Page 2
Please read this operating manual carefully before starting use of your new K8 / K12 / K20 / K16 / K24 / K40 digestion unit! The manual introduces you to the use of the apparatus with clear and simple guidance. For reasons of safety in use of the system, please follow all safety warnings carefully.
Safety Advice Danger of burns! The digestion tubes and the inner zone of the heating block get hot! Never touch the hot glasses or the area of the heating block around the digestion tubes with the bare hands. Danger of electric shock! Always install all cables in such a way that they cannot come into contact with the hot inner zone of the heating block; they could otherwise smoulder through! Always ensure that no liquids can come into contact with cable connections or the interior of the heating block! Always withdraw the mains plug before opening the unit! Repairs on electrical, electronic and mechanical modules of this appliance may be performed only by authorized specialist staff. Danger of injury in case of breakage of glass! Always adhere to your professional association's regulations when handling glass parts! Care is required when using and handling acids and alkalis! Danger of corrosive burns and i njuries! ! Adhere to the current Hazardous Substances Ordinance! Hazard from toxic gases! During the Kjeldahl digestion, vapours of sulfuric acid (and other toxic gases) are set free. They could harm your health and damage the apparatus and your lab equipment. Always perform digesting operations which can result in evolution of toxic or corrosive vapours using a scrubber system! Place the digester and the scrubber in a fume cupboard. Never operate the digestion unit in wet, humid or explosion‑endangered areas! Maximum air humidity = 80% Maximum temperature = 40° C...
Safety Advice ................................3 Scope of supply ................................. 5 Correct use of the device............................5 Overview of the behr K8 / K12 / K20 / K16 / K24 / K40 ................... 6 Setting up ................................... 8 Handling ..................................9 Switching the appliance on ............................ 11 Using the K8 / K12 / K20 / K16 / K24 / K40......................
Only use the appropriate type of digestion („concealed transportation damage“), please contact the tubes (round-bottom tubes). behr after-sales service immediately upon discovery of the damage. The same applies in the case of any other Please under all circumstances note and adhere to the complaints.
Page 6
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Overview of the K8 / K12 / K20 / K16 / K24 / K40 2.5 - 2.9 → 1.1 - 1.2 → Heating block : Cut-outs for suspending the exhaust collector while not in use Operating unit Sample rack...
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Setting up Position the heating block on the place provided in the fume cupboard. It should be located to the left of and adjacent to the exhauster system. Leave some room to the left and right;...
Page 10
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Removing the samples from the heating block When the digestion is completed, you should take the samples out of the heating block but leave the exhaust collector on the sample rack until the samples have cooled down.
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® The Start menu Configuring the K8 / K12 / K20 / K16 / K24 / K40 to meet your needs You can, in fact, use your K8 / K12 / K20 / K16 / K24 / K40 for analyses right now.
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Creating a temperature program You will now see for every program step a page, on which you can enter the settings for this step. The K8 / K12 / K20 / K16 / K24 / K40 can be used to Program 01/05 write up to ten different temperature programs.
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Processing samples Preheating the digester Danger of burns! The inner zone of the Switch the K8 / K12 / K20 / K16 / K24 / K40 on (mains heating block gets hot! switch on the rear panel of the unit, Page 7, 2.3). Never touch the hot glasses or the area of the heating block around the mounting °C...
Checking the Temperature All behr Kjeldahl heating blocks have a boring (2 mm ø) in the center of the aluminium block. You can insert the temperature sensor of an electronic thermometer there to check the temperatur. Check if the temperature mea- sured corresponds to the temperature display of the heating block.
Page 20
behrotest K8 / K12 / K20 / K16 / K24 / K40 ® Taking Off the PTFE Stoppers Cautiously turn the exhaust collector bottom up so that the suction nozzles are pointing upwards. From the suction vessels you want to replace, pull the ...
Make sure to treat the blank in the same way as the samples. If you have an infrared digestion device (e. g. behr InKjel) too, the easiest way to digest high-protein samples will be the infrared digestion. In an infrared digestion, the samples reach digestion temperature very quickly so the foam will collapse soon.
Switch the appliance off and on again after a few minutes. Notify the behr after-sales service if it is still not possible to switch the appliance on or if the problem occurs repeatedly.
Need help?
Do you have a question about the behrotest K8 and is the answer not in the manual?
Questions and answers