Metrohm Titrando 851 User manual

851 Titrando
Manual
8.851.8004EN / 2020-02-11

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
851 Titrando
Manual
8.851.8004EN / 2020-02-11

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
851 Titrando ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 The Titrando system ............................................................. 1
1.2 Instrument description ......................................................... 2
1.3 Titration modes – Measuring modes – Dosing com-
mands .................................................................................... 2
1.4 About the documentation ................................................... 3
1.4.1 Symbols and conventions ........................................................ 3
1.5 Safety instructions ................................................................ 4
1.5.1 General notes on safety ........................................................... 4
1.5.2 Electrical safety ........................................................................ 4
1.5.3 Working with liquids ................................................................ 5
1.5.4 Flammable solvents and chemicals ........................................... 6
1.5.5 Recycling and disposal ............................................................. 6
2 Overview of the instrument 7
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 controller ........................................................ 9
3.2.1 Operation ................................................................................ 9
3.3 Connecting MSB devices .................................................... 13
3.3.1 Connecting a dosing device ................................................... 14
3.3.2 Connecting a stirrer or titration stand .................................... 15
3.3.3 Connecting a Remote Box ..................................................... 16
3.4 Connecting USB devices ..................................................... 17
3.4.1 General ................................................................................. 17
3.4.2 Connecting a USB hub ........................................................... 18
3.4.3 Connecting a printer .............................................................. 18
3.4.4 Connecting a balance ............................................................ 19
3.4.5 Connecting a PC keyboard (only for operation with Touch
Control) ................................................................................. 20
3.4.6 Connecting a barcode reader ................................................. 21
3.5 Connecting the instrument to the power grid ................. 22
3.6 Titration vessel for coulometric KF titration .................... 23
3.6.1 Mounting the coulometer cell ................................................ 23
3.6.2 Coulometer cell – Standard setup .......................................... 24
3.6.3 Coulometer cell with addition and aspiration tube (utilization
with Ti Stand) ........................................................................ 29

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 851 Titrando
3.6.4 Coulometer cell with aspiration equipment (utilization with
Dosino) .................................................................................. 30
3.6.5 Coulometer cell with Karl Fischer oven ................................... 31
3.6.6 Coulometer cell with sample changer .................................... 31
3.7 Connecting sensors ............................................................ 32
3.7.1 Connecting a generator electrode .......................................... 32
3.7.2 Connecting an indicator electrode ......................................... 32
3.7.3 Connecting a temperature sensor .......................................... 33
4 Coulometric titration 35
4.1 Principle of coulometry according to Karl Fischer ........... 35
4.2 Working with water standards ......................................... 36
4.2.1 Certified water standards ....................................................... 36
4.2.2 Practical recommendations .................................................... 36
4.3 Sample addition .................................................................. 38
4.3.1 Size of the sample size ........................................................... 38
4.3.2 Working with liquid samples .................................................. 38
4.3.3 Working with solid samples ................................................... 39
4.4 Optimum working conditions ........................................... 40
4.4.1 General ................................................................................. 40
4.4.2 Drift ...................................................................................... 40
4.4.3 Reagent replacement ............................................................. 41
4.4.4 Indicator electrode ................................................................ 41
5 Operation and maintenance 42
5.1 General notes ...................................................................... 42
5.1.1 Care ...................................................................................... 42
5.1.2 Maintenance by Metrohm Service .......................................... 42
5.2 Generator electrode ........................................................... 43
5.2.1 Generator electrode without diaphragm ................................ 43
5.2.2 Generator electrode with diaphragm ..................................... 43
6 Troubleshooting 45
6.1 General ................................................................................ 45
6.2 Karl Fischer titration ........................................................... 45
6.2.1 ............................................................................................. 45
7 Appendix 47
7.1 Remote interface ................................................................ 47
7.1.1 Pin assignment of the remote interface .................................. 47
8 Technical specifications 51
8.1 Measuring interface ........................................................... 51
8.1.1 Generator electrode ............................................................... 51
8.1.2 Indicator electrode ................................................................ 51

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of contents
851 Titrando ￭￭￭￭￭￭￭￭ V
8.1.3 Temperature .......................................................................... 51
8.2 Power connection ............................................................... 52
8.3 Ambient temperature ......................................................... 52
8.4 Interfaces ............................................................................. 52
9 Accessories 53
Index 54

Table of figures ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
VI ￭￭￭￭￭￭￭￭ 851 Titrando
Table of figures
Figure 1 The Titrando system .......................................................................... 1
Figure 2 Front 851 Titrando ............................................................................ 7
Figure 3 Rear 851 Titrando ............................................................................. 8
Figure 4 Connecting the Touch Control ......................................................... 10
Figure 5 Connecting the computer ................................................................ 12
Figure 6 MSB connections ............................................................................ 13
Figure 7 Connecting a dosing device ............................................................. 15
Figure 8 Connecting an MSB stirrer ............................................................... 16
Figure 9 Connecting the rod stirrer to the titration stand ............................... 16
Figure 10 Connecting the Remote Box ............................................................ 17
Figure 11 Connecting a printer ....................................................................... 19
Figure 12 Mounting the coulometer cell ......................................................... 23
Figure 13 Filling the adsorber tube .................................................................. 24
Figure 14 Equipping the coulometer cell ......................................................... 25
Figure 15 Unscrewing the cover from the indicator electrode .......................... 27
Figure 16 Unscrewing the cover from the generator electrode ........................ 27
Figure 17 Screwing the electrode cable to the electrodes ................................ 28
Figure 18 Mounting the addition and aspiration tube ...................................... 29
Figure 19 Connecting a generator electrode ................................................... 32
Figure 20 Connecting an indicator electrode ................................................... 33
Figure 21 Connecting a temperature sensor .................................................... 33
Figure 22 Connectors of the Remote Box ........................................................ 47
Figure 23 Pin assignment of remote socket and remote plug ........................... 47

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
851 Titrando ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 The Titrando system
The Titrando is the heart of the modular Titrando system. Operation is car-
ried out either by a Touch Control with a touch-sensitive screen ("stand-
alone titrator") or by a computer with a corresponding software.
A Titrando system can contain numerous, various kinds of instruments.
The following figure provides an overview of the peripheral devices you
can connect to the 851 Titrando.
MSB
USB
Controller
Input 1 / 2
Sensors
PC keyboard
Barcode
reader
USB hub
USB/RS-232 Converter
Balance
Touch Control
USB Sample Processor
Robotic Titrosampler
Printer
Relay Box
Remote Box
Dosing Interface
Stirrer / Ti Stand Dosino Dosimat
On
Status
805
D
o
s
i
m
a
Me
t
r
o
h
On
Titrando
Computer
Figure 1 The Titrando system

1.2 Instrument description ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 851 Titrando
Up to three control instruments (Titrando, Dosing Interface, USB Sample
Processor, etc.) can be controlled via USB connection during operation
with the 900 Touch Control.
You can request information on special applications in the "Application
Bulletins" and "Application Notes", available free of charge via the
Metrohm representative responsible. Various monographs on the subjects
of titration techniques and electrodes are also available.
Updating the device software is described in the help of the correspond-
ing PC software.
1.2 Instrument description
The 851 Titrando has the following characteristics:
￭Operation
Operation is carried out by means of a touch-sensitive Touch Control or
with a high-performance PC software.
￭MSB connectors
Four MSB connectors (Metrohm Serial Bus) for connecting dosing devi-
ces (Dosimat with exchange unit or Dosino with dosing unit), stirrers,
titration stands and Remote Boxes.
￭USB connectors
Two USB connectors, through which devices such as printers, PC key-
boards, barcode readers or additional control devices (USB Sample Pro-
cessor, Titrando, Dosing Interface, etc.) can be connected.
￭Measuring interface
One measuring input each for:
– a generator electrode
– a temperature sensor (Pt1000 or NTC)
– a double Pt electrode
1.3 Titration modes – Measuring modes – Dosing com-
mands
The 851 Titrando supports the following titration modes, measuring
modes and dosing commands:
￭KFC
Coulometric water content determination according to Karl Fischer.
Measuring mode:
–Ipol (voltametric measurement with selectable polarization cur-
rent)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
851 Titrando ￭￭￭￭￭￭￭￭ 3
￭BRC
Coulometric bromine index determination. Determining the amount of
double bonds in e.g. mineral oils.
Measuring mode:
–Ipol (voltametric measurement with selectable polarization cur-
rent)
￭MEAS
The following measuring modes can be selected for measurements:
–T (temperature measurement)
￭Dosing commands
The following commands for dosing can be selected:
–PREP (rinsing the cylinder and tubings of an exchange unit or
dosing unit)
–EMPTY (emptying the cylinder and tubings of a dosing unit)
–ADD (dosing a specified volume)
–LQH (carrying out complex dosing tasks with a Dosino)
1.4 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.
1.4.1 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.

1.5 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 851 Titrando
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.
1.5 Safety instructions
1.5.1 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.
1.5.2 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 Introduction
851 Titrando ￭￭￭￭￭￭￭￭ 5
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.
1.5.3 Working with liquids
CAUTION
Periodically check all system connections for leaks. Observe the relevant
regulations in respect to working with flammable and/or toxic fluids
and their disposal.

1.5 Safety instructions ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 851 Titrando
1.5.4 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.
1.5.5 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 Overview of the instrument
851 Titrando ￭￭￭￭￭￭￭￭ 7
2 Overview of the instrument
1
On
Gen.
2
3
851 Titrando
Figure 2 Front 851 Titrando
1Bottle holder
With holding clamps, for two reagent bot-
tles.
2"On" LED
Lights up when the Titrando is ready for
operation.
3"Gen." LED
Lights up when the Titrando is ready for
operation and the generator electrode is
connected.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 851 Titrando
16
2
3
4
5
7
8
9
Figure 3 Rear 851 Titrando
1Type plate
Contains specifications concerning supply
voltage, instrument type and serial number.
2USB connector (USB 1 and USB 2)
USB ports (type A) for connecting printer,
keyboard, barcode reader, additional Titran-
dos, USB Sample Processor, etc.
3Connector (Controller)
For connecting a Touch Control or a PC with
installed PC software. Mini DIN, 9-pin.
4MSB connector (MSB 1 to MSB 4)
Metrohm Serial Bus. For connecting external
dosing devices, stirrers or Remote Boxes.
Mini DIN, 9-pin.
5Power socket 6Measuring interface 1 (Input 1)
7Electrode connector (Gen.)
For connecting a generator electrode.
8Temperature sensor connector (Temp.)
For connecting temperature sensors (Pt1000
or NTC). Two B sockets, 2 mm.
9Electrode connector (Ind.)
For connecting a double Pt electrode. Socket
F.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
851 Titrando ￭￭￭￭￭￭￭￭ 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 controller
3.2.1 Operation
Two different versions are available for operating the 851 Titrando:
￭A Touch Control with touch-sensitive screen. It forms a "stand-alone
instrument" together with the 851 Titrando.
￭A computer enables operation of the 851 Titrando with the help of a
PC software, e.g. tiamo.
CAUTION
Take care to ensure that the power cord is pulled out of the power
socket before either setting up or disconnecting connections between
the instruments.

3.2 Connecting a controller ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 851 Titrando
3.2.1.1 Connecting a Touch Control
NOTICE
The plug is protected against accidental disconnection of the cable by
means of a pull-out protection feature. If you wish to pull out the plug,
you first need to pull back the outer plug sleeve marked with arrows.
Connect the Touch Control as follows:
1￭Insert the plug of the Touch Control connection cable into the
Controller socket.
Figure 4 Connecting the Touch Control
2￭Connect the MSB devices (see chapter 3.3, page 13).
￭Connect the USB devices (see chapter 3.4, page 17).
3￭Connect the Titrando to the power grid.
4￭Switch on the Touch Control.
The Touch Control power supply is supplied through the Titrando.
Automatic system tests are performed on both instruments at the
time of activation. The On LED on the front of the Titrando lights up
when the system test has been completed and the instrument is
ready for operation.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
851 Titrando ￭￭￭￭￭￭￭￭ 11
CAUTION
The Touch Control must be shut down properly by deactivation with the
power switch on the rear of the instrument before the power supply is
interrupted. If this is not done, then there is a danger of data loss.
Because of the fact that the power supply for the Touch Control is pro-
vided through the Titrando, you must never disconnect the Titrando
from the power grid (e.g. by deactivating with a connector strip) before
you have deactivated the Touch Control.
If you would prefer not to position the Touch Control directly next to the
Titrando, then you can lengthen the connection with the 6.2151.010
cable. The maximum connection length permitted is 5 m.
3.2.1.2 Connecting a computer
The 851 Titrando requires a USB connection to a computer in order to be
able to be controlled by a computer software. Using a 6.2151.000 con-
troller cable, the instrument can be connected directly, either to a USB
socket on a computer, to a connected USB hub or to a different Metrohm
control instrument.
You need administrator rights for the installation of driver software and
control software on your computer.
Cable connection and driver installation
A driver installation is required in order to ensure that the 851 Titrando is
recognized by the computer software. To accomplish this, you must com-
ply with the procedures specified. The following steps are necessary:
1Installing the software
￭Insert the computer software installation CD and carry out the
installation program directions.
￭Exit the program if you have started it after the installation.
2Establishing the cable connections
￭Connect the instrument to the power supply if you have not
already done this.
The "On" LED on the 851 Titrando is not yet illuminated!
￭Connect the instrument to a USB connector (type A) of your com-
puter (see manual of your computer). The 6.2151.000 cable is
used for this purpose.

3.2 Connecting a controller ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 851 Titrando
6.2151.000
Figure 5 Connecting the computer
The instrument is recognized. Depending on the version of the Win-
dows operating system used, the driver installation proceeds differ-
ently afterwards. Either the necessary driver software is installed
automatically or an installation wizard is started.
3Follow the instructions of the installation wizard.
The "On" LED on the 851 Titrando lights up when the driver installa-
tion has been completed and the instrument is ready for operation.
If problems should occur during installation, contact your company's IT
support team.
NOTICE
The plug on the instrument end of the 6.2151.000 controller cable is
protected against accidental disconnection by means of a pull-out pro-
tection feature. If you wish to pull out the plug, you first need to pull
back the outer plug sleeve marked with arrows.
Registering and configuring the instrument in the computer
software
The instrument must be registered in the configuration of your computer
software. Once that has been done, you can then configure it according
to your requirements. Proceed as follows: