Metrohm 917 Coulometer User manual

917 Coulometer
Manual – Short Instructions
8.917.8002EN / 2019-11-20

Metrohm AG
CH-9100 Herisau
Switzerland
Phone [phone]
Fax [phone]
[email protected]
www.metrohm.com
917 Coulometer
Manual – Short Instructions
8.917.8002EN / 2019-11-20

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
917 Coulometer ￭￭￭￭￭￭￭￭ III
Table of contents
1 About these short instructions 1
2 Introduction 2
2.1 Instrument description ......................................................... 2
2.1.1 Titration and measuring modes ................................................ 2
2.1.2 Connectors .............................................................................. 3
2.1.3 Intended use ........................................................................... 3
2.2 About the documentation ................................................... 3
2.2.1 Symbols and conventions ........................................................ 4
3 Safety instructions 5
3.1 General notes on safety ....................................................... 5
3.2 Electrical safety ..................................................................... 5
3.3 Tubing and capillary connections ........................................ 6
3.4 Flammable solvents and chemicals ..................................... 6
3.5 Recycling and disposal ......................................................... 7
4 Overview of the instrument 8
4.1 Front of the instrument ........................................................ 8
4.2 Rear of the instrument ......................................................... 9
5 Installation 10
5.1 Setting up the instrument .................................................. 10
5.1.1 Packaging .............................................................................. 10
5.1.2 Checks .................................................................................. 10
5.1.3 Location ................................................................................ 10
5.2 Setting up the titration cell for coulometry ..................... 11
5.2.1 Inserting the titration cell ....................................................... 11
5.2.2 Preparing the titration cell ...................................................... 11
5.2.3 Mounting the addition and aspiration tube ............................ 15
5.3 Connecting the coulometer to the power supply ............ 16
5.4 Connecting sensors ............................................................ 17
5.4.1 Connecting generator electrodes ........................................... 17
5.4.2 Connecting indicator electrodes ............................................. 19
5.4.3 Connecting a temperature sensor .......................................... 21
5.5 Connecting MSB devices .................................................... 22
5.5.1 Connecting a dosing device ................................................... 23
5.5.2 Connecting an additional stirrer or titration stand .................. 24
5.5.3 Connecting a Remote Box ..................................................... 24

Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 917 Coulometer
5.6 Connecting USB devices ..................................................... 25
5.6.1 General ................................................................................. 25
5.6.2 Connecting a USB hub ........................................................... 25
5.6.3 Connecting a printer .............................................................. 25
5.6.4 Connecting a balance ............................................................ 26
5.6.5 Connecting a PC keyboard ..................................................... 27
5.6.6 Connecting a barcode reader ................................................. 27
5.7 Connecting the Coulometer to a network ....................... 28
6 Operation 29
6.1 Switching the instrument on and off ................................ 29
6.2 Fundamentals of operation ............................................... 31
6.2.1 Touch-sensitive screen ........................................................... 31
6.2.2 Display elements and controls ................................................ 32
6.2.3 Status display ......................................................................... 33
6.2.4 Entering text and numbers ..................................................... 34
7 Maintenance 36
Index 37

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
917 Coulometer ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front ................................................................................................. 8
Figure 2 Rear .................................................................................................. 9
Figure 3 Inserting the titration cell ................................................................. 11
Figure 4 Filling the adsorber tube .................................................................. 12
Figure 5 Equipping the titration cell ............................................................... 13
Figure 6 Mounting the addition and aspiration tube ...................................... 15
Figure 7 Connecting the power supply unit ................................................... 16
Figure 8 Unscrewing the protective cap from the generator electrode ........... 18
Figure 9 Screwing the electrode cable to the generator electrode ................. 18
Figure 10 Connecting a generator electrode ................................................... 19
Figure 11 Unscrewing the protective cap from the indicator electrode ............ 19
Figure 12 Screwing the electrode cable to the indicator electrode ................... 20
Figure 13 Connecting an indicator electrode ................................................... 20
Figure 14 MSB connections ............................................................................ 22
Figure 15 MSB connector ............................................................................... 23

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 About these short instructions
917 Coulometer ￭￭￭￭￭￭￭￭ 1
1 About these short instructions
This short instruction manual contains important information concerning
the 917 Coulometer. In addition to an introduction, safety instructions
and an overview of the instrument, you will also find information about
the installation of the coulometer.
Additional information concerning the instrument can be found at
http://products.metrohm.com.

2.1 Instrument description ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 917 Coulometer
2 Introduction
2.1 Instrument description
The 917 Coulometer is a compact titration system for coulometric Karl
Fischer titration. This titrator combines in a single device the touch-sensi-
tive color monitor for convenient and efficient operation, the magnetic
stirrer and the membrane pump for adding and aspirating solvents. The
upper side of the housing offers space for the titration cell. Thanks to its
compact construction, you can use the 917 Coulometer in a small space
as a stand-alone titrator.
You manage reagents, sensors, methods, etc. conveniently in the internal
memory of the coulometer. You can also save your files externally through
the USB connector, e.g. on a USB flash drive. On this storage medium you
can not only store your methods and determinations, but also create a
backup together with all of the data and settings of your system.
The integrated Ethernet connector is available to you should you wish to
connect your 917 Coulometer to a network. The network connection
offers you the following advantages:
￭Saving data to a PC within the network
￭Printing reports on a network printer
￭Sending displayed messages as e-mails
2.1.1 Titration and measuring modes
The 917 Coulometer supports the following titration and measuring
modes.
￭KFC
Coulometric water content determination according to Karl Fischer
with voltametric measurement.
￭BRC
Coulometric bromine index determination. Determining the amount of
double bonds in e.g. mineral oils.
￭MEAS
Measuring modes:
–Ipol (voltametric measurement with selectable polarization cur-
rent)
–Upol (amperometric measurement with selectable polarization
voltage)
–T (temperature measurement)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Introduction
917 Coulometer ￭￭￭￭￭￭￭￭ 3
2.1.2 Connectors
The 917 Coulometer is equipped with the following connectors:
￭Power connection
For connecting to the power grid using the power supply unit provi-
ded.
￭Two MSB connectors (Metrohm Serial Bus)
For connecting dosing devices, one additional stirrer or a Remote Box.
￭USB connector
For connecting peripheral devices (printer, PC keyboard, etc.), a USB
flash drive or a USB hub.
￭Sensor connectors
One connector each for:
– Generator electrode
– Indicator electrode
– Temperature sensors (Pt1000 or NTC)
￭Ethernet connector
For connecting the Coulometer to a network.
￭Two connection nipples
For connecting tubing for replacing reagent using the built-in pump.
2.1.3 Intended use
The 917 Coulometer is designed for usage as a titrator in analytical labora-
tories. Its main application field is coulometric Karl Fischer titration.
This instrument is suitable for processing chemicals and flammable sam-
ples. Therefore, the use of the instrument requires the user to have basic
knowledge and experience in handling toxic and caustic substances.
Knowledge regarding the application of fire prevention measures prescri-
bed for laboratories is also mandatory.
2.2 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.

2.2 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
4￭￭￭￭￭￭￭￭ 917 Coulometer
2.2.1 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.
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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Safety instructions
917 Coulometer ￭￭￭￭￭￭￭￭ 5
3 Safety instructions
3.1 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.
3.2 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.
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).

3.3 Tubing and capillary connections ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6￭￭￭￭￭￭￭￭ 917 Coulometer
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.
3.3 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.
3.4 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Safety instructions
917 Coulometer ￭￭￭￭￭￭￭￭ 7
3.5 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.

4.1 Front of the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
8￭￭￭￭￭￭￭￭ 917 Coulometer
4 Overview of the instrument
4.1 Front of the instrument
Figure 1 Front
1Display
Touch screen.
2Fixed key [Home]
Opens the main dialog.
3Fixed key [Back]
Saves the entry and opens the next-higher
dialog page.
4Fixed key [Help]
Opens the online help for the dialog dis-
played.
5Fixed key [Print]
Opens the print dialog.
6Key
Pressing the key pumps air into the solvent
bottle. The overpressure in the solvent bottle
pushes solvent into the titration cell.
7Key
Pressing the key aspirates air out of the aspi-
ration bottle. The vacuum in the aspiration
bottle aspirates the liquid out of the titration
cell and into the aspiration bottle.
8Fixed key [Manual]
Opens the manual control.
9Fixed key [STOP]
Cancels the running determination.
10 Fixed key [START]
Starts a determination.
11 Magnetic stirrer
For placing the titration vessel holder.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 4 Overview of the instrument
917 Coulometer ￭￭￭￭￭￭￭￭ 9
4.2 Rear of the instrument
Figure 2 Rear
1USB connector (type A)
For connecting printers, USB flash drives,
USB hubs, etc.
2Ethernet connector (RJ-45)
For connecting to a network.
3Indicator electrode connector (Ind.)
For connecting the indicator electrode.
4Temperature sensor connector (Temp.)
For connecting temperature sensors (Pt1000
or NTC). Two B sockets, 2 mm.
5MSB connector (MSB 1 and MSB 2)
Metrohm Serial Bus. For connecting external
dosing devices, stirrers or a Remote Box.
Mini DIN, 8-pin.
6Generator electrode connector (Gen.)
For connecting the generator electrode.
7Power socket (Power)
For connecting the external power supply
unit.
8Power switch
Switches the instrument on/off.
9Connection nipple for PVC tubing
For aspirating the contents of the titration
cell.
10 Connection nipple for PVC tubing
For aspirating solvent.
11 Type plate
Contains the serial number.

5.1 Setting up the instrument ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
10 ￭￭￭￭￭￭￭￭ 917 Coulometer
5 Installation
5.1 Setting up the instrument
5.1.1 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.
5.1.2 Checks
Immediately after receipt, check whether the shipment has arrived com-
plete and without damage by comparing it with the delivery note.
5.1.3 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.

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Installation
917 Coulometer ￭￭￭￭￭￭￭￭ 11
5.2 Setting up the titration cell for coulometry
5.2.1 Inserting the titration cell
Figure 3 Inserting the titration cell
Set up the titration cell on the magnetic stirrer as follows:
1Attach the 6.2047.040 titration vessel holder to the magnetic stirrer.
2Insert the 6.1464.320 titration cell into the titration vessel holder.
5.2.2 Preparing the titration cell
Filling the adsorber tube
Before setting up the titration cell, the 6.1403.030 adsorber tube has to
be filled with 6.2811.000 molecular sieve. Proceed as follows:

5.2 Setting up the titration cell for coulometry ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
12 ￭￭￭￭￭￭￭￭ 917 Coulometer
6.1403.030
6.2811.000
1
2
3
4
Figure 4 Filling the adsorber tube
1Insert a small cotton plug into the bottom of the adsorber tube. Do
not pack the cotton too tightly.
2Fill the molecular sieve up to ¾ of the height.
3Place a small cotton plug on the molecular sieve. Do not pack the
cotton too tightly.
4Seal the adsorber tube with the appropriate cover.
NOTICE
Note that the molecular sieve must be replaced at regular intervals.
Each time you refill the adsorber tube with molecular sieve, you can, for
example, write the date directly on the adsorber tube.