Related Manuals for BEHR DG 2+2
Summary of Contents for BEHR DG 2+2
- Page 1 DG 2+2 / DG 6 Defattening Unit for the behrotest CF 2+2 / CF 6 ® For 4 or 6 Samples, respectively User's Manual...
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Page 2: Safety Advice
Safety advice Danger of electric shock! Make sure that no liquids get into the cable connections or the inside of the equipment. There are no components inside the appliance which you need to operate. Repairs to electrical equipment must be carried out only by trained specialists. Unplug the mains plug before opening the appliance. Glass can break and cause injury! In working with glass components, observe all appropriate safety precautions. Be careful in working with corrosive substances! Follow the safety guidance in the pertinent Safety Data Sheets. Caution: acetone and petroleum ether are inflammable! Perform all procedures working with organic solvents in the optional defattening unit DG 2+2 / DG 6, not in the DG 2+2 / DG 6. Empty the waste containers regularly; define whether the contents are to be recycled or to be disposed of. © behr Labor-Technik GmbH... -
Page 3: Scope Of Supply
Scope of supply Please check the contents of the pack for completeness and freedom from damage immediately upon receipt. Claims resulting from damage during transportation which is externally apparent must be lodged immediately with the carrier (i.e., the post/mail service, the railway administration, the freight organization, etc.) - see the label on the packaging. In case of damage which is not apparent from outside („concealed transportation damage“), please contact the behr after-sales service immediately upon discovery of the damage. The same applies in the case of any other complaints. Address: behr Labor-Technik GmbH Spangerstrasse 8 D-40599 Düsseldorf, Germany Telephone: (+49 211) 7 48 47 17 Telefax: (+49 211) 7 48 47 48 E-mail: info@behr-labor.com. Please check the contents against the following list. Parts list Defattening unit Crucible rack for docking to the DG 2+2 / DG 6 Multi-Crucible Snapperr to simultaneously take the 4 or 6 crucibles out or insert them 4 or 6 filter crucibles, respectively, ... -
Page 4: Setting Up And Connecting
Inserting the crucibles in the multi-crucible snapper On delivery, the filter crucibles and the heat shield come packed separately; insert them in the device now: Insert the crucibles in the crucible rack. Push the multi-crucible snapper on the crucibles. Inserting the crucibles in the device Insert the crucibles in the crucible rack ... Release the lock lever by pressing it down a bit and pulling the locking grip towards yourself with your thumb. Let the lever come up to the end position; release the locking grip as soon as the lever is out of the lock position. Insert the crucibles in the device. Push the lock lever down until it engages.Now the crucibles are locked. Later on, you won't ever grasp the crucibles one by one but insert them in the device using the multi- crucible snapper, and get them out or transfer them ... and press the multi-crucible to or from the optional defattening unit. snapper on the crucibles © behr Labor-Technik GmbH... - Page 5 The Defattening Unit The determination procedure of crude fibre has some steps operating with volatile organic solvents. Before starting the digestion itself, the sample is treated with petroleum ether to remove fat. After the acid digestion step it can be necessary - depending of the nature of the sample - to remove another fraction of fat; in this case the wet sample must be treated with acetone first to remove water. And at the very end, the sample is washed with acetone to make drying easier. These procedure steps must not be carried out in the DG 2+2 / DG 6 digestion unit. For these steps there is the optional defattening unit DG 2+2 / DG 6. The defattening unit has no condensers and no IR radiator or any other kind of heating, but, instead, it has two separate suction pumps so you can collect acetone and petroleum ether separately and decide if and how they are to be recycled. The procedure of locking and unlocking the crucibles is the same for the optional defattening unit as for the IR digestion unit. behrotest DG 2+2 / DG 6 ®...
- Page 6 For samples rich in fat: Defattening If the sample material has more than 10% fat, the samples need to be defattened. Caution: acetone and petroleum ether are inflammable! Perform all proce- dures working with organic solvents in the optional defattening unit DG 2+2 / DG 6, not in the DG 2+2 / DG 6. Insert the crucibles containing the samples into the defattening unit DG 2+2 / DG 6. Turn all valves in "Closed" position. Pour 0 ml petroleum ether 40 - 60 °C into each crucible. With the right switch, switch the petroleum- ether suction pump on. Now turn the first valve in "Petroleum" position and have the first sample sucked dry. Turn this valve back to "Closed", and have the second and all other sample sucked dry, one after the other, in the same way. Repeat the defattening procedure twice more: for each step, pour 0 ml petroleum ether in the crucibles, turn the valves, one by one, to "Petroleum" position, have the sample sucked dry and close the valve again. © behr Labor-Technik GmbH...
- Page 7 Decalcifying If the material contains much carbonate (more than 50 g/kg measured as calcium carbonate), it must be decalcified. The decalcification step can be performed in the DG 2+2 / DG 6 as well. The hydrochloric acid is miscible with acetone, so suck it with the acetone pump into the acetone container. If it has not yet been done, insert the crucibles containing the samples in the defattening unit DG 2+2 / DG 6. Turn all valves in "Closed" position.. Pour 0 ml of 0.5-molar hydrochloric acid into each crucible and let it work for one minute. Switch the acetone suction pump on with the left switch. Now turn, one after another, each of the valves into "Acetone" position and have the content of the crucible sucked dry. Then turn the valve back to "Closed" before opening the next one. Repeat the procedure twice more with each sample. behrotest DG 2+2 / DG 6 ®...
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Page 8: Maintenance And Care
Loosen the upper knurled nut and lift the retai- ning pin upwards out of the groove. Pull the cover of the pump head off. You need to tilt it a little, then pull it downwards. Replace the tubing (complete with end nipples) as required. Now the pump hose and rotor are lying open before your eyes. Check if the pump hose is still intact or if you need to replace it. In order to change the pump hose: Pull the connector pieces of the old hose out of the cut-outs of the pump housing (see detail photo). Pull the hoses: the discharge hose and the hose connecting the pump to the filters, off the connector pieces of the pump. The new pump hose comes assembled ready-for- use with the connector pieces. Put the connecting hose leading to the filters to The flat spot the suction-sided connector piece of the new matches to pump hose. the gap in the housing Connect the discharge hose to the pressure- sided connector piece. Lay the new pump hose around the pump rotor. Close the housing again, turn the screw upwards again and tighten it a little. © behr Labor-Technik GmbH... - Page 9 Changing the pump head If need be, you can change the pump head too (after taking off the pump hose). Unscrew the two knurled nuts on the left and right side of the pump head..and pull off the entire pump head (the red chas- sis) towards yourself. To change the pump head, undo these nuts.. and pull the pump head (with the red The discharge hoses leading from the peristaltic chassis) off pumps need rarely ever be replaced; but check if the hose connections are still tight. Sealing rings: crucible mountings and funnels The flat sealing ring in the DG 2+2 / DG 6 crucible receptscle is the same one as in the Crude Fiber device. Flat sealing rings under the charging funnels... ...and in the crucible Check if any filter aid has got jammed on the receptacles sealing ring, and if need be change it. There is a flat sealing ring of the same kind below ...
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Page 10: Spare Parts And Accessories
B00491177 Sensor for monitoring the maximum fill level, PP B00210222 Container 20 l, opening 49 mm inner ø B0017700 Flat sealing rings for DG 2+2 / DG 6, 10 pcs. B00521028 Technical Data Dimensions W x H x D approx. mm DG 2+2 DG 6 - Digestion unit DG 2+2 / DG 6 600 x 670 x 570 750 x 670 x 570 - De-fattening unit 650 x 00 x 570 800 x 00 x 570 Weight approx. kg - De-fattening unit Nominal voltage 20 V ~ / 50 Hz Power consumption max. VA - De-fattening unit Customer Service behr Labor-Technik GmbH Phone: (+49 211) 7 48 47 17 Spangerstraße 8 Telefax: (+49 211) 7 48 47 48 D-40599 Düsseldorf eMail: info@behr-labor.com Internet: http://www.behr-labor.com © behr Labor-Technik GmbH...
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