vacuubrand CVC 3000 User manual

page 1 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Vacuum controller
CVC 3000
Technology for Vacuum Systems
Instructions for use

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page 2 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
After sales service: Contact your local dealer or call (++49) 9342/808-193.
Dear customer,
Your VACUUBRAND controller should support you for a long time without trouble and with maximal power.
Thanks to our long practical experience we have much information how you could ensure powerful
application and personal safety. Please read these instructions for use before the initial operation of your
controller.
VACUUBRAND controllers are the result of many years of experience in construction and practical operation
of these controllers combined with the latest developments in material and manufacturing technology.
Our quality maxim is the ”zero fault principle”:
Every controller leaving our company is tested intensively including an endurance run. Therefore also
faults which occur rarely, are identified and can be eliminated immediately.
The achievement of the specifications after the endurance run is tested for every controller.
Every VACUUBRAND controller achieves the specifications. We feel obliged to this high quality
standard.
We know that the controller should not take a part of your real work and hope that our products contribute
to an effective and trouble-free realisation of your work.
Yours
VACUUBRAND GMBH + CO KG
➨Danger! Immediate danger. Death or severe injuries as well as damage
to equipment and environment can occur.
☞Warning! Possible danger. Severe injuries as well as damage to equip-
ment and environment can occur.
• Caution! Possible danger. Slight injuries as well as damage to equipment
and environment can occur.
Note. Disregarding of notes may cause damage to the product.
Isolate equipment from mains before removing the cover.
NOTICE

page 3 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Contents
Safety information .....................................................................................................4
General information .......................................................................................................................... 4
Intended use .................................................................................................................................... 4
Connecting the controller ................................................................................................................. 4
Ambient conditions .......................................................................................................................... 5
Operating conditions ........................................................................................................................ 5
Safety during operation .................................................................................................................... 5
Maintenance and repair ................................................................................................................... 6
Technical data............................................................................................................7
Technical data of controller .............................................................................................................. 7
Wetted parts .................................................................................................................................... 8
Technical data power supply ............................................................................................................ 8
Use and operation .....................................................................................................9
Assembling the country specific mains plug .................................................................................... 9
Display and symbols ........................................................................................................................ 9
Notes on operation ........................................................................................................................ 11
Notes on selecting the function ...................................................................................................... 12
Menu guide .............................................................................................................. 13
Function Pump down .............................................................................................. 14
Function Vac control ...............................................................................................16
Function Auto mode (pumps NT VARIO / VARIO-B).............................................. 18
Function Program ...................................................................................................19
Example for use ............................................................................................................................. 20
Function VACUULAN ............................................................................................... 22
Examples for use.....................................................................................................23
Vacuum for filtration and suction .................................................................................................... 23
Vacuum for gel dryer, drying chambers and vacuum concentrators .............................................. 23
Vacuum for distillation and evaporation (e. g. rotary evaporator) .................................................... 24
Vacuum for VACUU•LAN networks ................................................................................................ 25
Function Configuration ...........................................................................................26
Readjustment........................................................................................................... 27
Calibration in the factory ........................................................................................ 28
Interface parameters ............................................................................................... 28
Setting of the interface .................................................................................................................... 28
Read commands CVC 2000 ........................................................................................................... 29
Write commands CVC 2000 ........................................................................................................... 30
Read commands CVC 3000 ........................................................................................................... 31
Write commands CVC 3000 ........................................................................................................... 34
Accessories .............................................................................................................36
Troubleshooting ......................................................................................................37
Cleaning the pressure transducer ......................................................................... 38
Notes on return to the factory ................................................................................ 39
Health and safety clearance form ..........................................................................40

page 4 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Read and comply with this manual before installing or operating the equipment.
To operate the vacuum controller, valves and/or vacuum pumps are necessary. Other-
wise the controller acts as measuring device.
Remove all packing material, remove the product from its packing-box, remove the
protective covers and keep, inspect the equipment.
If the equipment is damaged, notify the supplier and the carrier in writing within three
days; state the item number of the product together with the order number and the
supplier’s invoice number. Retain all packing material for inspection.
Do not use the equipment if it is damaged.
If the equipment is not used immediately, replace the protective covers. Store the
equipment in suitable conditions.
☞Operate the controller only in combination with VACUUBRAND genuine accesso-
ries (e. g. isolation valve, vacuum management module VMS A). Make sure that
the individual components are only connected, combined and operated according
to their design and as indicated in the instructions for use.
☞Comply with notes on correct vacuum and electrical connections, see section ”Use
and operation”.
• The controller is designated for an ambient and gas temperature at the pressure
transducer connection of +10°C to +40°C at continuous operation. If installing the
device into a cabinet or a housing check maximum temperature. Ensure that the
maximum permitted gas temperature at the pressure transducer (see ”Technical
data”) is not exceeded.
Use the equipment for the intended use only, i.e. for measurement and control of
vacuum.
☞Avoid uncontrolled overpressure (e. g. when connecting to a locked or blocked
tube system). Risk of bursting.
•Comply with max. permitted pressure at the pressure transducer, see section
”Technical data”.
• Connect hoses at the pressure transducer gas tight.
• Using a wall power supply, assemble and lock the suitable mains plug (included in
delivery) to the power supply prior to use.
• The controller is equipped with a short circuit proof wide range power supply
with an integrated overload protection. Check that mains voltage and current con-
form with the equipment (see rating plate).
☞Comply with max. permitted gas and ambient temperatures and make sure
ventilation is adequate, if the equipment is installed in a housing or if the ambient
temperature is elevated.
☞Avoid high heat supply (e. g. due to hot process gases).
☞In case of residues, aggressive or condensable media install a gas washing bottle
if necessary.
Safety information
General information
Intended use
Connecting the controller
NOTICE
NOTICE

page 5 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Position device and vacuum connection lines so that no condensate can flow towards
the pressure transducer.
Use inert gas for venting if necessary.
Ensure stability of the hose connection. Comply with all relevant safety requirements.
When the controller is brought from cold environment into a warm room for operation
bedewing may occur. Allow the device to acclimatise.
Comply with national safety regulations and safety requirements concerning the
use of vacuum and electrical equipment. Comply with all applicable and relevant
safety requirements (regulations and guidelines), implement the required actions
and adopt suitable safety measures.
To the best of our knowledge the equipment is in compliance with the requirements of
the applicable EC-directives and harmonized standards with regard to design, type
and model, especially directive IEC 1010 (DIN EN 61010.1). This directive gives in
detail conditions under which the equipment can be operated safely (see also IP de-
gree of protection).
Adopt suitable measures in case of differences, like using the equipment outdoors,
installation in altitudes of more than 1000 m above mean sea level, conductive pollu-
tion or dewiness.
Operating conditions
➨The devices are not suitable for applications which involve dangerous or explo-
sive gases or explosive or flammable mixtures.
Ensure that the materials of the wetted parts are compatible with the substances in
the vacuum system, see section “Technical data”.
➨Adopt suitable measures to prevent the release of dangerous, explosive, corrosive
or polluting fluids, gases or vapours.
➨Prevent any part of the human body from coming in contact with the vacuum.
☞Attention: If the pressure is higher than approximately 1080 mbar the pressure
reading becomes incorrect (saturation of the pressure transducer).The display flashes.
Immediate pressure relief necessary! Risk of bursting!
☞Starting of a NT VARIO / VARIO-B pump, switching of an isolation valve, a coolant
valve or a vacuum pump (in combination with a VMS Module A) or opening of the
venting valve of the controller must not lead to a critical dangerous situation under
any circumstances.
• Use only genuine spare parts and accessories. Otherwise safety and perform-
ance of the equipment as well as the electromagnetic compatibility of the equip-
ment might be reduced.
Possibly the CE mark or the C/US conformity (see rating plate) becomes void if not
using genuine spare parts.
•Attention: If Auto-Start is preselected, the process starts immediately after a
power failure without any further action. It is the user’s responsibility to ensure that
no dangerous status of the system due to the automatic start-up can occur and to
provide appropriate safety measures. If necessary, the user has to check prior to
starting the process whether the option ”Auto-Start” is enabled.
Ambient conditions
Safety during operation
NOTICE
NOTICE
NOTICE
NOTICE

page 6 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Before starting maintenance, isolate the vacuum controller from the vacuum system
and the electrical supply.
Wait two minutes after isolating the equipment from mains to allow the capacitors to
discharge.
•Attention: Due to the operation the device might be contaminated by harmful or
dangerous substances. Clean or decontaminate prior to maintenance.
Before starting maintenance vent the vacuum connection to atmospheric pressure
and isolate the vacuum controller from the vacuum system.
Ensure that maintenance is done only by suitably trained and supervised technicians.
Interior components of the controller can only be repaired at the factory.
In order to comply with law (occupational, health and safety regulations, safety at work
law and regulations for environmental protection) vacuum pumps, components and
measuring instruments returned to the manufacturer can be repaired only when cer-
tain procedures (see section “Notes on return to the factory“) are followed.
Maintenance and repair
Electronic equipment is never 100% fail-safe. This may lead to an ill-defined status of
the equipment or of other connected devices. Provide protective measures against
misfunction and failure. Ensure that in case of failure the controller and the vacuum
system always will turn into a safe status.

page 7 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Technical data
* The actual vacuum control range in your special application might be reduced due to ultimate vacuum of the
pump, quantity of gas occurring etc.
We reserve the right for technical modification without prior notice!
Technical data of controller
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page 8 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
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We reserve the right for technical modification without prior notice!
Technical data power supply
Wetted parts
* if provided
➨The VACUUBRAND controller CVC 3000 can only be operated with components compatible to the
VACUUBRAND VACUU•BUS system, see accessories.
➨Speed control is only possible with VACUUBRAND NT VARIO / VARIO-B pumps and pumping units.

page 9 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Use and operation
The vacuum controller with internal pressure transducer and venting valve controls pumps, valves, NT
VARIO / VARIO-B pumps and pumping units and VARIO-SP pumps.
When switching on the controller CVC 3000 for the very first time, a menu to select the language of the
controller menu is displayed. Select the desired language (” Deutsch ”, ” English ”, ” Français ”) by turning the
selection knob and press to confirm. Then select the pressure unit (” mbar ”, ” Torr ” or” hPa ”) in the same
way.
It is possible to access the language selection menu at any time by switching on the controller
while keeping the selection knob pressed.
After switching on, the version number of the software is displayed, then the preselected function with
pressure reading.
The connected components (pumps, valves, external sensor) are automatically identified and configurated.
Don’t use more than one controller within a VACUU•BUS system. More than one controller within the
same VACUU•BUS system will interfere with each other and cause error messages of the connected
components (pumps, valves).
Pump down
Vac control
Auto mode
Program
VACUULAN
Configuration
Display and symbols
Function of the device
Assembling the country specific mains plug
☞The wall power supply is delivered with a mains plug for
Europe, UK, US and Australia.
☞To replace the mains plug press locking key and remove
mains plug.
☞Assemble the suitable mains plug to the power supply and
lock.
1013.2
mbar
Vac control
100

page 10 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Control is running
Warning notice (if necessary in combination with other symbols), flashing
Coolant valve switched on
Venting valve switched on
PC symbol: controller is in remote operation
In-line valve switched on
preselected pressure unit
actual absolute pressure at the pressure transducer
Keys
Start or Stop of the control
Venting:
• Short pressing vents short-time, control runs on.
• Pressing longer than 2 seconds vents the system to
atmospheric pressure, control stops.
• Selecting menu „function“
• Temporary switching to other functions during operation
Selection knob
• Press to reach the set-up menu of the function
• Turn to reach the parameter set-up
• Press to reach the set value
• Turn to change the set value
• Press to confirm and to reach further parameters or to leave the set-up menu
on/off switch
Vacuum control to a preset vacuum value (here 100 mbar/Torr/hPa)
Process runtime (only if process control is running)
Pump symbol is displayed when pump is running.
If a NT VARIO / VARIO-B pump is connected, the pump’s rotational speed in % is displayed.
Time meter is running (in function ”VACUULAN”), remaining time in minutes is displayed.
Pump down (continuous pumping)
mbar
Torr
hPa
1013.2
00:00:00
100
50%
5

page 11 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
To operate the controller valves and/or vacuum pumps are necessary.
Without those components the controller can be used as vacuum measurement device.
The controller used as measurement device switches a connected coolant valve.
Max. permitted pressure at the pressure transducer: 1.5 bar (abso-
lute).
☞The display flashes at a pressure higher than approximately
1080 mbar. Immediate pressure release. Risk of bursting!
☞Inside a vacuum system where evaporation occurs, e. g.
rotary evaporator, the vacuum is not uniform, e. g. a con-
denser acts as pump or the vacuum in the pipeline is lower
than in the system. Therefore choose the position where to
connect the pressure transducer carefully.
☞Condensate and deposits at the pressure transducer falsify
the measurement result.
☞If residues occur or when working with aggressive or con-
densable substances, install a gas washing bottle in front of
the pressure transducer.
☞Position controller in such a way, that condensate can
not flow into the pressure transducer.
☞If necessary, clean pressure transducer.
vacuum
connection
Notes on operation
connection power supply
or NT VARIO / VARIO-B
pump or pumping unit
rating plate vacuum connection
venting connection
bushes for connection of an isolation
valve and/or coolant valve
and/or external pressure transducer
serial interface
RS 232 C
Rear side CVC 3000
stand foot, removable, also
for mounting in a rod clamp
Attention: Do not cant when assembling or removing plug connections! Comply with correct
positioning of the plug. To connect further components use Y-adapters and extension cables
VACUU•BUS. When connecting an external pressure transducer, it is used automatically. Further
information on how to use several sensors simultaneously is available on request.
vacuum
connection

page 12 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
The controller CVC 3000 can be adapted to the specific application by choosing the appropriate function
depending on the connected components.
Automatic detection of the components:
When switching on the controller, the actual configuration of the connected components is checked
automatically.
Connected components (valves, sensors, pumps) are detected automatically and used and supervised
until the controller is switched off.
The last mode of operation and the preselected values (e. g. for pressure, speed or time for switching off)
are stored.
In case of similar operation conditions it is possible to start immediately, if the preselections are chosen
appropriately.
The controller has five functions and one menu for configuration, see section ”Menu guide”. Each function
includes specific preselection possibilities and is adapted automatically with regard to the connected
components.
Depending on the connected components (valves, pump,...) some menu might not be active!
Changing the function:
➨Switch controller on.
➨Press START/STOP if control is running.
➨Press key MODE.
➨Select function with knob and press to confirm.
☞Depending on the selected function, the controller controls different components.
’’Pump down’’
• Pump or in-line valve depending on pressure and time preselections
• NT VARIO / VARIO-B pumps depending on pressure and time preselections with continuous speed
control
• Coolant valve
”Vac control”
• Pump and / or in-line valve depending on pressure preselection in two-point control
• NT VARIO / VARIO-B pumps depending on pressure preselection with pinpoint precision
• Coolant valve
”Auto mode” (only available if a NT VARIO / VARIO-B pump is connected)
• NT VARIO / VARIO-B pump with pinpoint precision with fully automatic boiling point determination and
adaptation
• Coolant valve
’’Program’’
• Pump or in-line valve depending on pressure and time preselections or ”Auto mode” (”Auto mode” only
available if a NT VARIO / VARIO-B pump is connected)
• Coolant valve
• Venting valve
”VACUULAN”
• Pump or in-line valve depending on pressure and time preselections
• NT VARIO / VARIO-B pump depending on pressure and time preselections with continuous speed
control
• Coolant valve
’’Configuration’’ (Menu also accessible by pressing the selection knob while the start display is shown)
Preselections for
• Adjustment of the pressure transducer
• Interface RS-232
• Sensors (configuration and switching between several sensors)
• Display (brightness and contrast of the display, language, sound)
• Autostart (automatic restart after power failure)
• Defaults (Resetting the controller is to factory set values)
Notes on selecting the function

page 13 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
1013.2
mbar
Vac control
1013.2
mbar
Pump down
Menu guide
(without NT VARIO / VARIO-B pump)
(with NT VARIO /
VARIO-B pump)
Pump down
Speed HI
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - --
- - - - - Back - - - - - - -
Vac control
Set vacuum 100 mbar
Hysteresis Auto
Maximum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - -
- - - - - - Back - - - - - -
Function
Pump down
Vac control
Automatic
Program
VACUULAN
Configuration
- - - - - Back - - - -
Configuration
Adjustment 1013 mbar
RS-232
Sensors
Display
Autostart Off
Defaults Off
- - - - - - Back - - - - - - -
1013.2
mbar
Automatic
1013.2
mbar
VACUULAN
Automatic
Sensitivity normal
Speed HI
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - -
- - - - - - Back - - - - - - -
MODE
MODE MODE
MODEMODE
1013.2
mbar
Program
Vac control
Set vacuum 100 mbar
Speed HI
Maximum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - -
- - - - - - Back - - - - - - -
Program
Edit
Load 0
Store 0
Delay Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - - -
VACUULAN
Set vacuum 25 mbar
Switch on 200 mbar
Delay 15 min
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - - -

page 14 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
➨➨
➨➨
➨Continuous pumping with pressure and time settings
• Operation of a vacuum pump via in-line valve
• Operation of a vacuum pump without in-line valve with VMS (Vacuum Management System,
see ”Accessories”)
• Operation on demand of a speed controlled pump (NT VARIO / VARIO-B)
Preselections
☞Use the selection knob to select the parameters. All parameters can also be altered even while the
operation control is running.
☞ Speed: Only for NT VARIO / VARIO-B pumps: Preselection of the motor speed for pump down. The
selection ”HI” causes the maximum speed and best ultimate vacuum of the pump (with automatic
speed reduction at high vacuum).
The ” Speed ” is adjustable in a range of 1-100% and to ”HI”.
☞ Minimum: The controller switches off the pump or closes the in-line valve when the preset value for
” Minimum ” is reached.
” Minimum ” is adjustable in a range of 1-1060 mbar or can be set to ”Off”.
A preset ” Duration ” (process time) is without effect, if the process is stopped due to a preset ” Minimum ”
before ” Duration ” is reached.
☞ Delay: ” Delay ” determines the time the pump (with VMS and in-line valve) and the coolant valve are
running on after the process has been stopped.
The ” Delay ” is adjustable in a range of 1-300 minutes or can be set to ”Off”.
☞ Duration: ” Duration ” determines the total process time since control start.
The process time is adjustable between 1-1440 minutes (24 h) or can be set to ”Off”. ”Off” indicates
that no endpoint for pump down is determined.
If a ” Duration ” is preset, the controller switches off the pump if the preset process time is reached, also
if a preset ” Minimum ” is still not reached.
☞If neither ” Minimum ” nor ”D uration ” are preset, process control has to be stopped by pressing key
”STOP”.
The screen-shot shows the factory-set values.
Pump down
Speed HI
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
- - - - - - Back- - - - - - - -
00:00:00
When selecting ” Graphic ” the display shows a pressure vs. time curve.
The timeline in the diagram adapts automatically to the process time.
☞Press the selection knob twice to return to the standard display.
Pump down 10 mbar
00:03:50
Function Pump down

page 15 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Temporary switching from ”Pump down”to ”Vac control”or ”Auto mode” (only if control is running):
☞Press key ”MODE”. The controller switches to function ”Vac control”, the current vacuum is used as
set value.
☞Only for VARIO NT pumps: Pressing key ”MODE” again switches to function ”Auto mode”. The con-
troller adapts the boiling pressure starting with the current vacuum.
☞The preset function of the controller does not change due to this temporary switching. When pressing
key ”STOP” the controller is in function ”Pump down” again.
Adapting the speed (only for NT VARIO / VARIO-B pumps) during pump down:
☞Press the selection knob and turn.
☞Turning the knob to the left reduces the speed.
☞Turning the knob to the right increases the speed.

page 16 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Preselections
☞Use the selection knob to select the parameters. All parameters can also be altered even while the
operation control is running.
☞ Set vacuum: The ” Set vacuum ” is the lower vacuum value for two-point control or the set point for
vacuum control with pinpoint precision for NT VARIO / VARIO-B pumps.The selection ”Turbo” (only NT
VARIO / VARIO-B pumps) leads to the optimum backing pressure for a turbomolecular pump.
The ” Set vacuum ” is adjustable in a range of 1 - 1060 mbar or can be set to ”Turbo”.
☞ Hysteresis: Control bandwidth of a two-point control. A too small hysteresis leads to frequent switch-
ing of the valve or the pump. A too large hysteresis leads to imprecise control. NT VARIO / VARIO-B
pumps are controlled without hysteresis. Suggested values (see table) for the ” Hysteresis ” are stored
in the controller (setup ”Auto”) and are adapted automatically to the preset pressure. Adapting the
” Hysteresis ” by the user is possible at any time.
The ” Hysteresis ” is adjustable in a range of 1 - 300 mbar or can be set to ”Auto”.
➨➨
➨➨
➨Vacuum control to a preset vacuum value
• Operation of a vacuum pump via in-line valve
• Operation of a vacuum pump without in-line valve with VMS (Vacuum Management System,
see ”Accessories”)
• Operation on demand of a speed controlled pump (NT VARIO / VARIO-B)
☞ Speed: Only for speed controlled pumps (NT VARIO / VARIO-B): The maximum motor speed can
be preselected (to control the pumping speed).
The selection ”HI” (recommended) provides the optimum pumping speed of the pump and therefore an
optimum ultimate vacuum.
The ” Speed ” is adjustable in a range of 1-100% or can be set to ”HI”.
☞ Maximum: An upper pressure limit can be preselected. The pump switches off if the pressure limit is
exceeded, e. g. at the end of suctions, filtrations.The pressure limit is only active once the pressure has
gone below the ” Maximum ”.
The ” Maximum ” is adjustable in a range of 1059 - 1 mbar (at the least 1 mbar higher than the ” Set
vacuum ”) and to ”Off”. ”Off” indicates that no maximum value is preset.
☞ Delay: ” Delay ” determines the time the pump (with VMS and in-line valve) and the coolant valve are
running on after the process has been stopped.
The ” Delay ” is adjustable in a range of 1-300 minutes or can be set to ”Off”.
☞ Duration: ” Duration ” determines the total process time since control start.
The process time is adjustable between 1-1440 minutes (24 h) or can be set to ”Off”. ”Off” indicates
that no endpoint for pump down is determined.
If a ” Duration ” is preset, the controller switches off the pump if the preset process time is reached, also
if a preset ” Minimum ” is still not reached.
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Function Vac control

page 17 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Vac control
Set vacuum 100 mbar
Speed HI
Maximum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - -
00:00:00
Vac control
Set vacuum 100 mbar
Hysteresis Auto
Maximum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - -
Vacuum control without NT VARIO /
VARIO-B pump
00:00:00
The screen-shots show the factory-set values.
When selecting ” Graphic ” the display shows a pressure vs. time curve.
Temporary switching from ”Vac control” to ”Auto mode” (only NT VARIO / VARIO-B pumps) while
process control is running:
☞Press key MODE. The controller switches to ”Auto mode” and adapts the boiling pressure starting
with the actual set value. The preset function of the controller does not change due to this switching.
When pressing key ”STOP” the controller is in function ”Vac control” again.
Adjustment of the ” Set vacuum ” during vacuum control:
Dynamic, interactive adaption:
☞Press the selection knob and keep pressed.
☞Turning the knob for a 1/4 turn to the left causes pump down.
☞Turning the knob for a 1/4 turn to the right causes venting.
☞When the knob is released the actual value is taken over as new set value.
Alternatively:
Fine tuning:
The ” Set vacuum ” can be adapted only by turning the selection knob while process is running.
☞Turn the selection knob.
☞A full turn causes a change of the ” Set vacuum ” of 12 mbar.
☞Turning the knob for one detent causes a change of the ” Set vacuum ” of 1 mbar.
The timeline in the diagram adapts automatically to the process time.
☞Press the selection knob twice to return to the standard display.
Vakuumregler 80 mbar
00:13:00
Vacuum control with NT VARIO /
VARIO-B pump

page 18 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Preselections
☞The selection of the parameters is carried out via the selection knob.
☞ Sensitivity : The ” Sensitivity ” of the control effects the control speed. High sensitivity leads to a re-
duced pumping down speed, e. g. for small amounts of solvents or foaming processes. Use a low
sensitivity for ”uncritical” processes to reduce process time. Usually setting the ” Sensitivity ” to ”normal”
is appropriate.
The ” Sensitivity ” is adjustable to ”high”, ”normal” or ”low”.
☞ Speed: The maximum motor speed can be preselected (to control the pumping speed).The selection
”HI” (recommended) causes an automatic limitation of the adaptation depending on parameters deter-
mined during the process. Only in case of very sensitive processes it is recommended to reduce the
maximum speed.
The ” Speed ” is adjustable in a range of 1-100% or can be set to ”HI”.
☞ Minimum : If the vacuum value reaches ” Minimum ” the process is stopped. Use ” Minimum ” for auto-
matic process termination.When selecting ”Auto” the controller switches off automatically at the end of
the process (boiling plateau), recommended only for large solvent amounts.
The ” Minimum ” is adjustable in a range of 2 - 1060 mbar or can be set to ”Auto” or ”Off”.
☞ Delay: ” Delay ” determines the time the coolant valve continues to run after process stop.
The ” Delay ” is adjustable in a range of 1-300 minutes or can be set to ”Off”.
☞ Duration: ” Duration ” determines the total process time since control start.
The process time is adjustable between 1-1440 minutes (24 h) or can be set to ”Off”. ”Off” indicates
that no endpoint for pump down is determined.
If a ” Duration ” is preset, the controller switches off the pump if the preset process time is reached, also
if a preset ” Minimum ” is still not reached.
➨Control of a NTVARIO / VARIO-B pump in operation mode auto mode: Automatic determination
of the boiling vacuum and automatic adapting of the boiling vacuum also in case of changing
process parameters.
Auto mode
Sensitivity normal
Speed HI
Minimum Off
Delay Off
Duration Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - -
00:00:00
The screen-shot shows the factory-set values.
When ” Graphic ” is selected the display shows a pressure vs. time curve (right screen-shot).
Temporary switching from ”Auto mode” into function ”Vac control”
☞Press key ”MODE”.The controller switches to ”Vac control” . The current pressure is used and held as
new set point.
☞The preset function of the controller does not change due to this temporary switching.When pressing
key ”STOP” the controller is in function ”Auto mode” again.
The timeline in the diagram adapts automatically to the process time.
☞Press the selection knob twice to return to the standard display.
Automatik 50 mbar
00:07:45
Function Auto mode (pumps NT VARIO / VARIO-B)

page 19 of 42
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 99 91 51 / 04/01/2008
Program -
Edit
Load 0
Store 0
Hysteresis Auto
Delay Off
- - - - - - Graphic - - - - - -
- - - - - - Back - - - - - - -
1013mbar
➨➨
➨➨
➨Ten programs with up to ten program steps with preset values for vacuum and time can be set
and stored.
☞ Edit : Preset values for the process run can be edited:
Time: Process runtime to reach a preset vacuum level or if setting ”Step” runtime after having achieved
the vacuum level. A preset runtime of 18:00:00 hours in the final program step will cause the process
to run endlessly. Terminationof the process by pressing key ”STOP”.
Vacuum: Vacuum level to be attained.
Venting valve: Operation of a venting valve to reach a preset vacuum level.
”Step”: ”Step” causes pump down as fast as possible to the preset vacuum level. As soon as the
vacuum level is reached, the time meter starts to run.
Auto (”Auto” only for NT VARIO / VARIO-B pumps): Auto = 1 means automatic determination of a
boiling point and adaptation to changes of the boiling point within the preselected time interval. Auto =
2 means automatic adaptation to changes of the boiling point. If selecting ”Auto” without ”Step” the
program step is finished when the selected time or vacuum value has been reached.
”Step” in combination with Auto = 1: Pump down as fast as possible to the preset vacuum level. Then
the automatic determination and later adaptation of a boiling point is started.
”Step” in combination with Auto = 2: Pump down as fast as possible to the preset vacuum level. The
reached vacuum level is then set as boiling point and automatically adapted to changes of the boiling
point.
☞ Load : Load programs (Program 0 - 9).
☞ Store : This command stores an edited program or the program of the just expired process to one of
the storage spaces 0 - 9.
☞ Hysteresis: Control bandwidth of a two-point control. A too small hysteresis leads to frequent switch-
ing of the valve or the pump, a too large hysteresis leads to imprecise control. NT VARIO / VARIO-B
pumps are controlled without hysteresis. Suggested values for the ” Hysteresis ” are stored in the
controller (setup ”Auto”) and are adapted automatically to the preset pressure. Adapting the ” Hyster-
esis ” by the user is possible at any time.
The ” Hysteresis ” is adjustable in a range of 1 - 300 mbar or can be set to ”Auto”.
☞ Delay : ” Delay ” specifies the time which the pump (with VMS and in-line valve) and the coolant valve
continue to run after process stop.
The ” Delay ” is adjustable in a range of 1-300 minutes and to ”Off”.
The screen-shot shows the factory-set values.
When ”Graphic” is selected the display shows a pressure vs. time curve (right screen-shot).
Program 5 : 4 1013mbar 900mbar
00:28:00
Function Program
Editing:
☞To select row: turn and press selection knob.
☞Turning the selection knob: adjust parameter.
☞Pressing the selection knob: confirm parameter, jump to next parameter.
☞After 2 seconds without change the parameter is accepted automatically.