GB 4793.7-2008Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 7: Particular requirements for laboratory centrifuges (English PDF)

1.1 Scope

instead.

This section GB 4793 applies to electric laboratory centrifuge.

NOTE. If the whole or part of the device both are within the scope of this section, and belongs to one or more other partial range GB 4793, then it needs to meet

Requirements of other relevant standards in GB 4793.

1.1.2 within the scope of this section does not include

increase.

Add the following entry.

aa) IEC 60034 (rotary electric machine);

1.2 Purpose

Aspects of the contents within the scope of this 1.2.1

increase.

Add the following entry.

aa) in contact with the moving parts (see 7.2);

bb) mobile laboratory centrifuge at breakage (see 7.3.101);

cc) after breakage of rotor energetic chemical reaction [see 7.6.101.21)];

dd) ring failure (see 13.101).

1.2.2 aspects of the content within the scope of this section does not include

increase.

Add the following entry.

aa) separation of flammable or explosive material should be subject to additional precaution (see 5.4.101);

bb) a chemical reaction and separation can occur when the resulting large amount of gas hazardous materials subject to additional precautions initiator (see

5.4.101).

1.4 Environmental conditions

1.4.1 normal environmental conditions

modify.

The c) the content modification as follows.

c) at a temperature of 2 °C ~ 40 °C;

1.4.2 Extended environmental conditions

modify.

The c) the content modification as follows.

c) ambient temperature is below or higher than 2 °C 40 °C;

3.2 Parts and Accessories

increase.

Add the following eight new definition.

3.2.101

Enclosed space in the laboratory centrifuge rotating components rotate therein.

3.2.102

The basic components of a laboratory centrifuge, which carries the raw material by centrifugal force and is rotated under control of the drive system.

3.2.103

Assembled rotor assembly for supporting one or more tubes.

3.2.104

Completely encloses the rotating assembly cover, and the cover comprises fastening means.

3.2.105

Inlet centrifugal chamber lid.

3.2.106

Turned specified by the manufacturer with a head attachment.

GB 4793.7-2008/IEC 61010-2-020.2006

NOTE. In the above, the accessory comprising a rotor carrying a sample of the centrifuge rotor for use with all, or parts used in the centrifuge rotor, comprising

Adapter, tubes and bottles.

3.2.107

Centrifuge to provide a torque or rotational component to provide rotational support of all components.

3.2.108

A device or mechanisms, or may be attached between the basket with the closure head means designed to prevent leakage of material, e.g. centrifuged

Process of microbiological material.

3.5 Safety Terms

increase.

Add the following two new definitions.

3.5.101

Laboratory centrifuges to ensure safety around the space required.

3.5.102

A worst artificial selection of representative test conditions for evaluating a centrifuge - rotor combinations inherent mechanical safety (see

7.6 and Appendix BB).

4.3.1 Environmental conditions

increase.

Add the following new Note.

Note. because of condensation (see 11.101), so it should take into account the predetermined maximum humidity in 1.4.1d) and 1.4.2d) after cooling operation of the centrifuge.

5.1.2 logo

modify.

The b) the content modification as follows.

b) serial number or other methods to identify the production lot of equipment.

increase.

Add a new article.

5.1.101 turned around and accessories

All replacement by an operator and the rotating head assembly, comprising a rotor attachment shall identify the manufacturer or supplier name or registrar

Landmarks and identifiers.

If a component is too small or unsuitable for labeling, the required information shall be marked on the original packaging, at the same time stated in the document.

Note 1.A container or package may be within the outer packaging.

Note 2.Each head shall identify the serial number, or other methods, in order to uniquely identify the product lot number.

Note 3.The manufacturer shall specify the individual parts, such as a basket, for balancing or other reasons, should only be fitted or turned in a particular rotor in a particular position. should

Denote the corresponding numbers or letters to identify each gondola and rotor position.

Note 4.rotor accessory sets designed to be used, such as the weight, should have an identifying mark belong.

GB 4793.7-2008/IEC 61010-2-020.2006

By visual inspection to verify eligibility.

5.4.2 Equipment ratings

increase.

Add the following entry.

aa) Laboratory centrifuges dedicated all turned around, turned around and accessories and their nominal rotational frequency of inventory;

bb) any restrictions prohibiting manufacturer warning separated particular material;

cc) and rotating assembly loading instructions load shedding instructions (if applicable) and the volume density limit.

5.4.3 Equipment Installation

increase.

In a) later, add the following five sub-items.

1) safety space required for the intended use of the floor area or table (see 7.3.101);

Note. 7.3.101 specifies the maximum distance allowed in a laboratory centrifuge breakage event moved to 300mm, so the manufacturer's instructions shall require the use of

Those around the centrifuge marked out of this range, or be made the following requirements in laboratory management program, when a laboratory centrifuge work within this range

It was not, or any dangerous substances.

2) The total weight of the centrifuge;

3) Description of site preparation;

4) centrifuge leveling method;

5) fixedly mounting surface;

5.4.4 operating equipment

increase.

Add the following entry.

aa) to mount and balance.

bb) turned around and exchange programs.

cc) a predetermined stage in the separation process, the operator has the specific requirements in the field.

dd) personnel necessary safety measures, for example, instructions comprising.

--- not leaning on laboratory centrifuge;

--- stay in the safe space of time must not exceed the time necessary for operational reasons;

--- a safe space not place any potentially hazardous materials;

--- open the lid during the process of safe methods of operation (see 7.2.102.2).

ee) Instructions and other biological protection ring housing parts, comprising a suitable sealing techniques. Specification should the operator

Clear, seals and related parts constitute only part of the biological protective shell system (see domestic and foreign biological protection guide

It), when the processing which harmful microorganisms can not rely only way as to protect workers and the environment.

5.4.5 maintenance equipment

increase.

Note the original paragraph 1 as note 1, add a new paragraph 2 and Note 2 below.

If applicable, instructions for use should be noted.

aa) test apparatus and method for fixedly mounting surface of the mounting surface condition itself;

bb) safety measures during the cleaning operator;

cc) test of the protective cover;

dd) rotating inspection and safety assembly;

ee) Check the continuity of the connection protected;

ff) the frequency of inspection and other biological protection ring housing parts and replacement methods.

Note 2.The instructions should be clear that the operator, in accordance with the instructions for regular maintenance seals and other components for biological protective shell to ensure its long-term security

Use is very important.

GB 4793.7-2008/IEC 61010-2-020.2006

increase.

Add the following three new pieces.

5.4.101 dangerous substances

When a laboratory centrifuge toxic material, or comprises a radioactive contamination of harmful microorganisms, use instructions should be clear Prevention

Measures.

Note 1.This information is related to the safe operation and maintenance personnel of the.

In the specification should be prohibited using the following materials in a laboratory centrifuge.

a) flammable or explosive material;

b) generating a large number of materials lead to dangerous gases chemically react.

NOTE 2.When the processing of the above materials, may be designed as a laboratory centrifuge for special security, but these do not belong to the scope of this centrifuge.

By visual inspection to verify eligibility.

5.4.102 cleaning and disinfection

Documentation shall include.

a) If spills or hazardous substance into the device, the user has the responsibility to declare appropriate disinfection;

b) recommended by the manufacturer regarding cleaning and disinfection of where and generic name recommended disinfection and cleaning material;

c) the following statement.

"Before the manufacturer does not recommend cleaning and disinfection methods, users should check with the manufacturer to ensure that the method does not damage the set

Prepared. "

By visual inspection to verify eligibility.

5.4.103 chemical effects and environmental effects

To ensure the safety of the continued use of laboratory centrifuges, documents should be pointed out that the factors which may cause damage, such as.

a) chemical effect;

b) environmental impact, including natural ultraviolet radiation that may be encountered;

c) corrosion and wear protective cover parts or other security components of structural materials.

Note. it can be evaluated based on existing data, such as data provided by the material suppliers. Manufacturers can arrange for additional tests related to the use of laboratory centrifuges.

By examining the documents and related data to verify eligibility.

7.1 Overview

increase.

The original first paragraph of Note as Note 1, add a new Note 2.

Note 2.The results in breakage of the protective cover is damaged components should be considered as a single fault condition, such as a lid locking mechanism.

7.2 Moving parts

increase.

Add the following four new pieces.

7.2.101 cover

7.2.101.1 Requirements

Cover should be kept locked rotor drive means is energized, so far (see Appendix assembly until the rotational peripheral speed of not more than 2m/s when

BB).

GB 4793.7-2008/IEC 61010-2-020.2006

When the power fails, the cover shall not release the locking mechanism, use tools to loosen it.

The cover should withstand a sufficient locking force 7.6.102 the required tests, and can accommodate debris damage resulting [7.6 as a),

Provisions].

To assess which aspects of the following conditions apply to the centrifuge - rotor combinations related information to be recorded, the manufacturer or the detection means

The conduct of the trial.

a) For the mechanical misuse;

b) a locking failure;

c) displacement;

d) etching;

e) aging the material;

f) material defect;

g) vibration;

h) cleaning and disinfection;

i) environmental impact;

j) applies to other design considerations.

By visual inspection, recording information retest, the test conducted by 7.6.102, and further testing is to consider the safety of the subject

Verify eligibility.

7.2.101.2 exception

Laboratory centrifuge for all of the following constraints, only shut down the motor can be used instead of the interlock mechanism of the apparatus (see Appendix

BB).

a) with a laboratory centrifuge device holding the cover closed;

b) Unless the cover is closed, the prohibition means to shut down the motor driving the motor is energized;

c) the rotation frequency of the rotating assembly does not exceed 3600r/min;

Under d) full load, the rotational energy of the highest energy components at frequencies not exceeding the maximum rotation 1kJ;

e) does not exceed the maximum centrifugal force of 2000g;

f) The maximum diameter of the rotating assembly does not exceed 250mm;

g) switching the motor power supply is turned off irrespective of the position of the cover;

h) After the cover is closed rotating assembly should be able to see, so that it can observe the rotation of the rotary assembly of the case;

i) All components used should meet the rotation of the requirements of 7.2 GB 4793.1;

j) when the peripheral speed of the rotating assembly than 2m/s allows access, should be provided at or near a location close to the line with

ISO 3864 warning label to indicate before the rotation stop, not allowed to open the lid; if not provide enough space for the label, can test

Table 1 Symbol 14 considered.

By visual inspection and re-inspection data to identify test satisfy the above-described limit to verify eligibility.

7.2.102 rotating assembly

7.2.102.1 Overview

Under normal conditions or a single fault condition, if the contact with the rotary motion drive system component or components may be dangerous, then

It should provide appropriate protective measures to prevent the operator from approaching. 7.2.101.2 and 7.2.102.2 permitted exceptions.

There should be no upper centrifugal chamber 4mm diameter test pin may pass through any openings.

Under single fault conditions or under normal conditions, and by visual inspection using a test finger (see FIG. B.1 and B.2), and the diameter

Opening test pin 4mm above checks to verify eligibility.

In every possible position, without any external force applied by B. FIG. 1 shown articulated test finger examination. in case

By energizing components become accessible, rigid test finger is applied (see FIG. B.1), while applying a force of 10N. Tests for all foreign

Surface portion, including the bottom. Applying a force to be applied by means of the test finger, in order to avoid or pry the wedging action occurs. Test means not

GB 4793.7-2008/IEC 61010-2-020.2006

Get in contact with any moving parts, to avoid danger.

The need to close during the rotation of the rotating assembly 7.2.102.2

If the manufacturer provides the rotating assembly requires operator interaction (e.g., continuous flow zone or a rotating assembly), allows a laboratory centrifuge

An override exists, that it allows the electric motor when the cover is open accessible, it is assumed.

a) override only the motor is energized by using a device (which may be a card-encoding or encoding), not by using other tools

When achievable measures or when special protective plate can only be close to the rotating component on a limited basis, for possible safety systems and functions

Override.

b) When the operator interaction required rotation assembly, provides a method of automatically cancel override control function.

c) When the lid is opened, it can not exceed the maximum speed 5000r/min.

By visual inspection to verify eligibility.

7.3 Stability

increase.

Add the following third paragraph.

In normal use, relative to its installed position, the centrifuge should not be visible shift occurs.

increase.

Add a new article.

Mobile laboratory centrifuge fault when 7.3.101

According to the manufacturer's instructions after installation, due to imbalance of the rotating assembly, drive failure or damage to the rotary assembly (lock) resulting from the laboratory

Mobile effort is not dangerous.

Should by design, or to restrict the movement of the centrifuge by a method which is fastened to the mounting surface, or a combination of both, so that

All the moving parts of the centrifuge with a laboratory centrifuge outermost end position is not beyond the original defined safety space in any direction

, The value indicated by the manufacturer 300mm or smaller ranges (see Fundamentals BB.2).

By test check to make sure the mobile centrifuge under normal use and the most adverse conditions specified 7.6.101.2 no more than 300mm

Or value smaller range of the manufacturer's instructions to verify eligibility.

a) imbalance;

Note 1.unbalanced due to the sensor as a measure to limit the movement caused by the imbalance, unless the sensor device is a high-integrity, otherwise determined

The most adverse conditions should be considered its possible failure.

b) breakage of the rotary assembly;

c) failure of the drive system;

d) drive system lockup.

Note 2.This failure mode is generated with the maximum displacement of the MCA test 7.6.102 determined based on the failure of the protective cover in different ways.

For the above experiments, a laboratory centrifuge mounted or fixed on the smooth surface of the concrete test level, the size of the test surface is adapted to be

Measuring the size of a laboratory centrifuge, and according to the instructions of the manufacturer.

7.6 parts scattered

instead.

Instead of the original title and the content of 7.6 with a new title and five new strip below.

7.6 pairs scattered parts or components catapult protection

When using the rotating assembly specified by the manufacturer, laboratory centrifuge should be designed to be safe under normal use and single fault conditions

operating.

In the event of damage.

a) in any dimension than 1.5mm rotation assembly components or debris not completely through the protective cover, small material (aerosol

And except liquid) should be controlled in a safe space, i.e., 300mm from the outermost end of a laboratory centrifuge parts in any direction

Range.

GB 4793.7-2008/IEC 61010-2-020.2006

b) laboratory centrifuge can not have removable parts pose a risk to people or the environment.

c) accessible cover not loose fasteners, and you should not have any external laboratory centrifuge and the rotating assembly anywhere

Unobstructed passage is formed between the deformed position.

Under conditions MCA, or portion of the cutting head caused damage or overload of the rotary assembly, or other suitable methods, according 7.6.102

The provisions of test, each centrifuge to test specified by the manufacturer - turned to a combination of eligibility. If there are more than selected rotating assembly

One of the most adverse conditions, each option requires the use of a new protective cover when tested.

After the test, it should satisfy the above a) ~ c) requirements. Should check the visible rupture, in order to determine whether the guard turned around and covering parts,

Regardless of its orbit. Check the results of the problem should be retested again, if the problem still exists is considered substandard. Enter

Test row voltage is 6.8 (without humidity preconditioning), the device checks to determine risk does not become electrically charged parts accessible, and a contact

And conductive parts 6.3.2 does not exceed the limits.

Another alternative method is to centrifuge - Safety rotor may be determined by a combination of analysis and evaluation, analysis and assessment is based

Some have been tested centrifuge - where a rotor combination are compared to determine the protective cover should have been carried out by the

7.6.102 related tests.

NOTE. If the centrifuge design - centrifuge rotor has been tested in combination with another - a combination of the rotor is not satisfactory comparing evaluation results,

Still need to be tested in accordance 7.6.102 of.

Information 7.6.101 MCA tests considered

Information 7.6.101.1 record

Information records should include.

a) the expected effects of corrosion;

b) the fatigue properties of the material;

c) aging material considerations, including repair, maintenance and replacement parts affect the schedule;

d) temperature limit consideration;

e) material defects consideration;

f) considered unsuitable basket mounted;

g) consideration of the relevant environmental;

h) considerations regarding the maximum load;

i) a circuit diagram and functional description;

j) materials specifications and technical data;

k) causes rotation of pretreatment of component failure;

l) during the test traceability of all measuring instruments used;

m) other relevant information.

By examining the above provisions of the relevant documents to verify eligibility.

7.6.101.2 consider the...

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