Four E's Scientific OHS-20D Manuel utilisateur

Operating Instructions

操作说明书

OHS-20D / OHS-40D

Overstar20/ Overstar40

Overhead Stirrer

顶置搅拌器

Contents

Declaration of conformity

Safety instructions

Correct use

Unpacking

Operating instructions

Switch on and run

Faults

Error codes

Maintenance and cleaning

Technical data

Warranty

Declaration of conformity

We declare under our sole responsibility that this product is in

compliance with the regulations 2014/35/EU, 2006/42/EC and

2014/30/EU and conforms to the standards or normative documents:

EN 61010-1, EN 61010-1-2-051, EN 61326-1, EN 60529 and

EN ISO 12100.

Safety instructions

/// General information

• Read the operating instructions in full before starting up and follow the

safety instructions.

• Keep the operating instructions in a place where they can be accessed

by everyone.

• Ensure that only trained staff work with the appliance.

• Follow the safety instructions, guidelines, occupational health and

safety and and accident prevention regulations.

• Because the options for combining products, tools, stirring vessel,

experiment and medium are nearly endless, user safety cannot be

ensured simply with design requirements on the part of the product.

For example, glass device or other stirring vessels that are sensitive

to mechanical stress can be damaged or shattered by an imbalance,

increasing the speed too quickly or too little distance between the

stirring element and the stirring vessel. Users can suffer serious injury

from glass breakage or from the freely rotating stirring element. For

this reason, it may become necessary for users to take other

precautionary safety measures.

• Only process media that will not react dangerously to the extra energy

produced through processing. This also applies to any extra energy

produced in other ways, e.g. through light irradiation.

• Do not operate the instrument in explosive atmospheres, with

hazardous substances or under water.

• Process pathogenic materials only in closed vessels under a suitable

fume hood. Please contact us if you have any question.

If installation or positioning cannot ensure this access at all times,

an additional EMERGENCY STOP switch that can be easily

accessed must be in stalled in the work area.

/// Instrument design

• The instrument is not suitable for hand-held operation.

• The high torque requires particular care in the choice of stand, cross

sleeve and anti-rotation element for the agitating vessel.

• Set up the stand in a spacious area on an even, stable, clean, non-slip,

dry and fireproof surface.

• Ensure that the stirring element is securely clamped in the chuck.

• Use stirring shaft protective equipment.

• The agitated vessels used for stirring have to be secured. Consider on

a good stability of the entire structure.

/// Accessories

• Protect the instrument and accessories from bumping and impacting.

• Check the instrument and accessories before hand for damage each

time when you use them. Do not use damaged components.

• Safe operation is only guaranteed with the accessories provided by

Four E’s Scientific.

• Always switch the main switch in the OFF position or disconnect the

power before changing stirring element and fitting allowed accessories.

/// Instrument protection

• There may be electrostatic activity between the medium and the output

shaft which could cause a direct danger.

• After an interruption in the power supply or a mechanical interruption

during a stirring process, the unit does not restart automatically.

• It is important to note that the surfaces of the motor (cooling fins) and

certain parts of the bearing may get very hot during operation.

• Never cover the ventilation slots or cooling fins on the motor or on the

instrument.

• Avoid knocking and impacting on the lower end of the shaft and the

chuck gear teeth. Even minor, invisible damage can lead to imbalance

and uneven shaft action.

• Ensure that the stand does not start to move.

• Imbalance of the output shaft, the chuck and in particular the stirring

tools can lead to uncontrolled resonant vibrational behavior of the

instrument and the whole assembly. Glass apparatus and stirrer

containers can be damaged or shattered by this. It can cause injury to

the operator, also can damage the rotating stirring tool. In this case

exchange the stirring tool for one without imbalance or remedy the

cause of the imbalance. If there is still imbalance, return it to the dealer

or the manufacturer along with a description of the fault.

• If the instrument is operated too long in over load or if the ambient

temperature is too high, the instrument switches off permanently.

• The machine must only be opened by trained specialists, even during

repair. The instrument must be unplugged from the power supply before

opening. Live parts inside the instrument may still be live for some time

after unplugging from the power supply

/// Experiment procedure

• Please observe the permitted speed for the stirring element. Never

set higher speed.

• Make certain that the unit is set at the lowest speed before

commissioning; otherwise, the unit will begin running at the speed set

in last operation. Gradually increase the speed.

• Pay attention when setting the speed to any imbalance of the stirrer

tools and possible spraying of the medium to be stirred.

Never operate the instrument with the stirrer tools rotating freely.

Ensure that parts of the body, hair, jewelry or items of clothing

cannot be trapped by the rotating parts.

The operation of a free rotating shaft end is dangerous. Therefore,

for safety reason, only insert through the stirring tool over the

upper edge of housing at standstill.

Wear your personal protective equipment in accordance with the

hazard category of the medium to be processed, otherwise there

is a risk of:

- splashing of liquids

- projectile parts

- body parts, hair, clothing and jewelry getting caught.

Beware of the risk of:

- flammable materials

- glass breakage as a result of mechanical shaking power.

- agitating vessel breakage as a result of displacement of no-fixed vessel

Reduce the speed if:

- the medium splashes out of the vessel because the speed is too high

- the instrument is not running smoothly

- the instrument begins to move around because of dynamic forces

- an error occurs.

- agitating vessel relative displacement as a result of mechanical

resonance

Do not touch rotating parts during operation!

/// Power supply/OFF

• The instrument can only be disconnected from the mains supply by

pulling out the mains plug or the connector plug.

• The socket for the mains cord must be easily accessible.

• The voltage stated on the type plate must correspond to the mains

voltage.

Correct use

/// Application

• For mixing/stirring liquids with low to high viscosities by various stirring

tools. Intended use: Stand device (chuck points down)

/// Range of use

• Laboratories, pharmacies, universities, schools.(indoor use only)

• The safety of the user cannot be guaranteed:

- If the instrument is operated with accessories that are not supplied or

recommended by the manufacturer

- If the instrument is operated improperly or contrary to the manufacture’s

specifications

- if the instrument or the printed circuit board are modified by third parties.

- the voltage used is not correspond to the voltage stated on the type plate

Items

Overhead stirrer (including the extension arm)

Power cable

Propeller stirrer

Chuck protector

Operating instruction

Qty

Unpacking

/// Unpacking

• Please unpack the device carefully

• In the case of any damage a detailed report must be sent immediately

(post, rail or forwarder).

Note: Do not connect the power supply if the device is visibly damaged.

/// Delivery scope

① LED display

② Knob

③ DC Power port

④ Main switch

⑤ Chuck key (Type-B)

⑥ Chuck with key (Type-B)

⑦ Handle (left-right)

⑧ Stainless steel stand

⑨ Cross clamp

⑩ Baseplate

⑪ Nut

⑫ Chuck by hand (Type-A)

Operating Instructions

①

②

B-typeA-type

⑤⑥

③

④

⑩

⑪

⑧

⑦

⑨

⑫

/// Securing the universal plate stand

Firstly, manually screw the stainless steel stand (⑧) with the nut (⑪)

into the corresponding threaded hole on the baseplate (⑩). Then tighten

the nut (⑪) clockwise with your wrench. Finally, check whether the

stainless steel rod is firmly fixed on the baseplate.

/// Securing the overhead stirrer to the stand

First secure the cross clamp (⑨) to the stainless steel stand (⑧), and

the height of the cross clamp can be adjusted according to different

vessel volume, then tighten the handle (left) (⑦). Then secure the

extension arm to the other slot of cross clamp (⑨) , and tighten the

handle(right) (⑦) above the cross clamp (⑨).

Before use, please check whether the stirrer is firmly fixed. The position

of the stirrer can be adjusted only when the instrument is switched off

and the stirrer stops working.

/// Securing the stirring shaft

Type-A Chuck: Turn clockwise to loosen the chuck, insert the stirring

shaft into the mounting hole of the chuck (⑫), and turn

anticlockwise to tighten the chuck (⑫). The stirring

shaft can only be changed when stop working and the

power supply is disconnected.

Type-B chuck: Turn counterclockwise the chuck key (⑤) to loosen the

chuck. Then insert the stirring shaft into the mounting

hole of chuck (⑥) and turn clockwise the chuck key

(⑤) to tighten chuck. The stirring shaft can only be

changed when stop working and the power supply is

disconnected.

Switch on and run

• The voltage required by the device must correspond to the mains voltage.

Note: If above condition is met, the device is ready for operation when

the main plug is plugged in.

If above condition is not met, safe operation is not guaranteed and

the device could probably be damaged.

• After switch on the main switch (④), all the LED display is light and it

will display the last setting speed on the screen after a few seconds.

Ensure the speed set is suitable for the test medium selected.

Error code

Er1

Er2

Er3

Cause

Motor blockage

Motor overspeed

Motor overload

Solutions

Switch off the

device,

and restart again

Error Description

Motor stops running

and

the buzzer alarms

• If not sure whether the speed is proper or not , set the speed

adjustment knob (②) to the lowest speed (left hand position). Press

the knob (②) to start or stop the stirring.

Faults

• The device can’t work when switch on.

- Check if the power cord is connected correctly.

- Check if the DC power port is disconnected or loose.

Error codes

Maintenance and cleaning

The device is maintenance-free. It is only subject to the natural wear and

tear of components and their statistical failure rate.

Maintenance

Please send the device for repair only after it has been cleaned and is

free from any materials which may constitute a health hazard. If you

require service, return the instrument in its original packaging.If the

original packaging is not sufficient. Please also use suitable transport

packaging.

Cleaning

- Disconnect the main plug when cleaning!

- Wear protective gloves during cleaning the instruments.

- Electrical instruments may not be placed in the cleansing agent for the

purpose of cleaning.

- Do not allow moisture to get into the instrument when cleaning.

- Use only cleaning agents which have been approved by us to clean

our instruments.

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