Labconco 2125603 User Manual
User’sManual
TwoandSixPlace(Macro)Kjeldahl
DigestionSystems
Models
2128401
2125601
2125602
2125603
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Labconco Corporation
8811 Prospect Avenue
Kansas City, MO 64132-2696
800-821-5525, 816-333-8811
FAX 816-363-0130
E-MAIL labconco@labconco.com
HOME PAGE www.labconco.com
Please read the User’s Manual before operating the equipment.
Copyright © 2011, 2013, 2014 Labconco Corporation. All rights reserved.
The information contained in this manual and the accompanying products are copyrighted and all
rights reserved by Labconco Corporation. Labconco Corporation reserves the right to make periodic
design changes without obligation to notify any person or entity of such change.
Warranty
Labconco provides a warranty on all parts and factory workmanship. The warranty includes areas of
defective material and workmanship, provided such defect results from normal and proper use of the
equipment.
The warranty for all Labconco products will expire one year from date of installation or two years
from date of shipment from Labconco, whichever is sooner, except the following;
• Purifier® Logic® Biological Safety Cabinets and PuriCare® Lab Animal Research Stations
carry a three-year warranty from date of installation or four years from date of shipment from
Labconco, whichever is sooner.
• SteamScrubber® & FlaskScrubber® Glassware Washers carry a two-year warranty from date
of installation or three years from date of shipment from Labconco, whichever is sooner.
• Blood Drawing Chairs carry a ten year warranty.
• Carts carry a lifetime warranty.
• Glassware is not warranted from breakage when dropped or mishandled.
This limited warranty covers parts and labor, but not transportation and insurance charges. In the
event of a warranty claim, contact Labconco Corporation or the dealer who sold you the product. If
the cause is determined to be a manufacturing fault, the dealer or Labconco Corporation will repair or
replace all defective parts to restore the unit to operation. Under no circumstances shall Labconco
Corporation be liable for indirect, consequential, or special damages of any kind. This statement may
be altered by a specific published amendment. No individual has authorization to alter the provisions
of this warranty policy or its amendments. Lamps and filters are not covered by this warranty.
Damage due to corrosion or accidental breakage is not covered.
Returned or Damaged Goods
Do not return goods without the prior authorization from Labconco. Unauthorized returns will not be
accepted. If your shipment was damaged in transit, you must file a claim directly with the freight
carrier. Labconco Corporation and its dealers are not responsible for shipping damages.
The United States Interstate Commerce Commission rules require that claims be filed with the
delivery carrier within fifteen (15) days of delivery.
Limitation of Liability
The disposal and/or emission of substances used in connection with this equipment may be governed
by various federal, state, or local regulations. All users of this equipment are required to become
familiar with any regulations that apply in the user’s area concerning the dumping of waste materials
in or upon water, land, or air and to comply with such regulations. Labconco Corporation is held
harmless with respect to user’s compliance with such regulations.
Contacting Labconco Corporation
If you have questions that are not addressed in this manual, or if you need technical assistance, contact
Labconco’s Customer Service Department or Labconco’s Product Service Department at 1-800-8215525 or 1-816-333-8811, between the hours of 7:00 a.m. and 6:00 p.m., Central Standard Time.
Part # 2081401, Rev. B
ECO H982
T
AABBLLEE
T
CHAPTER 1: INTRODUCTION 1
Components Shipped 1
General Description 2
Performance 3
Component Identification 3
CHAPTER 2: INSTALLATION 6
General Installation Notes 6
Location 6
Electrical 7
Acid Fume Blower Exhaust System 8
Blower Airflow Exhaust Volume Requirement & Velocity Test 8
Digestion Rack Drip Shield 9
CHAPTER 3: NORMAL OPERATION & ROUTINE
Normal Operation Start-Up 10
Clean-Up and Cosmetic Guidelines 11
Fume Removal Manifold Suction Adjustment 11
Exhaust Systems Maintenance 11
Digestion Drip Shield 11
APPENDIX A: REPLACEMENT PARTS 12
APPENDIX B: DIMENSIONS & AIRFLOW REQUIREMENTS 13
APPENDIX C: TOTAL KJELDAHL NITROGEN METHOD 15
O
O
MAINTENANCE 10
FF
C
C
OONNTTEENNTTSS
CChhaapptteerr 11::
IInnttrroodduuccttiioonn
Components Shipped
Carefully check the contents of your Two-Place or Six-Place Kjeldahl
Digestion System for shipping damage while it is still on the shipping pallet.
Do not discard the packaging material until the contents have been checked
and the equipment has been approved for installation.
The Two-Place or Six-Place Kjeldahl Nitrogen Digestion System has been
shipped in one complete crate to minimize damage that may occur in transit.
Make sure to inspect the product thoroughly prior to installation and report
any damage that may have occurred in transit (see Warranty page for
instructions).
Product Service 1-800-522-7658
1
Chapter 1: Introduction
General Description
Labconco’s Two and Six-Place (Macro) Kjeldahl Digestion Systems are
designed to facilitate the determination of Total Nitrogen content within
materials such as feeds, grains, soils, fertilizers, plant tissue, water, organic
wastes, and food products. The expression ‘Macro’ identifies the size of
sample vessel and the sample size that can be used with this equipment.
Other Kjeldahl systems are available, which use smaller sample vessels and
require smaller sample sizes. This apparatus can be used for the digestion of
all types of nitrogen containing samples. The Two and Six-place Digestion
Systems can be used to perform a standardized Macro-Kjeldahl Nitrogen
Determination Method.
The Kjeldahl Digestion Systems are not enclosed, excess heat and personnel
safety during the digestion reaction must be considered when selecting an
installation location. The digestion process involves boiling concentrated
sulfuric acid at high temperatures. Labconco recommends placing Two-Place
Digestion System inside a chemical fume hood for safety. Labconco
recommends locating the Six-Place Digestion System in a well ventilated
room away from normal laboratory operations.
2128401 & 2125601 Two-Place and Six-Place Kjeldahl Digestion Systems
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Product Service 1-800-522-7658
Chapter 1: Introduction
Performance
The Two and Six-Place Kjeldahl Digestion Systems have been designed for
use in the determination of nitrogen (or ammonia) concentrations. By
calculation, nitrogen can be converted to protein values for products such as
plant tissues, meats and other food substances. Nitrogen determinations with
the (Macro) Digestion Systems can accommodate sample sizes up to 5
grams, due to the size of the digestion flasks. However, high levels of
organic content within a specific sample type will require smaller sample
sizes due to the vigorous digestion reaction. Detailed procedures developed
by professional laboratory organizations such as American Association of
Analytical Chemists (AOAC) and American Association of Cereal Chemists
(AACC) should always be consulted for step by step analytical procedures
when operating this equipment. For methodology precision and accuracy
please consult the specific published method for the type of sample or
substance that will be analyzed.
Component Identification
1. Electric Heaters. 600-watt heaters are used in the digestion rack of the
units. Infinite control switches regulate each of the heaters. The curved
heater elements are provided and allow for the round base of the Kjeldahl
flasks, providing faster and more evenly distributed heat. The heating
element assembly on the digestion rack can be moved closer to or away
from the acid fume removal manifold to accommodate different size
Kjeldahl flasks. The six-place systems have heaters and temperature
controllers which are wired to a common subpanel electrical box. The
two-place systems come pre-wired with a three wire cord and plug, for
easy connection to a facility electrical circuit.
2. Fume Removal Manifold. Located in back of the digestion heaters, this
manifold is manufactured from chemical resistant chlorinated polyvinyl
chloride and features heat resistant PTFE nipples designed to prevent
leakage of the hot sulfuric acid fumes created during the digestion
process. The nipple design, extends in to the flask opening, and
efficiently removes excess acids fumes during the digestion process. The
flasks are oriented at a 45 degree angle to the fume removal manifold to
promote the condensation and refluxing of the acid fumes back down into
the digestion flask. The refluxing process prevents the samples from
boiling dry during the 45+ minute digestion process.
Product Service 1-800-522-7658
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