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Memmert
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PM 200
User Manual
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User Manual
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Memmert PM 200, PM 400, PM 500 User Manual

OPERATING INSTRUCTIONS
Vacuum Drying Oven
VO 200 VO 400 VO 500
Pump Module
PM 200 PM 400 PM 500
1. Contents ......................................................................................................................................................................2
2.1 Safety check.......................................................................................................................................................4
2.2 Transport ...........................................................................................................................................................4
3 Installation facilities (accessories) ..................................................................................................................................5
3.1 Subframe ...........................................................................................................................................................5
3.2 Initial start-up ....................................................................................................................................................6
3.3 Oven load .......................................................................................................................................................... 6
4 Technical data ..............................................................................................................................................................7
4.1 Standard equipment of VO ovens (basic variation) .............................................................................................. 8
4.2 Electrical equipment ..........................................................................................................................................9
4.3 External connection ........................................................................................................................................... 9
4.4 Material quality from MEMMERT: ....................................................................................................................... 9
5 Oven construction and connections ............................................................................................................................10
6 Starting up ................................................................................................................................................................12
7 Switching output for external vacuum pump purge valve and pump control (option) .................................................. 13
7.1 Vacuum pump purge valve .............................................................................................................................. 13
7.2 Demand-controlled vacuum pump shut-down (option) ....................................................................................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
Setting-up example “Programme operation” .............................................................................................................. 26
PRINT
21 Printer 22 Basic oven settings
.............................................................................................................................................................29
SETUP
...........................................................................................................................................30
22.1 Real-time clock ................................................................................................................................................31
23 Temperature monitor and protection devices ..............................................................................................................32
23.1 Mechanical temperature monitor: temperature limiter (TB) ...............................................................................32
23.2 Electronic temperature monitor ........................................................................................................................ 33
MAX
23.2.1 Overtemperature protection
23.2.2 Undertemperature protection
................................................................................................................. 33
MIN
.............................................................................................................. 33
23.2.3 Adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12 880 ................................................... 34
23.2.4 Automatic temperature monitor (ASF)
AUTO
............................................................................................. 35
1. Contents
VO page 2
24 Calibration .................................................................................................................................................................38
24.1 Calibration-temperature ...................................................................................................................................38
24.2 Calibration-pressure (vacuum) .......................................................................................................................... 40
25.1 USB interface
..................................................................................................................................................................................41
25.2 Communication interface RS232C (option) .......................................................................................................42
25.3 Bus interface RS485 (option) ............................................................................................................................43
26 Log memory ..............................................................................................................................................................44
26.1 Reading the log memory .................................................................................................................................. 44
26.2 Reading the log memory into the PC via RS232C .............................................................................................. 44
26.3 Printing the log memory from the oven ............................................................................................................ 44
(only for oven models with printer ports) .................................................................................................................... 44
27.1 Programming the MEMoryCard XL from the oven ............................................................................................ 45
27.2 Programming the MEMoryCard XL from a PC with the oven .............................................................................45
27.3 Programming the MEMoryCard XL from a PC using the read-write unit ............................................................ 45
27.4 Documentation on MEMoryCard XL .................................................................................................................46
28 User-ID-Card (available as optional extra) ....................................................................................................................47
29 Cleaning ....................................................................................................................................................................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
page 3
VO
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 in the Operating Instructions means:
Watch out
Important Note!
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 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.
2.2 Transport Always use gloves! If the oven has to be carried, at least 2 persons are required to transport it.
Do not place the oven on a readily inflammable support surface!
It is important that the oven is set up accurately horizontally!
VO page 4
3 Installation facilities (accessories)
min.
20 cm
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“)
8 cm
min.
8 cm
min.
15 cm
min.
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.
3.1 Subframe Oven models 200 to 500 can be mounted on a subframe (accessory)
Oven on the
floor
Oven on
subframe
page 5
Oven on pump
module
Oven on pump
module and
subframe
VO
3.2 Initial start-up When the oven is started up for the first time, it should be supervised continuously until steady conditions have been reached.
3.3 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“.
VO page 6
4 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
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-2
mbar 1/sec
VO
4.1 Standard equipment of VO ovens (basic variation)
• 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
• Alphanumeric text display
• Internal log memory with 1024 kB for storing actual temperature, temperature setpoint, vacuum and error states with time stamp
• Control of oven and logging of actual temperature values on MEMoryCard XL
• Programme sequence control for up to 40 ramp segments
• Vacuum pressure control for digital operation of the built-in solenoid valves
• Programmable inlet valves for fresh air and inert gas
• Integrated weekly programmer with group function (e.g. all workdays)
• Recessing push/turn control for simple operation of the oven
• Visual alarm indication
• Built-in sounder as alarm if limit values are crossed, as acoustic signal at programme end and to acknowledge input (key click)
• Digital monitor controller for overtemperature, undertemperature and automatic setpoint-following monitor (ASF)
• Mechanical temperature limiter (TB protection class 1)
• Monitor relay to switch off heating in case of fault
• Each thermoshelf has a separate Pt100 DIN class A temperature sensor for temperature measurement and can be removed individually
• Convenient integral 3-point temperature and vacuum calibration
• Temperature-dependent control unit ventilation
• USB interface for computer-based temperature control programmes and to read out the controller’s internal log memory
• MEMMERT software “Celsius” for remote operation of the oven via computer and for reading the controller’s internal log memory
• A pre-formatted blank MEMoryCard XL with 32 kByte storage capacity, reprogrammable for up to 40 ramp segments and additionally 270 hours log memory with a scanning interval of one minute
Optionally available additional fittings:
• 24 volt control output for purging and switching off external vacuum pump
• Number of flange sockets (inserts) for thermoshelves: 3 instead of 2 (VO 200) or 4 instead of 2 (VO 400-500)
• Number of thermoshelves: 2 instead of 1 (VO 400-500)
• Connection of inert gas switchover via solenoid valve
• Interface for control of optional pump module
• Drip tray
• USB printer port
• Base
• Pump module
• USB cable
• External card reader for MEMoryCard XL for connection to USB interface
• Printer cable (parallel, shielded) 25-pin.
Descriptions in this manual referring to these optional additional fittings are only relevant for ovens of the corresponding version.
VO page 8
WARNING! Always pull out the supply plug before
opening the oven cover!
4.2 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 DIN 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!
4.3 External connection
Equipment connected to the external connections must have interfaces which meet the requirements for safe low voltage (e.g. PC, printer).
4.4 Material quality from MEMMERT:
• External casing: stainless steel (Mat.Ref. 1.4016)
• Piping: stainless steel (Mat.Ref. 1.4571)
• Working space: stainless steel (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).
• Thermoshelves: aluminium. The heating mat is vulcanised to the underside of the thermoshelf and
covered with stainless steel; it consists of Silicone rubber.
• Thermoshelves: stainless steel (Mat. Ref. 1.4404). The heating mat is vulcanised to the underside of
the thermoshelf and covered with stainless steel; it consists of Silicone rubber.
• Connector between thermoshelf 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.
page 9
VO
5 Oven construction and connections
12
1
2
3
10
11
4
5
6
7
9
8
VO
page 10
15
13
14
16
1 Computer connection, serial communication
interface
2 Printer connection, parallel printer port
(optional) 3 Air/gas connection IN1 4 Air/gas connection IN2 (optional) 5 Vacuum connection OUT 6 Norprene connection tube vacuum pump -
vacuum appliance 7 Vacuum pump module connection 8 Control connection for pump purging Vacuum pump (optional) 9 Mains connection pump module 10 Connecting line pump purging 11 Control connection pump purging 12 Mains connection vacuum unit 13 Flange socket 14 Thermoshelf 15 Main switch pump module 16 Vacuum pump
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6 Starting up
1. Connect the vacuum connection (5) to the vacuum pump connection (6) of the pump module or to a suitable external vacuum pump, using the Neoprene connection tubing (7) supplied with the pump module.
2. When using a pump module, the connections for the pump purge (8+11) must be linked together using the cable (10) supplied with the equipment.
3. Plug in the mains supply plugs of the supply cables (9+12).
4. If the oven is to be charged with inert gas (e.g. nitrogen) the gas cylinder must be connected only to the gas inlet IN2 (4). The maximum pressure of 1.5 bar must not be exceeded! (Use pressure reducing valve for 1.5 bar max.)
5. Push in the thermoshelves (14) as far as possible. Any thermoshelves not being used should be placed on a soft surface.
6. Close the door of the vacuum oven.
7. Switch on the main switch (15) of the optional pump module.
8. Switch on the main switch of the vacuum oven.
On first start-up do not operate
the oven unsupervised until
steady conditions have been reached!
Warning
VO page 12
7 Switching output for external vacuum pump purge valve and pump control (option)
The 3-way switched output serves to control the vacuum pump of the optional pump module (PM) of the vacuum oven (VO).
7.1 Vacuum pump purge valve When loads with a high moisture content are being dried there is a possibility during prolonged operation that the pump output decreases through condensate forming in the pump heads. The diaphragms can be blown free by briefly purging the pump heads with fresh air. This improves the effectiveness of the drying process.
2
1
3
Note:
In conjunction with the optionally available pump modules PM 200, PM 400 and PM 500 this cyclic purge takes place automatically as the pump performance deteriorates.
Decisive advantage:
The drying process takes place more rapidly and with reduced energy consumption, the wear on the pump is reduced. This function can be de-activated by removing the pump purge connecting cable at the back of the unit.
Pin connections of the socket on the back of the unit:
1 output purge valve
GND (switched) 2 24V DC 3 pump switch-off
GND (switched)
7.2 Demand-controlled vacuum pump shut-down (option) After the end of a drying programme, or after prolonged operation with any vacuum demanded by the controller, the vacuum pump incorporated in the pump module (PM) is switched off via the control line.
Note:
A control signal switches off the vacuum pump incorporated in the optional pump module (PM). The signal lamp in the main switch of the pump module remains alight even when the vacuum pump has been switched off via the control line.
Decisive advantage:
The demand-controlled shut down of the vacuum pump reduces energy consumption and increases the life of the vacuum pump by reducing the wear on the pump diaphragms. This function can be de-activated by removing the pump purge connecting cable at the back of the unit. The vacuum pump is then running continuously.
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8 Loading and Inertgas
• The load must only be placed on the thermoshelves.
• Slide in the thermoshelves up to the stop.
• Do not dry or heat any load which releases fumes developing an inflammable mixture in combination with air.
• Provide optimum heat transfer from the thermoshelf to the load. Ensure that the load rests properly on the tray.
• For maximum number of trays and load capacity of the thermoshelves see the Table Technical data.
• The table below gives recommendations for the appropriate loading of the trays which in turn is essential for a largely uniform temperature distribution inside the oven.
Safety note:
When the oven is being operated with inert gas (nitrogen, helium, neon, argon, krypton) there is a small escape of the gas used into the environment. The list of MAK values (maximum workplace concentration) and of BAT values (biological workplace tolerance values) does not contain any information concerning the inert gases mentioned above. It is however still important to ensure good ventilation of the room. The appropriate specifications of the trade association publication „Guidelines for the Laboratory“ (ZH1/119) as well as DIN 1946 Part 7 „Room Air Technology (VDI Ventilation Rules)“ should be observed.
Precautions when handling gas cylinders:
• Avoid any open fire in the area near the gas cylinders. Inert gas is not combustible, but it is
possible for the cylinder to burst.
• Store cylinders below 50°C in a well ventilated location. Prevent ingress of water and any return
flow into the cylinder.
• Connect up the gas cylinder only through a pressure reducing valve (1.5 bar max.).
• When not in use, close the shut-off valve.
• The instructions and safety information of the gas supplier have to be observed.
VO page 14
9 Guidelines for evaporating liquids in Memmert-vacuum ovens
• Do not heat liquids in closed vessels.
• In order to prevent condensation in the working space, heat liquids using a drying programme
(with venting cycles).
• In order to prevent excessive condensation in the working space, working temperature and venting
cycles should be chosen to suit the moisture content of the load.
• Do not heat any liquids releasing fumes which form an inflammable mixture with air.
• During the evaporation of liquids with a large surface area it is possible that the cooling produced
during evaporation may result in the set temperature not being reached.
The oven described in these Operating Instructions
must never be used for drying or heating of loads
releasing fumes which may form an
inflammable mixture in combination with air!
The ovens described here must never be operated
in areas with a hazardous atmosphere!
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VO
10 Controls and indications
time
display
operating mode
indication
Tu
Mo
on
off
text display
Sa Su
Fr
Th
We
t1
push/turn control
SET key chip card reader
(main switch)
t3
t2
set
11 Operating the door
thermoshelves
4
t4
3
loop
2
1
SETUP
PRINT
on
off
push
STERI DEFRO
card
°C
display
MIN
AUTO
alarm indication
pressure displaytemperature
IN 1
°C
MAX
OUT
IN 2
%
mb
IN 1
rh
OUT
IN 2
2
CO mb
monitor temperature
indication
close
The door is opened by pulling on the door handle. The door is closed by the door handle being pushed in.
12 Switching on
The oven is switched on by pressing the push/turn control.
Oven switched off. The push/turn control is pushed in and protected against damage.
Oven switched on and can be operated using the push/turn control and the SET key.
open
close
13 Setting the temperature
Hold down the SET key and set the temperature setpoint with the push/turn control. After the SET key has been released the display briefly flashes the temperature setpoint. The display then changes to the actual current temperature and the controller starts to control to the selected temperature setpoint.
VO
page 16
open
14 Quick venting function
The quick venting function is used in unloading and loading the vacuum oven without having to alter the selected vacuum setpoint:
1. Rotate control anticlockwise and select OPENDOOR in the menu.
2. For rapid venting of the vacuum oven, press SET key.
3. The vacuum oven is vented automatically to atmosphere so that the door can be opened.
4. To evacuate the vacuum oven to the most recently selected vacuum setpoint, press the SET key
again.
15 Status indication for the heating levels
Heating tray symbol
lights up as soon
as a heating tray is
inserted
4
Heating symbol
lights up as soon
3
2
1
as this level is
heated
page 17
VO
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