Metrohm 763 PVC Thermomat User manual

CH-9101 Herisau/Switzerland
Phone ++41 71 353 85 85
Fax ++41 71 353 89 01
Internet www.metrohm.ch
E-Mail [email protected]
763 PVC Thermomat
with «763 PVC Thermomat 1.0»PC program
763PVCThermomat
8.763.1003 Instructions for Use
26.10.1999 / dö

Contents
763 PVC Thermomat I
Table of contents
1 Introduction............................................................................................................1
1.1 Determination of thermal stability........................................................1
1.2 Instrument description .................................................................................2
1.3 Operating elements ........................................................................................3
1.4 Information about these Instructions for Use................................6
1.4.1 Organization................................................................................................. 6
1.4.2 Notation and pictograms............................................................................ 7
1.5 Safety notes.........................................................................................................8
1.5.1 Electrical safety ........................................................................................... 8
1.5.2 General precautionary rules...................................................................... 8
2 Installation..............................................................................................................9
2.1 Setting up the instrument...........................................................................9
2.1.1 Packaging ..................................................................................................... 9
2.1.2 Check............................................................................................................. 9
2.1.3 Location ........................................................................................................ 9
2.2 Attaching the accessories.......................................................................10
2.2.1 Accessories for external gas supply...................................................... 10
2.2.2 Reaction and measuring vessels............................................................ 10
2.2.3 Exhaust collection tube (option)............................................................. 11
2.3 Mains connection..........................................................................................13
2.3.1 Checking the mains voltage.................................................................... 13
2.3.2 Exchange of fuses..................................................................................... 13
2.3.3 Mains cable and mains connection........................................................ 14
2.3.4 Switching the instrument on/off ............................................................. 14
2.4 Connection to the PC..................................................................................15
2.4.1 Connection PVC Thermomat – PC.......................................................... 15
2.4.2 Software installation................................................................................. 15
2.4.3 Basic settings............................................................................................. 16
3 Operating tutorial....................................................................................... 19
3.1 Determinations ...............................................................................................19
3.1.1 Installation.................................................................................................. 19
3.1.2 Preparing for determinations .................................................................. 20
3.1.3 Carrying out determinations.................................................................... 22
3.2 Results .................................................................................................................24
3.2.1 Determination overview............................................................................ 24
3.2.2 Determination and method data ............................................................. 26
3.2.3 Graphics...................................................................................................... 28

Contents
763 PVC ThermomatII
4 Operation...............................................................................................................31
4.1 Fundamentals of the operation............................................................ 31
4.1.1 Starting/closing the program.................................................................. 31
Start the «763 PVC Thermomat» program................................................31
Close the «763 PVC Thermomat» program..............................................31
4.1.2 Glossary...................................................................................................... 32
4.1.3 Control window ......................................................................................... 33
Open ........................................................................................................33
Arrangement.............................................................................................33
Menus ......................................................................................................33
Icons.........................................................................................................34
Close ........................................................................................................34
4.1.4 Results window ......................................................................................... 35
Open ........................................................................................................35
Arrangement.............................................................................................35
Menus ......................................................................................................35
Icons.........................................................................................................36
Close ........................................................................................................36
4.1.5 Overview of file types............................................................................... 37
4.1.6 Context-sensitive menus......................................................................... 37
4.1.7 Mouse functions........................................................................................ 37
4.1.8 Help.............................................................................................................. 37
4.2 Instrument and software settings...................................................... 38
4.2.1 Communication ......................................................................................... 38
4.2.2 User permissions...................................................................................... 39
Functions for groups................................................................................39
Functions for users ..................................................................................40
4.2.3 Timer............................................................................................................ 41
4.2.4 Gas flow control........................................................................................ 41
4.2.5 Recording temperature ............................................................................ 42
4.2.6 Options........................................................................................................ 43
Save settings............................................................................................43
Clear sample ID1 history..........................................................................43
4.3 Program information................................................................................... 44
4.3.1 Unit information......................................................................................... 44
4.3.2 Status overview......................................................................................... 45
4.3.3 Events overview ........................................................................................ 46
Event window ...........................................................................................46
Menus ......................................................................................................47
Icons.........................................................................................................47
Filter..........................................................................................................47
Parameter for event recording .................................................................47

Contents
763 PVC Thermomat III
4.4 Calibration functions ..................................................................................48
4.4.1 Determination of cell constants.............................................................. 48
Manual entry of cell constants ................................................................ 48
Automatic determination of cell constants.............................................. 48
4.4.2 Determination of Delta T .......................................................................... 50
Preparations ............................................................................................ 50
Carrying out............................................................................................. 52
4.5 Methods...............................................................................................................54
4.5.1 Method handling........................................................................................ 54
Create method......................................................................................... 54
Open method .......................................................................................... 54
Method manager..................................................................................... 54
Save method ........................................................................................... 55
Print method report.................................................................................. 55
4.5.2 Method parameters ................................................................................... 55
Overview.................................................................................................. 55
Parameters .............................................................................................. 56
Evaluation ................................................................................................ 58
Induction time.......................................................................................... 59
Stability time ............................................................................................ 59
Curves ..................................................................................................... 60
Formulas.................................................................................................. 61
Standards ................................................................................................ 62
Documentation........................................................................................ 63
Description .............................................................................................. 64
4.6 Determinations ...............................................................................................65
4.6.1 Flow chart ................................................................................................... 65
4.6.2 Sample preparation................................................................................... 66
4.6.3 Prepare instruments and accessories................................................... 66
Clean instruments and accessories........................................................ 66
Prepare measuring vessels..................................................................... 67
Prepare reaction vessels......................................................................... 68
4.6.4 Carry out determinations......................................................................... 69
Select method ........................................................................................ 69
Switch on heating.................................................................................... 69
Enter sample identifiers........................................................................... 70
Insert reaction vessels............................................................................. 70
Start determination .................................................................................. 70
Live curve ................................................................................................ 71
Live parameters....................................................................................... 71
Stop determination .................................................................................. 72
4.7 Results..................................................................................................................73
4.7.1 Determination overview............................................................................ 73
Open determination overview ................................................................. 73
Format determination overview............................................................... 74
Mark determinations................................................................................ 78
Find determination .................................................................................. 78
Delete determinations ............................................................................. 79
Sort and filter determinations .................................................................. 80

Contents
763 PVC ThermomatIV
4.7.2 Determination and method data............................................................. 84
Open view ................................................................................................84
Determination...........................................................................................84
Results......................................................................................................85
Method .....................................................................................................86
Parameters...............................................................................................87
Evaluation.................................................................................................88
Formulas ..................................................................................................89
Standards.................................................................................................90
Curves ......................................................................................................90
Documentation.........................................................................................91
Warnings ..................................................................................................92
4.7.3 Graphics and reevaluation ...................................................................... 93
Single graph.............................................................................................93
Multiple graph ..........................................................................................93
Live graph.................................................................................................94
Switch zoom on/off ..................................................................................95
Switch autoscaling on/off.........................................................................95
Switch offset on/off...................................................................................95
Copy graph to clipboard..........................................................................95
Print graph................................................................................................95
Reevaluation.............................................................................................96
4.7.4 Extrapolation.............................................................................................. 99
Extrapolation window ...............................................................................99
Print extrapolation results.......................................................................100
Settings for extrapolation .......................................................................101
Parameters for extrapolation..................................................................101
4.7.5 Recalculation ........................................................................................... 102
Recalculation window ............................................................................102
Method ...................................................................................................102
Formulas ................................................................................................103
Standards...............................................................................................104
4.7.6 Data export and printing........................................................................ 106
Copy to clipboard ..................................................................................106
Export to other database........................................................................106
Export to Microsoft Word .......................................................................106
Export to Microsoft Excel .......................................................................106
Export of measured values ....................................................................107
Export of determination and method data.............................................107
Printing of results in the control window ................................................108
Printing of data in the results window ....................................................109
4.7.7 Options...................................................................................................... 110
Program settings....................................................................................110
Report settings.......................................................................................110
Company settings..................................................................................111
Results....................................................................................................112
Scaling....................................................................................................112
Extrapolation ..........................................................................................113
Live graph...............................................................................................114
Options for the administrator .................................................................114
Save settings..........................................................................................115
4.7.8 Windows................................................................................................... 115
Tile windows vertically............................................................................115
Tile windows horizontally........................................................................115
Cascade windows..................................................................................115
Arrange icons.........................................................................................115
Close all windows ..................................................................................115

Contents
763 PVC Thermomat V
4.8 GLP ...................................................................................................................... 116
4.8.1 General information about GLP and validation.................................. 116
4.8.2 GLP properties......................................................................................... 117
4.8.3 GLP status................................................................................................ 117
4.8.4 GLP tests................................................................................................... 118
GLP temperature test ............................................................................ 118
GLP conductivity test............................................................................. 123
GLP gas flow test .................................................................................. 126
4.8.5 GLP results............................................................................................... 128
Print GLP certificate............................................................................... 128
View GLP results.................................................................................... 128
Print GLP results.................................................................................... 130
5 Maintenance – Faults..........................................................................131
5.1 Maintenance and service...................................................................... 131
5.1.1 Care............................................................................................................ 131
5.1.2 Maintenance by Metrohm service......................................................... 131
5.2 Faults and malfunctions ........................................................................ 132
5.2.1 Error messages in the PC program...................................................... 132
5.2.2 Status and error messages on the instrument................................... 132
6 Appendix .............................................................................................................135
6.1 Technical data ............................................................................................. 135
6.1.1 General information................................................................................ 135
6.1.2 Temperature regulation and measurement......................................... 135
6.1.3 Conductivity measurement.................................................................... 136
6.1.4 Gas flow regulation................................................................................. 136
6.1.5 GLP test set.............................................................................................. 136
6.1.6 RS232 interface........................................................................................ 136
6.1.7 Mains connection.................................................................................... 137
6.1.8 Safety specifications............................................................................... 137
6.1.9 Electromagnetic compatibility (EMC) .................................................. 137
6.1.10 Ambient temperature.............................................................................. 138
6.1.11 Housing..................................................................................................... 138
6.2 Standard equipment................................................................................. 139
6.3 Optional accessories ............................................................................... 142
6.4 Warranty and conformity....................................................................... 143
6.4.1 Warranty.................................................................................................... 143
6.4.2 Software license ...................................................................................... 143
6.4.3 EU Declaration of conformity................................................................ 144
6.4.4 Certificate of conformity and system validation................................ 145
6.5 Index................................................................................................................... 146

Contents
763 PVC ThermomatVI
List of figures
Fig. 1:Schematic measuring arrangement ............................................................... 1
Fig. 2:Front of the 763 PVC Thermomat ................................................................... 3
Fig. 3:Rear of the 763 PVC Thermomat.................................................................... 4
Fig. 4:Installation of reaction and measuring vessels ............................................ 12
Fig. 5:Accessories for Delta-T determination ......................................................... 51
Fig. 6:Accessories for GLP temperature test........................................................ 121
Fig. 7:Indicator lamps ........................................................................................... 132
List of numbered parts and controls
11 Reaction vessel............................. 3,12,51
22 Reaction vessel cover...................3,12,51
33 Connecting tubing .............................3,13
44 Measuring vessel............................... 3,13
55 Measuring vessel cover.....................3,13
66 Connecting tubing .......................3,12,51
77 Mains pilot lamp ..............................3,132
88 Gas flow display .............................3,132
99 Temperature display........................3,132
1010 Error display.....................................3,132
1111 Instrument display ........................... 3,132
1212 Mains switch ...........................................5
1313 Mains connection plug ........................... 5
1414 Fuse holder.............................................5
1515 Model plate.............................................5
1616 PC connection ........................................5
1717 Pt100 connection.................................... 5
1818 Connection "N2in"................................... 5
1919 Gas supply connection...........................5
2020 Electrode connection.............................. 5
2121 Mounting for exhaust collection tube .....5
2222 Connection piece..................................12
2323 Opening "Out" .......................................12
2424 Opening "In" ..........................................12
2525 Marking field..........................................12
2626 Connection plug....................................12
2727 PTFE tube..............................................12
2828 Electrodes .............................................12
2929 Protective ring .......................................12
3030 Connection nipple............................12,51
3131 Connection.......................................12,51
3232 Gas inlet tube (short) ............................12
3333 Sealing ring ......................................12,51
3434 Connection.......................................12,51
3535 Gas inlet tube (long)..............................51
3636 Temperature sensor Pt100.............51,121
3737 Distance piece ...............................51,121
3838 PTFE cylinder ......................................121
3939 Hexagonal screw.................................121
4040 Allen key..............................................121
4141 Aluminium cylinder..............................121

1.1 Determination of thermal stability
763 PVC Thermomat 1
1 Introduction
1.1 Determination of thermal stability
The determination of the thermal stability of polyvinyl chloride according
to DIN 53 381, part 1, is based on the fact that PVC decomposes at
higher temperatures with the release of HCl. The hydrochloric acid
formed is taken up by a gas stream (normally N2) and transferred into
the measuring vessel where it is absorbed in the measuring solution
(dist. water). The decomposition process is monitored by measuring
the conductivity of the aqueous HCl solution. Both the stability time and
the induction time are determined. The stability time is defined as the
time required to achieve a conductivity difference of 50 µS/cm. The in-
duction time is the time that elapses before the conductivity starts to
rise sharply. The method is used for testing PVC in all stages of proc-
essing as well as for testing stabilizers.
Fig. 1: Schematic measuring arrangement
Measuring
solution
Conductivity
measuring cell
Measuring
vessel
PVC
Heating block
Reaction vessel
N2

1 Introduction
763 PVC Thermomat2
1.2 Instrument description
The 763 PVC Thermomat is a PC-controlled instrument for determin-
ing the thermal stability of PVC and similar halogenated plastics and is
available in the following two versions:
• 2.763.0014 PVC Thermomat for 230 V, 50……60 Hz
• 2.763.0015 PVC Thermomat for 115 V, 50……60 Hz
The 763 PVC Thermomat is equipped with two heating blocks each
with 4 measuring positions. Each block can be individually heated, i.e.
2 sets of 4 samples can be measured at two different temperatures or 8
samples can be measured at the same temperature. Measurements at
the individual measuring positions can be started individually.
The complete operation of the 763 PVC Thermomat is carried out via a
PC connected to the RS232 interface with the aid of the «763 PVC
Thermomat» control and evaluation program. Up to 4 instruments can
be connected to 1 PC allowing a maximum of 32 samples to be ana-
lyzed at the same time. The evaluation algorithm of the PC program
determines the point of inflection of the Thermomat curve and therefore
the induction time fully automatically. Apart from the induction time,
the so-called stability time, i.e. the time taken until a certain alteration
in the conductivity is reached, can also be determined. The results ob-
tained can be subjected to further mathematical processes. In particu-
lar, induction times can be converted to the standard temperatures
contained in the relevant standards.
Each Thermomat curve can also be evaluated manually. A PC-suppor-
ted tangent method is available for this in which the tangents can be
applied to the curve as required. This means that evaluations are pos-
sible even in extreme cases.
The results of the determinations are stored in a database together
with all the data concerning the method and determination. In the re-
sults display part of the program determinations can be searched for,
sorted, filtered, exported and printed out. Apart from the graphical dis-
play of single and multiple curves it is also possible to carry out recal-
culations with altered parameters and to extrapolate the results to a
particular temperature.
GLP (Good Laboratory Practice) and instrument validation are continu-
ously increasing in importance. In the 763 PVC Thermomat GLP tests
are provided for the measurement of temperature, conductivity and gas
flow. They determine whether and which tests are to be carried out. The
time interval between the tests and the required accuracy can also be
laid down as required. If the GLP function is selected then on each re-
sult report a remark will be made as to whether the GLP test require-
ments have been fulfilled. As an option Metrohm offers a GLP test set
(6.5616.000), with which the most important tests can be carried out.

1.3 Operating elements
763 PVC Thermomat 3
1.3 Operating elements
763PVC Thermomat
11
1111
22
33
44
55
66
1010
99
88
77
Fig. 2: Front of the 763 PVC Thermomat
11 Reaction vessel (6.1429.040) 77 Mains pilot lamp
lit up when instrument switched on
22 Reaction vessel cover (6.2753.100) 88 Gas flow display
lit up when gas flow switched on
33 Connecting tubing (6.1816.010)
between reaction vessel and measuring
vessel
99 Temperature display
flashes when heating switched on
lit up when temperature reached
44 Measuring vessel (6.1428.100) 1010 Error display (red)
lit up at error
55 Measuring vessel cover (6.0913.130)
with built-in conductivity measuring cell
1111 Instrument display
indicates numbers (1…4) of units
connected
66 Connecting tubing (6.1805.080)
for gas supply into reaction vessel

1 Introduction
763 PVC Thermomat4
2
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
220-240V: 2A(TH)
Type:
Nr.:
U:
f:
S:
1919
1212 1313 1414 1515 1616 1717 1818
2121
2020
Fig. 3: Rear of the 763 PVC Thermomat

1.3 Operating elements
763 PVC Thermomat 5
1212 Mains switch
to switch instrument on and off:
I = ON 0 = OFF
1313 Mains connection plug
mains connection, see section 2.3
1414 Fuse holder
changing the fuses, see section 2.3
1515 Model plate
indicating mains voltage and serial
number
1616 PC connection
RS232 interface
1717 Pt100 connection
Connection for external temperature
sensor
1818 Connection "N2in"
1919 Gas supply connection
for connection tubing 66
2020 Electrode connection
for measuring vessel cover 55
2121 Mounting
for 6.2757.000 Exhaust collection tube
(option)

1 Introduction
763 PVC Thermomat6
1.4 Information about these Instructions for Use
Please read through these Instructions for Use carefully before you put
the 763 PVC Thermomat into operation. The Instructions for Use
contain information and warnings to which the user must pay attention
in order to assure safe operation of the instrument.
1.4.1 Organization
These 8.763.1003 Instructions for Use for the 763 PVC Thermomat
provide a comprehensive overview of the installation, startup proce-
dure, operation, fault rectification and technical specifications of this in-
strument. The Instructions for Use are organized as follows:
Section 1 Introduction
Measuring method, description of instrument,
operating elements and safety notes
Section 2 Installation
Installation of accessories, mains connection,
connection to PC
Section 3 Operating tutorial
Introduction to the operation using an example
Section 4 Operation
Detailed description of the operation
Section 5 Maintenance – Faults
Maintenance, fault display and fault rectification
Section 6 Appendix
Technical data, standard equipment, options, war-
ranty, declarations of conformity, index
To find the required information on the instruments, you will find it an
advantage to use either the Table of contents or the Index at the
back.
You will find additional information on the PVC Thermomat method in
the relevant "Application Bulletins", which are available on request
free of charge from your Metrohm agency, as well as in the
"Application Notes" concerning the PVC Thermomat method, which
can be downloaded from the Internet under «www.metrohm.ch».

1.4 Information about these Instructions for Use
763 PVC Thermomat 7
1.4.2 Notation and pictograms
The following notations and pictograms (symbols) are used in these In-
structions for Use:
Range Menu item, parameter or
entry value
763 PVC THERMOMAT RESULTS Program window
<OK> Button
[ Ctrl ] Key
3535 Operating element of 763
Hazard
This symbol draws attention to a
possible danger to life or of injury if
the associated directions are not
followed correctly.
Warning
This symbol draws attention to
possible damage to instruments or
instrument parts if the associated
directions are not followed cor-
rectly.
Caution
This symbol marks important infor-
mation. First read the associated
directions before you continue.
Comment
This symbol marks additional in-
formation and tips.

1 Introduction
763 PVC Thermomat8
1.5 Safety notes
1.5.1 Electrical safety
While electrical safety in the handling of the 763 PVC Thermomat is as-
sured in the context of the specifications IEC 1010-1 (protection class 1,
degree of protection IP20), the following points should be noted:
• Mains connection
Setting of the mains voltage, checking the mains fuse and the
mains connection must be effected in accordance with the instruc-
tions in section 2.3.
• Opening the 763 PVC Thermomat
If the 763 PVC Thermomat is connected to the power supply, the
instrument must not be opened nor must parts be removed from it,
otherwise there is a danger of coming into contact with components
which are live. Hence, always disconnect the instrument from all
voltage sources before you open it and ensure that the mains cable
is disconnected from mains connection 1313 !
• Protection against static charges
Electronic components are sensitive to static charging and can be
destroyed by discharges. Before you touch any of the components
inside the 763 PVC Thermomat, you should earth yourself and any
tools you are using by touching an earthed object (e.g. housing of the
instrument or a radiator) to eliminate any static charges which exist.
1.5.2 General precautionary rules
• Take care with hot reaction vessels
Avoid any contact with hot reaction vessels. Place them in the sup-
plied vessel holder to cool them down.

2.1 Setting up the instrument
763 PVC Thermomat 9
2 Installation
2.1 Setting up the instrument
2.1.1 Packaging
The 763 PVC Thermomat is supplied together with the separately
packed accessories in special packaging containing shock-absorbing
foam linings designed to provide excellent protection. The instrument
itself is packed in an evacuated polyethylene bag to prevent the ingress
of dust. Please store all these special packaging as only they assure
transport of the instrument free from damage.
2.1.2 Check
After receipt, immediately check whether the shipment is complete and
has arrived without damage (compare with delivery note and list of
accessories in section 6.2). In the case of transport damage, see
instructions in section 6.4.1 "Warranty".
2.1.3 Location
Position the instrument in the laboratory at a location convenient for op-
eration, free from vibrations and protected against a corrosive atmos-
phere and contamination by chemicals. It is advisable to set up the in-
strument in a fume cupboard to guard against odor emission, but the
PC can be positioned outside on the regular laboratory bench.
In order to improve accessibility to the measuring places the instru-
ment can also be placed on the 6.2059.000 Rotation ring, which is
available as an option.

2 Installation
763 PVC Thermomat10
2.2 Attaching the accessories
2.2.1 Accessories for external gas supply
Nitrogen (N2) is required for external gas supply to the 763 PVC Ther-
momat. The following accessories must be mounted on the rear panel
of the PVC Thermomat:
1Fitting the connecting tubing
• Screw one end of connecting tubing 6.1805.030 (150 cm)
onto connection 1818 "N2in" on the rear panel of the PVC
Thermomat (see Fig. 3).
• Screw the 6.1808.020 connection piece onto the other end of
connecting tubing 6.1805.030.
2Connect up gas supply
• Attach the gas supply from the cylinder containing nitrogen to
the tubing nozzle of 6.1808.020 Connection piece.
• Set gas pressure at the nitrogen cylinder to ca. 1.5 bar using
the reducing valve.
2.2.2 Reaction and measuring vessels
Fig. 4 shows the details of how the accessories for measuring the ther-
mal stability are to be attached and connected to each other. Proceed
as follows:
1Fitting the measuring vessel cover
• Insert PTFE tube 2727 from above into opening 2424 "In" of
measuring vessel cover 55.
• Screw connection piece 2222 into opening 2424 of measuring
vessel cover 55.
2Inserting the measuring vessel in the instrument
• Fill 60 mL dist. water into measuring vessel 44.
• Place measuring vessel cover 55 on measuring vessel 44.
• Insert measuring vessel 44 with attached measuring vessel
cover 55 into the opening provided for it on the 763 PVC
Thermomat and connect measuring vessel cover 55 with con-
nection plug 2626 to electrode connection 2020 (see Fig. 3).
3Fitting the reaction vessel
• Insert gas inlet tube 3232 from below into connection 3434 of
reaction vessel cover 22.
• Push sealing ring 3333 over the upper end of gas inlet tube 3232.
• Screw connection nipple 3030 loosely into connection 3434 and
press gas inlet tube 3232 against connection nipple 3030 from
below; then fix gas inlet tube 3232 to reaction vessel cover 22 by
firmly tightening connection nipple 3030.

2.2 Attaching the accessories
763 PVC Thermomat 11
• Place reaction vessel cover 22 on reaction vessel 11.
• Connect the white connecting tubing 33 to connection 3131 of
reaction vessel cover 22 (see Fig. 3).
4Inserting the reaction vessel into the instrument
• Place the sample in the reaction vessel (see section 4.6.2).
• When the required temperature has been reached insert
reaction vessel 11 with attached reaction vessel cover 22 in the
openings provided for it on the 763 PVC Thermomat.
5Making the tubing connections
• Connect the white connecting tubing 33 attached to reaction
vessel cover 22 to connection piece 2222 of measuring vessel
cover 55.
• Screw one end of brown connecting tubing 66 to connection
nipple 3030 of reaction vessel cover 22.
• Screw the other end of brown connecting tubing 66 to the
corresponding connection 1919 on the 763 PVC Thermomat
(see Fig. 3).
The 6.1428.020 transparent glass measuring vessel
available as an option can be used instead of the
6.1428.100 polycarbonate measuring vessel; in
contrast to the polycarbonate vessel this can be
cleaned with acetone.
2.2.3 Exhaust collection tube (option)
For selective exhaust lead off the 6.2757.000 Exhaust collection
tube available as an option can be fitted to the 763 PVC Thermomat. In
addition to the exhaust collection tube 8 x 6.1816.010 Silicone tubing
(22 cm) must also be ordered. Attach the exhaust collection tube as
described below:
1Positioning the exhaust collection tube
• Place the exhaust collection tube with the two supports in the
two mountings 2121 (see Fig. 3) on the 763 PVC Thermomat so
that the connection for leading off the exhaust is located to
the rear.
2Connecting the measuring vessel
• Screw a connection piece 2222 into opening 2323 of the measur-
ing vessel cover 55.

2 Installation
763 PVC Thermomat12
33
66
3030
3131
3232
3333
3434
22
11
44
55
2323
2222
2424
2525
2626
2727
2828
2929
Fig. 4: Installation of reaction and measuring vessels
11 Reaction vessel (6.1429.040) 2626 Connection plug
22 Reaction vessel cover (6.2753.100) 2727 PTFE tube (6.1819.080)
for air supply into measuring vessel
33 Connecting tubing (6.1816.010) 2828 Electrodes
44 Measuring vessel (6.1428.100) 2929 Protective ring (4.422.0520)
55 Measuring vessel cover (6.0913.130)
with built-in conductivity measuring cell
3030 Connection nipple (6.1808.090)
66 Connecting tubing (6.1805.080)
for gas supply to reaction vessel
3131 Connection
for connecting tubing 33
2222 Connection piece (6.1808.050) 3232 Gas inlet tube (6.2418.110)
2323 Opening "Out"
for measuring vessel exhaust
3333 Sealing ring (6.1454.040)
2424 Opening "In"
for measuring vessel inlet
3434 Connection
for connection nipple 3030
2525 Marking field
for entering the cell constant

2.3 Mains connection
763 PVC Thermomat 13
• Connect one end of the 6.1816.010 Silicone tubing to con-
nection piece 2222.
• Plug the other end of the 6.1816.010 Silicone tubing into the
corresponding exhaust collection tube opening.
• Close the unused openings on the exhaust collection tube
with the included E.400.0010 stoppers.
3Connecting the exhaust collection tube
• Attach a piece of suitable tubing to the exhaust collection
tube connection and connect it to an active aspirating device
(e.g. water-jet pump).
2.3 Mains connection
Follow the instructions below for connecting to the power supply. If
the instrument is operated with a mains voltage set wrongly and/or
wrong mains fuse, there is a danger of fire!
2.3.1 Checking the mains voltage
Before switching on the 763 PVC Thermomat for the first time, check
that the mains voltage indicated on the model plate 1515 (see Fig. 3)
matches the local mains voltage. If this is not the case, call the
Metrohm service.
2.3.2 Exchange of fuses
Two fuses 4A/slow-blow for 115 V or 2A/slow-blow for 230 V are in-
stalled in fuse holder 1414 of the 763 PVC Thermomat as standard.
Ensure that the instrument is never put into operation with fuses of
another type, otherwise there is danger of fire!
For changing fuses, proceed as follows:
1Disconnect mains cable
Disconnect mains cable from mains connection plug 1313 of the
763 PVC Thermomat.
2Remove fuse holder
Using a screwdriver, loosen fuse holder 1414 above the mains
connection plug 1313 and take out completely.