4.4.2 Setting a temperature................15 4.4.3 Self-optimization of the control parameters..........16 4.4.4 Key lock function..................16 Working procedure................ 17 4.5.1 Preparing the 832 KF Thermoprep/756/831 Coulometer system ..18 4.5.2 Determination with blank value subtraction..........18 4.5.3 Determination without blank value subtraction........19 Practical information ..............20...
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8.2.1 832 KF Thermoprep................25 Optional accessories..............27 8.3.1 Sample vials....................27 Warranty and conformity............... 28 8.4.1 Warranty ....................28 8.4.2 EU Declaration of Conformity for 832 KF Thermoprep ......29 8.4.3 Declaration of Conformity ...............30 Index List of illustrations Fig. 1 Front view ........................3 Fig.
It has been designed for use in production and laboratories and covers a wide range of applications. The 832 KF Thermoprep can be used wherever it is necessary to heat up a solid or liquid sample and/or to drive off water by the application of heat.
1.2 Information about these Instructions for Use 1.2 Information about these Instructions for Use Please read through these Instructions for Use before you start to use the 832 KF Thermoprep. The following notations and pictograms are used in these instructions: Operating element The operating elements are explained on pages 3ff.
1.3.4 Sample holder for standard vials The dimensions of the 6.2063.000 sample holder are optimized for the Metrohm 6.2419.007 standard sample vials (6 mL). This ensures the highest possible heat flow from the oven to the sample. If other sample containers with different dimensions shall be used custom made sample holders can be delivered.
This instrument must only be operated at the specified mains voltage. Repair and maintenance: If faults or malfunctions occur while using the 832 KF Thermoprep we recommended that you first check that the connection to the control in- strument has been made correctly.
Installation This section describes the things you should pay attention to when un- packing and starting up the 832 KF Thermoprep. It also tells you how a complete automation system is built up. The following illustration provides an overview of the peripheral devices...
Setting the mains voltage Before you switch on the 832 KF Thermoprep for the first time please check that the mains voltage set on the instrument (see illustration on the following page) corresponds to your local mains voltage. If this is...
3.3 Assembling the 832 KF Thermoprep 3.3 Assembling the 832 KF Thermoprep 3.3.1 Assembling the needles • Screw spacer 3 (4.832.4190, L=58 mm) into distributor 39. For special requirements, e.g. different sample vials, custom-made spacers can be supplied, see p. 27.
832 KF Thermoprep. The free end of the When attaching the tubing please tubing is screwed onto the connection provided observe the following: for it on the guide head.
The titration vessel is adapted for the gas inlet in the following way: Instead 6.2730.020 Septum stopper, 6.2730.050 Stopper is used with 6.1543.060 Tip. (Nipple and O-ring of 6.2730.030 from the Titrino accessories.) Fig. 10 Volumetric KF cell 832 KF Thermoprep, Installation...
4.1 Inserting and removing sample vials As the oven of the 832 KF Thermoprep can reach a temperature of 250 °C, vials must only be inserted in or removed from the oven by us- ing crimping pliers or other tools. Hot vials should only be placed on temperature-resistant surfaces.
Fig. 13 Needle in lowered position 4.3 The pump The 832 KF Thermoprep is equipped with a powerful air pump, with which the released humidity of the sample can be transferred to a titra- tion cell in a constant carrier gas stream.
Altered set values are immediately accepted by the temperature con- troller. If the key lock function (tumbler switch 29 on the rear panel of the hous- ing) is switched on then no settings can be made. 832 KF Thermoprep, Operation...
4.4.4 Key lock function The temperature controller settings can be protected against accidental alteration. On the rear panel of the 832 KF Thermoprep the 'Key Lock' tumbler switch 29 can be switched to 'On'. If the key lock function is switched on the 'Temperature' tumbler switch 9 can still be used to select the two set temperatures T1 and T2.
Sample vials contain a considerable amount of atmos- pheric humidity, e.g. Metrohm standard vials with a volume of 6 mL can contain 60…150 µg water. While the determination is being carried out atmospheric moisture can also enter the coulometer cell as a result of leaks, etc.
4.5 Working procedure 4.5.1 Preparing the 832 KF Thermoprep/756/831 Coulometer system 1. Switch on the 832 KF Thermoprep. The oven heats up automati- cally to set temperature T1 or T2. 2. If necessary use the set value switch to alter set temperature T1 or 3.
7. Lower the needle until it reaches the stop. Enter the sample size at the coulometer and confirm it with <ENTER>. 8. After the determination wait for post-conditioning to be completed and, if necessary, carry out further determinations. 832 KF Thermoprep, Operation...
• Hydranal ® Manual, Water reagents for Karl-Fischer-Titration, Riedel- de Haën, 1987 • The following Metrohm Application Bulletins can be obtained free of charge: No. 109 Karl Fischer water determination with the KF drying oven No. 145 Determination of low water contents in plastics using the KF oven method No.
4.6 Practical information Maintenance information The 832 KF Thermoprep does not need a lot of care. Ensure that it does not become excessively dirty and is not exposed to corrosive atmos- pheres. • Renew used-up molecular sieve in good time. The molecular sieve should be exchanged as soon as increased drift values occur in the Karl Fischer cell.
According to IEC 61010, EN 61010, EN50093, protection class 3 Safety information The Instructions for Use contains safety information that must be observed by the user in order to ensure the safe operation of the instrument. 832 KF Thermoprep, Annex...
(at max. 85% relative humidity) Storage -20 °C…+60 °C Transport -40 °C…+60 °C 8.1.8 Dimensions and materials Height 49.5 cm Width 35.5 cm Depth 22.0 cm Weight approx. 8.9 kg (without accessories) Housing material Metal housing, surface-refined 832 KF Thermoprep, Annex...
8.2 Standard equipment 8.2 Standard equipment Immediately upon receipt of the instrument please check that the deliv- ery is complete. 8.2.1 832 KF Thermoprep Order no. 2.832.0020 Order no. Description 1.832.0020 832 KF Thermoprep KF oven for processing single samples in sealed vials.
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O-ring 6.2739.000 Tubing nipple wrench 6.2811.000 Molecular sieve, 250 g 6.2816.070 Penetration needle 6.2816.080 Outlet needle 6.2419.007 Sample vials, 6 mL 6.1448.057 Septum seals for sample vial 6.2419.007 8.800.1023 Instructions for Use for 832 KF Thermoprep 832 KF Thermoprep, Annex...
Septum seals for sample vial, 1000 ea. In order to use other sample vials with different dimensions the sample holder of the 832 KF Thermoprep must be replaced. Please contact your Metrohm distributor. For further accessories please see Metrohm Accessories Catalog.
Metrohm from any liability to pay compensation. If any instruments and parts have to be returned, the original packaging should be used if at all possible.
8.4 Warranty and conformity 8.4.2 EU Declaration of Conformity for 832 KF Thermoprep EU Declaration of Conformity The Metrohm Ltd. company, Herisau, Switzerland hereby certifies, that the instrument: 832 KF Thermoprep meets the requirements of EU Directives 89/336/EEC and 73/23/EEC.
International Certification Body (CB/IEC). The technical specifications are documented in the instruction manual. Metrohm Ltd. is holder of the SQS-certificate of the quality system ISO 9001 for quality assurance in design/development, production, installation and servicing. Herisau, May 30, 2002 Dr.
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