manual Dosing Controller ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 876 Dosimat plus
2.2 Manual Dosing Controller
1
23
4
Figure 3 Manual Dosing Controller 6.2107.100
1Dosing key
To start the dosing.
2Status LED
Indicates the readiness of the instrument.
3Stop key/Fill key
For stopping and filling the dosing cylinder.
4Connection cable
With 9-pin D-Sub plug.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
876 Dosimat plus ￭￭￭￭￭￭￭￭ 9
3 Installation
3.1 Setting up the instrument
3.1.1 Packaging
The instrument is supplied in protective packaging together with the sepa-
rately 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 com-
plete 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.
Place the instrument in a location of the laboratory which is suitable for
operation and free of vibrations and which provides protection against
corrosive atmosphere and contamination by chemicals.
The instrument should be protected against excessive temperature fluctua-
tions 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)
Figure 4 Connecting a stirrer

3.3 Connecting the Manual Dosing Controller ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 876 Dosimat plus
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 Connecting a balance
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).
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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
876 Dosimat plus ￭￭￭￭￭￭￭￭ 11
The parameters for the RS-232 interface on the instrument must match
those on the balance (see "Editing the COM1 settings", page 37). Addi-
tionally consult the user manual of the balance.
3.5 Connecting a keyboard, printer and other USB devi-
ces
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.
6.2151.100
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 numer-
ical input and for navigating in the dialog. In addition, it provides two USB
connectors. Connect additional USB devices to the keypad.

3.5 Connecting a keyboard, printer and other USB devices ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 876 Dosimat plus
NOTICE
Most of the USB devices need a so-called hub in order to work cor-
rectly.
A USB hub is a distributor to which several USB devices can be con-
nected. USB hubs are available in specialty stores in a number of differ-
ent 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 elec-
tricity requirements.
Also observe the instructions in chapter 8.4, page 55.
Examples:
USB MINI (OTG)-USB
USB stick
6.2151.100
Figure 8 Connecting the USB stick