Metrohm 873 User Manual
873 Biodiesel Rancimat
Manual
8.873.8003EN
Metrohm AG
CH-9101 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
873 Biodiesel Rancimat
Manual
8.873.8003EN 03.2009 jb/ars
Teachware
Metrohm AG
CH-9101 Herisau
teachware@metrohm.com
This documentation is protected by copyright. All rights reserved.
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.
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Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Rancimat method ................................................................. 2
1.3 About the documentation ................................................... 3
1.3.1 Symbols and conventions ........................................................ 3
1.4 Safety instructions ................................................................ 4
1.4.1 General notes on safety ........................................................... 4
1.4.2 Electrical safety ........................................................................ 5
1.4.3 Flammable solvents and chemicals ........................................... 6
1.4.4 Recycling and disposal ............................................................. 6
2 Overview of the instrument 7
3 Installation 10
Table of contents
3.1 Setting up the instrument .................................................. 10
3.1.1 Packaging .............................................................................. 10
3.1.2 Checks .................................................................................. 10
3.1.3 Location ................................................................................ 10
3.2 Mounting accessories ......................................................... 10
3.2.1 Mounting accessories for the internal air supply ..................... 10
3.2.2 Mounting accessories for the external air supply .................... 13
3.2.3 Equipping the reaction and measuring vessels ........................ 13
3.2.4 Inserting vessels / Establishing tubing connections ................. 16
3.2.5 Mounting the exhaust collection tube (optional accesso-
ries) ....................................................................................... 16
3.3 Mains connection ............................................................... 17
3.3.1 Checking the mains voltage ................................................... 17
3.3.2 Replacing fuses ...................................................................... 18
3.3.3 Mains cable and mains connection ........................................ 18
3.3.4 Switching the instrument on/off ............................................ 19
3.4 Connecting a PC ................................................................. 19
3.4.1 Connecting the 873 Biodiesel Rancimat and the PC ............... 19
3.4.2 Installing the software ........................................................... 19
3.4.3 Carrying out basic settings ..................................................... 21
4 Operation 24
873 Biodiesel Rancimat
4.1 Fundamentals of operation ............................................... 24
4.1.1 Starting and exiting the program ........................................... 24
4.1.2 Terms .................................................................................... 25
4.1.3 Control window .................................................................... 25
4.1.4 Results window ..................................................................... 27
4.1.5 File types ............................................................................... 30
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III
Table of contents
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4.1.6 Context-sensitive menus ........................................................ 31
4.1.7 Mouse functions .................................................................... 31
4.1.8 Help ...................................................................................... 32
4.2 Instrument and Program Settings ..................................... 33
4.2.1 Establishing the instrument communication ........................... 33
4.2.2 Managing access rights ......................................................... 34
4.2.3 Timer ..................................................................................... 37
4.2.4 Gas flow control .................................................................... 39
4.2.5 Recording the temperature .................................................... 40
4.2.6 Optimizing program and database ......................................... 41
4.3 Program information ......................................................... 42
4.3.1 Instrument information .......................................................... 42
4.3.2 Status overview ..................................................................... 44
4.3.3 Displaying, filtering and deleting event overview .................... 45
4.4 Calibration functions .......................................................... 48
4.4.1 Determining cell constants ..................................................... 48
4.4.2 Determining Delta T .............................................................. 50
4.5 Methods .............................................................................. 55
4.5.1 Managing methods ............................................................... 55
4.5.2 Parameter description ............................................................ 60
4.6 Determinations ................................................................... 75
4.6.1 Preparing the instrument and the accessories ......................... 76
4.6.2 Preparing the determination .................................................. 77
4.6.3 Starting the determination ..................................................... 79
4.6.4 Cleaning the instrument and accessories ................................ 80
4.6.5 Adjusting the method parameters during the determina-
tion ....................................................................................... 81
4.6.6 Stopping the determination manually .................................... 81
4.6.7 Status of the live curve ........................................................... 82
4.7 Results ................................................................................. 83
4.7.1 Determination overview ......................................................... 83
4.7.2 Determination and method data ............................................ 99
4.7.3 Graph and reevaluation ....................................................... 108
4.7.4 Extrapolation ....................................................................... 113
4.7.5 Recalculating a determination .............................................. 117
4.7.6 Printing and exporting data ................................................. 124
4.7.7 Program settings ................................................................. 131
4.7.8 Arranging windows ............................................................. 137
4.8 GLP functions .................................................................... 138
4.8.1 General information on GLP and validation .......................... 138
4.8.2 GLP monitoring ................................................................... 138
4.8.3 GLP status ........................................................................... 140
4.8.4 Carrying out GLP tests ......................................................... 141
4.8.5 GLP results .......................................................................... 151
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IV
873 Biodiesel Rancimat
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5 Handling and maintenance 155
6 Troubleshooting 159
7 Technical specifications 165
Table of contents
5.1 General information ......................................................... 155
5.1.1 Care .................................................................................... 155
5.1.2 Maintenance by Metrohm Service ........................................ 155
5.2 Replacing the dust filter .................................................. 155
5.3 Regenerating or replacing the molecular sieve ............. 156
5.4 Self test when switching on ............................................ 156
5.5 Quality Management and validation with Metrohm .... 157
6.1 Problems ........................................................................... 159
7.1 General data ..................................................................... 165
7.2 Temperature regulation and measurement ................... 165
7.3 Conductivity measurement .............................................. 166
7.4 Gas flow regulation .......................................................... 166
7.5 GLP test set ....................................................................... 167
7.6 RS-232 interface ............................................................... 167
7.7 Mains connection ............................................................. 167
7.8 Safety specification .......................................................... 168
7.9 Electromagnetic compatibility (EMC) ............................. 168
7.10 Ambient temperature ...................................................... 168
7.11 Housing ............................................................................. 169
8 Conformity and warranty 170
8.1 Declaration of Conformity ............................................... 170
8.2 Quality Management Principles ...................................... 171
8.3 Warranty (guarantee) ....................................................... 172
9 Accessories 173
9.1 Scope of delivery .............................................................. 173
9.2 Optional accessories ........................................................ 180
873 Biodiesel Rancimat
Index 183
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V
Table of figures
Table of figures
Figure 1 Measuring arrangement (schematic representation) ........................... 3
Figure 2 Front 873 Biodiesel Rancimat ............................................................ 7
Figure 3 Rear 873 Biodiesel Rancimat .............................................................. 8
Figure 4 Mounting accessories for the air supply (rear of the instrument) ...... 11
Figure 5 Equipping the reaction and measuring vessels ................................. 14
Figure 6 Equipping the reaction vessel for determining Delta T ...................... 51
Figure 7 Accessories for GLP test Temperature ............................................ 141
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VI
873 Biodiesel Rancimat
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1 Introduction
1.1 Instrument description
The 873 Biodiesel Rancimat is a PC-controlled measuring device for determining the oxidation stability of biodiesel and biodiesel blends (mixture of
biodiesel and conventional diesel fuel) according to the standard
EN 14112.
It is equipped with two heating blocks each with 4 measuring positions
(channels). Every block can be heated individually, i.e. 4 samples can each
be measured at 2 different temperatures or 8 samples at the same temperature. The measurements at the individual measuring positions can be
started individually for this.
Operation of the 873 Biodiesel Rancimat is realized completely via a PC
connected to the RS-232 interface using the control and evaluation program
873 Biodiesel Rancimat. Up to 4 instruments can be connected to each
PC, hence allowing a maximum of 32 samples to be analyzed. The evaluation
algorithm of the PC program determines the break point of the Rancimat
curve fully automatically and hence the induction time. Besides the induc-
tion time, the so-called stability time, i.e. the time duration until attaining
a defined conductivity change, can also be determined. In the case of conductivity changes (stages) which do not have anything to do with the
autoxidation, the evaluation can be interrupted for definite time intervals.
The results determined can be processed further by computer.
1 Introduction
Each Rancimat curve can also be evaluated manually. A PC-supported tangential method is available for this, in which you can position the tangents
anywhere on your curves. This makes evaluations possible in extreme cases
as well.
The results of the determinations are saved in a database together with all
methods and determination data. Determinations can be searched for, sorted, filtered, exported and printed in the program part for the results display.
Besides the graphic display of single and multiple curves, recalculation with
altered parameters and extrapolation of the results to a definite temperature
is also possible.
GLP (Good Laboratory Practice) and instrument validation are becoming
increasingly important. The 873 Biodiesel Rancimat enables GLP tests for
temperature, conductivity and gas flow measurement. You determine
whether and which tests have to be carried out. You can also specify the
time interval between the tests as well as the requirements regarding accuracy. If the GLP function has been selected, each result report will receive a
comment stating whether the GLP tests have been fulfilled. Metrohm offers
873 Biodiesel Rancimat
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1
1.2 Rancimat method
a GLP test set to carry out these tests (see Optional accessories, page
180).
1.2 Rancimat method
Biodiesel, also referred to as RME (rape seed methyl ester) or FAME (fatty
acid methyl esters), is usually obtained from oil seeds and used in the motor
vehicle area either in pure form or as a mixture with conventional diesel fuel.
As is the case with the natural oils, the fatty acid methyl esters obtained from
them also exhibit a relatively low level of storage stability, as they are oxidized
by atmospheric oxygen. These oxidation processes progressing slowly at
ambient temperatures are referred to as autoxidation. They start with radical reactions on unsaturated fatty acids and undergo a process involving
multiple stages resulting in diverse decomposition products, in particular
peroxides as primary oxidation products and alcohols, aldehydes and carboxylic acids as secondary oxidation products.
With the Rancimat method, the sample is exposed to an air flow at a
constant temperature between 50…220 °C (see Figure 1, page 3). Highly
volatile, secondary oxidation products (for the most part formic acid) are
transferred into the measuring vessel with the air flow, where they are
absorbed in the measuring solution (distilled water). Here the conductivity
is continuously registered. The organic acids can thus be detected by increasing the conductivity. The time until occurrence of these secondary reaction
products is referred to as the induction time or induction period, which is a
good indicator for the oxidation stability.
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The Rancimat method has been developed as an automated variant to the
extremely complex AOM (active oxygen method) for determining the induc-
tion time of fats and oils. This method has become established over the
course of time, also being used for derivatives of oils and fats. It has meanwhile become an integral element of various national and international
standards for biodiesel and biodiesel mixtures, e.g. EN 14112 and
ASTM 6751.
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2
873 Biodiesel Rancimat
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Measuring
vessel
Conductivity
measuring cell
Measuring
solution
Reaction vessel
Sample
Heating block
1 Introduction
Figure 1 Measuring arrangement (schematic representation)
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:
Cross-reference to figure legend
The first number refers to the figure number, the second to the instrument part in the figure.
Method Dialog text, parameter in the software
Instruction step
Carry out these steps in the sequence shown.
873 Biodiesel Rancimat
File ▶ New
Menu or menu item
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3
1.4 Safety instructions
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[Next] Button or key
Warning
This symbol draws attention to a possible life 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
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.
Hot reaction vessels
This symbol draws attention to a possible damage of
instruments or instrument parts.
Note
This symbol marks additional information and tips.
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4
Warning
The reaction vessels can become very hot.
Avoid any contact with the hot reaction vessels. Place these in the vessel
holders provided for cooling down.
873 Biodiesel Rancimat
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1 Introduction
Flammable substances
Warning
The oven of the 873 Biodiesel Rancimat can be heated to 220 °C.
Flammable substances may ignite at these temperatures.
Adjust the maximum heating temperature of the oven to the sample being
examined.
Defective glass vessels
Warning
Caution with defective glass vessels.
An overflow of flammable samples into the heating block can be dangerous.
Check the glass vessels before each use.
1.4.2 Electrical safety
The electrical safety when working with the instrument is ensured as part of
the international standard IEC 61010.
Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
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.
Warning
Warning
873 Biodiesel Rancimat
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5
1.4 Safety instructions
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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
Warning
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 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. laboratory
flue).
￭ Keep all sources of flame far from the workplace.
￭ Clean up spilled fluids and solids immediately.
￭ Follow the safety instructions of the chemical manufacturer.
1.4.4 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.
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.
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6
873 Biodiesel Rancimat
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873
Biodiesel Rancimat
11
10
9
8
7
6
5
4
3
2
1
2 Overview of the instrument
2 Overview of the instrument
Figure 2 Front 873 Biodiesel Rancimat
Pilot lamp
1
Lights up when the instrument is switched on.
Temperature display
3
Flashes when the heating is switched on.
Lights up when the temperature has been
reached.
Instrument number display
5
Indicates the number of the instrument.
Lights up if the instrument is registered.
Flashes (all LEDs) if the connection to the PC
is interrupted.
Measuring vessel cover (6.0913.130)
7
Contains an integrated conductivity measuring cell.
9
Iso-Versinic® tubing (6.1839.000)
For connecting the reaction vessel to the
measuring vessel. A fluoroelastomer.
Gas flow display
2
Flashes when the gas flow is switched on.
Lights up when the gas flow has been
reached.
Error display (red)
4
Lights up or flashes when a fault has occurred
in the instrument (see Troubleshooting Chap-
ter).
FEP tubing 250 mm (6.1805.080)
6
For supplying air into the reaction vessel.
Glass measuring vessel (6.1428.030)
8
Reaction vessel cover (6.2753.107)
10
873 Biodiesel Rancimat
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7
Reaction vessel (6.1429.040)
Molecular sieve flask
Filter
Air out
2
Air/N in
Pt 100
RS 232
WARNING - Fire Hazard -
with the same type and rating of fuse
For continued protection replace only
100-115V: 4A(TH)
Fuse
Made by Metrohm Herisau Switzerland
From
flask
To
flask
220-240V: 2A(TH)
Type:
Nr.:
U:
f:
S:
14
3
4
5
6
8 9 10
13 15
16
18 19 20
1
2
11
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Figure 3 Rear 873 Biodiesel Rancimat
Collection tube holder
1
For fastening the optional exhaust collection
tube (6.2757.000).
Air supply connection
3
For connecting the FEP tubing 250 mm
6
).
(2-
Mains connection socket
5
For important information on the mains connection, see Chapter 3.3.
Type plate
7
Contains specifications concerning mains
voltage and serial number.
Pt100 connector
9
For connecting an external temperature sen-
8
sor.
Drying flask (6.1608.050)
11
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Electrode connector
2
For connecting the conductivity measuring
cell integrated in the measuring vessel cover
7
).
(2-
Mains switch
4
For turning the instrument on and off.
I = ON / 0 = OFF.
Fuse holder
6
Replacing fuses, see Chapter 3.3.2.
RS-232 connector
8
For connecting the PC.
Drying flask cover (6.1602.145)
10
Cover for the drying flask.
Flask holder
12
For fastening the drying flask.
873 Biodiesel Rancimat
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2 Overview of the instrument
FEP tubing 250 mm (6.1805.080)
13
For supplying the air from the internal pump
to the drying flask.
"From Flask" connection
15
FEP tubing 130 mm (6.1805.010)
17
For connecting the Air out connection to the
Air/N2 in connection during normal opera-
tion with the internal air pump.
"To Flask" connection
19
FEP tubing 250 mm (6.1805.080)
14
For supplying the air from the drying flask to
11
the reaction vessel (2-
"Air/N2 in" connection
16
"Air out" connection
18
Dust filter (6.2724.010)
20
).
873 Biodiesel Rancimat
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9
3.1 Setting up the instrument
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.
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Place the instrument in a location of the laboratory suitable for operation
and free of vibrations, if possible protected from corrosive atmospheres and
contamination by chemicals.
The instrument should be protected against excessive temperature fluctuations and direct sunlight.
Note
In order to improve accessibility for the measuring positions, the instrument can be placed on the optionally available 6.2059.000 turning ring.
3.2 Mounting accessories
3.2.1 Mounting accessories for the internal air supply
The gas in the Biodiesel Rancimat is normally supplied using the internal
air pump, which sucks in laboratory air. For air supply and air purifica-
tion, the following accessories must be mounted on the rear of the Biodiesel
Rancimat:
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10
873 Biodiesel Rancimat
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Molecular sieve flask
Filter
Air out
2
Air/N in
From
flask
To
flask
8
9
10
12
11
1
2
3
654 7
3 Installation
Figure 4 Mounting accessories for the air supply (rear of the instrument)
Drying flask cover (6.1602.145)
1
Cover for the drying flask.
Flask holder
3
For fastening the drying flask.
FEP tubing 250 mm (6.1805.080)
5
For supplying the air from the internal pump
to the drying flask.
"From Flask" connection
7
"To Flask" connection
9
FEP tubing 130 mm (6.1805.010)
11
Mount the accessories for the air supply as follows:
1
Mount dust filter
￭ Insert the dust filter (4-
￭ If the laboratory air is heavily contaminated, a tubing for supplying
Drying flask (6.1608.050)
2
Filter tube (6.1821.040)
4
FEP tubing 250 mm (6.1805.080)
6
For supplying the air from the drying flask to
the reaction vessel (2-
Dust filter (6.2724.010)
8
"Air out" connection
10
"Air/N2 in" connection
12
8
) on the connection marked with Filter on
the rear of the Biodiesel Rancimat.
fresh air can be connected to the dust filter.
11
).
Note
The dust filter serves for filtering the air sucked through the air pump
and must be replaced at periodic intervals (see Chapter 5.2, page
155).
873 Biodiesel Rancimat
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11
3.2 Mounting accessories
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2
Mount drying flask
Caution
Do not fill the hot molecular sieve directly into the drying flask after
regeneration, as otherwise the plastic filter on the filter tube will
melt.
Wait until the molecular sieve has cooled down before filling.
2
￭ Fill the molecular sieve into the drying flask (4-
￭ Screw the filter tube (4-
4
) on the lower side of the drying flask cover
).
(4-1) into the opening marked (above) with a dot.
￭ Screw the drying flask cover with mounted filter tube onto the dry-
ing flask and insert in the flask holder (4-
3
) on the rear of the
Biodiesel Rancimat.
￭ Screw the one end of the FEP tubing 250 mm (4-
6
) onto that opening on the drying flask cover at the bottom of which the filter tube
is located.
￭ Screw the other end of the FEP tubing onto the From flask con-
nection (4-
￭ Screw the one end of the second FEP tubing 250 mm (4-
7
) on the rear of the Biodiesel Rancimat.
5
the second opening on the drying flask cover.
￭ Screw the other end of the second FEP tubing onto the To flask
connection (4-
9
).
) onto
Note
The molecular sieve serves for adsorbing interfering oxidizing gases
as well as water from the sucked in air. You can regenerate it in the
drying oven at +140…+180 °C for 24 to 48 h (see Chapter 5.3, page
156).
3
Mount the FEP tubing for the supply air
￭ Screw the one end of the FEP tubing 130 mm (4-
out connection (4-
￭ Screw the other end of the FEP tubing onto the Air/N
12
tion (4-
).
10
).
11
) onto the Air
in connec-
2
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12
873 Biodiesel Rancimat
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
3.2.2 Mounting accessories for the external air supply
If the laboratory air is heavily contaminated, an external gas supply with
synthetic air can be provided. For this, the corresponding accessories must
be mounted on the rear of the Biodiesel Rancimat.
Mount the accessories for the external air supply as follows:
1
Mount the FEP tubing
3 Installation
￭ Screw the one end of the FEP tubing 130 mm (4-
N2 in connection (4-
￭ Screw the tubing adapter M6 / olive (6.1808.020) onto the other
12
) on the rear of the Biodiesel Rancimat.
end of the FEP tubing.
2
Connect the gas supply
￭ Mount the gas supply from the bomb with synthetic air onto the
tubing adapter M6 / olive (6.1808.020).
Note
With an external gas supply, the gas flow cannot be regulated in the PC
program. The gas flow must be set manually using the reducing valve and
the gas flow display (see Chapter 4.2.4, page 39).
3.2.3 Equipping the reaction and measuring vessels
The following figure shows in detail, how the accessories parts for measuring
the oxidation stability have to be mounted and connected to one another.
11
) onto the Air/
873 Biodiesel Rancimat
￭￭￭￭￭￭￭￭
13
3.2 Mounting accessories
2
1
3
4
5
6
7
8
9
10
20
16
12
11
13
14
15
17
18
19
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Figure 5 Equipping the reaction and measuring vessels
FEP tubing 250 mm (6.1805.080)
1
For supplying air into the reaction vessel.
Thread adapter M8 / M6 (6.1808.090)
3
Air tube (6.2418.130)
5
Connection
7
For connecting the thread adapter M8 / M6.
Foam barrier (6.1451.010)
9
Tubing adapter M8 / olive (6.1808.050)
11
For connecting the Iso-Versinic® tubing to the
opening In (5-13).
Opening "In"
13
For supplying the air to the measuring vessel.
2
Iso-Versinic® tubing (6.1839.000)
For connecting the reaction vessel to the
measuring vessel. A fluoroelastomer.
Tubing connector
4
For connecting the Iso-Versinic® tubing.
O-ring (6.1454.040)
6
Reaction vessel cover (6.2753.107)
8
Reaction vessel (6.1429.040)
10
Opening "Out"
12
For removing the air from the measuring vessel.
Labeling field
14
For entering the cell constant.
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14
873 Biodiesel Rancimat
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3 Installation
Connector plug
15
PTFE tube (6.1819.080)
17
For supplying the air to the measuring solution.
Protection ring
19
Proceed as follows to mount the measuring and reaction vessel:
1
Mount the measuring vessel cover
￭ Insert the PTFE tube (5-
￭ Screw the tubing adapter M8 / olive (5-
￭ Place the measuring vessel cover (5-
2
Mount the reaction vessel cover
￭ Insert the air tube (5-
￭ Place the O-ring (5-
￭ Screw the thread adapter M8 / M6 (5-
￭ Now fix the air tube onto the reaction vessel cover by firmly pulling
￭ If determinations are carried out with highly foaming samples,
￭ Place the reaction vessel cover on the reaction vessel.
Measuring vessel cover (6.0913.130)
16
Contains integrated conductivity measuring
cell.
Electrode
18
Glass measuring vessel (6.1428.030)
20
17
) from above into the opening In (5-13)
of the measuring vessel cover.
11
) into the opening In of
the measuring vessel cover.
16
) on the measuring vessel
(5-20).
5
) from below into the connection (5-7) of the
reaction vessel cover.
6
) over the upper end of the air tube.
3
) gently into the connection
(5-7) and, at the same time, press the air tube against the
thread adapter M8 / M6.
the thread adapter M8 / M6.
clamp the foam barrier (5-
9
) onto the air tube.
873 Biodiesel Rancimat
Warning
The foam barrier can melt if it projects too deeply into the heating block.
Ensure that the foam barrier (5-9) is at least 7 cm above the base of the
reaction vessel (5-10).
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15
3.2 Mounting accessories
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
3.2.4 Inserting vessels / Establishing tubing connections
After you have assembled the reaction and measuring vessels, insert them
in the Rancimat and establish the tubing connections as follows:
1
Insert the measuring vessel
￭ Fill the measuring vessel (5-
￭ Place the measuring vessel cover on the measuring vessel.
￭ Insert the measuring vessel into the openings provided on the Bio-
20
) with distilled water.
diesel Rancimat. At the same time, carefully insert the connector
plugs (5-
￭ Connect the black Iso-Versinic
M8 / olive (5-
2
Mount the tubings for the air supply
￭ Screw the FEP tubings 250 mm onto the air supply connections
15
) into the electrode connector (3-2).
®
tubing (5-
11
) of the measuring vessel cover.
2
) to the tubing adapter
(3-3) of the Biodiesel Rancimat.
3
Insert the reaction vessel
￭ Fill the reaction vessel (5-
￭ After reaching the required temperature, insert the reaction vessel
10
) with the sample.
with the mounted reaction vessel cover in the openings provided
on the Biodiesel Rancimat.
4
Establish the tubing connections
￭ Connect the Iso-Versinic
®
tubing (5-
2
), which is fastened on the
measuring vessel cover, to the tubing connector (5-4) of the reaction vessel cover.
￭ Screw the FEP tubing 250 mm (5-
adapter M8 / olive (5-
11
) of the Biodiesel Rancimat, onto the thread
1
), which is fastened on the tubing
adapter M8 / M6 (5-3) of the reaction vessel cover.
3.2.5 Mounting the exhaust collection tube (optional accessories)
The optionally available exhaust collection tube 6.2757.000 can be mounted
on the 873 Biodiesel Rancimat for targeted removal of the exhaust air. In
addition to the exhaust collection tube, 8 Iso-Versinic® tubings 6.1839.000
also have to be ordered.
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16
873 Biodiesel Rancimat
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Proceed as follows to mount the collection tube:
1
Mount the exhaust collection tube
￭ Insert the exhaust collection tube with both nozzles into the collec-
tion tube holders (3-1) on the Biodiesel Rancimat in such a way that
the connection to the exhaust air removal is located to the rear.
2
Connect the measuring vessels
3 Installation
￭ Screw the tubing adapter M8 / olive (5-
(5-
12
) of the measuring vessel cover.
￭ Connect the one end of the Iso-Versinic
adapter M8 / olive.
￭ Insert the other end of the Iso-Versinic
ing opening on the collection tube.
￭ Seal the unused openings on the collection tube with the enclosed
plugs E.400.0010.
3
Connect the exhaust collection tube
￭ Connect a suitable tubing to the connection of the exhaust collec-
tion tube and connect this to an active suction device (e.g. water
jet pump).
3.3 Mains connection
Warning
There is a risk of fire if the instrument is operated with an incorrect mains
fuse!
11
) into the opening Out
®
tubing (5-2) to the tubing
®
tubing into the correspond-
Follow the regulations below for the mains connection.
3.3.1 Checking the mains voltage
Before switching the 873 Biodiesel Rancimat on for the first time, check
whether the mains voltage indicated on the type plate (3-7) corresponds to
the mains voltage present. If this is not the case, please contact Metrohm
Service.
873 Biodiesel Rancimat
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17
3.3 Mains connection
3.3.2 Replacing fuses
Two fuses 4 A (slow-acting) for 115 V or 2 A (slow-acting) for 230 V are
installed in the fuse holder (3-6) of the 873 Biodiesel Rancimat as standard.
Ensure that the instrument is never put into operation with fuses of
another type, otherwise there is a risk of fire!
Proceed as follows to replace defective fuses:
1
Pull out the mains cable
￭ Pull the mains cable out of the mains connection socket of the
2
Remove the fuse holder
￭ Use a screwdriver to loosen and completely pull out the fuse holder
3
Replace fuses
￭ Carefully take the defective fuses out of the fuse holder and replace
4
Insert the fuse holder
￭ Push the fuse holder back into the instrument until it latches into
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
Warning
Biodiesel Rancimat.
(3-6) above the mains connection socket.
them with two new fuses suitable for the set mains voltage of the
type TH (slow-acting, with high switching capacity):
– 115 V 4 A (TH) Metrohm No.: U.600.0022
– 230 V 2 A (TH) Metrohm No. U.600.0107
place.
3.3.3 Mains cable and mains connection
Mains cable
The mains cable optionally supplied for the instrument
￭ 6.2122.020 with plug SEV 12 (Switzerland)
￭ 6.2122.040 with plug CEE(7), VII (Germany, …)
￭ 6.2122.070 with plug NEMA 5-15 (USA, …)
is three-core and provided with a plug with grounding pin. If another plug
has to be mounted, the yellow/green conductor (IEC standard) must be
connected to the protective ground (protection class I).
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18
873 Biodiesel Rancimat
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
Warning
Any interruption to the grounding within or outside the instrument can
make it dangerous!
Mains connection
Plug the mains cable into the mains connection socket of the Biodiesel Rancimat.
3.3.4 Switching the instrument on/off
The Biodiesel Rancimat is switched on and off using the mains switch. When
switching the instrument on, the pilot lamp ON lights up on the front of the
instrument auf.
3.4 Connecting a PC
3.4.1 Connecting the 873 Biodiesel Rancimat and the PC
3 Installation
Caution
Always switch the Biodiesel Rancimat and PC off before you connect the
two devices with the RS-232 cable 6.2134.100.
The PC program 873 Biodiesel Rancimat allows control of max. 4 instru-
ments. The following options are available for connecting the instruments
to serial PC interfaces:
￭ Connection to integrated COM interfaces of the PC
￭ Connection to an additional integrated interface expansion card
Connect the RS-232 interface of the Biodiesel Rancimat to the required serial
COM port on the PC using the RS-232 cable 6.2134.100 (9-pin/9-pin). For
25-pin COM ports, the optional RS-232 cable 6.2125.110 (not in the scope
of delivery) or a commercially available adapter must be used.
3.4.2 Installing the software
3.4.2.1 System requirements
Operating system Windows 2000, Windows XP Professional, Win-
dows Vista
873 Biodiesel Rancimat
RAM 256 MB (Windows 2000 / Windows XP)
1 GB (Windows Vista)
Processor Pentium III or higher
￭￭￭￭￭￭￭￭
19
3.4 Connecting a PC
Memory approx. 20 MB for program files
RS-232 interface one free RS-232 interface (COM)
The windows user must have administrator rights in order to be able to install
873 Biodiesel Rancimat.
3.4.2.2 Installing the program
Proceed as follows to install 873 Biodiesel Rancimat:
1
Start the installation program
￭ Place the installation CD in the CD drive. The installation program is
started automatically.
If this option is deactivated on your computer, double click the file
Setup.exe.
Windows Vista: Select the option "Approve".
￭ Click on 873.
2
Select the dialog language
￭ Select the dialog language of the program.
￭ Click on the [OK] button.
￭ Click on the [Next >] button.
3
Accept the license agreement
￭ Read through the license agreement and accept it with [Yes].
4
Define a target folder for the program
￭ If required, choose another folder than the default target folder for
the program files. For that, click on the [Browse...] button.
￭ Confirm the target folder with [Next >].
5
Define the components of the program
￭ Click on the [Next >] button.
6
Define a target folder for the program icon
￭ Choose or enter the program folder of the Start menu in which the
program icon is to be inserted and confirm with [Next >].
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
￭￭￭￭￭￭￭￭
20
The program will be installed.
7
Complete the installation
￭ Click on the [Finish] button after the successfully completed instal-
lation.
The installation program will be exited.
873 Biodiesel Rancimat
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
3.4.2.3 Windows Vista
If you run the software 873 Biodiesel Rancimat on a computer with Windows Vista, you need a special update in order to be able to display the
help. Due to licensing reasons you have to download this file from a
Microsoft web page. On the installation CD the link "Download Win-
Help.url" to the corresponding Microsoft web page can be found in the
folder "Vista Update for HLP help". Download the necessary installation file and save it.
Proceed as follows to install the update:
￭ Exit 873 Biodiesel Rancimat if you have started the software after
1
￭ Start the installation file by double-clicking and follow the instruc-
3 Installation
Caution
the installation.
tions of the installation program.
3.4.3 Carrying out basic settings
Setting the Administrator password
When starting the program for the first time, the Administrator password
must be set. Proceed as follows:
1
Switch on the instruments
￭ Check whether the Biodiesel Rancimat is correctly connected to the
PC (see Chapter 3.4.1, page 19).
￭ Switch on the Biodiesel Rancimat using the mains switch.
￭ Switch on the PC.
2
Start program
￭ In the Windows Start menu under Programs ▶ Metrohm ▶ Bio-
diesel Rancimat, click on the menu item Biodiesel Rancimat.
The login window for the Administrator opens:
873 Biodiesel Rancimat
￭￭￭￭￭￭￭￭
21
3.4 Connecting a PC
3
Set Administrator password
￭ Do not enter a password, instead click on [OK].
￭ Confirm the displayed message with [OK].
The following dialog window appears:
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
￭ Leave the Old password field empty.
￭ Enter a new password for the Administrator in the New pass-
word field.
￭ Reenter the password in the Confirm new password field and
confirm with [OK].
The dialog window Login opens again:
4
Log in as Administrator
￭ Enter the Administrator password set before in the Password field
and confirm with [OK].
￭ Confirm the message "There are no units configured yet!" with
[OK].
￭￭￭￭￭￭￭￭
22
873 Biodiesel Rancimat
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