Buchi V-850 Installation manual

Vacuum Controller V-850 / V-855
Operation Manual
093081 en

Imprint
Product Identification:
Operation Manual (Original), Vacuum Controller V-850 / V-855
093081 en
Publication date:
08.2015, Version E
BÜCHI Labortechnik AG
Meierseggstrasse 40
Postfach
CH-9230 Flawil 1
E-Mail: [e-mail]
BUCHI reserves the right to make changes to the manual as deemed necessary in the light of experience; espe-
cially in respect to structure, illustrations and technical detail.
This manual is copyright. Information from it may not be reproduced, distributed, or used for competitive purpos-
es, nor made available to third parties. The manufacture of any component with the aid of this manual without
prior written agreement is also prohibited.

Table of contents
3
V-850 / V-855 Operation Manual, Version E
Table of contents
1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 Reference documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 signals used in this manual . . . . . . . . . . . . . . . . . 7
2.5 Product safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.6 General safety rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.1 Basic instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.2 Standard accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.3 Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Technical data overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Materials used. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Solvent table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Description of function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Functional principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1.1 Control keys of Vacuum Controller V-850/855. . . . . . . . . . . . . . . . . . . . . 16
4.1.2 Rear connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Controller operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.1 Manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.2 Timer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.3 AutoDest mode (V-855 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.4 EasyVac mode (V-855 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.5 Gradient mode (V-855 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.6 Repeat mode (V-855 only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.7 LabVac mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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.
This manual is copyright. Information from it may not be reproduced, distributed, or used for competi-
tive 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. Other language versions can be downloaded at www.buchi.com.

Table of contents
4
V-850 / V-855 Operation Manual, Version E
5 Putting into operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Setting up the Rotavapor with the Vacuum Controller V-850 / V-855 . . . . . . . . . 20
5.1.1 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1.2 Cable connections to the Rotavapor . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Communication of Rotavapor and Vacuum Controller V-850 / V-855 . . . . . . . . . 21
5.2.1 Rotavapors R-200 / R-205 and R-210 / R-215 . . . . . . . . . . . . . . . . . . . . 21
5.2.2 Rotavapors R-220 SE and R-220 and R-250 with firmware 2.06 or higher . . . . . . 21
5.3 Installing the AutoDest probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4 Initial software settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 Menu structure of the Vacuum Controller V-850 / V-855 software . . . . . . . . . . . 26
6.2 Vacuum Controller V-850 / V-855 main screen in Manual mode . . . . . . . . . . . . 27
6.3 Selecting the distillation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.4 Starting a distillation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.4.1 Quick start of manual distillation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.4.2 Advanced settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.4.3 Working with a connected F-series chiller . . . . . . . . . . . . . . . . . . . . . . . 31
6.5 Vacuum Controller V-850 / V-855 main screen in Gradient mode . . . . . . . . . . . 32
6.6 General information on buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.6.1 Control buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.6.2 Menu buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.7 Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.7.1 Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.7.2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.7.3 Program (V-855 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.7.4 Solvent library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.7.5 Extra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.8 Calibrating the pressure sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.8.1 Offset calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.8.2 Simple calibration (without temperature compensation) . . . . . . . . . . . . . . . . 41
6.8.3 Complete calibration with temperature compensation . . . . . . . . . . . . . . . . . 41
6.9 Recirculating chiller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.10 Tips and tricks for a distillation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.10.1 What to do when the solvent starts foaming? . . . . . . . . . . . . . . . . . . . . . 44
6.10.2 How to find out the distillation conditions for a solvent? . . . . . . . . . . . . . . . . 44
6.10.3 How to start a distillation without determining a pressure setpoint? . . . . . . . . . . 44
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.1 Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2 Functional test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8.1 Malfunctions and their remedy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8.2 Customer service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9 Shutdown, storage, transport and disposal . . . . . . . . . . . . . . . . . . . . . . . . 48
9.1 Storage and transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.2 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10 Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11 Declarations and requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.1 FCC requirements (for USA and Canada) . . . . . . . . . . . . . . . . . . . . . . . 51
11.2 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

1 About this manual
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V-850 / V-855 Operation Manual, Version E
1 About this manual
This manual describes the vacuum controller and provides all information required for its safe opera-
tion and to maintain it in good working order.
It is addressed in particular to laboratory personnel and operators.
NOTE:
The symbols pertaining to safety (WARNINGS and ATTENTIONS) are explained in chapter 2.
1.1 Reference documents
For information on the Rotavapor R-210 / R-215 and the Vacuum Pump V-700 / V-710, please refer to
the corresponding manuals available in English, German, French, Spanish and Italian:
• Rotavapor R-210 / R-215, Operation Manual numbers 93076–93080
• Vacuum Pump, Operation Manual numbers 93090–93094
1.2 Trademarks
The following product names and any registered and unregistered trademarks mentioned in this
manual are used for identification purposes only and remain the exclusive property of their respective
owners:
• Rotavapor® is a registered trademark of BÜCHI Labortechnik AG
1.3 Abbreviations
FFKM: Perfluoroelastomer
PBT: Polybutylene Terephthalate
PES: Polyester
PVC: Polyvinyl chloride
PEEK: Polyetheretherketone

2 Safety
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V-850 / V-855 Operation Manual, Version E
2 Safety
This chapter points out the safety concept of the instrument and contains general rules of behavior
and warnings from hazards concerning the use of the product.
The safety of users and personnel can only be ensured if these safety instructions and the safety-
related warnings in the individual chapters are strictly observed and followed. Therefore, the manual
must always be available to all persons performing the tasks described herein.
2.1 User qualification
The instrument may only be used by laboratory personnel and other persons who on account of
training or professional experience have an overview of the dangers which can develop when
operating the instrument.
Personnel without this training or persons who are currently being trained require careful instruction.
The present Operation Manual serves as the basis for this.
2.2 Proper use
This instrument has been designed and built for laboratories. Its proper use includes regulating and
displaying a vacuum in a working range between 0 mbar up to atmospheric pressure.
The vacuum controller is used for:
• Distillation instruments, especially rotary evaporators
• Vacuum drying cabinets
2.3 Improper use
Applications not mentioned above are improper. Also, applications, which do not comply with the
technical data, are considered improper. The operator bears the sole risk for any damages caused by
such improper use.
The following uses are expressly forbidden:
• Use of the instrument in rooms which require ex-protected instruments.
• Use as calibrating instrument for other instruments.
• Use in excess pressure.

2 Safety
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V-850 / V-855 Operation Manual, Version E
2.4 Safety warnings and safety signals 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 below table 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. ★★★★
WARNING Indicates a hazardous situation which, if not avoided, could result
in death or serious injury. ★★★☆
CAUTION Indicates a hazardous situation which, if not avoided, may result
in minor or moderate injury. ★★☆☆
no NOTICE Indicates possible property damage, but no
practices related to personal injury.
★☆☆☆
(property damage only)
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.
!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.
• ...
• ...
Table of supplementary safety information symbols
The below reference list incorporates all safety information symbols used in this manual and their
meaning.
Symbol Meaning
General warning
Electrical hazard
Device damage

2 Safety
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V-850 / V-855 Operation Manual, Version E
Symbol Meaning
Hot item, hot surface
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 example below).
NOTE
Useful tips for the easy operation of the instrument.
2.5 Product safety
Safety warnings in this manual (as described in section 2.4) serve to make the user alert and to 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.
The following safety messages show hazards of general kind which may occur when handling the
instrument. The user must 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.
NOTICE
Risk of instrument damage by wrong mains supply.
• External mains supply must meet the voltage given on the type plate
NOTE
Electromagnetic radiation may affect the pressure measurement so that the measured pressure value
can be adulterated.
• Keep the instrument from the influence of electromagnetic radiation.

2 Safety
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V-850 / V-855 Operation Manual, Version E
2.6 General safety rules
Responsibility of the operator
The head of laboratory is responsible for training his personnel.
The operator shall inform the manufacturer without delay of any safety-related incidents which might
occur during operation of the instrument. Legal regulations, such as local, state and federal laws
applying to the instrument must be strictly followed.
Duty of maintenance and care
The operator is responsible for ensuring that the instrument is operated in proper condition only, and
that maintenance, service, and repair jobs are performed with care and on schedule, and by autho-
rized personnel only.
Spare parts to be used
Use only genuine consumables and genuine spare parts for maintenance to assure good system
performance and reliability. Any modifications to the spare parts used are only allowed with the prior
written permission of the manufacturer.
Modifications
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.

3 Technical data
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V-850 / V-855 Operation Manual, Version E
3 Technical data
This chapter introduces the reader to the instrument specifications. It contains the scope of delivery,
technical data, requirements and performance data.
3.1 Scope of delivery
Check the scope of delivery according to the order number.
3.1.1 Basic instrument
Basic instrument V-850
Product Order number
Vacuum Controller V-850 stand alone (100 V–230 V), including power pack (47259) 47231
Vacuum Controller V-850 for R-210 / R-215 and V-700 / V-710 (100 V–230 V), including support
and communication cable
47299
Vacuum Controller V-850 for R-200 / R-205 (100 V–230 V), including support, communication cable
R-200 / R-205 and power pack (47259)
47297
Vacuum Controller V-850 for R-220 SE (100 V- 230 V) 48531
Vacuum Controller V-850 for R-250 (100 V- 230 V), including support, communication cable R-250 and
power pack (47259)
47293
Basic instrument V-855
Product Order number
Vacuum Controller V-855 stand alone (100 V–230 V) without automatic distillation probe 47235,
including power pack (47259)
47232
Vacuum Controller V-855 for R-210 / R-215 and V-700/710 (100 V–230 V) without automatic distilla-
tion probe 47235, including support and communication cable (47280)
47298
Vacuum Controller V-855 for R-200 / R-205 (100 V–230 V) without automatic distillation probe 47235,
including support, communication cable R-200 / R-205 and power pack (47259)
47296
Vacuum Controller V-855 for R-220 SE (100 V- 230 V) without automatic distillation probe 47235 48532
Vacuum Controller V-855 for R-250 (100 V- 230 V) without automatic distillation probe 47235, including
support, communication cable R-250 and power pack (47259)
47292

3 Technical data
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V-850 / V-855 Operation Manual, Version E
3.1.2 Standard accessories
Standard accessories
Product Order number
Operation Manual:
English 93081
German 93082
French 93083
Italian 93084
Spanish 93085
3.1.3 Optional accessories
Optional accessories
Product Order number
1 Valve unit for Vacuum Controller V-850 /
R-855, including holder
47160
1 Holder for valve unit on Rotavapor
R-210 / R-215
47164
Woulff bottle complete including holder 47170
Woulff bottle glass part, P+G coated 47233
Holder for Woulff bottle 47164
1 Remote control for V-850 / V-855
complete
47230
Water jet pump unit B-767 with 2
magnetic valves 24 V for pump and
cooling water (with an FFKM-backstroke
valve)
31357
Water jet pump unit B-764 with magnetic
valve 24 V (with an FFKM-backstroke
valve) (see example on the left)
31358

3 Technical data
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V-850 / V-855 Operation Manual, Version E
Optional accessories (cont.)
Product Order number
Vacuum valve 24 V/2.4 mm for use with
a 1 l Rotavapor with Y-piece for vacuum
controller
31353
Vacuum valve 24 V/4 mm for use with a
20 l Rotavapor
31354
Vacuum valve 24 V/4 mm for use with a
50 l Rotavapor (see example on the left)
31355
Cooling water valve 24 V 31356
Water control valve ½” 11606
Connecting cable V-850 / V-855 (1200
mm)for R-220 / R-250
40758
Connecting cable V-850 / V-855 (250
mm) for R-200 / R-205
40742
Control cable between vacuum controller
and Vacuum Pump RJ 45,
330 mm (speed control)
44288
Control cable between Rotavapor and
Vacuum Pump and/or chiller RJ 45,
2000 mm (speed control)
44989
Control cable between Rotavapor and
Vacuum Pump and/or chiller RJ 45,
5000 mm (speed control)
11056240

3 Technical data
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V-850 / V-855 Operation Manual, Version E
Control cable Mini DIN 1500 mm between
vacuum controller and vacuum pump (on/
off) compatible with Vacuum Controller
V-800 / V-805 / V-850 / V-855 and
Vacuum Pump V-500 / V-1000
38010
Optional accessories (cont.)
Product Order number
Support set for vacuum controller or
manometer with needle valve for
R-210 / R-215, V-700 / V-710
47280
Power pack for V-850 / V-855 (stand-
alone)
47259
Automatic distillation probe for V-855
(only for glass assembly V + S)
47235
1
2
Vacuum tube 6/16 mm a17622
Cooling water tube silicone 6/9 mm b04133

3 Technical data
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V-850 / V-855 Operation Manual, Version E
3.2 Technical data overview
Technical data
Vacuum Controller V-850 / V-855
Dimensions casing ( W×H×D) 160×115×120 mm
Weight 700 g
Power supply 30 VDC from RJ-45 connector when using Controller
with a Rotavapor R-210 / R-215 or Vacuum Pump V-700
/ V-710 or from the power pack for stand-alone versions.
Frequency 50/60 Hz
Power consumption 10 W
Interfaces USB (data transmission), RS 232 / RS 485 (communica-
tion), remote control, cooling water valve, Switch Box,
vacuum valve
Environmental conditions For indoor use only 10-40 °C, up to 2000 m, maximum
relative humidity 80 % for temperatures up to 31 °C, and
then linearly decreasing to 50 % at 40 °C
Magnetic valve supply 24 V
Vacuum connection GL14
Measuring principle Capacitive
Measuring range 1400–0 mbar
Control range 1100–1 mbar
Accuracy ±2 mbar (±1 digit) following alignment at constant
temperature
Temperature response 0.07 mbar/K-1
Display range 0–1400 mbar
Hysteresis Automatic or 1–500 mbar
Installation category II
Pollution degree 2
Conformity CSA/CE
Noise level < 70 dB
3.3 Materials used
Materials used
Component Material designation
Pressure foil Polyester
Casing PBT
Diaphragm (aeration valve) FFKM
Aeration valve PEEK

3 Technical data
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V-850 / V-855 Operation Manual, Version E
3.4 Solvent table
Solvent Formula
Molar mass
in g/mol
Evaporation energy
in J/g
Boiling point
at 1013 mbar
Density in
g/cm3
Vacuum in mbar for
boiling point at 40 °C
Acetone CH3H6O 58.1 553 56 0.790 556
n-amylalcohol, n-pentanol C5H12O 88.1 595 37 0.814 11
Benzene C6H678.1 548 80 0.877 236
n-butanol C4H10O 74.1 620 118 0.810 25
tert. butanol (2-methyl-2-propanol) C4H10O 74.1 590 82 0.789 130
Chlorobenzene C6H5Cl 112.6 377 132 1.106 36
Chloroform CHCl3119.4 264 62 1.483 474
Cyclohexane C6H12 84.0 389 81 0.779 235
Diethylether C4H10O 74.0 389 35 0.714 850
1,2-dichloroethane C2H4Cl299.0 335 84 1.235 210
1,2-dichloroethylene (cis) C2H2Cl297.0 322 60 1.284 479
1,2-dichloroethylene (trans) C2H2Cl297.0 314 48 1.257 751
Diisopropyl ether C6H14O 102.0 318 68 0.724 375
Dioxane C4H8O288.1 406 101 1.034 107
DMF (dimethyl-formamide) C3H7NO 73.1 153 0.949 11
Acetic acid C2H4O260.0 695 118 1.049 44
Ethanol C2H6O 46.0 879 79 0.789 175
Ethylacetate C4H8O288.1 394 77 0.900 240
Heptane C7H16 100.2 373 98 0.684 120
Hexane C6H14 86.2 368 69 0.660 360
Isopropylalcohol C3H8O 60.1 699 82 0.786 137
Isoamylalcohol (3-methyl-1-butanol) C5H12O 88.1 595 129 0.809 14
Methylethylketone C4H8O 72.1 473 80 0.805 243
Methanol CH4O 32.0 1227 65 0.791 337
Methylene chloride, dichloromethane CH2CI284.9 373 40 1.327 850
Pentane C5H12 72.1 381 36 06.26 850
n-propylalcohol C3H8O 60.1 787 97 0.804 67
Pentachloroethane C2HCl5202.3 201 162 1.680 13
1,1,2,2-tetra-chloroethane C2H2Cl4167.9 247 146 1.595 20
Tetrachlorocarbon CCl4153.8 226 77 1.594 271
1,1,1-trichloroethane C2H3Cl3133.4 251 74 1.339 300
Tetra-chloro-ethylene C2Cl4165.8 234 121 1.623 53
THF (tetrahydrofurane) C4H8O 72.1 67 0.889 374
Toluene C7H892.2 427 111 0.867 77
Trichloroethylene C2HCl3131.3 264 87 1.464 183
Water H2O 18.0 2261 100 1.000 72
Xylene (mixture) C8H10 106.2 389 25

4 Description of function
16
V-850 / V-855 Operation Manual, Version E
4 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
The Vacuum Controller V-850 and V-855 can be universally used for the display, adjustment and
control of vacuum. The integrated aeration valve and the precision pressure sensor are resistant to
chemicals making the Vacuum Controller a compact unit suitable for numerous applications in the
Lab. When using the vacuum controller with a Vacuum Pump V-700 or V-710 the new speed control
feature allows a hysteresis-free vacuum control with a low noise level.
4.1.1 Control keys of Vacuum Controller V-850 / V-855
1
2
3
4
5
2 2 2
aSelection knob
bFunctional buttons
cDisplay
dSTART button
eSTOP button

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V-850 / V-855 Operation Manual, Version E
4.1.2 Rear connections
1
2
3
4
56
7
12
8
11
aConnection for AutoDest probe/switch box (AS/SB)
bConnection for cooling water valve (CW)
cConnection for valve unit or vacuum valve (VALVE)
dPower supply connection for stand alone mode
30 VDC
eMains switch On/Off
fUSB for data output/firmware update
gFixation for support rod
hRS 485 connection to V-700 / V-710 or R-210 / R-215
iRemote control (RC 81)
jRS 232 connection for Rotavapor (R-200 / R-205 /
R-250)
kAeration valve with inert gas connection
lVacuum connection to valve unit/Woulff bottle
4.2 Controller operation modes
When using a Rotavapor R-200 / R-205 or R-210 / R-215 seven different modes are available for the
vacuum controller:
• Manual mode
• Timer mode
• AutoDest mode (V-855 only)
• EasyVac mode (V-855 only)
• Gradient mode (V-855 only)
• Repeat mode (V-855 only)
• LabVac mode
When using a Rotavapor R-220 SE or R-250 four different modes are available for the vacuum
controller:
• Manual mode
• Timer mode
• Gradient mode (V-855 only)
• Repeat mode (V-855 only)
All modes are described in the following.
910

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V-850 / V-855 Operation Manual, Version E
4.2.1 Manual mode
The Manual mode serves to maintain and control a preset pressure. The pressure setpoint can be
adjusted by means of the selection knob when the pump is running or, before operation, via the corre-
sponding menu by pressing the menu button P Set.
4.2.2 Timer mode
The Timer mode serves to control the pressure over a predefined time interval. When the time interval
is over, the process stops.
4.2.3 AutoDest mode (V-855 only)
The AutoDest mode serves to carry out an automatic distillation based on the temperature differences
within the condenser. Thanks to the AutoDest probe mixtures can be distilled gently and automatically.
The redistillation will also be considered.
4.2.4 EasyVac mode (V-855 only)
The EasyVac mode serves to carry out an automatic distillation based on the vapor pressure of the
solvent. The process is started at the push of a button. The start point of the distillation will be identi-
fied automatically. Then the pressure is adapted according to the vapor pressure curve and the end
point of the distillation is determined. Based on sophisticated algorithms the process is executed in a
robust, gentle way. This mode is suited for distilling single solvents.
NOTE
The EasyVac mode only works with a speed controlled Vacuum Pump V-700 / V-710.
1
2
p
t
aDetection start of distillation bDetection end of distillation
4.2.5 Gradient mode (V-855 only)
The Gradient mode serves to define up to 15 programs with up to 20 steps each. For a description of
how to define programs, see chapter 6.7.3.
4.2.6 Repeat mode (V-855 only)
The Repeat mode serves to reproduce a distillation. The pressure course of the last manual or auto-
matic distillation can be saved and reused as setpoint settings to supply optimum process conditions.

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V-850 / V-855 Operation Manual, Version E
4.2.7 LabVac mode
The LabVac mode serves to control the pump within a laboratory vacuum system.
The pump operation is switched off when the vacuum has reached the lowest possible value and is
switched on again when the pressure increases by a preset value (hysteresis [dP]). The pump opera-
tion is also switched on, as soon as a load is present in the vacuum system.
When the menu button CONT. is pressed the pump operates in Continuous mode to obtain a vacuum
as low as possible independent of the connected load.
1
2
p
t
aPump not running bPump running

5 Putting into operation
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V-850 / V-855 Operation Manual, Version E
5 Putting into operation
This chapter describes how the instrument is installed and gives instructions on initial startup.
NOTE:
Inspect the instrument for damages during unpacking. If necessary, prepare a status report immedi-
ately to inform the postal company, railway company or transportation company.
Keep the original packaging for future transport.
5.1 Setting up the Rotavapor with the Vacuum Controller V-850 / V-855
5.1.1 Installation
3
2
1
To install the vacuum controller to the Rotavapor,
proceed as follows:
• Screw the holder a for the vacuum controller
to the top of the Rotavapor.
• Slide the guide rail bof the vacuum controller
over the holder.
• Fix the vacuum controller to the holder by
tightening the knurled nut c.