Operation Manual
SpeedDigester
K�4 2 5 / K �436
11593346 en
Table of contents
Table of contents
1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 User qualification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Improper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Safety warnings and safety signs used in this manual . . . . . . . . . . . . . . . . . . 7
2.5 Product safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5.1 General hazards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.5.2 Warning labels on housing and assemblies . . . . . . . . . . . . . . . . . . . . . . 10
2.5.3 Personal protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5.4 Built-in safety elements and measures . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6 General safety rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of application and delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1.1 Available system configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1.2 Accessories for 300 ml sample tubes (for standard applications) . . . . . . . . . . . 14
3.1.3 Accessories for 500 ml sample tubes (for large sample volumes / at low nitrogen level) 15
3.1.4 Accessories for 3rd party production, 250 ml sample tubes . . . . . . . . . . . . . . 15
3.2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.1 SpeedDigester K-425 / 110 – 120 V version . . . . . . . . . . . . . . . . . . . . . . 16
3.2.2 SpeedDigester K-425 / 220 – 240 V version . . . . . . . . . . . . . . . . . . . . . . 17
3.2.3 SpeedDigester K-436 / 220 – 240 V version . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Materials used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Description of function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 Functional principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5 Putting into operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Installation site. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 System fixation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Operating controls and housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.1 SpeedDigester K-425 — front side . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.2 SpeedDigester K-425 — rear side. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1.3 SpeedDigester K-436 — front side . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.4 SpeedDigester K-436 — rear side. . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Preparing of SpeedDigester, suction module(s) and sample tubes. . . . . . . . . . . 27
6.2.1 Kjeldahl digestion —preparing sample tubes. . . . . . . . . . . . . . . . . . . . . . 28
6.2.2 Peroxide digestion —preparing sample tubes . . . . . . . . . . . . . . . . . . . . . 29
6.2.3 Installing a suction module and sample tubes (300 ml). . . . . . . . . . . . . . . . . 29
6.2.4 Installing 500 ml sample tubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2.5 Starting up the SpeedDigester . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.3 Performing a Kjeldahl digestion process. . . . . . . . . . . . . . . . . . . . . . . . 34
6.3.1 Preparational steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3 K-425 / K-436 Operation Manual, Version A
Table of contents
6.3.2 Starting a digestion process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.4 Performing a peroxide digestion process . . . . . . . . . . . . . . . . . . . . . . . 35
6.4.1 Preparational steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.4.2 Starting a digestion process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.5 Finishing a digestion process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.6 Optional 'Stand with drip tray' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7 Maintenance and repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1 Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
7.2 General condition and cleaning instructions . . . . . . . . . . . . . . . . . . . . . . 42
7.2.1 Breakage of glassware inside a housing chamber . . . . . . . . . . . . . . . . . . . 43
7.2.2 Liquid ingress into the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.3 Glass component conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.3.1 Sample tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.4 Sealing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.5 Rack system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.5.1 300 ml sample tube support spring . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.5.2 500 ml sample tube support spring . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.1 Malfunctions and their remedy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
8.2 Device fuses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9 Shutdown, storage, transport and disposal . . . . . . . . . . . . . . . . . . . . . . . . 49
9.1 Storage and transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
9.2 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.2.1 Thermostat(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
10 Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
10.1 Spare parts, optional accessories and consumables . . . . . . . . . . . . . . . . . 52
11 Declarations and requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
11.1 FCC requirements (for USA and Canada) . . . . . . . . . . . . . . . . . . . . . . . 55
11.2 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
4
K-425 / K-436 Operation Manual, Version A
1 About this manual
This manual describes the SpeedDigester K-425 / K-436 and provides all information required for its
safe operation and to maintain it in good working order.
It is addressed to laboratory personnel and operators in particular.
Read this manual carefully before installing and running your system and note the safety precautions
in chapter 2 in particular. Store the manual in the immediate vicinity of the instrument, so that it can be
consulted at any time.
No technical modifications may be made to the instrument without the prior written agreement of
Buchi. Unauthorized modifications may affect the system safety or result in accidents. Technical data
are subject to change without notice.
Note
The symbols pertaining to safety (WARNINGS and ATTENTIONS) are explained in chapter 2.
1 About this manual
This manual is copyright. Information from it may not be reproduced, distributed or used for competitive purposes, nor made available to third parties. The manufacture of any component with the aid of
this manual without prior written agreement is also prohibited.
The English manual is the original language version and serves as basis for all translations into
other languages. If you need another language version of this manual, you can download available
versions at www.buchi.com.
5 K-425 / K-436 Operation Manual, Version A
2 Safety
This chapter introduces the safety concept of the instrument and contains general rules of behavior
and warnings from direct and indirect hazards concerning the use of the product.
For the users safety, all safety instructions and safety messages in the individual chapters shall
be strictly observed and followed. Therefore, the manual must always be available to all persons
performing any tasks described herein.
2.1 User qualification
The instrument may only be used by laboratory personnel and other persons who on account of
training and professional experience know the potential dangers that can develop when operating the
instrument.
Untrained personnel, or persons who are currently being trained, require careful supervision by a
qualified person. This Operation Manual serves as a basis for training.
2 Safety
2.2 Proper use
The SpeedDigester K-425 / K-436 has been designed and built for laboratory use only. Its intended
use is to allow digestion of samples with concentrated acids or peroxides by heating up the probe.
A suction unit (e.g. Scrubber or water jet pump) has to be connected to the suction module to safely
withdraw fumes which will emerge during digestion. In any case, all exhausts and fumes leaving the
system or assemblies such as Scrubber or water jet pump have to be removed instantly inside a
fume hood. This is mandatory to remove all possibly hazardous substances (e.g. acid fumes) from the
working area. The ventilation system of the fume hood has to be equipped with safety measures such
as outlet filters to avoid contamination of the environment.
When the SpeedDigester K-425 / K-436 is used in combination with other instruments (e.g. Scrubber
and fume hood) all related manuals are to be fully observed.
2.3 Improper use
Applications not mentioned in section 2.2 are considered to be improper. Applications which do not
comply with the technical data (see section 3 of this manual) are also considered to be improper.
The operator bears the sole risk for any damages or hazards caused by improper use!
The following uses are expressly forbidden:
Digestion operations outside an active fume hood.•
Digestion of samples (e.g. food and feed) in nitrosulfuric acids which can produce explosive nitro •
compounds.
Digestion of sample material of unknown composition in nitrosulfuric acids.•
Use of samples which can explode or ignite due to shocks, friction, heat or sparks.•
Installation or use of the instrument in rooms, which require ex-protected instruments.•
Use of glassware which is not specified in section 2.5.4.•
6 K-425 / K-436 Operation Manual, Version A
2.4 Safety warnings and safety signs used in this manual
!
DANGER, WARNING, CAUTION and NOTICE are standardized signal words for identifying levels of
hazard seriousness of risks related to personal injury and property damage. All signal words, which are
related to personal injury are accompanied by the general safety sign.
For your safety it is important to read and fully understand the table below with the different signal
words and their definitions!
Sign Signal word Definition Risk level
DANGER
Indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
2 Safety
★★★★
WARNING
CAUTION
NOTICE
no
Supplementary safety information symbols may be placed in a rectangular panel on the left to the
signal word and the supplementary text (see below example).
Space for
supplementary
safety
information
symbols.
Table of supplementary safety information symbols
The reference list below incorporates all safety information symbols used in this manual and their
meaning.
Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
Indicates a hazardous situation which, if not avoided, may result
in minor or moderate injury.
Indicates possible property damage, but no
practices related to personal injury.
SIGNAL WORD
Supplementary text, describing the kind and level of hazard / risk seriousness.
List of measures to avoid the herein described, hazard or hazardous situation.•
...•
...•
★★★☆
★★☆☆
★☆☆☆
(property damage only)
Symbol Meaning
General warning
Electrical hazard
Heavy weight, avoid overexertion
Explosive gases, explosive environment
7 K-425 / K-436 Operation Manual, Version A
Symbol Meaning
Explosive material
Fire hazard
Harmful to life-forms
Hot item, hot surface
Device damage
2 Safety
Inhalation of substances
Chemical burns by corrosives
Fragile components
Wear laboratory coat
Wear protective goggles
Wear protective gloves
Heavy weight, lifting requires more than one person
8 K-425 / K-436 Operation Manual, Version A
Additional user information
!
!
Paragraphs starting with Note transport helpful information for working with the device / software or its
supplementaries. Notes are not related to any kind of hazard or damage (see following example).
Note
Useful tips for the easy operation of the instrument / software.
2.5 Product safety
The SpeedDigester K-425 / K-436 has been designed and built in accordance with current state-ofthe-art technology. Safety warnings in this manual (as described in section 2.4) serve to make the user
alert to and avoid hazardous situations emanating from residual dangers by giving appropriate counter
measures.
However, risks to users, property and the environment can arise when the instrument is damaged,
used carelessly or improperly.
2 Safety
2.5.1 General hazards
The following safety messages show hazards of general kind which may occur when handling the
instrument. The user shall observe all listed counter measures in order to achieve and maintain the
lowest possible level of hazard.
Additional warning messages can be found whenever actions and situations described in this manual
are related to situational hazards.
DANGER
Death or serious injuries by use in explosive environments.
Do not store or operate the instrument in explosive environments•
Do not store chemicals in the vicinity of the device•
Operate the device in a fume hood with sufficient ventilation to directly withdraw fumes•
WARNING
Death or serious burns by flammable vapors.
Remove all sources of flammable vapors•
Do not store flammable chemicals in the vicinity of the device•
9 K-425 / K-436 Operation Manual, Version A
!
WARNING
!
!
Risk of death or serious chemical burns by hot acid or peroxide fumes.
Do not operate the system with faulty parts•
Check instrument setup for proper sealing before use•
Do not inhale process fumes•
Operate the instrument inside an active fume hood•
Do not move the instrument or parts of it during digestion•
CAUTION
Risk of minor or moderate cuts by sharp edges.
Do not touch defective or broken glassware with bare hands•
Do not touch thin metal edges•
2 Safety
CAUTION
Risk of burns by hot machine parts and glassware.
Do not touch hot parts or surfaces•
Let the system and inserted glassware cool down safely•
Do not move the instrument or parts of it when hot•
Risk of instrument damage by liquids or mechanical shocks.
2.5.2 Warning labels on housing and assemblies
The following warning sticker(s) can be found on the housing or assemblies of the SpeedDigester:
Symbol Meaning Location
NOTICE
Do not spill liquids over the instrument or its components•
Do not move the instrument when it is loaded with sample liquid•
Do not drop the instrument or its components•
Keep external vibrations away from the instrument•
Safely attach the instrument to the bench in earthquake prone regions•
Do not operate the instrument without the protection cover installed at the front•
Hot item, hot surface
Do NOT put rack into side cooling position Label on 500 ml racks
10 K-425 / K-436 Operation Manual, Version A
Sticker / label, located on top of the housing and
at the racks
2.5.3 Personal protective equipment
!
Always wear personal protective equipment such as protective eye goggles, protective clothing and
gloves. The personal protective equipment must meet all requirements of the supplementary data
sheets for the chemicals used.
WARNING
Serious chemical burns by corrosives.
Observe supplementary data sheets of all used chemicals.•
Handle corrosives in well ventilated environments only.•
Always wear protective goggles.•
Always wear protective gloves.•
Always wear protective clothes.•
Do not use damaged glassware.•
2 Safety
2.5.4 Built-in safety elements and measures
Buchi glassware design
All original Buchi digestion glassparts are made of high temperature and chemical resistant borosili-•
cate glass.
Acid fumes generated during digestion accumulate in the suction module•
The fumes must be safely withdrawn from the suction module via one or more hoses to a Scrubber •
(e.g. Scrubber B-414) or via water jet pump into a sink or sufficient suction flow.
3rd party glassware
The quality of the material is an essential part of the safety concept of the SpeedDigester
K-425 / K-436. For the special rack (order no. 11055440), the following qualified vendors offer sample
tubes of sufficient quality grade to withstand the temperatures and the aggressive chemical digestion
agents:
Qualified vendor Tested sample tube(s)
Gerhardt 250 ml / 6100
Velp ø 42×300 mm / A00000144
Foss 250 ml / 10014278
Heater
Each heating chamber is equipped with a safety overtemperature switch. In case of an emergency the
switch cuts off the power of the corresponding chamber and the 'Heating indicator' light.
11 K-425 / K-436 Operation Manual, Version A
2.6 General safety rules
Responsibility of the operator
The head of the laboratory is responsible for training his/her personnel.
The operator shall inform the manufacturer without delay of any safety-related incidents which might
occur during operation of the instrument or its accessories. Legal regulations, such as local, state and
federal laws applying to the instrument or its accessories must be strictly followed.
Duty of maintenance and care
The operator is responsible for the proper condition of instrument. This includes maintenance, service
and repair jobs that are performed and on schedule by authorized personnel only.
Spare parts to be used
Use only genuine consumables and spare parts for maintenance to assure good system performance,
reliability and safety. Any modifications of spare parts or assemblies are only allowed with the prior
written permission of the manufacturer.
Modifications
Modifications to the instrument are only permitted after prior consultation 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 modifications.
2 Safety
12 K-425 / K-436 Operation Manual, Version A
3 Technical data
This chapter introduces the reader to the SpeedDigester K-425 / K-436 and its specifications. It
contains the scope of delivery, technical data, requirements and performance data.
3.1 Scope of application and delivery
All system configurations come with a limited set of accessories as a starter kit. Within a system family,
additionally available accessories (see section 3.1.2 and the following) can be used to easily reconfigure your system to every configuration listed in section 3.1.1.
Parts that are required to change a system configuration:
Rack•
Suction module•
Insulation plate (fireclay insert)•
Sample tubes•
3 Technical data
The scope of delivery depends on the ordered system configuration and can be checked according to
the individual delivery note and the listed order numbers.
Note
For additional information about the listed products, see www.buchi.com or contact your local dealer.
3.1.1 Available system configurations
SpeedDigester K- 425
Configuration
order number
110 – 120 V 220 – 240 V 5 6 250 ml 300 ml 500 ml Standard
1154251500 1154252500
1154251100 1154252100
1154251200 1154252200
1154251300 1154252300
Sample
positions
Sample tube sizes Suction modules
Condensate
trap
• • •
• • •
• • •
• • •
H
2O2
Module for
3rd party
tubes
1154251400 1154252400
* Third party sample tubes require special accessories such as the BUCHI “Module for 3rd party
tubes” and the matching rack / insulation plate. Tubes are not included in the set!
Note
The SpeedDigester K-425 is available in different versions for 110 – 120 V or 220 – 240 V mains supply.
Check your local voltage requirements and order accordingly!
13 K-425 / K-436 Operation Manual, Version A
• •* •*
SpeedDigester K- 436
3 Technical data
Configuration
order number
110 – 120 V 220 – 240 V 10 12 250 ml 300 ml 500 ml Standard
n.a. 1154362500
n.a. 1154362100
n.a. 1154362200
n.a. 1154362300
n.a. 1154362400
* Third party sample tubes require special accessories such as the BUCHI “Module for 3rd party
tubes” and the matching rack / insulation plate. Tubes are not included in the set!
Note
The SpeedDigester K-436 is only available for 220 – 240 Vmains supply. Check if a voltage converter
is necessary to adapt your local mains level before connecting the instrument!
Sample
positions
Sample tube sizes Suction modules
Condensate
trap
H2O
• • •
• • •
• • •
• • •
• •* •*
Module for
3rd party
2
tubes
3.1.2 Accessories for 300 ml sample tubes (for standard applications)
Item Additional info Order number
Set of sample tubes 300 ml, 4 tubes 037377 2× 3×
Suction module standard 6 place 11055849 1× 2×
Suction module condensate trap 6 place 11055865 1× 2×
Suction module H
Connectors to suction module Adapter and plug 11055367 1× 2×
EPDM hose Set for K-425 11056005 1× —
EPDM hose set Set for K-436 11056219 — 1×
Insulation plate (fireclay) Insertion, for 300 ml tubes 11055142 1× 2×
Rack 6 place, for 300 ml tubes 11055248 1× 2×
Glass caps (set of 4) OPTIONAL 040049 — —
Insulation cap OPTIONAL 11056024 — —
Sealing FKM (set of 6) Spare part 038122 — —
2O2
6 place, cpl. 11055853 1× 2×
Recommended quantity
to order
K-425 K-436
Sealing PTFE (1 pcs) OPTIONAL 022442 — —
Rubber GUKOs for H
Filter funnel for H
Set circular spring and holder Spare part set of 6 11055984 — —
Bed-plate for 300ml racks OPTIONAL 11055943 — —
14 K-425 / K-436 Operation Manual, Version A
suc. mod. Spare part set of 6 044495 — —
2O2
suc. mod. Spare part set of 6 044494
2O2
3 Technical data
3.1.3 Accessories for 500 ml sample tubes (for large sample volumes / at low nitrogen level)
Standard items Additional info Order number
Sample tubes 500 ml, single tube 026128 5× 10×
Set of sample tubes 500 ml, 4 tubes 043982 2× 3×
Suction module condensate trap 5 place 11055851 1× 2×
Connectors to suction module Adapter and plug 11055367 1× 2×
EPDM hose Set for K-425 11056005 1× —
EPDM hose set Set for K-436 11056219 — 1×
Insulation plate (fireclay) Insertion, for 500 ml tubes 11055143 1× 2×
Rack 5 place, for 500 ml tubes 11055327 1× 2×
Base for rack For 500 ml tubes rack 11055612 1× 1×
Glass caps (set of 4) OPTIONAL 040049 — —
Insulation cap OPTIONAL 11056024 — —
Sealing FKM (set of 6) Spare part 038122 — —
Sealing PTFE (1 pcs) OPTIONAL 022442 — —
Recommended quantity
to order
K-425 K-436
Interlock spring for 500 ml rack Spare part 11055385 — —
3.1.4 Accessories for 3rd party production, 250 ml sample tubes
Item Additional info Order number
3rd party sample tubes 250 ml n.a. 6× 12×
Suction module for 3rd party tubes 6 place 11055850 1× 2×
Connectors to suction module Adapter and plug 11055367 1× 2×
EPDM hose Set for K-425 11056005 1× —
EPDM hose set Set for K-436 11056219 — 1×
Insulation plate (fireclay) Insertion, for 250 ml tubes 11055877 1× 2×
Rack 6 place, for 250 ml tubes 11055440 1× 2×
Sealing FKM (set of 6) Spare part 038125 — —
Recommended quantity
to order
K-425 K-436
Set circular spring and holder 6× Spare part 11055985 — —
Note
3rd party sample tubes are not available at Buchi. Please contact your local OEM vendor for these
type of tubes.
15 K-425 / K-436 Operation Manual, Version A
3.2 Technical data
3.2.1 SpeedDigester K-425 / 110 – 120 V version
Technical data
Power consumption max. 1280 W
Temperature control range level 1 to 10 (70 – 580°C typically)
Connection voltage 110 – 120 VAC
Input fuse T 10A L 250 V
Frequency 50 / 60 Hz
IP degree of protection (two digits) IP 20
3 Technical data
Explanation of protection level:
2 Protection provided by the enclosure against access
to hazardous parts (e.g., electrical conductors,
moving parts) and the ingress of solid foreign objects
with a diameter of > 12,5 mm.
0 No protection of the equipment inside the enclosure
against harmful ingress of water.
Insulation category II
Environmental conditions:
Pollution degree 2 (for indoor use only)
Temperature 5 – 40 °C
Altitude (above sea level) up to 2000 m
Humidity (curve parameter) Maximum relative humidity 80% up to 31 °C, then
decreasing linearly to 50% relative humidity at 40 °C
Dimensions in mm (W × D × H) 310 × 620 × 540
Net weight 12 kg
Rack (without glassware) 2,5 kg
16 K-425 / K-436 Operation Manual, Version A
3.2.2 SpeedDigester K-425 / 220 – 240 V version
Technical data
Power consumption max. 1280 W
Temperature control range level 1 to 10 (70 – 580°C typically)
Connection voltage 220 – 240 VAC
Input fuse T 10A L 250 V
Frequency 50 / 60 Hz
IP degree of protection (two digits) IP 20
Insulation category II
3 Technical data
Explanation of protection level:
2 Protection provided by the enclosure against access
to hazardous parts (e.g., electrical conductors,
moving parts) and the ingress of solid foreign objects
with a diameter of > 12,5 mm.
0 No protection of the equipment inside the enclosure
against harmful ingress of water.
Environmental conditions:
Pollution degree 2 (for indoor use only)
Temperature 5 – 40 °C
Altitude (above sea level) up to 2000 m
Humidity (curve parameter) Maximum relative humidity 80% up to 31 °C, then
decreasing linearly to 50% relative humidity at 40 °C
Dimensions in mm (W × D × H) 310 × 620 × 540
Net weight 12 kg
Rack (without glassware) 2,5 kg
17 K-425 / K-436 Operation Manual, Version A
3.2.3 SpeedDigester K-436 / 220 – 240 V version
Technical data
Power consumption max. 2550 W
Temperature control range level 1 to 10 (70 – 580°C typically)
Connection voltage 220 – 240 VAC
Input fuse T 10A L 250 V
Frequency 50 / 60 Hz
IP degree of protection (two digits) IP 20
Insulation category II
3 Technical data
Explanation of protection level:
2 Protection provided by the enclosure against access
to hazardous parts (e.g., electrical conductors,
moving parts) and the ingress of solid foreign objects
with a diameter of > 12,5 mm.
0 No protection of the equipment inside the enclosure
against harmful ingress of water.
Environmental conditions:
Pollution degree 2 (for indoor use only)
Temperature 5 – 40 °C
Altitude (above sea level) up to 2000 m
Humidity (curve parameter) Maximum relative humidity 80% up to 31 °C, then
decreasing linearly to 50% relative humidity at 40 °C
Dimensions in mm (W × D × H) 310 × 620 × 540
Net weight 15,5 kg
Rack (without glassware) 2× 2,5 kg
18 K-425 / K-436 Operation Manual, Version A
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