Hermle Z 207 MK User manual

© Hermle Labortechnik GmbH Z216MK_V2.19_eng
HERMLE Z 207 MK
User Manual

CONTENTS
© Hermle Labortechnik GmbH Z207MK_V1.21_eng I
1. PRODUCT DESCRIPTION .................................................................................................. 1
1.1 Safety Instructions .............................................................................................................................................1
1.2 Intended Purpose ...............................................................................................................................................1
1.3 Brief Description.................................................................................................................................................1
1.4 Delivery Package ................................................................................................................................................1
1.5 Installation of the Centrifuge .............................................................................................................................2
1.5.1 Unpacking the Centrifuge.................................................................................................................................2
1.5.2 Space Requirements........................................................................................................................................2
1.5.3 Installation ........................................................................................................................................................2
1.6 Signs and Indications of the Centrifuge...........................................................................................................3
1.6.1 Product Nameplate(Example) ..........................................................................................................................3
1.6.2 Warning and Information Signs........................................................................................................................4
1.7 Operating and Display Elements.......................................................................................................................5
1.7.1 LED light..........................................................................................................................................................5
1.7.2 LCD-Display .....................................................................................................................................................6
1.7.3 Danger, Precautions and Warranty ..................................................................................................................7
1.7.4 Following Rules Must Strictly be Adhered To:..................................................................................................7
1.7.5 Warranty...........................................................................................................................................................8
1.8 Basic Adjustments .............................................................................................................................................8
1.8.1 Adjustment of the Rotor Type...........................................................................................................................8
1.8.2 Access to Mode: "Operating Data"...................................................................................................................9
1.8.3 Temperature Indication...................................................................................................................................10
1.8.4 Signal Turn On / Off (optional)........................................................................................................................10
1.8.5 Keyboard Sound Turn On / Off (optional).......................................................................................................11
1.8.6 Retrieving Operating Data..............................................................................................................................12
2. OPERATION...................................................................................................................... 13
2.1 Mounting and Loading the Angle Rotor .........................................................................................................13
2.1.1 Installation of Rotors.......................................................................................................................................13
2.1.2 Loading Angle Rotors.....................................................................................................................................13
2.1.3 Loading and Overloading of Rotors................................................................................................................14
2.1.4 Removing the Rotor .......................................................................................................................................14
2.2 Lid ......................................................................................................................................................................15
2.2.1 Lid Release ....................................................................................................................................................15
2.2.2 Lid Lock..........................................................................................................................................................15
2.3 Pre-Selection.....................................................................................................................................................16
2.3.1 Pre-Selection of Speed / RCF-Value..............................................................................................................16
2.3.2 Pre-Selection of Running Time.......................................................................................................................16
2.3.3 Pre-Selection of Brake Intensity and Acceleration.........................................................................................17
2.3.4 Pre-Selection of Temperature ........................................................................................................................18
2.3.5 Pre-Cooling ....................................................................................................................................................18
2.4 Radius Correction.............................................................................................................................................19
2.5 Program.............................................................................................................................................................19
2.5.1 Storage of Programs ......................................................................................................................................19
2.5.2 Recall of Stored Programs .............................................................................................................................20

CONTENTS
II Z207MK_V1.21_eng © Hermle Labortechnik GmbH
2.5.3 Leaving Program Mode..................................................................................................................................21
2.5.4 Starting the Centrifuge....................................................................................................................................21
2.5.5 The "STOP" Key.............................................................................................................................................21
2.6 Imbalance Detection.........................................................................................................................................22
3. MAINTENANCE................................................................................................................. 23
3.1 Maintenance and Cleaning...............................................................................................................................23
3.1.1 General Care:.................................................................................................................................................23
3.1.2 Cleaning and Disinfecting of the Unit .............................................................................................................24
3.1.3 Cleaning and Disinfecting of the Rotor...........................................................................................................24
3.1.4 Disinfection of Aluminum Rotors ....................................................................................................................25
3.1.5 Disinfection of PP-Rotors ...............................................................................................................................25
3.1.6 Glass Breakage..............................................................................................................................................25
3.2 Lifetime of Rotors, Round and Rectangular Buckets, Accessories............................................................. 26
4. TROUBLE SHOOTING ...................................................................................................... 27
4.1 Error Message: Problem / Solution.................................................................................................................27
4.2 Survey of Possible Error Messages and Solutions.......................................................................................27
4.2.1 Lid Release during Power Failure (Emergency Lid Release).........................................................................27
4.2.2 Description of the Error Message System......................................................................................................28
4.2.3 Procedure while error 14 ................................................................................................................................28
5. RECEIPT OF CENTRIFUGES TO REPAIR ....................................................................... 29
6. TRANSPORT, STORAGE AND DISPOSAL...................................................................... 30
6.1 Transport...........................................................................................................................................................30
6.2 Storage ..............................................................................................................................................................30
6.3 Disposal............................................................................................................................................................. 30
7. APPENDIX............................................................................................................................ I
EG - Conformity Declaration .....................................................................................................................................II
Table 1: Technical Data ...........................................................................................................................................III
Table 2: Permissible Net Weight..............................................................................................................................IV
Table 3: Lowest Temperatures at Max. Speed ........................................................................................................IV
Table 4: Max. Speed and RCF-Values for Permissible Rotors ................................................................................IV
Table 5: Acceleration and Deceleration Times.........................................................................................................IV
Table 6: Error Messages...........................................................................................................................................V
Table 7: Radius Correction ......................................................................................................................................VI
Table 8: Abbreviations used.....................................................................................................................................VI
Redemption Form / Decontamination Certificate ....................................................................................................VII

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 1
1. PRODUCT DESCRIPTION
1.1 Safety Instructions
This symbol indicates safety instructions and points of potential dangerous situations. Before using
the centrifuge for the first time, please read the operating manual.
Failure to follow these instructions can result in personal injury and/or property damage.
Intended use includes: the observation of all instructions, in the instruction manual, and
administering inspection and maintenance.
1.2 Intended Purpose
This Hermle centrifuge was designed only for the separation of materials or mixtures with different
densities, specifically for the preparation and processing of samples, from the human body, in
context of an in-vitro-diagnostic use, to allow the use of in-vitro-diagnostic in accordance to its'
intended purpose. The designated device and its' accessories listed, in the technical documentation,
are in compliance with Directive 98/79/EC for In-Vitro-Diagnostic Medical Devices.
Hermle Centrifuges are intended exclusively for indoor use and for the use of qualified personnel.
Only Hermle original rotors and accessories should be used. Any other use or intended use is strictly
prohibited. For any resulting damage, the company, Hermle Labortechnik, is not liable.
1.3 Brief Description
The unit type Z 207 MK is a refrigerated microlitre centrifuge, which we offer in two voltage
variations 230V or 120V.
The centrifuge can be used with different angle rotors.
All parameters are accessible via buttons, and selected with the control field. All pre-selected and
current values will be shown, permanently, on the LCD-Display.
The centrifuge is powered by a Maintenance-Free Induction Motor.
Detailed technical data are in, Table 1: "Technical Data", (see APPENDIX P.III).
1.4 Delivery Package
•1 Centrifuge Z 207 MK
•1 User Manual Z 207 MK
•1 Rotor key
•1 Power Cord
Rotor(s) / Accessories will be packaged either inside the centrifuge or separately.

PRODUCT DESCRIPTION
2Z207MK_V1.21_eng © Hermle Labortechnik GmbH
1.5 Installation of the Centrifuge
1.5.1 Unpacking the Centrifuge
Model Z 207 MK is supplied in a carton.
Remove the strap retainer, open the carton, and remove the padding.
Lift the centrifuge on both sides (see Figure 1) with an appropriate number of helpers and place it on
the laboratory table.
Attention! Do not lift the centrifuge from under the lid or by the front panel!
Figure 1
The instruction manual must be kept with the centrifuge, at all times!
1.5.2 Space Requirements
The centrifuge should be installed on an even, solid surface, if possible on a laboratory cabinet /
table or some other solid vibration free surface.
During centrifugation, the centrifuge must be placed in a way, that there is a minimum space of
30 cm/11.81in on each side of the unit, according to EN 61010-2-020 standards.
Do not place the centrifuge next to a window or a heater where it could be disposed to excessive
heat, as the performance of the unit is based on an ambient temperature of 23°C/73.4°F.
1.5.3 Installation
Follow These Steps:
•Check whether the power supply corresponds with the one specified on the manufacturer's rating
label, mounted on the rear panel.
•The power connection for the centrifuge requires a separate one-site protection, with 16 A (Type K)
•In case of emergency, there must be an emergency switch off installed outside of the room, in order
to disconnect the power supply from the unit.
•Connect the centrifuge, with the mains.
(The socket for the power cord must be easy to reach, respectively easy to disconnect).
Switch on, by using the mains power switch (I).
Open the lid, by using the button LID.
• Remove the transport securing device of the motor.

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 3
1.6 Signs and Indications of the Centrifuge
1.6.1 Product Nameplate(Example)
Company Address:
Hermle Labortechnik GmbH, Siemensstr. 25, D-78564 Wehingen
In-Vitro-Diagnostic Medical Device
TYPE:
Type Designation of the Product
REF:
Order No. of the Product
SN:
Serial No. of the Product
Manufacturer
Date of Manufacture
MAX. Drehzahl:
Max. Speed Allowed of the Unit
KIN. EN.:
Max. Kinetic Energy with Corresponding Roto
U/I/f:
Allowable Voltage / Max. Current / Frequency
P:
Electrical Input Power
Operating Manual Indication
Instructions for Disposal
Labeling, Standards and Guidelines
RoHS Conformity

PRODUCT DESCRIPTION
4Z207MK_V1.21_eng © Hermle Labortechnik GmbH
1.6.2 Warning and Information Signs
Attention! Check the fastening of the rotor nut before each run
Take off mains plug before opening the housing or the emergency
release
Power Input
Direction of Rotation –clockwise rotation for the rotor drive
Biohazard Warning

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 5
1.7 Operating and Display Elements
Figure 2
1central adjuster Run Parameters
20-I Power Switch
3LCD Control Panel Display
4rpm/rcf Speed/ g-force
5 accel/decel Acceleration / Deceleration Intensity
6time Centrifugation Time
7 lid Lid Release
8quick Short Running
9start Start Centrifugation
10 stop Stop Centrifugation
11 prog Retrieving Stored Programs
12 store Program Store
13 temp Temperature Indication
14 LED light Shows the status of the centrifuge
1.7.1 LED light
The LED light indicates the current operation state of the centrifuge. The following table shows all
operating states.
Color of LED light
Operating state
Green
Run complete, lid is closed
Yellow
Lid opened, no sleep mode
Red flashing fast
Error message
Red flashing slow
Centrifuge runs
Yellow flashing slow
Sleep mode
Red –Green flashing slow
Standard settings menu

PRODUCT DESCRIPTION
6Z207MK_V1.21_eng © Hermle Labortechnik GmbH
1.7.2 LCD-Display
The following picture shows the individual elements of the LCD-display.
Figure 3
Display Fields:
A-1 Display Field –"rpm/rcf"
A-2 Display Field –"acc/dec"
A-3 Display Field –"time"
A-4 Display Field - "temp"
Messages/Logos of the Display Fields:
M1 "close" M8 "decel" M15 "precool"
M2 "open" M9 "radius"
M3 "rotor" M10 "program"
M4 Rotor-No. M11 "error"
M5 "rpm" M12 "service"
M6 "rcf" M13 h m s
M7 "accel" M14 "temperature"
Indication:
After switching on the centrifuge, the display, "rpm/rcf"(A-1) shows the loading status, the current
software version and finally the model type (e.g. Z 36 HK).
Figure 4

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 7
1.7.3 Danger, Precautions and Warranty
This device may only be operated by a trained professional. Carefully, read the
operating manual and be familiar with the functions of the device.
To protect people and the environment, the following precautions must be taken:
•During centrifugation, the presence of people and the arrangement of hazardous materials is
strictly prohibited, within 30 cm/12 in around the centrifuge, according to the regulations of
EN 61010-2-020.
•The HERMLE Z 207 MK, is a non "explosion-proof" and must not be operated in explosion-
endangered areas or locations. Centrifugation of flammable, explosive, radioactive, or such
substances, which chemically react with high energy, is strictly prohibited. If used in such
environment, this is at the users own expense.
•Never spin toxic or pathogenic material without adequate safety precautions, i.e.
centrifugation of buckets / tubes with or without defective hermetic sealing, is strictly
prohibited. The user is obliged to perform appropriate disinfection procedures, in case
dangerous substances have contaminated the centrifuge and/or its' accessories. When
centrifuging infectious substances, always pay attention to the General Laboratory
Precautions. If necessary, contact your safety officer!
•It is prohibited to run the centrifuge, with rotors not manufactured for this unit.
•Under no circumstances open the lid of the centrifuge, while the rotor is still running or
rotating with a speed of > 2m/s
1.7.4 Following Rules Must Strictly be Adhered To:
•Do not operate the centrifuge if not installed correctly.
•Do not operate the centrifuge when dismounted (e.g. without housing).
•Do not run the centrifuge, if mechanical or electrical assembly groups have been tampered
with, by unauthorized personnel.
•Do not use accessories such as rotors and buckets, that are not approved by HERMLE
Labortechnik GmbH, except commercially available centrifuge tubes, made of glass or
plastic.
•Do not spin extremely corrosive substances, as they may cause material damages and impair
mechanical resistance.
•Do not operate the centrifuge with rotors or buckets, that show any signs of corrosion or
mechanical damage.
The manufacturer is responsible for safety and reliability, of the centrifuge, only if:
•The unit is operated in accordance to this instruction manual.
•Modifications, repairs or other adjustments are performed by HERMLE-authorized personnel
and the electrical installation of the related location corresponds to the IEC-regulations.

PRODUCT DESCRIPTION
8Z207MK_V1.21_eng © Hermle Labortechnik GmbH
1.7.5 Warranty
The centrifuge has been subjected to thorough testing and quality control. In the unlikely case of any
manufacturing faults occurring, the centrifuge and rotors are covered by warranty, for a period of two
years, from date of delivery. This warranty becomes invalid in any case of mishandling, damage
and/or negligence and further in any case of usage of inappropriate spare parts and / or accessories
or unauthorized modification of the unit.
Technical modification rights are reserved, by the manufacturer, in regards to technical
improvement!
1.8 Basic Adjustments
1.8.1 Adjustment of the Rotor Type
Before the first operation resp., after each rotor change, choose the respective rotor type. On the
rotor, find each rotor type in the printed order number.
Example:
Angle Rotor 221.59 V02 ≙rotor type "221.59"
Switch on the unit and open the lid. Press simultaneously the keys, “lid “ (7) and “quick” (8). In the
display, “rpm/rcf” (A-1), appears the previous chosen rotor type, i. e. “221.59”. Now the buttons can
be released.
With the control field (1), choose the used rotor now, (see Figure 5). To select the data, in the unit,
please press the, “start” (9) key. Inside the display (A-1), the confirmation appears as. “store”.
Now, all important rotor parameters are stored.
Figure 5
Attention: Set rotor must always match with the used rotor, otherwise damage may occur to
the unit.
The rotor type can be checked, during the run, by pressing the key, "lid" (7).

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 9
1.8.2 Access to Mode: "Operating Data"
At commissioning of the centrifuge, you have the options to make the following basic changes:
-Temperature Indication in °C or °F
-Acoustic Signal Turn on / off
-Keyboard Sound Turn on / off
-Sleep mode setting
The following operating data can be retrieved in this menu:
-Number of Starts
-Operating Hours of Centrifuge
-Operating Hours of Motor
-Software Version
-Error List
-Function of the Imbalance Switch
-Operation of Keyboard
-Hardware Version
-Intermediate Circuit Voltage in Volt
-Update touch control panel (only for service engineers)
If the centrifuge is still turned off, press the keys, "time" (6) and "lid" (7) simultaneously, turning on
the main switch of the centrifuge. Now release both keys. As a result, a display test is administered
for approx. 5 seconds. All possible indications will appear at the same time (see Figure 6).
Figure 6
ATTENTION:
-The normal program mode can be changed back again by switching off the centrifuge, for a
short period!
-All changed settings must be confirmed by the key “store” or “start” (9). A confirmation screen
will appear with the word, “store”, in the display “rpm/rcf” (A-1) - Only then the pre-selections are
valid (see Figure 7)!

PRODUCT DESCRIPTION
10 Z207MK_V1.21_eng © Hermle Labortechnik GmbH
Figure 7
1.8.3 Temperature Indication
Proceed as illustrated, under point 1.8.1, to enter this program mode, press the key "accel/decel" (5).
In the display, "accel/decel" (A-2) appears the word, "service". Select the letter, "C", with the control
field (1). As a result, appearing in the display, "rpm/rcf" (A-1) are the words, " °C ". By pressing the
key, "rpm/rcf" (4), the word " C/tEmP " flashes, this allows you to change the display into Fahrenheit
" °F ", with the control field (1), (see Figure 8).
After the settings have been stored by user (see 1.8.2), the normal program mode can be changed
back again by switching off the centrifuge, for a short period.
Figure 8
1.8.4 Signal Turn On / Off (optional)
Proceed as illustrated, under point 1.8.1, to enter this program mode, press the key; "accel/decel"
(5). In the display, "accel/decel" (A-2) flashes the word, "service". Select the letter, "L" with the
control field (1). As a result, appearing in the display "rpm/rcf" (4), are the words, "On Sound". By
pressing the key, "rpm/rcf" (4), the word "On" flashes, and the sound can be switched off with the
control field (1), (see Figure 9).
After the settings have been stored by user, the normal program mode can be changed back again
by switching off the centrifuge, for a short period.
2
3
2
3

PRODUCT DESCRIPTION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 11
Figure 9
1.8.5 Keyboard Sound Turn On / Off (optional)
Proceed as illustrated, under point 1.8.1, to enter this program mode, press the key, "accel/decel"
(5). In the display; "accel/decel" (A-2) flashes the word, "service". Select the letter, "b" with the
control field (1). As a result, appearing in the display, "rpm/rcf" (A-1), the word "ON/BEEP". By
pressing the key, "rpm/rcf" (4), the keyboard sound (On) or (Off) can be turned on, with the control
field (1), (see Figure 10).
After the settings have been stored by user (see 1.8.2), the normal program mode can be changed
back again by switching off the centrifuge, for a short period.
Figure 10

PRODUCT DESCRIPTION
12 Z207MK_V1.21_eng © Hermle Labortechnik GmbH
1.8.6 Retrieving Operating Data
In the function, "Basic Adjustments", retrieving the operating data of the centrifuge is an available
option. Please proceed as illustrated, under point 1.8.1, to enter this program mode, press the key,
"accel/decel" (5). In the display, "accel/decel" (A-2) flashes the word, "service".
With the control field (1), the following information can be retrieved:
A = Previous Starts of the Centrifuge
H = Previous Operating Hours
h = Running Time of the Motor
S = Software Version
E = List of Previous Error Message
F = Function of the Imbalance Sensor
P =Operating of Keyboard
d =Hardware version
U =Intermediate Circuit Voltage in Volt
The list of the last 99 error messages can be reviewed by pressing the key, "rpm/rcf" (4) and scroll
through, with the control field (1). The respective error codes appear in the display, "rpm/rcf" (A-1)
(see Figure 11). The first two numbers indicate the appeared errors ongoing from 00 to 99, the last
two numbers indicate the error code. Please refer to “Table 6: Error Messages", (see APPENDIX
P.V).
Switch off the centrifuge, to return to the normal program mode.
Figure 11

OPERATION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 13
2. OPERATION
2.1 Mounting and Loading the Angle Rotor
2.1.1 Installation of Rotors
Clean the drive shaft and the collet with a clean, grease-free piece of cloth. Place the rotor onto the
drive shaft, (see Figure 12). Please be sure that the rotor is fully installed onto the motor shaft.
Figure 12
Figure 13
Hold the rotor with one hand and secure the rotor to the shaft, by turning the fixing nut clockwise.
Tighten the fixing nut with the provided Allen key, (see Figure 13).
ATTENTION:
For safety, always ensure that the rotor nut is tightened before each run!
Do not operate the centrifuge with rotors or adapters that show any signs of corrosion or
mechanical damage.
Do not operate with extremely corrosive substances, which could damage the rotor and the
centrifuge.
2.1.2 Loading Angle Rotors
Rotors must be loaded symmetrically and with equal weight, (see Figures 16 and 17). The adapter
may only be loaded with the appropriate vessels. The weight differences between the filled vessels
should be kept as low as possible. Therefore, we recommend to weigh with a balance. This reduces
the wear of drive and the acoustic operating noise.
Each rotor indicates what the maximum capacity is per hole. (It is allowed to operate e.g. a 12-place-
rotor with 2 or 4 loaded tubes only, but the loaded borings must be opposite of each other).

OPERATION
14 Z207MK_V1.21_eng © Hermle Labortechnik GmbH
Figure 14 wrong
Figure 15 right
2.1.3 Loading and Overloading of Rotors
All approved rotors are listed with their maximum speed and maximum filling weight, in
Table 2: "Permissible Net Weight", (see APPENDIX P. IV).
The maximum load permitted for a rotor is determined by the manufacturer, as well as the maximum
speed allowed for this rotor (see label on rotor), must not be exceeded. The liquid the rotors are
loaded with, should have a max. homogeneous density of 1.2 g/ml or less when the rotor is running
at maximum speed.
In order to spin liquids with a higher density, the speed has to be reduced, according to the following
formula:
Reduced speed nred =√1,2
ℎ𝑖𝑔ℎ𝑒𝑟 𝑑𝑒𝑛𝑠𝑖𝑡𝑦 x max. speed (nmax) of the rotor
Example:
nred = √ 1,2
1,7 x 4.000 = 3.360 rpm
In case of any questions, please contact the manufacturer!
2.1.4 Removing the Rotor
Completely, untighten the rotor fixing nut (2. screw over the stiff point) and lift the rotor vertically out of
the centrifuge, (see Figure 12 and Figure 13Fehler! Verweisquelle konnte nicht gefunden
werden.).

OPERATION
© Hermle Labortechnik GmbH Z207MK_V1.21_eng 15
2.2 Lid
2.2.1 Lid Release
After the run, properly close the lid of the centrifuge, appearing in the display, "rpm/rcf"(A-1) with the
word, "close" (M1). If the centrifuge lid is closed, the code number of the preset rotor is shown in the
display. Even if the rotor is not inserted. By pressing the key, "lid" (7), the lid of centrifuge can be
released. As soon as the electromagnetic lid is completely released, the word, "open" (M2) appears.
The lid of the centrifuge is now able to be opened.
For all number marked text, please refer to Figure 16 .
Figure 16
2.2.2 Lid Lock
The centrifuge lid must be pressed down, until the latch audibly locks. At the same time disappears
the word „open“ (M2). As a sign that the centrifuge is ready for starting, appearing in the display,
"rpm/rcf"(A-1), the word "close" (M1). Simultaneously, the word "rotor" (M3) appears, as well as the
code number of the rotor, which is pre-set, i. e. "nr 22x.xx“ (M4), along with all rotor specific data, for
example: max. speed, acceleration etc., are available.
For all number marked text, please refer to Figure 16.
ATTENTION: Don't grip your fingers between lid and device or locking mechanism,
when closing the lid!

OPERATION
16 Z207MK_V1.21_eng © Hermle Labortechnik GmbH
2.3 Pre-Selection
2.3.1 Pre-Selection of Speed / RCF-Value
Selecting the key, "rpm/rcf" (4), pre-selection is activated. By pressing the key once, the word "rpm"
(M5) flashes. By pressing the key again, the pre-selection of the centrifugal forces can be chosen.
The flashing word, "rcf" (M6), will appear. The desired values can be selected, with the control field
(1). In the display (A-1), the regulated value is shown permanently: before, during and after the run.
For all number marked text, please refer to Figure 17.
Figure 17
As long as the centrifuge lid is open, the speed is adjustable between 200 rpm and the maximum
revolution of the centrifuge.
If the centrifuge lid is closed, the speed can only be pre-selected up to the maximum permissible
revolution of the pre-set rotor. It is the same with the pre-selection of the RCF-Value. The setting
range is between 3 xg and the maximum permissible centrifugal force of the rotor.
See Table 4: "Max. Speed and RCF-Values for Permissible Rotor", (see APPENDIX P. V). All
important values are listed on this table.
ATTENTION:
Please check the maximum permissible revolutions of your test tubes! (Producer
Indication).
2.3.2 Pre-Selection of Running Time
The running time can be pre-selected in 3 different ranges: from 10 seconds up to 99 hours 59
minutes.
1. Range from: 10 seconds up to 59 minutes 50 seconds, in steps of 10 seconds
2. Range from: 1 hour up to 99 hours 59 minutes, in steps of 1 minutes
3. Range: Continuous Run "cont", can be interrupted by the key, "stop" (10).
-The running time can be pre-selected, with the lid opened or closed.
-To activate the setting of the running time, press the key "time" (6).
-In the display, "time" (A-3) flashes the indication: "m : s" or "h : m", depending on the previous
setting.
To set the desired value, use the control field (1). After exceeding 59 min 50 sec, the indication
changes automatically to, "h : m". After exceeding 99 hours 59 min, the word "cont" appears in the
display, "time" (A-3). The continuous run can only be interrupted by pressing the key, "stop" (10).
The time counts down, as soon as the set speed is reached.