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Safety requirements for electrical equipment for measurement, control and for laboratory use
IEC/EN 61010-1
Electrical equipment for laboratory use
UL 61010-1
General requirement - Canadian electrical code
CAN/CSA-C22.2 No.61010-1
by VELP Scientifica
Instruction Manual
CG-2024-10
Overhead Stirrer
General Information
This unit must be used for laboratory applications only.
The manufacturer declines all responsibility for any use of the unit that does not comply with these instructions.
This unit has been designed and manufactured in compliance with the following standards:
Before using the unit, please read the following instruction manual carefully.
Do not dispose of this equipment as urban waste, in accordance with EEC directive 2002/96/CE.
VELP reserves the right to modify the characteristics of its products with the aim to constantly improving their quality.
Safety Regulations
The values indicated on the rating plate of the instrument must correspond to those of the power supply.
Position the instrument on a flat surface, with a distance from the wall of 30 cm (at least).
Fasten the unit to the support rod using the double clamp. Secure the receptacle using the ribbon clamp.
Safe working conditions are ensured only when the accessories described in the dedicated chapter are used.
The working speed set on the instrument must be such as to avoid wobbling and/or splashes.
Do not use the instrument in explosive environment or with dangerous substances.
The unit must not be immerged in water.
It is dangerous to run the unit with the stirring blade turning in free air.
Always place the stirring shaft in the receptacle before turning the unit on.
Do not run the unit with the stirring shaft protruding through the top membrane.
This membrane should be fully closed when the unit is in use.
Contents
1. INTRODUCTION .............................................................................................................................................................. 2
2. ASSEMBLY AND INSTALLATION ................................................................................................................................... 2
2.1 ELECTRICAL CONNECTION ............................................................................................................................................. 2
2.2 START-UP .................................................................................................................................................................... 2
2.3 INFORMATION ABOUT CONSTRUCTION MATERIALS........................................................................................................... 2
3. OPERATING CONTROLS ............................................................................................................................................... 2
3.1 TORQUE INDICATOR ...................................................................................................................................................... 2
3.2 OVERLOAD PROTECTION ............................................................................................................................................... 2
4. MAINTENANCE ............................................................................................................................................................... 3
4.1 CLEANING .................................................................................................................................................................... 3
5. TECHNICAL DATA .......................................................................................................................................................... 3
6. WIRING DIAGRAM .......................................................................................................................................................... 3
7. ACCESSORIES ............................................................................................................................................................... 4
8. WARRANTY ..................................................................................................................................................................... 4
9. DECLARATION OF CONFORMITY ....................................................................................................................... 4
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1- Chuck
2- ON/OFF switch
3- Display
4- Control knob
1. Introduction
Overhead stirrers are generally used for laboratory applications where the solubilization, mixing, suspension, emulsioning
and homogenization of samples is required. CG-2024-10 overhead stirrers with electronic speed control and advanced
safety features are able to satisfy the most diverse needs of the laboratory in terms of both viscosity and volume.
The chuck is keyless and ensures a secure and easy-to-fit mount for stirring shafts of up to 10mm in diameter. The stirring
speed is controlled by a microprocessor and is constantly and automatically re-aligned to the set value even when there are
variations in the viscosity of the liquid. Fluctuations in the voltage within the accepted range do not alter the quality of stirring
speed alignment. The stirring time is controlled electronically, values of up to 999 minutes and 59 seconds can be set and
the time remaining displayed on the LCD. The relative torque value can also be displayed.
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2. Assembly and installation
Check the integrity of the unit after unpacking. The box includes:
Overhead stirrer
Instruction manual
Allen key
Allen head screw
Shaft
Power suppy cable
2.1 Electrical connection
After unpacking the instrument, place the unit on the laboratory bench. Before connecting the instrument to the power
supply, make sure that the values on the rating plate correspond to those of the power supply.
Ensure that the socket and the relative cut-off device conform to current safety norms and are easy to reach.
2.2 Start-up
Assemble the shaft using the Allen head screw. Fasten the instrument securely to the support rod with the double clamp.
Secure the receptacle using the ribbon clamp to avoid damage.
2.3 Information about construction materials
Housing Die casting Polymer Structure Aluminum Control panel PET
3. Operating controls
Turn the unit on using the mains switch. After a few seconds the instrument model and the software version will appear on
the display. When the instrument is in use the graphic display shows the real chuck speed (rpm) and the set speed (rpm
set). Speed and time functions are controlled by an encoder. Turn the control knob to select stirring speeds of from 50 to
2000 rpm. Press the control knob to activate the timer and turn the knob to select the stirring time. Stirring times of up to
999’:59” can be selected. Press the control knob to start count-down. At the end of the set time stirring stops and “END” will
appear on the display.
NOTE: The speed setting is saved when the instrument is turned off or if there is a power failure. When the instrument is
turned on again, the value flashes for approximately 8 seconds before stirring starts. During this time the speed setting can
be changed using the control knob.
3.1 Torque indicator
Keep the control knob pressed for approx. 3 seconds to display the torque trend value, i.e. the value in Ncm of the effective
torque on the stirring shaft .
To reset the torque value and measure the relative torque, keep the control knob pressed for approx. 3 seconds.
NOTE: The torque value indicated is not an absolute value. The reading indicates the variation in the torque value
compared to a set value defined by the operator. The most precise torque trend values are obtained once the instrument
has reached the optimum working temperature -Optimum time 10-15 minutes.
3.2 Overload protection
The current and voltage are electronically limited in order to safeguard the motor and the electronic parts against electric
surges. In the event of abnormal conditions arising the following error messages appear on the display and the unit shuts
down automatically.
Over Load Current surges
The stirrer can compensate for eventual current surges for a limited period of time in which case the following symbol
appears in the top rh corner of the display . If the situation persists, the speed of the motor is gradually reduced.
When a speed of 0 is reached “OVERLOAD” appears on the display and the unit shuts down.
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Admitted power supply
From 80 to 260Volt 50/60Hz
Max. input / output power
130W / 120 W
Dimensions (WxHxD)
80x230x196 mm (3.1x9.0x7.7 in)
Weight
3 Kg (6,6 lbs)
Speed range at nominal load
50 – 2000rpm
Speed indicator / resolution / accuracy
LCD / 1rpm / ±2 rpm
Max torque stirrer shaft / accuracy
80Ncm / ±5 Ncm
Timer with automatic cut-off
From 000’:00” to 999’:59”
Max stirring quantity H2O
40 litres
Clamping chuck clamping range
From 1 to 10mm
Overload and overtemperature protection
Automatic cut-off
Enviromental / Storage ambient temperature
5 - 40°C (41 - 104°F) / -10… + 60°C (14 - 140°F)
Max humidity
80%
Electr. safety level CEI-EN60529
IP40
Pollution degree / installation cat. CEI-EN61010-1
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Max altitude installation
4000m (13123ft) asl
1. Fuse 5x20mm, 2x3A
2. Electric motor
3. Electronic board
4. Encoder
5. ON-OFF switch
6. Network filter
Over Curr Rpm error
This error message is displayed if the chuck is accidentally blocked or if the number of revs exceeds the permitted value.
Over Temp Temperature error
This error message may appear if the unit is used for heavy-duty work for prolonged periods of time and at an ambient
temperature that exceeds the max. permitted temperature. Before resetting the instrument allow it to cool down.
Over Volt Voltage surge
The software limits the power supply of the motor to the nominal value of the motor itself (60V). A high speed setting or a
heavy load on the chuck may prompt a higher voltage. In this case the voltage is limited to the nominal value of the motor
(60V) and the number of revs is reduced accordingly. In these conditions the following symbol appears in the top rh corner
of the display . If for any reason the power supply of the motor exceeds the maximum threshold value of 70V,
“OVERLOAD” will appear on the display and the unit will shut down.
NOTE: To reset the unit remove the load from the chuck and turn the unit off and on again using the mains switch.
4. Maintenance
No routine or extraordinary maintenance is necessary apart from periodically cleaning the unit as described in this manual.
In compliance with the product guarantee law, repairs to our units must be carried out in our factory, unless previously
agreed otherwise with local distributors.
4.1 Cleaning
Disconnect the unit from the power supply and use a cloth dampened with a mild, non-flammable detergent.
5. Technical data
6. Wiring diagram
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7. Accessories
Please contact Chemglass Life Sciences for more details about accessories.
www.cglifesciences.com 1-800-843-1794
8. Warranty
The unit is guaranteed against production defects for 25 months from our invoice date.
In accordance with this guarantee Chemglass Life Sciences undertakes to repair any units resulting as faulty due to the
quality of the materials used or poor workmanship.
Units rendered faulty due to inexpert handling/use or carelessness will not be replaced or repaired under warranty.
Exclusions:
The guarantee will be considered null and void for faults resulting from:
- inexperience and carelessness of the operator
- repairs, maintenance or replacement of parts carried out by personnel or Companies not authorized by the manufacturer
- use of the instrument that does not comply to the instructions/recommendations given in the present operating manual
- use of non-original spare parts.
9. Declaration of conformity
We, the manufacturer VELP Scientifica, under our responsibility declare that the product is manufactured in conformity with
the following standards:
EN 61010-1 (2001)
EN 61326-1 (2006)
2011/65/EU (RoHS)
2002/96/CE (RAEE)
and satisfies the essential requirements of the following directives:
- Machinery directive 2006/42/EC
- Low voltage directive 2006/95/EC
- Electromagnetic compatibility directive 2004/108/EC
- plus modifications
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