Velp Scientifica UDK 139 User Manual

10004762/B5
1
UDK 139
Semi-automatic Distillation Unit
Operating manual
Velp Scientifica thanks you for choosing the UDK 139 Semi-automatic Distillation Unit. The
UDK 139 is designed to perform nitrogen and protein content determination according to the
Kjeldahl Method (TKN) in the Food & Feed industry and has several other applications in
environmental control (nitrogen in water, soil and lubricants) and in the chemical and
pharmaceutical industry according to official AOAC, EPA, DIN e ISO procedures.
Safety warnings:
Before using the unit, please read the operating manual supplied with the apparatus
carefully.
Warning! Hot surface!
Do not dispose of this equipment as urban waste
This unit must be used for laboratory applications only.
The manufacturer declines all responsibility for any use of the unit that does not comply with
the instructions.
SAFETY PRECAUTIONS
In order to prevent the risk of electric shock, fire and personal injury when the unit is in use,
basic safety measures must always be taken including:
 Ensure that liquids do not come into contact with the electric power cable or with the
electrical parts of the instrument.
 Check that the power supply corresponds to the rating plate on the rear of the unit.
 When replacing the power cable, make sure that the new cable has the same
characteristics as the original and that it is earthed.
 Do not use the unit if it is not working correctly. In case of malfunctioning, contact your
nearest service centre.
 The personal protective equipment must be compatible with the possible risks posed by
the material being processed and the glass of the containers.
 The test tube reaches a temperature of 100°C during distillation and also during the
cooling phase. Use the pincer supplied to remove the test-tube at the end of distilling.
 The vessels and the products used during the work-cycle must be compatible with the
temperatures reached by the unit (approx. 100°C).
 For further information on the handling of the reagents see Chapter 2 “Chemicals”.
 Leave the transparent guard in place when the unit is running.
 Follow the cleaning instructions described in this manual
The safety of the instrument is no longer guaranteed in the case of improper use or if the
instructions in this manual are not followed.
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Velp Scientifica UDK 139 Specifications

General

Brand	Velp Scientifica
Model	UDK 139
Category	Distilling equipment
Language	English

Summary

Unit Overview and Setup

Parts Included

Lists all components supplied with the UDK 139 unit for initial setup.

Instrument Description

Details the main components and features of the UDK 139 distillation unit.

Assembly and Installation

Instructions for safely positioning and connecting the UDK 139 unit.

Hydraulic Connections

Explains how to connect the various inlet and outlet tubes for water and reagents.

Connection to Electric Power Supply

Details the requirements and procedure for connecting the unit to mains power.

Connection to External Devices

Describes how to connect peripherals like printers and mice.

Operation and System Management

Using the Menus

Provides a visual guide to navigating the instrument's software menus and options.

Main Menu

Outlines the primary menu structure and available submenus for operating the unit.

Analysis

Covers the steps for performing wash-down and distillation procedures.

Wash-down

Procedure for cleaning the internal parts of the splash head and condenser.

Distillation

Steps for setting up and executing a distillation analysis.

Methods

Explains how to select, customize, and manage analytical methods.

Set-up

Configuration options for date, time, language, frequency, and display settings.

System

Access to system diagnostics, calibration, maintenance, and service functions.

Maintenance

Guidance on routine and extraordinary maintenance tasks for the unit.

Calibration

Procedure for calibrating the flow rate of reagent pumps.

Service

Information on software upgrades and advanced service options.

Safety, Controls, and Work Cycle

Operating Controls

Details of safety devices, warning signals, and operating parameters.

Safety Devices

Explains the function of test tube, safety guard, and safety lever interlocks.

Reserves and Overfilling

Warnings and procedures for low reagent levels and overflow conditions.

Warning Signals and Messages

Identifies common warning signals and error messages during operation.

Work Cycle

Step-by-step procedures for performing standard and Devarda’s analyses.

Analysis

Steps for performing a standard analysis using the UDK 139 unit.

Devarda’s Analysis

Specific procedure for performing Devarda's analysis on the unit.

End-of-Work Operations

Steps to follow for safely shutting down the unit after use.

Maintenance and Technical Information

Routine Maintenance

Daily maintenance tasks, including wash-down and cleaning of parts.

Extraordinary Maintenance

Periodic and as-needed maintenance like filter cleaning and fuse replacement.

Periodic Maintenance

Cleaning NaOH tubes and filters, replacing test tube connections every 500/1000 analyses.

Operations to be Performed Only When Necessary

Procedures for replacing fuses, cleaning the condenser, and internal splash head.

Expedients for Transport

Instructions for preparing the unit for safe transportation, including draining tubes.

Technical Features

Specifications, performances, and consumption data of the UDK 139.

Wiring Diagram

Electrical schematic illustrating the internal wiring of the unit.

Hydraulic Scheme

Diagram showing the fluidic connections and pathways within the unit.

Analytical Methods and Kjeldahl Procedure

General Description of Kjeldahl's Method

Overview of the Kjeldahl method for organic nitrogen determination.

AOAC, Method 960.52

Specific procedure for microchemical determination of nitrogen using the Micro-Kjeldahl method.

Analytical Procedure: Typical Scheme

Step-by-step flow chart for typical organic nitrogen analysis.

Analytical Methods

Detailed procedures for various Kjeldahl methods applied to different sample types.

Kjeldahl Method for Milk

Procedure for determining protein content in milk and derived products.

Kjeldahl Method for Wheat

Procedure for determining protein content in wheat.

Kjeldahl Method for Water

Procedure for determining total nitrogen content in water samples.

Method for Alcohol Strength in Wines

Procedure for determining alcohol content in wines, musts, and spirits.

Method for Volatile Acidity of Tomato Paste

Procedure for measuring volatile acids in tomato paste distillate.

Method for Nitric Nitrogen on Water

Procedure for determining nitric nitrogen in water after reduction to ammonia.

Method for Volatile Acids Content in Digesting Sludge

Method to control anaerobic digester efficiency by volatile acids.