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Summary of Contents for Metrohm 874
- Page 1 874 Oven Sample Processor Manual 8.874.8002EN / 2019-11-11...
- Page 3 Metrohm AG CH-9100 Herisau Switzerland Phone +41 71 353 85 85 Fax +41 71 353 89 01 info@metrohm.com www.metrohm.com 874 Oven Sample Processor Manual 8.874.8002EN / 2019-11-11...
- Page 4 Technical Communication Metrohm AG CH-9100 Herisau techcom@metrohm.com 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.
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Page 5: Table Of Contents
3.11 Inserting the heating tube into the KF titration cell ..23 3.12 Attaching a sample rack ............ 26 3.13 Adjusting the guide rod ............. 27 3.14 Connecting a computer ............27 3.15 Connecting MSB devices ............ 29 3.15.1 Connecting a dosing device ........... 31 ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... - Page 6 Lift and turntable ............... 42 Oven ..................42 Gas flow ................42 Outlet heater ............... 43 Interfaces ................43 Power connection ............... 43 Ambient temperature ............43 Reference conditions ............44 Dimensions ................44 9 Accessories Index ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor...
- Page 7 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Table of figures Table of figures Figure 1 874 Oven Sample Processor front ............8 Figure 2 874 Oven Sample Processor rear ............9 Figure 3 Sample rack 6.2041.720 ..............10 Figure 4 Mounting the sample holder ............12 Figure 5 Mounting the needles ..............
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Page 9: Introduction
1 Introduction Instrument description The 874 Oven Sample Processor is used wherever the heating of a sample and/or the thermal expulsion of moisture in solids or liquids is required. In combination with a coulometric or volumetric KF titrator, the 874 Oven... -
Page 10: Instrument Components
32 mm). 1.1.3 Intended use The 874 Oven Sample Processor is designed for usage as an auxiliary device for automated sample preparation in analytical laboratories. Its main area of application is water content determination using Karl Fischer titration (coulometric or volumetric). The 874 Oven Sample Processor ena- bles the application of thermal gas extraction technology. -
Page 11: About The Documentation
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. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 12: Safety Instructions
The electrical safety when working with the instrument is ensured as part of the international standard IEC 61010. WARNING Only personnel qualified by Metrohm are authorized to carry out service work on electronic components. WARNING Never open the housing of the instrument. The instrument could be damaged by this. -
Page 13: Tubing And Capillary Connections
Personnel safety WARNING Wear protective goggles and working clothes suitable for laboratory work while operating the 874 Oven Sample Processor. It is also advisa- ble to wear gloves when caustic liquids are used or in situations where glass vessels could break. -
Page 14: Flammable Solvents And Chemicals
WARNING The 874 Oven Sample Processor is not suitable for utilization in bio- chemical, biological or medical environments in its basic equipment ver- sion. -
Page 15: Recycling And Disposal
The correct disposal of your old instrument will help to prevent negative effects on the environment and public health. More details about the disposal of your old instrument can be obtained from your local authorities, from waste disposal companies or from your local dealer. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 16: Overview Of The Instrument
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 2 Overview of the instrument Figure 1 874 Oven Sample Processor front Safety shield (6.2751.140) Conditioning position For the conditioning vessel. Sample rack (6.2041.720) Turntable For 36 sample vials (6 mL). Guide bolts Guide rod For the sample rack. -
Page 17: Figure 2 874 Oven Sample Processor Rear
18 Oven housing With PTFE covering. With ventilation slits. US B 2 Figure 2 874 Oven Sample Processor rear USB connector (USB 1 and USB 2) Controller connector USB ports (type A) for connecting a printer, For connecting a computer with installed USB hub, Titrandos, additional USB devices computer software. -
Page 18: Figure 3 Sample Rack 6.2041.720
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ MSB connector (MSB 1 to MSB 3) Power socket Metrohm Serial Bus. For connecting external dosing devices, stirrers or Remote Boxes. Mini DIN, 9-pin. Type plate Warning symbol Contains specifications concerning supply Biological hazard, (see chapter 1.3.4, page voltage, instrument type and serial number. -
Page 19: Installation
Unplug the power plug immediately if you suspect that moisture has ￭ gotten inside the instrument. Only personnel who have been issued Metrohm qualifications may ￭ perform service and repair work on electrical and electronic parts. ￭￭￭￭￭￭￭￭... -
Page 20: Mounting The Sample Holder
Connect the power cord to the power grid. ￭ Mounting the sample holder The dimensions of the supplied sample holder are optimized for the use of 6.2419.007 6-mL sample vials by Metrohm . This ensures the best possible transfer of heat between oven and sample. 6.2063.020 6.2627.010... -
Page 21: Mounting Needles
Needle holders with the dimensions required for situations calling for spe- cial sample vessels can be supplied by Metrohm upon request. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 22: Figure 5 Mounting The Needles
4 Screw the 6.1805.470 FEP tubing onto the opening of the distri- butor by hand. Screw the other end of the tube into the opening of the gas outlet on the upper side of the tower. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 23: Figure 6 Mounting The Tubing
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation 6.1805.470 Figure 6 Mounting the tubing ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 24: Mounting The Heating Tubing
50 °C as soon as the instrument is switched on. This prevents conden- sation of moisture in the tubing when it is removed from the sample and transferred to a KF titration cell with a carrier gas. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 25: Mounting The Drying Flask
If drying flask caps or filter tubes are not tightened well, the gas flow may not be precise and regular. An error message displaying an erroneous gas flow usually appears when there are leaks in the threaded connections. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 26: Figure 9 Mounting The Tubings
M6 connectors of the drying flasks. The marking Drying flask on the left-hand side of the tower dis- plays the diagram for the tubing. NOTICE Tighten the screw connections well by hand. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 27: Mounting The Dust Filter
Enclosed with the instrument is the 6.1808.040 M6/M8 thread adapter for a tubing with an M8 thread. The 6.1808.050 tubing adapter olive can additionally be put in place in order to connect a simple tubing. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 28: Figure 11 External Gas Connector
Figure 11 External gas connector WARNING If gas is fed from a pressure line or a pressure vessel, a pressure reduc- tion valve must be activated. The gas pressure must not exceed 0.3 bar of overpressure. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 29: Mounting The Safety Shield
Figure 12 Mounting the safety shield WARNING The safety shield must be installed before the 874 Oven Sample Pro- cessor is used for the first time. The device may not be operated with- out a safety shield. Proceed as follows: 1 Undo the hex screws on the sides of the tower with the accompany- ing hex key. -
Page 30: Mounting The Kf Titration Cell
The following description is provided as an example for the mounting of a coulometric KF titration cell. The necessary accessory parts are, with the exception of the 6.2013.010 clamping ring, not included in the scope of delivery of the 874 Oven Sample Processor. 6.1403.030 6.0341.100 6.0345.100... -
Page 31: Inserting The Heating Tube Into The Kf Titration Cell
3.11 Inserting the heating tube into the KF titration cell The 874 Oven Sample Processor can be used in combination with a KF coulometer or a volumetric KF titrator. The mounting of the tip of the heating tube is accomplished in different ways for the respective KF titra- tion cells. -
Page 32: Figure 13 Coulometric Kf Titration Cell
E.3010.032 O-ring. The latter you will still need. A 6.2730.020 septum stopper is enclosed with every KF titrator ￭ made by Metrohm. Disassemble this septum stopper into three parts and remove the septum. It will not be required. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 33: Figure 14 Volumetric Kf Titration Cell
The tip must not however be permitted to get in the way of the stirring bar in the KF titration cell. Afterwards give the septum stop- per its final tightening. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 34: Attaching A Sample Rack
Figure 15 Attaching rack The turntable of the 874 Oven Sample Processor must be in starting posi- tion before the sample rack can be removed or put it into place. To accomplish this, carry out the [Rack Reset] function in the manual con- trol of the control software. -
Page 35: Adjusting The Guide Rod
Cable connection and driver installation A driver installation is required in order to ensure that the 874 Oven Sam- ple Processor is recognized by the computer software. To accomplish this, you must comply with the procedures specified. The following steps are... -
Page 36: Figure 17 Connecting The Computer
The plug on the instrument end of the 6.2151.000 controller cable is protected against accidental disconnection by means of a pull-out pro- tection feature. If you wish to pull out the plug, you first need to pull back the outer plug sleeve marked with arrows. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 37: Connecting Msb Devices
In order to connect MSB devices, e.g. stirrers or dosing devices, Metrohm instruments are equipped with up to a maximum of four connectors on what is referred to as the Metrohm Serial Bus (MSB). Various kinds of peripheral devices can be connected in sequence (in series, as a "Daisy Chain") at a single MSB connector (8-pin Mini DIN socket) and con-... -
Page 38: Figure 18 Msb Connections
MSB connector. The operating unit or the control software enters the connected MSB devices into the system configuration (device manager). MSB connections can be extended with the 6.2151.010 cable. The maxi- mum connection length permitted is 15 m. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 39: Connecting A Dosing Device
685 Dosimat plus ￭ WARNING If a Dosino is connected to the 874 Oven Sample Processor, then the connection cable must be equipped with a T.2400.102 ferrite core. The ferrite core diminishes any interference voltages and thus ensures com- pliance with the strict EMC standards in accordance with the applicable technical standards, see EU declaration of conformity of the instrument. -
Page 40: Connecting A Stirrer Or Titration Stand
(socket with stirrer symbol) of the titration stand. Start the control software. ￭ US B 1 Co ntr . MS B 2 MS B 3 Figure 20 Connecting an MSB stirrer Figure 21 Connecting the rod stirrer to the titration stand ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 41: Connecting A Remote Box
Instruments that are controlled via remote lines and/or that send control signals via remote lines can be connected via the 6.2148.010 Remote Box. In addition to Metrohm, other instrument manufacturers also use similar connectors that make it possible to connect different instruments together. -
Page 42: Connecting Usb Devices
Connecting USB devices Two USB connectors (type A sockets) are available for connecting instru- ments with an USB interface. The 874 Oven Sample Processor then func- tions as USB hub (distributor). If you wish to connect more than two USB devices, you can also use an additional, commercially available USB hub. - Page 43 02 (STX or Ctrl B) to be sent as the first character. Set the "Postamble", "Record Suffix" or "Postfix Code" for the ￭ ASCII character 04 (EOT or Ctrl D) to be sent as the last character. Close programming mode. ￭ ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor...
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Page 44: Processing A Sample Series
Place an empty, sealed vial as conditioning vessel at the Cond. Pos. position on the sample rack of the 874 Oven Sample Processor. The empty blank samples are placed on Positions 1 to 3 (or 5) on the sample rack. -
Page 45: Operation And Maintenance
5 Operation and maintenance 5 Operation and maintenance General notes The 874 Oven Sample Processor requires appropriate care. Excess contam- ination of the instrument may result in malfunctions and a reduction in the service life of the sturdy mechanical and electronic components. -
Page 46: Troubleshooting
System is leaking Check all tubing connections and drying flasks not achieved. for leaks. Pressure from external gas Adjust gas pressure (max. 0.3 bar). supply either too low or too high. Pump defective Contact a service technician. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 47: Appendix
Pin assignment of remote socket and remote plug The above figure of the pin assignment of a Metrohm remote interface does not only apply for the Remote Box, but also for all Metrohm devices with 25-pin D-Sub remote connectors. ￭￭￭￭￭￭￭￭... - Page 48 Output 4 Input 5 Output 5 Input 6 Output 6 Input 7 Output 7 0 volts / GND Output 8 +5 volt Output 9 0 volts / GND Output 10 Output 11 Output 12 Output 13 ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor...
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Page 49: Stirring Rate
Rotational speed in revolutions per minutes = 125 · 8 = 1,000 r/min 2000 1500 1000 Figure 26 Rotational speed depending on the stirring rate The information on the separately connectable 802 propeller stirrer can be found in the "802 Stirrer" manual. ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 50: Technical Specifications
Dependent on temperature, supply voltage, sample amount and vessel dimensions Cooling rate Typically 9 °C/min (at 80 - 180 °C) Dependent on temperature, sample amount and vessel dimensions Gas flow Flow range 10 - 150 mL/min Under normal conditions ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 51: Outlet Heater
Three 9-pin Mini DIN sockets for connecting dosing devices (Dosino/ Dosimat), stirrers, etc. USB connectors Two USB downstream ports (type A sockets), each 500 mA, for con- necting Metrohm instruments or USB peripheral devices of other man- ufacturers. Power connection Supply voltage... -
Page 52: Reference Conditions
+25 °C (±3 °C) ture ≤ 60% Relative humidity Supply voltage 230 V Dimensions Width 0.28 m Height 0.55 m Depth 0.49 m 15.50 kg Weight (without accessories) Material (housing) Metal housing, surface-treated Oven covering: PTFE ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor... -
Page 53: Accessories
Downloading the accessories list 1 Enter https://www.metrohm.com/ into your Internet browser. 2 Enter the article number (e.g. 874) into the search field. The search result is displayed. 3 Click on the product. Detailed information regarding the product is shown on various tabs. -
Page 54: Index
Sample holder ......12 MSB ........10 Maintenance ......37 Sample vessel ......13 USB ........9 Metrohm Serial Bus MSB, see also Sample vial ....... 12 Coulometric KF titration cell ..22 "MSB" ........29 Screw connections ....18 Molecular sieve .... - Page 55 ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ Index Transfer tubing ......16 USB devices Vessel ........13 Tubing ........18 Connect ......34 ￭￭￭￭￭￭￭￭ 874 Oven Sample Processor...
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Questions and answers
Is there any specific limit for blank determination in oven technique
The blank determination in the oven technique for the Metrohm 874 requires three to five empty, tightly sealed vials as blank samples. These blank samples should be placed on Positions 1 to 3 (or 5) on the sample rack, and the sample table must include corresponding lines for blank value determination.
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@Mr. Anderson is there any pharmacopia or any specific limit for that one