Gerber Instruments Micro 3 User manual

Centrifuge Micro III
OPERATING INSTRUCTIONS

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 1 Version 1.2 (03/2021)
Table of contents:
1. Introduction 3
1.1 Use 3
1.2 Description 3
1.3 Ambient conditions 3
2. Safety instructions 3
2.1 Symbols of the operating instructions 3
2.2 General safety 4
2.3 Informal safety instructions 4
2.4 Safety instructions for centrifugation 5
2.5 Safety instructions for cover lock 5
2.6 Safety instructions for unbalance switch-off 5
3. Description of centrifuge Micro III 6
4. Unpacking/Device control 7
4.1 Unpacking 7
4.2 Device control 7
4.3 Control accessories 7
4.4 Avoiding damages on the device 7
5. Description of operating unit 8
5.1 Segment display 8
5.2 LED-displays 8
5.3 Button functions 9
6. Commissioning 10
6.1 Initial start 10
6.2 Setting the preheating function 10
6.3 Setting time and temperature 11
7. Daily work 11
8. Cleaning and maintenance 12
8.1 General notes for cleaning and maintenance 12
8.2 Notes for cleaning with glass breakage 12
9. Checking the unbalance switch-off 12
10. Disturbances 13
10.1 Error table 13
10.2 Emergency release of the lid on power interruption 13

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 2 Version 1.2 (03/2021)
11. Packaging 14
12. Disposal 14
13. Technical service 14
14. Warranty 15
15. Order numbers centrifuge Micro III 16
16. Order numbers accessories Micro III 16
17. Technical data Micro III 17

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 3 Version 1.2 (03/2021)
Warning symbol: Attention, possible dangerous situation
Warning symbol: Dangerous electrical voltage
1. Introduction
1.1 Use
The small centrifuge Micro III is used for the determination of fat in milk and dairy products
according to Gerber or Babcock.
1.2 Description
The centrifuge Micro III has high safety standards and reliability and following
product features:
Strong sheet steel housing with an acid-resistant paint work
Cover lock to prevent opening of the centrifuge during operation
Motor with elastic bearing for a smooth run
NEW: Increased precision thanks to the controlled speed
NEW: Preheating option
NEW: Unbalance switch-off in case of uneven filling or sudden glass breakage
1.3 Ambient conditions
Permissible ambient temperature +10 °C to +40 °C
Max. humidity 80 %
Lowest storage and transport temperature -20 °C
2. Safety instructions
2.1 Symbols of the operating instructions



Operating Instructions Centrifuge Micro III
Gerber Instruments AG 4 Version 1.2 (03/2021)
2.2 General safety
Before connecting the device to a fused and properly earthed AC outlet it is
necessary to compare the indications on the type plate of the centrifuge or by means
of the technical data (item 17) with your mains connection.
The proper function and operational safety of the device can only be ensured by
complying with among the mentioned ambient conditions (item 1.3).
If the device is transported from a cold to a warm environment some malfunction may
occur due to the formation of condensation. In this case, it is necessary to wait untill
the temperature of the device adapts to the room temperature before recommissioning
the device.
The centrifuge should only be operated by authorized persons.
Anyone who is under the influence of health disturbances, medications, drugs,
alcohol or over fatigue must not operate the device. Users must be familiar with the
contents of the operating instructions.
Do not use the device with a damaged cable or plug.
The use of accessories which are not original spare parts from Gerber Instruments
results in loss of warranty.
Switch off / disconnect the device from the mains, if it is not being used, if parts are
replaced and if the device is being cleaned.
If you no longer can work properly with the device, then it needs to be
decommissioned and secured against recommissioning by labelling it.
Contact the technical service of Gerber Instruments AG (item 11).
2.3 Informal safety instructions
Read the operating instructions carefully before installation. The non-observance of
these instructions may result in malfunctions or damages to the centrifuge or persons.
A claim under guarantee cannot be granted.
The operating instructions are a part of the device. Keep these during the life of the
centrifuge.
Pass the instructions on to any subsequent owner or user of the centrifuge.
The operating personnel must have read and understand the operating instructions.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 5 Version 1.2 (03/2021)
2.4 Safety instructions for centrifugation
Please check that the centrifuge is set up properly (see 4.1)
Please check before commissioning the centrifuge, rotor and accessories for visible
damage (see 4.2)
The rotor must be loaded symmetrically at equal weights (see 6.1 and 7.).
Avoid corrosion on centrifuge and accessories by careful maintenance (see 8).
Open the centrifuge when it is not in use so that moisture can evaporate.
The centrifuge can be stopped at any time. Press the START/STOP button.
2.5 Safety instructions for cover lock
The centrifuge may only be operated with the cover closed. A cover lock blocks the
cover closure during the run and allows you to open only at standstill.
In case of cut-off of electricity the lid may be opened manually (see 10.2).
2.6 Safety instructions for unbalance switch-off
The centrifuge stops automatically in case of strong vibrations. The switch-off
sensitivity is set at the factory.
If an unbalance switch-off took place, the centrifuge is stopped immediately and a
message appears on the display.
Open the cover and remove the causes of the unbalance.
Close the cover and press START/STOP again.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 6 Version 1.2 (03/2021)
3. Description of centrifuge Micro III
Cover
Housing
Main switch and mains plug connection
Rotor with inserts
Operating unit
1
2
3
4
5
1
2
5
4
3

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 7 Version 1.2 (03/2021)
4. Unpacking/Device control
4.1 Unpacking
Make sure that the packaging has not been damaged.
Take the device and the inserts out of the packaging box.
Remove the remaining packaging material.
Remove the foam material in the centrifuge, see 6.1.
Place the device on a flat and dry substructure.
4.2 Device control
Control the centrifuge according to the following criteria:
Transportation damages
Other irregularities
If one of these criteria applies, immediately inform the forwarding agent or the supplier.
4.3 Control accessories
Check with the delivery note and your order if the scope of delivery is complete:
Type of centrifuge
Sleeves
Specific country cable
Fork key
Wire for emergency unlocking
Operating instructions
4.4 Avoiding damages on the device
Do not drop or disassemble the device.
The centrifuge must always be placed on a firm and dry substructure.
During transport from cold to warmer places, condensation water will collect inside the
centrifuge. It is important to allow sufficient time for drying before the centrifuge can be
used again.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 8 Version 1.2 (03/2021)
5. Description of operating unit
The control unit consists two segment displays, 5 LED’s and 4 buttons.
5.1 Segment display
Time display
It is a 4-digit display showing the set time in the standby mode and the elapsed
time in the operating mode (centrifugation).
Factory setting: 5 minutes
Temperature display
It is a 2-digit display showing the set temperature in the standby mode and the
actual temperature in the operating mode (centrifugation).
Factory setting: 55 °C, as the reaction milk + sulphuric acid also generates heat.
5.2 LED displays
LED Brake
This LED is simple and lights up red shortly before the end of the braking process.
LED Time
This LED is dual. In standby mode it lights up red. In the operating mode
(centrifugation) it lights up green and starts flashing.
LED Rotor
This LED is dual. In standby mode it lights up red. In the operating mode
(centrifugation) it lights up green.
LED Heating
This LED is single and flashes red in operating mode (centrifugation).
LED Alarm
This LED is single and flashes red when a failure occurs.
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8
9
10
11
1
2
3
4
5
6
7
4
5
6
7

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 9 Version 1.2 (03/2021)
5.3 Button functions
Button SET
Setting temperature and time (Setup mode)
Button
Increase of temperature and time
Button
Reduction of temperature and time
Button START/STOP
Start the centrifuge, stops the centrifuge before the set time has elapsed.
Pre-heating function
8
9
10
11

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 10 Version 1.2 (03/2021)
6. Commissioning
6.1 Initial start
Put the centrifuge on a solid surface. The surface must be vibration-free and be sure
that there’s a space of 30 cm at the rear of the housing.
Connect the centrifuge with the mains. Check whether the mains voltage and
frequency in your country correspond to the technical specifications of the device.
When you switch on the device, it automatically detects whether the device is
connected to the 230 V AC power supply or the 115 V AC power supply.
Turn on the green main switch on the right side.
A short click sounds (the lid is unlocked).
The LED Time and Rotor light up red.
The segment displays show the factory set time (5 min) and temperature (55 °C).
Open the cover. The time segment display shows LId/OPEn.
Remove the foam from the rotor
Now insert the sleeves. Generally all the places of the rotor should be filled with
sleeves.
6.2 Setting the preheating function
Close the lid.
Press the Button START/STOP for 5 seconds.
The segment displays show Pr.HE and the current temperature.
The centrifuge starts preheating at reduced speed (approx. 400 rpm) to the factory set
temperature (55°C).
To exit, press the START/STOP button.
If preheating is required, the function must always be reactivated after termination.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 11 Version 1.2 (03/2021)
6.3 Setting time and temperature
By pressing the SET button, the centrifuge switches to setup mode. The time display
will start flashing and you can set the desired time with the arrow keys (1-99 minutes).
Press the SET button again to confirm.
Now the temperature display flashes and the desired temperature can be set with the
arrow keys (0-65 °C).
Press the SET button again to confirm.
The centrifuge is now in standby mode again.
It is not possible to change the two parameters in operating mode (centrifugation).
7. Daily work
Put your prepared and sealed butyrometers into the sleeves.
To avoid unbalance, the opposite places in the rotor must always be filled.
The butyrometers must be nearly identical in terms of weight.
Close the cover.
Set the desired temperature and duration.
Press the button Start/Stop, the safety interlock is activated.
The LED Rotor lights up green, the LED Heating lights up red. The current
temperature is displayed, the rotor accelerates.
Once the rotor has reached the speed, the LED Time flashes green and a short beep
sounds.
The time display starts and counts down.
The rotor continues to rotate until the set time has elapsed or the Stop button has
been pressed.
After the set time has elapsed, a short signal tone sounds and the centrifuge brakes.
The standstill of the rotor is indicated by a 3 fold tone, in the time segment display
END appears.
The centrifuge unlocks with a short "click".
The LED Time and Rotor light up red.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 12 Version 1.2 (03/2021)
8. Cleaning and maintenance
8.1 General notes for cleaning and maintenance
Switch off the device by pressing the main switch and disconnect it from the
power supply.
If necessary, clean the surface and the inside of the centrifuge with a damp, lint-free
cloth.
Open the centrifuge when not in use so that any moisture can escape.
Protect the centrifuge and rotor from intense UV radiation.
8.2 Notes for cleaning with glass breakage
If glass breakage occurs during centrifugation, press the START/STOP button.
Open the cover.
Switch off the device at the main switch and disconnect it from the power
supply.
Let the centrifuge cool down.
Remove the 4 cross-head screws from the intermediate plate and remove the
intermediate plate.
Carefully remove the butyrometers and sleeves.
Remove the rotor with the supplied fork key.
In case of glass breakage, remove all splinters immediately and completely.
If sulphuric acid has leaked out, clean the interior of the centrifuge and the
sleeves immediately in accordance with the guidelines for handling acids.
9. Checking the unbalance switch-off
The function of the unbalance switch-off should be checked at regular intervals. This work
may only be carried out by authorized personal. The centrifuge must be supervised during
this check.
Check that all sleeves are clean and free of foreign objects.
Place a 10 g weight in one of the centrifuge sleeve.
Close the cover and press the START/STOP button.
The rotor accelerates and after a few seconds the centrifuge has to switch off. The
error message Ibal inbalanced appears on the display and a beep sounds. Pressing
the START/STOP button or opening the lid will silence the beep.
If the centrifuge does not switch off, press the START/STOP button immediately. In
this case, the centrifuge may no longer be used. If you are unable to determine and
remedy the causes of the shutdown yourself, contact Gerber Instruments AG
Technical Service (see point 13).
If the centrifuge with this weight switches off, remove the weight out of the sleeve.
The centrifuge is still ready for operation.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 13 Version 1.2 (03/2021)
10. Disturbances
10.1 Error table
Disturbance/
Error indication Possible causes Measures
The lamp on the main switch
no longer lights up. Main fuse defect Lamp from the main switch
defect
Replace the main fuse (at the
back of the main socket).
Replace lamp from the main
switch.
No indication on the display
despite voltage present. Electronic defect Contact the service of Gerber Instruments AG.
Cover can no longer be
opened. Power interruption See 2.5 Safety instructions for cover locking.
Centrifuge starts, but stops
immediately again. Electronic defect Contact the service of Gerber Instruments AG.
Ibal Unbalance in the centrifuge Press the stop button, open
the cover and remove the
causes of the unbalance.
Acoustic alarm sounds and
other failure indications. Make a note of the error message, make a note of the
S/N. Contact the service of
Gerber Instruments AG.
10.2 Emergency release of the lid on power interruption
Disconnect the centrifuge from the mains (main switch out, mains cable from mains
socket).
Insert the supplied wire into the small hole and move it to the left. As soon as
resistance is felt, the lid can be opened.
Engage the lid upwards, connect the centrifuge to the power supply and turn on the
main switch.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 14 Version 1.2 (03/2021)
11. Packaging
The device will be delivered in a special packaging. Please keep the original packaging for
any return shipping.
12. Disposal
At the end of its life time, the instrument must be disposed or collected in the appropriate
ways, according to the regulations in force in the country of use.
For further information please contact our sales office:
Email: [e-mail]
Phone: [phone]
Fax: [phone]
13. Technical service
Address:
Gerber Instruments AG
Im Langhag 12
CH-8307 Effretikon
Phone: [phone]
Fax: [phone]
Email: [email protected]

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 15 Version 1.2 (03/2021)
14. Warranty
We refer to our terms and conditions.
Gerber Instruments AG guarantees that this product is free from defects regarding
material and functionality during the term of 2 years. Precondition for this is the use as
intended and the observance of the instructions included in these operating instructions. If
nonetheless a defect occurs during this term Gerber Instruments AG will arrange the
replacement free of charge. The device has to be returned during the period of guarantee.
The product needs to be returned by the customer to the company Gerber Instruments AG
carriage forward.
Guarantees do neither effect a prolongation of the period of guarantee nor a claim on a new
guarantee.
Any repairs due to usual wear will not be performed free of charge. The customer pays the
freight cost for replacement parts.
Gerber Instruments AG is not liable for any damages:
which are caused by lack of maintenance (corrosion)
which are caused by unauthorized repair or reconstruction works
which are caused by wrong operation or wrong use
which are caused by using under incorrect environment conditions
which result from the use of non-original Gerber spare parts

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 16 Version 1.2 (03/2021)
15. Order numbers centrifuges Micro III
Order No.
Description
03.2255 Centrifuge Micro III with Gerber-Rotor and 8 Butyrometer
sleeves, 115/230 VAC, 50/60 Hz
03.2265 Centrifuge Micro III with Gerber-Rotor and 12 Butyrometer
sleeves, 115/230 VAC, 50/60 Hz
03.2275 Centrifuge Micro III with Universal-Rotor and 8 Babcock
sleeves, 115/230 VAC, 50/60 Hz
16. Order numbers accessories Micro III
Order
No.
Description
03.17000 Operating and control unit
03.17001 Frequency converters
03.17002 Unbalance sensor
03.17003 Heating
03.17004 Main switch
03.17005 Temperature sensor
03.17006 Motor
03.17007 Relay for heating
03.17008 Power supply
03.17009 Cover locking
03.17010 Sensor cover locking
03.16216 Gerber-rotor for 8 samples
03.16217 Gerber-rotor for 12 samples
03.16219 Wire for emergency unlocking
03.16269-8 Butyrometer sleeves qty.=8 pieces
03.16269-12 Butyrometer sleeves qty.=12 pieces
03.41001 Universal-rotor for Babcock
03.17278 Babcock sleeves qty=1 piece.

Operating Instructions Centrifuge Micro III
Gerber Instruments AG 17 Version 1.2 (03/2021)
17. Technical data Micro III
Control Microprocessor control
Timer 1 - 99 minutes
Power 115 or 230 VAC
Frequency 60 or 50 Hz
Power heating 900 W
Speed 1280 rpm ± 50 rpm fixed program
Centrifugal power 350 x g permanent adjusted
Temperature Thermostatically controlled 5 °C above ambient to 65 °C,
factory set at 55 °C
Dimensions (WxDxH) 430x530 x 288 mm
Weight netto 23.5 kg without sleeves
Weight total up to 28.5 kg incl. accessories and packaging
Warranty 2 years
Test certificate CE