Memmert VO200 User manual

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Vacuum Drying Oven
VO200 / VO400 / VO500
Operating Instructions
Pump Module
PM200 / PM400 / PM500

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1. Contents
1. Contents......................................................................................................................................................................2
2. General notes and safety notes ....................................................................................................................................4
2.1 Material quality from MEMMERT:.......................................................................................................................4
2.2 Transport ...........................................................................................................................................................5
2.3 Initial start-up....................................................................................................................................................5
2.4 Oven load..........................................................................................................................................................5
2.5 Safety check ......................................................................................................................................................5
3. Technical data..............................................................................................................................................................6
3.1 Standard equipment of VO-ovens ......................................................................................................................7
3.2 Electrical equipment ..........................................................................................................................................8
3.3 External connection ...........................................................................................................................................8
4. Installation facilities (accessories)..................................................................................................................................9
4.1 Subframe...........................................................................................................................................................9
4.2 Stackable version ...............................................................................................................................................9
5. Oven construction and connections............................................................................................................................10
6. Starting up ................................................................................................................................................................12
7. Switching output for external vacuum pump purge valve and pump control...............................................................13
7.1 Vacuum pump purge valve ..............................................................................................................................13
7.2 Demand-controlled vacuum pump shut-down .................................................................................................13
8. Loading and Inertgas .................................................................................................................................................14
9. Guidelines for evaporating liquids in Memmert-vacuum ovens....................................................................................15
10. Controls and indications.............................................................................................................................................16
11. Operating the door....................................................................................................................................................16
12. Switching on .............................................................................................................................................................16
13. Setting the temperature.............................................................................................................................................16
14. Quick venting function...............................................................................................................................................17
15. Status indication for the heating levels .......................................................................................................................17
16. Selecting the operating mode ....................................................................................................................................18
17. Setting the parameters............................................................................................................................................... 18
18. Normal operation ............................................................................................................................................19
Setting example “Normal operation“..........................................................................................................................20
19. Weekly programmer ........................................................................................................................................21
Programming example “Weekly programmer“............................................................................................................22
20. Programme operation ......................................................................................................................................23
20.1 Closure commands for ramp segments ............................................................................................................25
Programming example programme operation ............................................................................................................26
21. Printer
PRINT .............................................................................................................................................................29
22. Basic oven settings SETUP ...........................................................................................................................................30
22.1 Real-time clock ................................................................................................................................................31

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23. Temperature monitor and protection devices..............................................................................................................32
23.1 Mechanical temperature monitor: temperature limiter (TB)...............................................................................32
23.2 Electronic temperature monitor........................................................................................................................33
23.2.1 Overtemperature protection MAX ................................................................................................................33
23.2.2 Undertemperature protection MIN ..............................................................................................................33
23.2.3 Adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12 880................................................... 34
23.2.4 Adjustable temperature limiter (TWB) Protection Class 2 to DIN 12 880..........................................................34
23.2.5 Automatic temperature monitor (ASF) AUTO .............................................................................................35
24. Calibration.................................................................................................................................................................38
24.1 Calibration-temperature...................................................................................................................................38
24.2 Calibration-pressure (vacuum)..........................................................................................................................40
25. Communication interface for the PC...........................................................................................................................42
25.1 Communication interface RS232C ....................................................................................................................42
25.2 Bus interface RS485 .........................................................................................................................................43
26. Report memory..........................................................................................................................................................44
26.1 Reading the report memory .............................................................................................................................44
26.2 Reading the report memory into the PC via RS232C..........................................................................................44
26.3 Printing the report memory from the oven .......................................................................................................44
27. Memory card: MEMoryCardXL ...................................................................................................................................45
27.1 Programming the MEMoryCardXL from the oven .............................................................................................45
27.2 Programming the MEMoryCardXL from a PC with the oven..............................................................................45
27.3 Programming the MEMoryCardXL from a PC using the read-write unit .............................................................45
27.4 Documentation on memory card MEMoryCardXL.............................................................................................46
28. USER-IDcard (available as optional extra)....................................................................................................................47
29. Cleaning ....................................................................................................................................................................48
30. Maintenance..............................................................................................................................................................48
31. Door seal ...................................................................................................................................................................49
32. Error messages...........................................................................................................................................................50
33. Supply failure.............................................................................................................................................................50
34. CE Conformity Declaration .........................................................................................................................................51
35. Address and customer service .................................................................................................................................... 52
36. Index .........................................................................................................................................................................53

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This mark in the Operating Instructions means:
Watch out
Important Note!
2. General notes and safety notes
You have purchased a technically fully proven product which has been produced in Germany with the use
of high-grade materials and the application of the latest manufacturing techniques; it has been factory
tested for many hours.
In addition we guarantee the supply of spare parts over 10 years.
This mark on the product means:
Note Operating Instructions
Warning – oven hot when operating!
Observation of the Operating Instructions is necessary for faultless
operation and for any possible claims under warranty. If these
Instructions are disregarded, all claims under warranty, guarantee and
indemnification are excluded!
The right to technical modifications is reserved.
Dimensional details are not binding.
2.1 Material quality from MEMMERT:
External casing: stainless steel (V2A, Mat.Ref. 1.4301)
Piping: stainless steel (V4A, Mat.Ref. 1.4571)
Working space: stainless steel (V4A, Mat.Ref. 1.4404) featuring high stability, optimal hygienic
properties, and corrosion resistance against many (not all!) chemical compounds (warning
against chlorine compounds, for example).
Thermotrays: stainless steel (Mat. Ref. 1.4404 = V4A). The heating mat is vulcanised to the
underside of the thermotray and covered with stainless steel; it consists of Silicone rubber.
Connector between thermotray and electrical socket in rear wall: Ryton R4 (GF PPS plastics)
and PEEK-GF30
Seals in solenoid valves and electrical sockets: fluoride rubber FKM/FPM (Viton)
Door seal: Silicone rubber
The load for the vacuum drying oven must be carefully evaluated for its chemical compatibility with the
above materials.
A table listing about the compatibility of all these materials can be requested from MEMMERT.
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2.2 Transport
Always use gloves!
If the oven has to be carried, at least 2 persons are required to transport it.
2.3 Initial start-up
When the oven is started up for the first time, it should be supervised continuously until steady conditions
have been reached.
2.4 Oven load
Full consideration must be given to the physical and chemical properties of your load (e.g. combustion
temperature etc.) in order to prevent serious damage to load, oven and surroundings.
Please note that the Memmert ovens described here are not explosionproof (they do not conform to the
Industrial Association Specification VBG 24) and are therefore not suitable for drying, evaporating and
burning-in of paints, enamels or similar materials whose solvents may produce an inflammable mixture
with air. There must be no possibility of the formation of inflammable gas/air mixtures either within the
oven chamber or in the immediate surroundings of the equipment.
Large amounts of dust or corrosive fumes inside the oven chamber or in the surroundings of the equipment
may produce deposits within the oven and lead to short-circuits or damage the electronics. It is therefore
important that adequate precautions are taken against excessive dust or corrosive fumes.
In order to ensure proper air circulation inside the chamber, there must be sufficient spacing of the load
inside the oven. Do not place any load on the floor, against the side walls or underneath the ceiling of the
chamber (heating ribs). In order to ensure optimum air circulation the shelves must be so inserted that the
air spacings between door, shelf and rear chamber wall are approximately equal.
The maximum number and the loading of the shelves can be found in the table in the Section „Technical Data“.
2.5 Safety check
The door and the security glass panels must be checked regularly for scratches or damage. No vacuum
must be applied to the oven if there is any damage.

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3. Technical data
Model 200 400 500
Chamber width A [mm] 385 385 545
Chamber height B [mm] 305 385 465
Chamber depth C [mm] 250 330 400
Oven width D [mm] 550 550 710
Oven height E [mm] 600 680 760
Oven depth F [mm] 400 480 550
Width G [mm] 529 529 689
Height H [mm] 450 290 130
Depth I [mm] 383 463 533
Chamber volume [litre] 29 49 101
Weight [kg] 58 82 120
Power [W] 1200 2000 2400
Max. number of shelves 3 4 4
Max. load per shelf [kg] 20 20 20
Max. load per oven [kg] 40 60 60
Ambient conditions Ambient temperature 5°C to 40°C
rH 80% max., no condensation
Overvoltage category: II
Contamination level: 2
Setpoint temperature range 20°C to 200°C
10mbar - 1100mbar
Setting accuracy 0.5°C / 1mbar
Working temperature range From 5°C above ambient temperature up to 200°C
Leakage rate max. 0.5 x 10-2 mbar 1/sec

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3.1 Standard equipment of VO-ovens
Electronic fuzzy-supported PID process controller with permanent power matching and time-saving
auto-diagnostic system for rapid fault finding (see Section: „Error messages“)
Language selection
Alphanumerical text display
Internal report memory 1024kB for storing actual temperature, setpoint temperature, pressure
and error states with time stamp
Control of oven and documentation of actual values on MEMoryCardXL
Programme sequence control for up to 40 ramp segments
Vacuum control for digital operation of the built-in solenoid valves
Control output 24 Volt for purging and to switch off the external vacuum pump
Selectable inlet valves for fresh air and inert gas
Integral weekly programmer with group function (e.g. all workdays)
Recessing push/turn control for simple operation of oven
Visual alarm indication
Built-in sounder as alarm on overlimit, as audible signal at programme end, and to acknowledge
input (key click)
Digital monitor controller for overtemperature, undertemperature, and as automatically setpoint-
following monitor (ASF)
Mechanical temperature limiter (TB Class 1)
Monitor relay to switch off heating in case of fault
Each thermotray has a separate Pt100 DIN Class A temperature sensor for temperature
measurement and can be removed individually
Convenient integral 3-point temperature calibration
Temperature-dependent control panel venting
Parallel printer interface (PCL3 compatible)
Serial RS-232C interface for computer-supported temperature programmes and for reading the
internal report memory
MEMMERT software “Celsius 2005“ for remote operation of oven via a PC and for reading the
report memory inside the controller
A pre-formatted blank MEMoryCardXL with 32 kB storage capacity, reprogrammable for up to 40
ramp segments and additionally 270 hours report memory at 1 minute intervals
Special equipment (to be ordered separately as accessories): subframe, pump module, cable
RS232C to DIN 12 900-1, external card reader for MEMoryCardXL for connection to the PC RS232C
interface, 25-way printer cable (parallel, screened)
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Do not place the oven on a readily inflammable support surface!
WARNING! Always pull out the supply plug before
opening the oven cover!
3.2 Electrical equipment
Operating voltage see label 50/60 Hz
Current rating see label
Protection Class 1, i.e. operating isolation with ground connection to EN 61 010
Protection IP20 to EN 60 529
Interference suppression to EN55011 Class B
Oven protected by a fuse 250V/15A fast blow
Controller protected by a 100 mA fuse (200 mA on 115 V)
When connecting a MEMMERT oven to the electrical supply you have to observe any local
regulations which apply (e.g. in Germany DIN VDE 0100 with FI protection circuit)
This product is intended to operate on a supply network with a system impedance Zmax at the
transfer point (building connection) of 0.292 Ohm max. The user has to ensure that the product is
only operated on an electrical supply network which meets these requirements. If necessary, details
of the system impedance can be obtained from the local electricity supply authority.
Note:
Any work involving opening up the oven must only be carried out by a suitably qualified
electrician!
3.3 External connection
Equipment connected to the external connections must have interfaces which meet the requirements for
safe low voltage (e.g. PC, printer).
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4. Installation facilities (accessories)
The oven can be placed on the floor or on a
bench (working surface). It is important that
the oven is set up accurately horizontally; the
door may have to be adjusted (see Section:
„Maintenance“)
The spacing from the back of the oven to the
wall should be at least 15 cm. The spacing to
the ceiling must not be less than 20 cm and
that at the side to the wall not less than 8 cm.
Generally it is essential to have adequate air
ventilation around the oven.
Information on accessories will be found in our leaflet or on our internet page www.memmert.com.
Please note the installation instructions for our accessories.
4.1 Subframe
Oven models 200 to 500 can be mounted on a subframe (accessory)
4.2 Stackable version
Two ovens of the same model size can be stacked on each other. Note that the oven
with the lower working temperature must always be placed at the bottom.
Foot locators (accessory) have to be fitted on the bottom oven.
Take off cover of bottom oven
Place drill jig (supplied with foot locators) into the inverted cover at the
back
Mark holes and drill 4.2 mm dia.
Screw the foot locators to the top of the cover using the screws and nuts
supplied
Re-fit the cover
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15 cm
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8 cm
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8 cm
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20 cm
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Oven on the
floor
Oven on
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Oven on pump
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Oven on pump
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5. Oven construction and connections