Metrohm 895 User manual
895 Professional PVC Thermomat
Manual
8.895.8001EN / 2020-02-25
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
www.metrohm.com
895 Professional PVC Thermomat
Manual
8.895.8001EN / 2020-02-25
Technical Communication
Metrohm AG
CH-9100 Herisau
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
895 Professional PVC Thermomat ￭￭￭￭￭￭￭￭ III
Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 About the documentation ................................................... 1
1.2.1 Symbols and conventions ........................................................ 2
1.3 Safety instructions ................................................................ 3
1.3.1 General notes on safety ........................................................... 3
1.3.2 Electrical safety ........................................................................ 3
1.3.3 Flammable solvents and chemicals ........................................... 4
1.3.4 Recycling and disposal ............................................................. 5
2 Overview of the instrument 6
2.1 Front of the instrument ........................................................ 6
2.2 Rear of the instrument ......................................................... 7
2.3 Instrument display ................................................................ 8
3 Installation 9
3.1 Setting up the instrument .................................................... 9
3.1.1 Packaging ................................................................................ 9
3.1.2 Checks .................................................................................... 9
3.1.3 Location .................................................................................. 9
3.2 Mounting accessories ......................................................... 10
3.2.1 Mounting the external nitrogen (N2) supply ........................... 10
3.2.2 Assembling the reaction and measuring vessels ..................... 11
3.2.3 Inserting vessels / Establishing tubing connections ................. 13
3.2.4 Mounting the exhaust air collection tube ............................... 14
3.3 Power connection ............................................................... 15
3.3.1 Connecting the instrument to the power grid ........................ 15
3.3.2 Replacing fuses ...................................................................... 16
3.3.3 Switching the instrument on and off ...................................... 17
3.4 Connecting a computer ...................................................... 18
3.4.1 Connecting the 895 Professional PVC Thermomat and the
computer .............................................................................. 18
4 Operation 20
4.1 Thermomat method ........................................................... 20
4.2 Calibration functions .......................................................... 21
4.2.1 Determining the cell constant ................................................ 21
4.2.2 Determining the temperature correction ................................ 22
4.3 Determinations ................................................................... 24
4.3.1 Preparing the instrument and the accessories ......................... 24
Table of contents ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
IV ￭￭￭￭￭￭￭￭ 895 Professional PVC Thermomat
4.3.2 Preparing the determination .................................................. 25
4.3.3 Cleaning the accessories ........................................................ 27
5 Operation and maintenance 29
5.1 General notes ...................................................................... 29
5.1.1 Care ...................................................................................... 29
5.1.2 Maintenance by Metrohm Service .......................................... 29
5.1.3 Cleaning the instrument ........................................................ 30
6 Troubleshooting 32
6.1 Problems .............................................................................. 32
7 Technical specifications 36
7.1 General data ........................................................................ 36
7.2 Temperature control and measurement ........................... 36
7.3 External temperature sensor ............................................. 37
7.4 Conductivity measurement ................................................ 37
7.5 Gas flow regulation ............................................................ 38
7.6 USB interface ...................................................................... 38
7.7 Power socket ...................................................................... 38
7.8 Ambient temperature ......................................................... 38
7.9 Dimensions/Material .......................................................... 39
8 Accessories 40
Index 41
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures
895 Professional PVC Thermomat ￭￭￭￭￭￭￭￭ V
Table of figures
Figure 1 Front 895 Professional PVC Thermomat ............................................. 6
Figure 2 895 Professional PVC Thermomat rear ............................................... 7
Figure 3 Instrument display ............................................................................. 8
Figure 4 Nitrogen supply connector .............................................................. 10
Figure 5 Equipping the reaction and measuring vessels ................................. 11
Figure 6 Mounting the air tube: correct - incorrect ........................................ 13
Figure 7 Instrument display with instrument name ........................................ 17
Figure 8 Instrument display with "no connection" symbol ............................. 17
Figure 9 Instrument display without instrument name and symbol ................ 17
Figure 10 Instrument display with serial number ............................................. 18
Figure 11 Measuring arrangement (schematic representation) ......................... 21
Figure 12 Assembling the reaction vessel for determining the temperature correc-
tion ................................................................................................. 22
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 1 Introduction
895 Professional PVC Thermomat ￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
The 895 Professional PVC Thermomat is a computer-controlled measuring
instrument for determining the thermostability of PVC.
It is equipped with two heating blocks each with 4 measuring positions.
Each block can be heated individually, i.e., 4 samples can each be mea-
sured at two different temperatures or 8 samples at the same tempera-
ture. The measurements at the individual measuring positions can be
started individually for this.
The 895 Professional PVC Thermomat is controlled by means of the
StabNet computer software and a computer that is connected via the
USB interface. Up to 4 instruments can be controlled and monitored by
each computer, hence allowing a maximum of 32 samples to be analyzed
at the same time.
StabNet determines the stability time fully automatically. Besides the
stability time, the so-called induction time can also be determined.
The results of the determinations are saved in a database together with all
method and determination data. Determinations can be searched for,
sorted, filtered, exported and printed in the Database program part.
Apart from graphically displaying individual and multiple curves, the soft-
ware is also capable of conducting recalculations with changed parame-
ters and extrapolating the results to a certain temperature.
1.2 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.
1.2 About the documentation ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
2￭￭￭￭￭￭￭￭ 895 Professional PVC Thermomat
1.2.1 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.
Table of contents
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