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Summary of Contents for Buchi K-437
- Page 1 Operation Manual Digest System K�437 11593500...
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Page 3: Table Of Contents
Proper use K-437 ........6... - Page 4 Kjeldahl digestion process....... 19 Operating the K-437 ....... . . 19 Service menu .
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Page 5: About This Manual
English, German, French, Italian and Spanish • Digest Automat K-432/438, Operation Manual numbers 96765 - 96769 • SpeedDigester K-425/K-436, Operation Manual numbers 11593346 - 11593350 • SpeedDigester K-439, Operation Manual numbers 11593351 - 11593355 • Scrubber K-437 Operation Manual, Version A... -
Page 6: Safety
2 .3 Proper use COD Accessory with K-437 The instrument has been designed and built for laboratories. It serves for the heating of samples for a following COD (chemical oxygen demand) determination. -
Page 7: Warning Notices Used In This Manual
• Beware of damaged or cracked glass parts. WARNING Potentially hot surfaces during operation, especially at the glass parts or due to hot sulphuric acid. • Always be aware of the risk of being burned. K-437 Operation Manual, Version A... -
Page 8: Other Hazards
• following a long period of storage under unfavorable conditions, • following transport under difficult conditions. Always wear personal protective equipment such as protective eye goggles, protective clothing and gloves when working with the instrument. K-437 Operation Manual, Version A... -
Page 9: General Safety Rules
Modifications to the instrument are only permitted after prior consultation with and with the written approval of the manufacturer. Modifications and upgrades shall only be carried out by an authorized BUCHI technical engineer. The manufacturer will decline any claim resulting from unauthorized modifi- cations. -
Page 10: Technical Data
3 .1 Scope of delivery Check the scope of delivery according to the order number. NOTE For detailed information on the listed products, see www.buchi.com or contact your local dealer. 3 .1 .1 Standard instrument K-437 Table 3-1: Standard instrument... -
Page 11: Standard Instrument Cod Accessory
Table 3-2: Versions of COD Accessories Product Order number COD Accessory for Digestion Sytem 43960 K-437 or Digest Automat K-438 Digest System K-437 with COD Acces- 43963 sories 3 .1 .3 Standard accessories K-437 Table 3-3: Standard accessories K-437 Product... -
Page 12: Standard Accessories Cod Accessory
Preparation block COD 43953 g Digestion tube holder COD 43955 3 .1 .5 Optional accessories K-437 Table 3-5: Optional accessories K-437 Product Order number Water jet pump made of plastic 02913 PTFE seal for suction tube, set of 20... -
Page 13: Technical Data Overview
± 2 °C at temperatures < 200 °C Heating up period Up to around 150 °C within 10 minutes 3 .3 Materials used Table 3-8: Materials used for the K-437 Component Material designation Material code Housing Sheet steel DC01 + EVZ... -
Page 14: Description Of Function
This chapter explains the basic principle of the instrument, shows how it is structured and gives a functional description of the assemblies. 4 .1 Functional principle of the Digest System The Digest System K-437 is suitable for digestion processes with concentrated boiling sulphuric acid. The digestion parameters are listed in the BUCHI application notes. -
Page 15: Functional Principle Of The Cod Accessory
COD determina- tion. The digestion is followed by colorimetric determination or photometric determination. Application parameters are listed in official methods or in the BUCHI Application Note “COD determination”. Fig. 4.2: Overview of the COD Accessory 4 .3... -
Page 16: Putting Into Operation
ATTENTION If your are working with a Scrubber, place it on the left side of the K-437. The Scrubber ventilation is located on the left side. In case the Digest System is placed on the left side, cool air will hit the dige- stion sample and cool it down, so that no digestion can take place. -
Page 17: Hose Connections
Make sure that the suction output is sufficient. ATTENTION If the Scrubber is used without condensation step, the condensation that accrues must be caught by means of a Woulff bottle between the Digest System and the Scrubber. K-437 Operation Manual, Version A... -
Page 18: Operation
The digestion time depends on the substance to be digested. Information on this can be found in the BUCHI application notes. If no BUCHI application is available, the digestion time must be ascertained by means of experiments. (Once the solution has become clear, continue to boil the solution for about 30 minutes.) Once the samples have cooled off, the digestion tube can be connected directly to a... -
Page 19: Kjeldahl Digestion Process
The inputs can be changed by pressing the TEMP or TIME buttons. Enter the required temperature or time by pressing the arrow buttons and confirm by pressing ENTER. If “0” is entered for the time, the timer will be switched off and the operator must observe the digestion time. K-437 Operation Manual, Version A... - Page 20 If the Scrubber is connected to the K-437, it is started as soon as the START button is pressed. If this is not the case, the water jet pump must be started manually.
- Page 21 The digestion process is interrupted if a power failure occurs. The heating is switched off auto- ERR1 POWER matically. Switching off the K-437 Press the main switch. The light in the switch will go off. K-437 Operation Manual, Version A...
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Page 22: Service Menu
Temperature calibration If the actual temperature measured is different from the specified temperature, use the arrow OFFSET ACTUAL buttons to correct it. K-437 Operation Manual, Version A... -
Page 23: Maintenance
After the glass parts have been cleaned and fully dried, check each part visually for cracks, scratches and for any parts or sections that might have splintered off. Take out and replace any damaged glass parts. K-437 Operation Manual, Version A... -
Page 24: Digestion Tubes
Seals are subject to wear and tear, thus you should check them regularly and replace them, if neces- sary. 7 .5 Exhaust unit The exhaust unit can be cleaned under running water or in the laboratory washing instrument. K-437 Operation Manual, Version A... -
Page 25: Power Supply Fuse
Addresses of official BUCHI customer service offices are given on the BUCHI website under: www.buchi.com. If malfunctions occur on your instrument or you have technical questions or applica- tion problems, contact one of these offices. -
Page 26: Troubleshooting
“Corrective measure”. The elimination of more complicated malfunctions or errors is usually performed by a BUCHI technical engineer who has access to the official service manuals. In this case, please refer to your local BUCHI customer service agent. -
Page 27: Shutdown, Storage, Transport And Disposal
Remove all dangerous substances from the instrument and clean it thoroughly. Store and transport the instrument in its original packaging. WARNING The K-437 weighs 35 kg. For this reason, manual handling of the instrument should always be done by at least two people. 9 .2... -
Page 28: Spare Parts
Spare parts This chapter lists spare parts, accessories, and options including their ordering information. Order the spare parts from BUCHI. Always state the product designation and the part number when ordering spare parts. Use only genuine BUCHI consumables and genuine spare parts for maintenance and repair to assure good system performance and reliability. - Page 29 10 Spare parts Table 10-1: Spare parts K-437 and general (cont.) Position Product Order number 11057983 Antifoam 11057984 Copper Micro 11057985 K-437 Operation Manual, Version A...
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Page 30: Declarations And Requirements
L’utilisation de cet appareil dans les zones résidentielles peut causer des interférences néfastes, auquel cas l’exploitant sera amené à prendre les dispositions utiles pour palier aux interférences à ses propres frais. K-437 Operation Manual, Version A... -
Page 31: Declaration Of Conformity
11 Declarations and requirements 11 .2 Declaration of conformity K-437 Operation Manual, Version A... - Page 34 BÜCHI Labortechnik AG CH-9230 Flawil 1 / Switzerland T +41 71 394 63 63 F +41 71 394 65 65 www .buchi .com Quality in your hands...
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