RUMED 3000 Manual

Apparatus for Phone: ++49/511/824015
Scientific and ++49/511/824016
Industrial Research Fax: ++49/511/824017
Rubarth Apparate GmbH
Mergenthalerstrasse 8, D-30880 Laatzen, Germany
OPERATING AND
MAINTENANCE INSTRUCTIONS
FOR
COOLED INCUBATORS
TYPE 3000 - 3500
Version E/30-35/12-94

-3-
12-94
Table of Contents
Page
1 General View 4
2 General 5
3 Transportation and Storage 5
4 Installation 5
5 Power Supply 6
6 Operation 6
7 Temperature Control 8
7.1 Temperature Controller 8
7.2 Setpoint Control 8
7.3 Programme Control 8
7.4 Programmable Timer for Alternating Temperatures 9
7.5 Example for a Dual Setponit Daily Programme 12
7.6 Example for a Dual Setpoint Weekly Programme 14
8 Temperature Protection 18
8.1 Specimen Protection 18
8.2 Unit Protection 19
9 Lighting 20
10 Adjustment of lighting intensity 21
11 Humidification 22
11.1 Evaporative Humidification 22
11.2 Ultrasonic Humidification 23
11.3 Dehumidification 26
12 Service and Maintenance 27
Concerning the basic unit, please refer to the extra-bold printed chapters.
All further chapters are belonging to options.
Deutsch Diese Bedienungsanleitung ist erhältlich in Deutsch. Version D/30-35/12-94
Français Ce mode d'emploi est disponible en Français. Sur demande!

-4-
12-94
ON
dhm
Prog.
1 2 3 4 5 6 7
% rel.F.
C
o
W2
Gruppe I
Light-Intensity
Helligkeitssteuerung
Befeuchtung Entfeuchtung Temperaturwählbegrenzer Kühlung
Cooling
Umluft
Air-circulation
Heizung
Heating
Steckdose
Plug socket
Luftumwälzung
Temperature Unit cut-out
Aircirculation
DehumidificationHumidification
Hand/Auto Gruppe II
Zeitschaltuhr Beleuchtung
Timer Light
Group I Group II Manual/Auto
40
45
11
12
13
14
15
16
17
18
19
20
21
22
23
0
10
9
8
7
6
5
20
10
0
10
20
3040
50
60
C
-
+
Rubarth Apparate GmbH
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
2
3
Lighting
(Chapter 9) Specimen Protection (Chapter 8.1) Temperature Control (Chapter 7)
Control of Lighting
Intensity (Chapter 10) Humidification and Dehumidification (Chapter 11) Adjustable Air Circulation (Chapter 6) Safety cut-out (4 Amps) for test room socket (Chapter 6)
Programmable Timer
(Chapter 7.4)
Vor Reparaturen am Apparat diesen vom Stromnetz trennen
Prior to repairs disconnect unit from mains
Made in Europe
Typ
Type
Refrigerant
Kältemittel
Nr.
Zul. Betriebsüberdruck
Admissible working
overpressure
No.
Filling Weight
Füllgewicht
Volt
kg
kW A
bar
Hz
Model
Baujahr
Rubarth Apparate GmbH
Mergenthalerstraße 8, D-30880 Laatzen, Germany
12
1 General View
Control Panel
Nameplate
The nameplate is located in the
upper left edge of the door
frame. In case of failures or for
spare-part orders, please indi-
cate the unit type (1) and the
serial no. (2).

-5-
12-94
2 General
Rumed cooled incubators are producing ideal thermal conditions for quality control and research in science
and industry. Experiences of almost 50 years stand for a maintenance-free construction and result in longevity.
Cooled incubators are fabricated for two different temperature ranges and three unit sizes each can be chosen
from. The options alternating temperature control and programme control, lighting and humidification increase
the unit's universal applicability. Depending on equipment, the units are applicated in zoology, botany,
microbiology, bacteriology, medicine as well as in the artificial aging and testing of electric and electronic
components.
3 Transportation and Storage
The standard domestic shipment of the unit will be effected unpacked in a van. The unit should be
transported carefully in standing position. In case a short-time tilting of the unit should be unavoida-
ble, for reasons of f. ex. passing doors, it might be possible that oil of the cooling machine will enter
into the evaporator. This oil must flow back to the cooling machine. For this reason take care that
after transportations the unit should not be started before expiration of 4 hours. The unit is recommen-
ded to be stored in dry rooms at temperatures between +10°C and +30°C. The shipment within
European countries is mostly effected in stable cartons on a palette. Seaworthy and air-freight cases
are generally conserved for 12 months and the units are welded in an aluminium wrapping. Conden-
sation due to passing of different climatic zones is avoided by drying agent bags which are to be
removed prior to initial starting of the machine.
4 Installation
Model Volume [l] Exterior Dimensions [mm] Maximum load per
Insertion Grid (kg)
Height Width Depth
3000 180 1420 (1520)*610 620 40
3100 250 1840 (1940)*610 620 40
3200 390 1725 (1825)*760 750 50
3300 170 1000 (1100)*760 780 (980)** 25
3400 260 1920 (2020)*690 770 (970)** 25
3500 500 2160 790 800 (1000)** 25
* changed height with option movable design
** changed depth with option ultrasonic humidification

-6-
12-94
22
17
Torsion-protectio
n
(lifted up)
Foot adjustment
to the bottom
Foot adjustment
to the top
block
break release break
• Installation places being exposed to direct sunlight, radiators and other thermal sources are to be avoided.
Insufficiently ventilated rooms and room temperatures exceeding +25°C are also unsuitable.
• The distance between the wall and the backside of the unit should be at least 10 cm. Do not cover the
ventilation slots; even a partial covering of the slots may lead to a heat accumulation.
Uncovered ventilation slots are very important for a faultless operation of the cooling machine!
• The floor of the installation place should be even and horizontal. Slight unevennesses can be balanced by
the adjustable foots of the unit.
• Units being equiped with the option "Ultrasonic Humidification" must be installed in such a way, that the test
room bottom is in level position to ensure a correct drain of water.
Model Type of foots Tool
3000/3100/3200 2 adjustable foots
on the front
fork wrench SW22
(width: 22mm)
3300/3400 4 adjustable foots fork wrench SW17
(width: 17mm)
3500 4 adjustable foots Slide torsion protecting tube
upwards and turn foot by hand
by a multiple of 90°
Option movable
design
not adjustable

-7-
12-94
The unit is not explosionproof!
Do not store explosive or easily inflammable substances in the test room!
5 Power Supply
• Current (A.C.) and voltage at the installation place must coincide with the indications on the name-plate of
the unit. The name-plate can be found at the upper part in the door frame on the left side.
• Connection is to be made to a duly earthed socket (a separately secured socket is recommended).
A multitude of units are equiped with combined universal plugs according to the German or French
standard.
6 Operation
It is recommended to clean the interior of the unit before starting. Refer to the details described in "Defrosting"
and "Cleaning" (chapter 12).
Open the door widely for removal of the insertion grids. The grids must be charged in such a way that a
circulation of the air will not be hindered.
The white rocker switch "Circulating Air" starts the fan and the unit at the same time. Cooling machine and
heating are locked by means of this switch and will be only started when the fan is in operation. On operation
of the fan the white pilot lamp is lighting.
In case the fan is fitted with a potentiometer, the air quantity can be reduced by turning the control knob to the
left.
The red rocker switch "Heating" and the blue rocker switch "Cooling" are to be switched-on.
The refrigerating machine will only start when cooling capacity is requested. On demand of cooling, the
temperature controller switches to the cooling circuit by means of a solenoid valve, and when there is no
request for cooling, it switches to the bypass-circuit. Should the period where no cooling is requested
exceed 3 minutes, the refrigerating machine will be switched-off. The blue pilot lamp will only light-up on request
of cooling capacity (cooling circuit is switched-on), the pilot lamp "heating" will only light-up on request of
heating capacity.
The test room socket (option) is switched-on by means of the yellow rocker switch ("plug socket") and the pilot
lamp is lighting. The test room socket can be charged by max. 4 Amps. In case of an overload or a failure of the
connected unit, the safety cut-out being located next to the switch on the right side will be released. Upon
repair of the failure, the pin of the safety cut-out shall be pressed down again.

-8-
12-94
C
o
W2
Heating ON Cooling ON
Setpoint
Increase Value
Selector Key
Actual Value
Decrease Value
Programme Runs
(if W2 is lighting)
7 Temperature Control
7.1 Temperature Controller
Functioning
The digital temperature controller
can be used as constant value
controller or, with optional acces-
sories, as programme controller.
Temperature sensor is a Pt 100
resistance thermometer, class A.
Further technical details can be
drawn from the PHILIPS Operating
Instructions No. 9499 040 21601.
7.2 Setpoint Control
The temperature controller keeps the test room temperature constant on an adjusted value. Actual value and
setpoint are displayed simultaneously on two different digital displays being located upon another. The upper
digits indicate the actual value, the lower digits the setpoint. The setpoint value can be decreased or increased
by pressing the keys and .
7.3 Programme Control
The option dual setpoint daily programme is achieved by configuration of the temperature controller as
programme controller. This option offers the possibility of a change between two temperatures with
programmable values for the temperature variation speed (ramps). The programme can be started at any
desired moment by the switching command (1 ON) of the timer. The switching command (1 OFF) terminates the
programme. The moment for the switching command OFF results from the running time of the programme.
During the programme cycle "W2" is displayed.
The timer can be operated in the switching modes "Auto", "Permanent ON" and "Permanent OFF". For
programme control, the timer must be switched to position "Auto". For a commutation to setpoint control, the
timer must be switched to "Permanent OFF". The controller will then be operated as setpoint controller and all the
programmed parameters will be kept in the controller as well as in the timer.
As soon as the timer is commutated again to "Auto", the programme control is reactivated (See chapter 7.4
"Programme Timer for Alternating Temperature" -> "Change of Switching Status").

-9-
12-94
ON
dhm
Prog.
Time/Response time
Weekday (7=Sunday)
Hours setting
Weekday setting
Time setting
Program entry/recall
Response time number of
the weekday indicated
(1 ON, 1 OFF, 2 ON usw.)
The point indicates
permanent Control
ON or OFF
Indication of actual
switch position/
switching command
Minutes setting
Override control and
permanent control
1234567
7.4 Programmable Timer for Alternating Temperatures
General
The digital timer can be operated in the operating modes "daily programme" and "weekly programme". It is
recommended to programme the daily reiterating day-/night temperature change in the operating mode "daily
programme". (The small triangle in the display must aim to 1->7; if not, the "weekly programme" of the timer is
activated. Change of the operating mode is effected by a reset of the timer.
Reset of the Timer and Selection of the Mode "Daily Programme"
Please observe the following four steps exactly for starting the timer in the daily programme mode.
+++
d
m
ON
OFFOF
F
1234567
Press the four keys simultaneoulsy to reset the timer (can be read
at the display)
- none -
OFFOF
F
1234567
Let the keys loose, and the display test will be finished
+
h
OFFOF
F
1234567
Press and hold the key with the clock sign and set the actual
hour by means of the key h.
(our example: 13)
+
m
OFFOF
F
1234567
Press and hold the key with the clock sign and set the actual
minutes by means of the key m.
(our example: 48)
After having entered the actual time, let the key with the clock sign loose and the timer will run.
Change-over from Summer- to Winter Time
+
d
h
press keys simultaneoulsy, and time is put on by an hour (summer time)
+
d
m
press keys simultaneously, and time is put back by an hour (winter time)

-10-
12-94
Change of the Switching Status
OFFOF
F
1234567
Clock indicates the actual time
(f. ex. 13.48 h) Switching status is "Automatic OFF"
+
m
ON
1234567
Press and hold key m and press key Hand once. The switching
status will change-over to "PERMANENT ON"
(display indicates a point above ON)
OFFOF
F
1234567
Press and hold key m and press key Hand once. The switching
status will change-over to "PERMANENT OFF"
(display indicates a point above OFF)
OFFOF
F
1234567
Press and hold key m and press key Hand once. The switching
status will again change-over to "AUTOMATIC" (point disappears)
Daily Programme
When the mode "daily programme" is activated, maximum 6 ON- and 6 OFF-commands can be
programmed. However, for one programme cycle only 1 ON- and 1 OFF-command is required. The
command ON starts the programme, the command OFF terminates the programme. At the same time,
a programme reset is effected in the temperature controller, which is the only possibility for a further
programme start.
Correspondingly, the time delay between an OFF-command and the next ON-command must be at
least 1 minute, otherwise the programme reset cannot be effected and the programme controller will
not change to the next programme cycle (i. e. in the operating mode "daily programme" it is possible to
run a four-hour programme cycle six times per day maximum).
The following table shows the programming of the response times for our dual setpoint programme
example.
Programming On- and Off-Commands (Operating Mode "Daily Programme")
OFFOF
F
1234567
Clock indicates the actual time
(f. ex. 13.48 h)
Prog.
ON
1234567
Press once, to call the programming mode
(Here: f. ex. not yet programmed)
or
h
m
ON
1234567
Enter time for the command 1 ON by means of the keys h
and m(Here: f. ex. 6.00 h)
Prog.
OFFOF
F
1234567
Press once, to call the command 1-OFF
(Here: f. ex. not yet programmed)
or
h
m
OFFOF
F
1234567
Enter time for the command 1 OFF by means of the keys h
and m(Here: f. ex. 21.00 h)
Prog.
There are no further switching commands required for our example
programme! If requested, all other switching commands can be called
successively on pressing the key Prog.
(2 OFF, 3 ON, 3 OFF, 4 ON, 4 OFF, 5 ON, 5 OFF, 6 ON, 6 OFF ☛after 6 OFF, 1 ON 1 OFF etc. will be repeated)
OFFOF
F
1234567
Press once, to terminate the programming mode and to
return to the normal display (If there will be no entry within 30 sec., the
display will automatically return to actual time).

-11-
12-94
A correct execution of the programme is based on the condition, that only the required
ON-/OFF-commands have been programmed. When you are not sure, if you have programmed
unintentionally switching commands which are not required and which may disturb the programme flow,
you can visually check the commands by calling them on the display.
Display of the Programmed ON-/OFF-Commands
OFFOF
F
1234567
Clock indicates the actual time
(f. ex. 13.48 h)
Prog.
ON
1234567
Press once, to call the programming mode. The command
1 ON will be displayed (Example programmed to 6.00 h)
Prog.
OFFOF
F
1234567
Press once, to call the command 1-OFF
(Example programmed to 21.00 h)
Prog.
ON
1234567
Press once, to call the command 2-ON
(Here: f. ex. not yet programmed)
Prog.
If requested, all other switching commands can be called successively on
pressing the key Prog.
(2 OFF, 3 ON, 3 OFF, 4 ON, 4 OFF, 5 ON, 5 OFF, 6 ON, 6 OFF ☛after 6 OFF, 1 ON 1 OFF etc. will be repeated)
OFF
1234567
Press once, to leave the display mode and to return to the
normal display (If there will be no entry within 30 sec., the display will
automatically return to actual time).
Modifying or Cancelling the Programmed ON-/OFF-Commands
OFFOF
F
1234567
Clock indicates the actual time
(f. ex. 13.48 h)
Prog.
ON
1234567
Press the key PROG several times until the switching command
to be modified is displayed (Example: press 3 times to call 2
ON)
or
h
m
ON
1234567
Modify the desired time by means of the keys h and m
(Here: f. ex. modification to 22.45 h)
ON
1234567
or delete the command 2-ON by pressing the keys h and m
simultaneously
Prog.
Further switching commands to be modified or deleted are called by means
of the key PROG and can be modified or deleted according to the above
mentioned procedure.
OFFOF
F
1234567
Press once, to terminate the programming mode and to
return to the normal display (If there will be no entry within 30
sec., the display will automatically return to actual time).

-12-
12-94
Dual Setpoint Daily Programme
0
5
10
15
20
25
30
35
C
o
120 min 660 min 120 min
SP2
Pt2 Pt3 Pt4
SP
SP3
SP4 SP
Test Room
Temperature
Excess Temperature
Control TWW
Low Temperature
Control TWW
Programme
START Programme END
10 234 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 hour of the day
ON
1234567
OFF
1234567
ONOFF OFF
Switching Status of
Programme Timer
(=SP)
(=SP3)
7.5 Example for a Dual Setpoint Daily Programme
Segment
Function Night
Temperature Heating Day
Temperature Cooling Night
Temperature
SP (0C)
Pt (min)
Switching
Command Timer
ON
1234567
OFFOF
F
1234567
Switching Status OFF ON OFF
The moment for the command 1 OFF is calculated: time end + time start + Pt2 + Pt3 + Pt4,
i. e. our example: 6.00h+120min+660min+120min=6.00h+15h(3hp.m.) = 21.00 h (9 h p.m.)
ATTENTION: If the time for the instruction OFF had not been chosen correctly, the programme might
be aborted!

-13-
12-94
Entry of Programme Data
or Adjustment of value SP
(acc. to our example: 20 °C)
Push key until SP2 is displayed
or Adjustment of value SP2
(acc. to our example 30 °C)
Push once, Pt2 will be displayed
or Adjustment of value Pt2
(acc. to our example 120 min)
Push once, SP3 will be displayed
or Adjustment of value SP3
(acc. to our example 30 °C)
Push once, Pt3 will be displayed
or Adjustment of value Pt3
(acc. to our example 660 min)
Push once, SP4 will be displayed
or Adjustment of value SP4
(acc. to our example 20 °C)
Push once, Pt4 will be displayed
or Adjustment of value Pt4
(acc. to our example 120 min)
Push once, SP5 will be displayed
Adjustment of value SP5 (is not required for our example - so
press key until ---- will be displayed)
Push once, Pt5 will be displayed
Adjustment of value Pt5 (is not required for our example - so
press key until ---- will be displayed)
After approx. 30 sec. waiting time, the controller switches automatically to the display setpoint/actual
value! (If this occurs unintenionally during data entry, repeat the procedure from the beginning).

-14-
12-94
7.6 Example for a Dual Setpoint Weekly Programme
Most of the temperature programmes with a duration of less than 24 h can be realized in the operating
mode "daily programme". However, a programme with for example a duration of 36 h, an reiterating
cycle of 16 h, or a programme execution on defined week-days is only possible in the operating mode
"weekly programme". The operating mode of the clock (timer) can be changed by a reset of the timer.
Reset of the Timer and Selection of the Mode "Weekly Programme"
Please observe the following five steps exactly for starting the timer in the weekly programme mode.
+++
d
m
ON
OFFOF
F
1234567
Press the four keys simultaneoulsy to reset the timer
(can be read at the display)
- none -
OFFOF
F
1234567
Let the keys loose, and the display test will be finished
+
d
OFFOF
F
1234567
Press and hold the key with the clock sign and set the actual
day by means of the key d
1=Monday, 2=Tuesday usw. (our example 5 for friday)
+
h
OFF
1234567
Press and hold the key with the clock sign and set the actual
hour by means of the key h.(our example: 13)
+
m
OFFOF
F
1234567
Press and hold the key with the clock sign and set the actual
minutes by means of the key m.(our example: 48)
After having entered the actual time, let the key with the clock sign loose and the timer will run in
the operating mode "weekly programme".
In the operating mode "Weekly Programme", each 4 ON- and 4 OFF-comands can be programmed. For
either of these switching commands the week-day for execution is to be programmed (random
selection, i. e. any desired combination of week-days is possible).
For programming of the timer, as for ex. change-over from summer- to winter time, or calling or deleting
of switching commands, refer to chapter "Programmable Timer for Alternating Temperatures". Observe,
that programming of the ON-/OFF-commands requires programming of the respective week-days for
execution of the commands.

-15-
12-94
Dual Setpoint Weekly Programme
0
-5
5
10
15
20
25
30
35
40
45
50
C
o
Test Room
Temperature
Excess Temperature
Control TWW
Low Temperature
Control TWW
0
18 6
12 18
06
12 18
06
12 18
06
12 18
06
12 18
0 Uhr
ON ON ON ON ON ON ON
OFF
OFF OFF OFF OFF OFF OFF OFF
Switching Status of
Programme Timer
Programme Cycle
SaturdayFriday Sunday Monday Tuesday Wednesday
Dual Setpoint Weekly Programme (1st Cycle)
0
-5
5
10
15
20
25
30
35
40
45
50
C
o
Pt3 = 270 min Pt5 = 300 min
Pt2 = 30 min
Setpoint Jump
Pt4 = 60 min
SP2 SP2
SP3
SP4 SP5
SP
SP
Test Room
Temperature
Excess Temperature
Control TWW
Low Temperature
Control TWW
Programme
START Programme
END
10 234 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
hour of the day
ON ON OFF OFF
Switching Status of
Programme Timer
Saturday
ON
1234567
OFF
1234567
ON
1234567
Our following example describes the programming of a complicated weekly programme. Our example
uses a 16 h-cycle being repeated 7 times running. Programming of the parameters for the temperature
controller corresponds to the programming described in the chapter "Dual Setpoint Daily Programme".
Programming of the switching commands for the timer are explained subsequently to the example.
Note: Just as in the operating mode "daily programme", the switching commands for the clock cannot
be executed retroactively!

-16-
12-94
Segment
Function Normal
Temperature Heating Heat Load Cooling Refrigerating Load
Normal
Temperature
SP (0C)
Pt (min)
Switching
Command Timer:
ON
1234567
Cycle: + +
OFFOF
F
1234567
ON
1234567
Cycle: +
OFFOF
F
1234567
ON
1234567
Cycle: +
OFFOF
F
1234567
Switching Status of
Timer OFF ON OFF
Execution of 7 cycles with 4 different ON- and OFF-response times each is only possible by the summarization
of switching commands (so-called blocking). In our example only 3 ON- and OFF-response times each are
required, because the programme is symmetric to 48 h (3 * 16h = 48 h).
The required ON-switching commands (sunday: 6.00 h, monday: 6.00 h and wednesday: 6.00 h) are
summarized to one timer switching command 1-ON.
This summarization (blocking) offers the possibility of rather complex programmes (same time for different
week-days ☛only 1 switching command).
To avoid a premature programme start on termination of programming or during programming of a
complicated programme, the timer can be switched to manual mode.
Change of the Switching Status
OFFOF
F
1234567
Clock indicates the actual time (f. ex. 13.48 h)
Switching status is "Automatic OFF"
+
m
ON
1234567
Press and hold key mand press key Hand once. The switching
status will change-over to "PERMANENT ON" (display indicates a
point above ON)
OFFOF
F
1234567
Press and hold key mand press key Hand once. The switching
status will change-over to "PERMANENT OFF" (display indicates a
point above OFF)
OFFOF
F
1234567
Press and hold key mand press key Hand once. The switching
status will again change-over to "AUTOMATIC" (point disappears)

-17-
12-94
Programming, Modifying or Deleting ON-/OFF-commands (Weekly Programme)
OFFOF
F
1234567
Clock indicates the actual time
(f. ex. 13.48 h)
Prog.
ON
1234567
Press the key PROG several times until the switching command
to be modified is displayed (Example: press once to call 1 ON)
or
d
ON
1234567
Press key donce, and a flashing arrow will be displayed above
1. Position this arrow above the desired week-day for execution
of the switching command using key d. Acknowledge by means
of the key Hand, and the arrow will stop flashing. Press key dfor
selection of further week-days where switching commands are
to be executed and acknowledge by pressing key Hand.Ifthe
flashing arrow will be positioned above an already programmed
arrow, this arrow will be deleted automatically, or the already
programmed arrow can be acknowlegded by pressing key
Hand. Programming of the week-days with switching commands
is correct, when all the desired week-days are marked with a
non-flashing arrow.
or
h
m
ON
1234567
Programme the command 1-ON to the desired time by means
of the keys hand m.
(Here : f. ex. 6.00 h)
ON
1234567
or delete the command 1-ON by pressing keys hand m
simultaneously and repeat programming of the week-day.
Prog.
Use key Prog. for selection of possibly desired further switching commands to be
programmed or deleted and refer to the above description.
OFFOF
F
1234567
Press once, to terminate the programming mode and to return
to the normal display (If there will be no entry within 30 sec., the display will
automatically return to actual time).
Execution of the programme will only be effected, if the clock is in position "Automatic". If the clock had been
switched to "Permanent OFF" for programming, switch-over to "Automatic" for programme execution.

-18-
12-94
20
10
0
10
20
3040
50
60
C
-
+
Rubarth Apparate GmbH
1
8 Temperature Protection
8.1 Specimen Protection
The unit is equiped with a freely adjustable temperature
selector control (TWW) for protection of the specimen to be
tested. The temperature controller avoids any deviation
from the ajusted temperature range possibly occuring due
to malfunction. In case of overtemperature or insufficient
temperature, the TWW switches-off the cooling machine
and all thermal sources (as circulating fan, lighting,
humidification and socket). As long as there is an
overtemperature or insufficient temperature in the test
room, an acoustic signal warns from supercooling or
superheating. Reconnnection is effected automatically
when the test room temperature reaches the preadjusted
temperature range. The acoustic alarm can be
switched-off by the main switch or by decreasing the value
of the insufficent temperature limitation or by increasing the value of the overtemperature limitation.
The limit values of the temperature range being adjusted at the temperature selector control should always be
5°C below respectively above the temperatures being adjusted at the temperature controller.
Temperature blue pointer red pointer
Setpoint Control +23 °C +18 °C +28 °C
Programme control +20 °C/+30 °C +15 °C +35 °C
Adjustment of the Temperature Range:
• Unscrew the cover anticlockwise
• Set the blue pointer with the key side (1) to the desired value of the low temperature
disconnection by turning the green ring
• Set the red pointer with the key side (2) to the desired value of the overtemperature
disconnection by turning the brass screw
• Screw on the cover after having adjusted

-19-
12-94
60
3
1
2
Any manipulation on this protection device or the mounting of a fuse with
a higher releasing temperature than +60 °C will destroy the unit and will
result in a loss of guarantee claims.
8.2 Unit Protection
The unit is equiped with an overtemperature protection. The measuring sensor is located
in the rear test room on the right side below the ceiling. In case of overtemperature the
fuse (3) bursts. The unit remains switched-off and an acoustic alarm is released
additionally.
Replacement of the Fuse:
• Hold fast the shaft (1) and unscrew the knurled screw (2).
• Carefully remove the glass splinters out of the knurled screws (2) by knocking.
• Insert the spare fuse with a releasing temperature according to the figure in the margin
into the knurled screw (2). The releasing temperature is marked on the shaft of the fuse
(3).
• Hold fast the shaft (1) and jam in the knurled screw (2) against the spring pressure until
the thread gets hold and screw it on.
After response of the unit protection and prior to a new start of the unit, possible failures
should be detected.

-20-
12-94
Gruppe I Hand/Auto Gruppe II
Zeitschaltuhr Beleuchtung
Timer Light
Group I Group II Manual/Auto
1
2
3
45
50
11
12
13
14
15
16
17
18
19
20
21
22
23
0
10
9
8
7
6
5
9 Lighting
General
The lighting can be switched in two groups
(standard) to reach different luminous intensity
values (Exception: If only 1 lamp is mounted, it will
be switched over group I and the switch for
group II will be of no function). A photoperiod
can be run by means of the timer.
Adjustment of the Actual Time
• Detach de plastic cover
• Adjust the actual time ( here 13.18 h = 01.18
p.m.) by means of the turning knob in
clockwise direction. Hours can be read at the
arrow of the outer scale and minutes on the
arrow of the inner scale
Programming of the Switching Times
• Light ON - Set the green nose at the desired
switching-on time
(here: 08.00 h = 08.00 a.m.)
• Light OFF - Set the red nose at the desired
switching-off time (here: 18.00 h=
06.00 p.m.)(spare slid set with 4 pcs. spare slids
can be found in timer at the upper edge on
the right side)
• Reattach the plastic cover
Operating Mode Switch Position
Steady burning light Switch (2) in position hand (position I)
Photo period Switch (2) in position automatic (position 0)
Light intensity Switch (1) Switch (3)
No lighting Position 0 Position 0
Group I ☛50% Position I Position 0
Group II ☛50% Position 0 Position I
Group I + Group II ☛100% Position I Position I