Directive-compliant heating mantles in accordance with the latest EU Standard

In October 2013, the EN Standard 61010-1:2001 that had been in effect until then (Safety Regulations for Electrical
Measuring Instruments, Control Devices and Laboratory Equipment. General requirements) was withdrawn and the new
EN Standard 61010-1:2010 (Safety Regulations for Electrical Measuring Instruments, Control Devices and Laboratory
Equipment. General requirements) came into effect. This change affects all heating mantles as important basic laboratory
equipment

• Extension of the Standard's scope of application from devices for industrial use to the area of private use
• The requirements for the insulation of the devices has been completely revised
• Additional requirements regarding protection against mechanical hazards have been updated in the Standard´s text
• Apart from the requirements concerning ergonomic aspects, the requirements with regard to predictable misuse by the user of the devices has been revised
• Extension of the Standard by a separate section about hazards and environments which were not covered by the previous Standard
• For statements dealing with the problem of risk assessment, please refer to appendix.

The heating mantles have been designed and manufactured in accordance with the safety regulations in accordance with EN 61010-1:2010

The HM series heating mantles differ from those of other well-known manufacturers due to their unique heating element design.

Ordinary heating mantles from other manufacturers use a copper wire woven into a fiberglass material as the heating element. This fiber material is bent into a basket shape to accommodate the round glass bulb. The glass wool does not protect the copper wire from liquid penetration, which in turn requires the element to be preconditioned with moisture in order for it to pass the solid insulation and voltage tests described.

Our heating mantles feature an electrical element contained in a fully insulated shell. Should a liquid enter the jacket, the element is fully protected by this insulation and is therefore not affected by such an event.

The HM Series meets the solid insulation and voltage testing requirements as described in Sections 6.7 and 6.8 of the filed patent applications.

11.3 Spillage

If, in NORMAL USE, liquid is likely to be spilt into the equipment, the equipment shall be designed so that no HAZARD will occur, for example as a result of the wetting of insulation or of internal uninsulated parts, or as a result of the contact of potentially aggressive substances (such as corrosive, toxic or flammable liquids) with parts of the equipment.

If in NORMAL USE potentially aggressive substances(such as corrosive, toxic or flammable liquids) are likely to be spilt on parts of the equipment, the wetted material should be analyzed to determine compatibility with the aggressive substance. Conformity is checked by inspection. In case of doubt, 0.2 l of water is poured steadily from a height of 0.1 m over a period of 15s onto each point in turn where liquid might gain access to electrical parts. Immediately after this treatment, the CLEARANCES and solid insulation should pass the voltage tests of 6.8 (without humidity preconditioning) applicable to the type of insulation (see 6.7) and ACCESSIBLE parts should not exceed the limits of 6.3.1.

11.4 Overflow

Liquid overflowing from any container in the equipment which can be overfilled should not be able to cause a HA?ZARD during NORMAL USE, for example as a result of the wetting of insulation or of internal uninsulated parts that
are HAZARDOUS LIVE.
Equipment likely to be moved around, while a container full of liquid is placed inside should be protected against li?quid surging out of the container. Conformity is checked using the following treatment and tests. The liquid container
is completely filled. A further quantity of liquid equal to 15% of the capacity of the container or 0.25 l, whichever is
the greater, is then poured in steadily over a period of 60 s. If equipment is likely to be moved while a container full
of liquid is placed inside is then tilted 15° in the least favorable direction from the position of NORMAL USE. Immedi?ately after thistreatment, the CLEARANCES and solid insulation should passthe voltage tests of 6.8 (without humidity
preconditioning) applicable to the type of insulation (see 6.7) and ACCESSIBLE parts should not exceed the limits.2
1 BS EN61010-1:2010 is the British version of the EU Standard EN 61010-1:2010. 2 Source: BS EN61010-1:2010. The correctness of this text is not warranted.

For the original wording, please refer to BS EN61010-1:2010, page 91 in Section 11.3 "Spillage" and Section 11.4 "Overflow"

1.Source and additional information at: www.tuv.com

2 Source and additional information at: www.vde-verlag.de