Memmert VO COOL 200, VO COOL 400 Operating Instructions

Vacuum oven with Peltier cooling

VO COOL 200 VO COOL 400

Pump Module

PM 200 PM 400

OPERATING INSTRUCTIONS

VO Cool

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PRINT

SETUP

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MAX

MIN

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AUTO

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VO Cool

This mark in the Operating Instructions means:

Watch out

You have purchased a technically fully proven product which has been produced in Germany with the use

This mark on the product means:

Warning – oven hot when operating!

The right to technical modifications is reserved.

The door and the security glass panels must be checked regularly for scratches or damage. No vacuum

Always use gloves!

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page 5

min. 15

cm

min. 8

cm

min. 8

cm

min. 20

cm

The oven can be placed on the floor or on a

(see Section:

„Maintenance“)

The spacing from the back of the oven to the

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When the oven is started up for the first time, it should be supervised continuously until steady conditions

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Width G [mm]

Weight [kg]

Vacuum oven

Ambient conditions

Ambient temperature 5°C to 40°C

Working temperature range

mbar 1/sec

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Alphanumeric text display

Vacuum pressure control for digital operation of the built-in solenoid valves

Visual alarm indication

Temperature-dependent control unit ventilation

A pre-formatted blank MEMoryCard XL with 32 kByte storage capacity, reprogrammable for up to 40

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WARNING! Always pull out the supply plug before

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.

Any work involving opening up the oven must only be carried out by a suitably qualified

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).

The load for the vacuum drying oven must be carefully evaluated for its chemical compatibility with the

A table listing about the compatibility of all these materials can be requested from MEMMERT.

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Vacuum pump (optional)

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a suitable external vacuum pump, using the Neoprene connection tubing (8) supplied with the

pump module.

together using the cable (12) supplied with the equipment.

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.)

Turn on the CDP Peltier cooling unit (3)

Warning

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2

1

3

page 13

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.

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.

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.

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)

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The load must only be placed on the thermoshelves.

combination with air.

on the tray.

When the oven is being operated with inert gas (nitrogen, helium, neon, argon, krypton) there is a small

The list of MAK values (maximum workplace concentration) and of BAT values (biological workplace

The appropriate specifications of the trade association publication „Guidelines for the Laboratory“ (ZH1/119)

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.

flow into the cylinder.

When not in use, close the shut-off valve.

The instructions and safety information of the gas supplier have to be observed.

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(with venting cycles).

cycles should be chosen to suit the moisture content of the load.

during evaporation may result in the set temperature not being reached.

The oven described in these Operating Instructions

The ovens described here must never be operated

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set

off

on

push

card

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

STERI DEFRO

°C

rh

%

2

IN 1

IN 2

OUT

IN 1

IN 2

OUT

MIN

AUTO

MAX

mb

The oven is switched on by pressing the push/turn control.

After the SET key has been released the display briefly flashes the temperature setpoint. The display then

open

close

The door is opened by pulling on the door handle.

The door is closed by the door handle being pushed in.

(main switch)

open

close

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The quick venting function is used in unloading and loading the vacuum oven without having to alter the

in the menu.

again.

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PRINT

SETUP

After holding down the SET key (approx. 3 sec), the current operating mode flashes on the display. A

After the SET key has been released the controller operates in the new operating mode.

After an operating mode has been selected, all relevant controller settings are shown simultaneously on

A parameter (menu item) can be selected by rotating the push/turn control; all other parameters are then

The selected parameter flashes brightly and can now be altered with the push/turn control while holding

After the SET key has been released the newly set value is stored.

Weekly

operation

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18 Normal operation

PRINT

SETUP

In this operating mode the oven operates continuously. The settings for operating the oven can be selected. The settings act directly on the operation of the oven.

STERI DEFRO

°C

rh

%

IN 1

IN 2

OUT

IN 1

I

MIN

AUTO

MAX

mb

By rotating the push/turn control the following parameters can be selected and can be altered as described in the Section „Setting the parameters“:

Temperature setpoint Range: 5°C to 90°C Optionally -5°C to 90°C Note: If operating temperatures below room temperature are not required: Turn off the CDP Peltier cooling unit.

°C

Temperature monitor Adjustment range: MIN MAX AUTO

(see Section: “Temperature monitor“)

MIN

MAX

AUTO

°C

Pressure setpoint Range:

5mb to 1100mb LO = valve OUT permanently open

mB

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The unit should cool down to 6° C and be evacuated to 500 mb. The monitoring function should respond

Temperature

Pressure mb

Time

20 °C

0 °C

5 °C

After holding down the SET key (approx. 3 sec), the current operating

After the SET key has been released the controller is in

PRINT

SETUP

After the SET key has been released the oven briefly flashes the

The display then changes to the actual temperatureand the controller

°C

Turn the push/turn control clockwise until the overtemperature display

MAX

10°C

MIN

AUTO

MAX

C

After releasing the SET key the oven briefly flashes the vacuum setpoint.

The display then shows the actual pressure and the control starts to

mB

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PRINT

SETUP

While the weekly programmer is in the OFF phase the oven is in standby mode. Heating and fan are

The sequence of the weekly programmer is repeated every week.

A maximum of 9 time blocks, each consisting of ON time and OFF time, can be programmed.

Mo

Tu

We

Th

Fr

Sa

Su

h

o

o

Section “Setting the parameters“

Weekday

Mo

Tu

We

Th

Fr

Sa

Su

weekend Sa-Su

Mo

Tu

We

Th

Fr

Sa

Su

Mo

Tu

We

Th

Fr

Sa

Su

----

on

off

to

hrs.

on

off

h

on

off

h

When the controller is in stand-by mode or if the weekly programmer is in the ON phase, the temperature

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The oven (VO500) has to switch on at 07.30 hrs from Mo to Fr (workday group) and switch off at 18.00

Mo

Sa

Fr

Th

We

Tu

Su

After holding down the SET key (approx. 3 sec) the current operating

After the SET key has been released the controller is in operating mode

PRINT

SETUP

Turn the push/turn control anticlockwise to select the symbols “Mo-Fr

7:30

Sa

Su

off

Mo

Tu

We

Th

Fr

h

on

18:00

Sa

Su

on

Mo

Tu

We

Th

Fr

h

off

10:00

Mo

Tu

We

Th

Fr

Su

off

Sa

h

on

14:00

Mo

Tu

We

Th

Fr

Su

on

Sa

h

off

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PRINT

SETUP

an existing programme can be edited

After EDIT

has been activated, the following parameters can be selected and can be altered as

Section “Selecting the parameters“:

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

°C

MAX

°C

h

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

°C

MAX

°C

h

to

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PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

MAX

°C

h



rh





IN1

IN2

U T

1

minute to

hours

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

MAX

h

°C

mb

IN 1

IN 2

OUT

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

MAX

h

°C

mb

IN 1

IN 2

OUT

Vacuum at the end of the ramp segment

Adjustment range:

10

1100

mbar or

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

MAX

h

°C

mb

IN 1

IN 2

OUT

(see Section: „Closure commands for ramp segments“)

PRINT

SETUP

loop

t3

t4

t2

t1

on

off

Mo

Tu

We

Th

Fr

Sa Su

MAX

h

°C

mb

IN 1

IN 2

OUT

Turn the push/turn control clockwise unti

appears on the display, briefly press the SET key to enter

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Wait until the setpoint temperature is reached.

The oven only starts the next programme segment when the programmed

Wait until the set vacuum has been reached.

The oven starts the next programme segment only when the programmed

Wait until temperature setpoint and vacuum setpoint have been

The oven starts the next programme segment only when the programmed

the programmed vacuum have been reached,

The set programme is repeated after passing through all programmed

1-99

= repeats

= continuous repeat function

The programme segments are linked together by the segment closure command. These commands

°C

Ramp

closure

command

ramp

segment 1

spwt (t)

segment 1

closure

command

ramp

segment 2

command

ramp

segment 4

command

ramp

segment 5

end

closure

command

ramp

segment 3

spwt (t)

segment 3

segment 1

segment 5

segment 4

delayed

programme start

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The oven has to heat up on Monday at 8.00 hrs, and after reaching the temperature be evacuated to 50

After holding down the SET key (approx. 3 sec) the current operating

After the SET key has been released the controller is in operating mode

PRINT

SETUP

After the SET key has been released, the controller is in the programme

Mo

Tu

We

Th

Fr

Sa

Su

using the push/turn

h

Turn the push/turn control further clockwise until the time of the first

using the push/turn

h

Turn the push/turn control clockwise until the temperature display is

using the push/turn control.

°C

1050

mB

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Turn the push/turn control to the right until the INLET display flashes.

Turn the push/turn control clockwise until a segment closure command

) appears.

using the push/turn

h

Turn the push/turn control clockwise until the temperature display is

using the push/turn control.

°C

mB

Turn the push/turn control to the right until the INLET display flashes.

Turn the push/turn control clockwise until a segment closure command

) appears.

with the push/turn control.

using the push/turn

h

Turn the push/turn control clockwise until the temperature display is

using the push/turn control.

°C

mB

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Turn the push/turn control to the right until the INLET display flashes.

Turn the push/turn control clockwise until a segment closure command

) appears.

with the push/turn control.

using the push/turn

h

Turn the push/turn control clockwise until the temperature display is

using the push/turn control.

°C

1050

mB

Turn the push/turn control to the right until the INLET display flashes.

Turn the push/turn control clockwise until a segment closure command

) appears.

with the push/turn control.

Turn the push/turn control clockwise until

appears on the display.

Turn the push/turn control clockwise and set the temperature monitor.

(see Section: “Temperature monitor”)

MIN

AUTO

MAX

˚C

Turn the push/turn control anticlockwise until the stop symbol

is

with the push/turn control.

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PRINT

SETUP

VO ovens may be equipped with a parallel printer interface, as used in personal computers.

This parallel printer interface on the back of the oven is suitable for connecting conventional PCL3-

The controller is provided with an internal log memory

(see Section: „Log memory”).

The report data can

When using a colour printer, the various graphics can be printed in colour.

Section Setting the parameters.

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SETUP

PRINT

SETUP

The following parameters can be selected by turning the push/turn control, and altered as described in the

Section „Setting the parameters“

The winter/summer time changeover does not take place automatically

h

The controller incorporates a calendar which automatically allows for

Weekday

Mo

Tu

We

Th

Fr

Sa

Su

Year

to

Audible signal at programme end

or

Audible signal on alarm, e.g. overtemperature

OFF

or

to 15

(see Section: „Communication interface”)

Tolerance margin ASF

to

(see Section: „Temperature monitor”)

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GERMAN, English, franCEAIS, ESPANOL

Vent connection select IN1 or IN2 (option)

or

to

(see Section: „Calibration“)

to

(see Section „Calibration“)

The real-time clock is set in SETUP and includes date and clock time.

The real-time clock serves for documentation according to GLP.

The clock runs with a buffer battery independently of the mains power supply.

The built-in lithium battery Type CR 2032 has a life of approx. 10 years.

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The monitoring temperature is measured in the combined heating and cooling sheet by a PT100 temperature

The oven is provided with duplicate overtemperature protection (mechanical / electronic) according to DIN 12 880.

MIN

MAX

AUTO

°C

All ovens of the VO series are equipped with a mechanical temperature limiter (TB)

up as warning

The oven is again ready for operation only after it has cooled down and after the fault has been

(TWW, TWB)

Audible

Automatic

TWB-alarm

ASF-alarm

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MAX

MIN

MAX

AUTO

˚C

MAX

MIN

The low alarm cannot be programmed

Where no undertemperature protection is

MIN

MAX

AUTO

°C

MIN

The temperature monitor can be set independently of the operating mode.

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The manually set monitor temperature and the electronic overtemperature protection are monitored on

VO-ovens by an adjustable temperature monitor (TWW) Protection Class 3.1 to DIN 12 880:

MAX

is exceeded, the TWW takes over the control of the

is

TB approx. 20°C above Tmax

TWW set manually

setpoint temperature

t

°C

controller fault

emergency operation

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page 35

AUTO

A monitoring device which automatically follows the selected temperature setpoint.

The tolerance margin of the ASF is set in SETUP

(see the menu item Tolerance margin ASF in the Section

„Basic oven settings SETUP“).

Automatic temperature

MIN

MAX

AUTO

°C

using

Automatic temperature

MIN

MAX

AUTO

°C

using

The tolerance margin for the ASF is selected in SETUP

(see the menu item Tolerance margin ASF in the

Section „Basic oven settings SETUP”).

Tolerance margin reached = ASF activated

The ASF is automatically activated when the actual temperature has reached 50% of the selected tolerance

The activation of the automatic temperature monitor is indicated by the bright

AUTO

70°C

50°C

ASF Alarm

ASF active

ASF activated

70°C

50°C

ASF activated ASF activated

40°C

20°C

0°C

20°C

40°C

60°C

80°C

ASF set to

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Triggering the ASF alarm is indicated by flashing

AUTO

and

-symbol.

70°C

50°C

ASF Alarm

ASF active

ASF activated

70°C

50°C

ASF activated ASF activated

40°C

20°C

0°C

20°C

40°C

60°C

80°C

Again within tolerance margin = ASF alarm switched off

The automatic temperature monitor alarm is switched off automatically as soon as the selected tolerance

70°C

50°C

ASF Alarm

ASF active

ASF activated

70°C

50°C

ASF activated

40°C

20°C

0°C

20°C

40°C

60°C

80°C

ASF set to

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page 37

70°C

50°C

ASF Alarm

ASF active

ASF activated

70°C

50°C

ASF activated ASF activated

40°C

20°C

0°C

20°C

40°C

60°C

80°C

ASF set to

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correction to 0.0°C.

reference instrument.

calibration correction setting has to have a negative sign.

to 40.0°C in SETUP and set the corresponding calibration

correction to 0.0°C.

operation for a setpoint temperature of 40°C.

to –0.4°C.

a further calibration temperature can be programmed below

, and with

an

additional calibration temperature above

CAL 1

+0,5°C

CAL 3

+0,8°C

CAL 2

-0,4°C

Factory calibration

40°C

0°C

80°C

10°C

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h

°C

h

°C

h

°C

page 39

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A positive or a negative calibration correction can be applied to each selected calibration point.

correction has to be set with a negative sign.

The procedure can be performed for up to 3 calibration vacuum pressures.

in SETUP to 500mb and set the corresponding calibration

correction to

of 497 mbar is measured using a reference gauge.

in SETUP to

can be programmed with

with

CAL 1 +5mB

CAL 3

+8mB

CAL 2

-3mB

Factory

calibration

900mB

500mB

0mB

200mB

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h

mB

h

mb

mB

h

mB

page 41

When all the calibration corrections are set to 0mb, the oven is restored to the factory

Vacuum calibration

Vacuum calibration adjustment

The chamber is fitted by default with a USB interface in accordance with the USB specification. With this

The chamber must be given a unique device address in the SETUP submenu, menu item

The maximum cable length is 5 m.

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The oven is provided as standard with a serial communication interface RS232C according to

This is the address through which the PC communicates with the oven. The default setting is

The maximum cable length is 15 m.

RS 232-C

9-pin serial

12345

69 8 7

TXD

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page 43

When so ordered, the oven can be equipped at the factory with an RS485 interface instead of the RS232C

The system is operated using the “Celsius 2007” software. A unique device address has to be assigned to

A maximum of 16 devices can be addressed on the RS485 bus. A termination resistance of 220 Ohm has

RS 485

9-pin serial

12345

69 8 7

A

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The controller continuously records all relevant measurements, settings and error messages at 1-minute

The internal log memory is arranged as a ring memory, i.e. the new data always overwrite the oldest report

The report function can not be switched off but remains active at all times. The data are stored in the controller,

The size of the internal log memory is 1024kB. This corresponds to a memory capacity of approximately 6

The log memory of the controller is not altered or cleared by the reading procedure.

(see Section: „Printer“)

The GLP data header is automatically included in the print-out: it contains the following information:

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A temperature programme with up to 40 ramps can be programmed on the MEMoryCard XL. Programming

Where a MEMoryCard XL is programmed, it can be read only on the same oven type for which it has been

The text field of the MEMoryCard XL can be marked individually with text or diagram.

The selected settings are written directly to the card and stored on it. After the card has been removed, the

(see Section: „Communication

interface“).

Write protection:

The MEMoryCard XL can be provided with write protection using the PC program “Celsius 2007”. The

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The programme remains stored on the MEMoryCard XL after the card has been removed from the unit. It

The actual temperatures can be documented continuously on the MEMoryCard XL while the programme is

A certain amount of storage space is provided for documentation depending on the programme duration.

The sampling rate is set automatically by the controller depending on the programme duration.

With a programme duration up to 270 hours the documentation of the actual values on the MEMoryCard

XL takes place with a 1-minute cycle. With programmes of longer duration the sampling time is extended

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page 47

access authority card

Name:

ID:

_____________________

The User-ID-Card stores the serial number of the oven and a unique user number in encrypted format. The

The blockage through the User-ID-Card is indicated by the illuminated key symbol

on the control

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The metal surfaces of the oven can be cleaned with commercially available cleaning agents for stainless

The control panel, the plastic input modules and other plastic components of the oven must not be

Any work involving opening up the oven must only be carried out by a suitably qualified

A well-closing door is essential on an oven. On Memmert ovens, tight closure of the door is ensured by a

The top part (1) of the door hinge can, after releasing

the 2 screws (2) at the top or bottom of the door, be

moved slightly in the direction of the arrow.

The door can be adjusted after releasing the socket

screw (3) and rotating the excentric (4) by means of

a screwdriver. NOTE ! Screw (3) is locked with locking

varnish. It can be released by a sharp tug using a

hexagon socket key. Apply more locking varnish to

screw (3) and tighten it.

The closing panel (6) can also be adjusted in the direction of

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page 49

The areas indicated should always be dusted with

Talcum powder

Talcum

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The coolant container (arrow) is

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page 51

Thermoshelf does not heat up, yellow

Temperature limiter activated

See Section: „Mechanical temperature monitor: temperature limiter (TB)”

Appliance does not cool down

As far as VO appliances are concerned, error messages are shown in the alphanumeric display.

When dealing with the service department always quote the product serial number on the oven label.

After a supply failure the operation is continued with the set parameters. The instant and duration of the

After a supply failure lasting less than 60 minutes the current programme is continued at the point where

Temperature

VO Cool

EC Declaration of Conformity

Manufacturer´s name and address: MEMMERT GmbH + Co. KG

Äußere Rittersbacher Straße 38

D-91126 Schwabach Product: Vacuum-drying-oven Type: VO … Sizes: 200 / 400 / 500 Nominal voltage: AC 230 V 50 / 60Hz

The designated product is in conformity with the European EMC-Directive

2004/108/EEC

including amendments

Council Directive of 03 May 1989 on the approximation of the laws of the Member States relating to

electromagnetic compatibility.

Full compliance with the standards listed below proves the conformity of the designated product with the essential protection requirements of the above-mentioned EC Directive:

DIN EN 61326:2004-05 EN 61326:1997

EN 61326/A1:1998 EN 61326/A2:2001 EN 61326/A2:2003

The designated product is in conformity with the European Low Voltage Directive

2006/95/EEC

including amendments

Council Directive on the approximation of the laws of the Member States relating to Electrical

equipment for use within certain voltage limits.

Full compliance with the standards listed below proves the conformity of the designated product with the essential protection requirements of the above-mentioned EC Directive:

DIN EN 61 010-1 (VDE 0411 part 1):2002-08 EN 61 010-1:2001 DIN EN 61 010-2-010 (VDE 0411 part 2-010):2004-06 EN 61 010-2-010:2003

Schwabach, 03.07.08

______________________________

(Legally binding signature of the issuer)

This declaration certifies compliance with the above mentioned directives but does not include a property assurance. The safety note given in the product documentation which are part of the supply, must be observed.

EC Declaration of Conformity

Manufacturer´s name and address: MEMMERT GmbH + Co. KG

Äußere Rittersbacher Straße 38

D-91126 Schwabach Product: Peltier cooling unit Type: CDP Sizes: 115 Nominal voltage: AC 230 V 50/60 Hz

alternative AC 115 V 50/60 Hz

The designated product is in conformity with the European EMC-Directive

2004/108/EEC

including amendments

Council Directive of 03 May 1989 on the approximation of the laws of the Member States relating to

electromagnetic compatibility.

Full compliance with the standards listed below proves the conformity of the designated product with the essential protection requirements of the above-mentioned EC Directive:

DIN EN 61326-1:2006-10 EN 61326-1:2006 DIN EN 61000-3-11:2001-04 EN 61000-3-11 :2000

The designated product is in conformity with the European Low Voltage Directive

2006/95/EEC

including amendments

Council Directive on the approximation of the laws of the Member States relating to Electrical

equipment for use within certain voltage limits.

Full compliance with the standards listed below proves the conformity of the designated product with the essential protection requirements of the above-mentioned EC Directive:

DIN EN 61 010-1 (VDE 0411 part 1):2002-08 EN 61 010-1:2001 DIN EN 61 010-2-010 (VDE 0411 part 2-010):2004-06 EN 61 010-2-010:2003

Schwabach, 03.06.09

______________________________

(Legally binding signature of the issuer)

This declaration certifies compliance with the above mentioned directives but does not include a property assurance. The safety note given in the product documentation which are part of the supply, must be observed.

VO Cool

This product is subject to the Directive 2002/96/EC by the European

Address and customer service

When contacting customer service, always quote the product serial number on the oven label.

VO Cool

page 55

ASF 29

N

waiting time 17

TB 26

TWW 34

W

wall bracket 9

weekday 15

weekly programmer 15

08/2017

VO Cool englisch

D32806

Memmert VO COOL 200, VO COOL 400 Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual