Buchi SpeedDigester K-425 - User Manual

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K-425 / K-436 SpeedDigester

Operation Manual

11593346B en

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Questions and Answers

B
Brandon HarrisAug 3, 2025
Why is my Buchi Laboratory Equipment not heating?
- D
  David FoleyAug 3, 2025
  If your Buchi Laboratory Equipment isn't heating, several factors could be at play. First, ensure the mains plug is properly inserted and undamaged, and the power switch is on. Confirm the mains switch lights up green when powered. Check that the thermostat isn't set to 'OFF'; choose a heating level between 1 and 10. If these steps don't resolve the issue, there might be a defective thermostat, heating element, or an activated overtemperature safety switch. In such cases, contact Buchi customer service for assistance.
S
scottstoneAug 18, 2025
What to do if fumes are escaping from my Buchi SpeedDigester?
- Y
  yfarleyAug 18, 2025
  If fumes are escaping from your Buchi SpeedDigester, immediately stop the digestion process. Check and clean all parts, ensuring they are correctly placed into the fume hood. Inspect the scrubber or water jet pump to ensure they are switched on and functioning correctly. Refer to their manuals for instructions on increasing suction power. Also, check for defective or clogged sealing, glassware, or tubes.

Summary

Safety

User Qualification and Usage Guidelines

Defines user qualifications and outlines proper/improper instrument use.

Safety Warnings and Symbols

Explains signal words, symbols, and their meanings for hazard communication.

Product Safety Overview

Covers general hazards, product safety, and related warnings.

PPE and Built-in Safety Features

Details PPE requirements and the instrument's integrated safety features.

General Safety Rules

Outlines operator responsibilities and general safety practices.

Technical Data

Scope of Application and Delivery

Details the instrument's application scope and standard delivery contents.

Available System Configurations

Lists different configurations and order numbers for the K-425/K-436.

Accessories for Sample Tubes

Details accessories for 300 ml, 500 ml, and 3rd party sample tubes.

Instrument Specifications by Model

Specifies technical data for K-425 and K-436 models.

Materials Used

Lists materials used in the construction of the instrument.

Description of Function

Functional Principle of Operation

Explains the basic working principle of the SpeedDigester.

About this manual

Putting into Operation

Installation Site Requirements

Details requirements for placing the instrument in a fume hood.

System Fixation and Electrical Connections

Describes instrument fixation and safe electrical connection procedures.

Operation

Operating Controls and Housing Overview

Identifies and describes the controls and parts of the instrument.

Preparing for Digestion Processes

Guides on preparing the instrument, modules, and sample tubes.

Performing Digestion: Kjeldahl and Peroxide

Steps for preparing and performing Kjeldahl and peroxide digestion.

Finishing and Cooling Down Procedures

Instructions on safely cooling down and finishing the digestion process.

Maintenance and Repairs

Customer Service and Contact

Information on contacting customer service for support and repairs.

General Cleaning and Safety

Provides guidelines for safe cleaning of the instrument and its components.

Handling Glassware Issues

Procedures for cleaning up broken glassware and handling liquid ingress.

Glassware and Sealing System Care

Guidance on maintaining glass parts and the sealing system.

Troubleshooting

Common Malfunctions and Remedies

Lists common malfunctions, their causes, and suggested remedies.

Device Fuses: Checking and Replacement

Instructions on how to check and replace device fuses safely.

Shutdown, Storage, Transport and Disposal

Storage and Transport Guidelines

Instructions for safely shutting down, packing, and transporting the instrument.

Instrument Disposal Procedures

Provides guidelines for environmentally friendly disposal of the instrument and its components.

Spare Parts and Accessories

Ordering Spare Parts and Consumables

Lists order numbers for spare parts, optional accessories, and consumables.

Declarations and Requirements

FCC Compliance for North America

Details FCC compliance information for the device in North America.

Buchi SpeedDigester K-425 Specifications

General

Model	K-425
Material	Stainless steel
Power Consumption	1200 W
Power Supply	230 V, 50/60 Hz
Applications	Sample digestion
Number of samples	6
Temperature control	Yes