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Memmert performs testing in line with the stricter standard 12880

01-03-2011 11:37 AM CET | Industry, Real Estate & Construction

Press release from: Memmert GmbH + Co. KG

Temperature distribution when comparing appliances at 150 °C and 50%

Temperature distribution when comparing appliances at 150 °C and 50%

As the very first manufacturer of temperature control appliances, Memmert (www.memmert.com) had signed up to the more rigorous requirements of the current DIN 12880:2007-05 for the temperature testing of ovens and incubators even before the new test standard had come into effect. Memmert now uses this test procedure in its final inspections for all other ovens as well.

“When comparing information of individual manufacturers concerning heating up and cooling down times, temperature homogeneity and temperature stability , as well as the recovery times after the door has been opened, you should always take into account the underlying test standard”, explains Carsten Angermeyer, head of Technology at Memmert.
But even tests using the more rigorous standard do not allow direct conclusions to be drawn about the reliable control behaviour and temperature homogeneity of an appliance during the heating up process. For this reason, Memmert appointed an independent, accredited laboratory to perform a test with appliances from a number of manufacturers in which temperatures were measured over longer periods of time. In all the measured combinations of temperature and fan speed, Memmert achieved the best results. Individual appliances in some cases revealed large deviations over 120 minutes. The test emphatically underlines the quality advantages of heating and control technology developed and individually tuned for specific appliances.

A new standard brings new challenges
For appliances with a working chamber of 50 litres and more, 27 measuring points are now stipulated to ensure that the temperature at all points remains within the limit deviation for the setpoint defined in the standard. The second important modification to DIN 12880:2007-05 also presents new quality challenges to many appliance manufacturers. Until now, performance, meaning fast heating up and cooling down, was the focal point. However, this did not include the time it takes until the temperature has reached a stabilised state, so that it really is controlled reliably. According to the new standard, the times stated for heating up, cooling down and recovery are defined by the point in time when the actual temperature in the centre of the oven or incubator chamber stays permanently within the tolerances defined in the standard.

About Memmert
Already in its third generation, Memmert GmbH develops and manufactures laboratory appliances with more than 150 employees at two locations in Germany. The product range includes devices such as heating oven, incubator, sterilizer, vacuum drying oven, Peltier-cooled incubator, CO2 incubator, humidity chamber, constant climate chamber, climatic test chamber, temperature test chamber, storage chamber, waterbath and oilbath.

The appliances are used for a very wide range of applications, e.g. material testing, component inspection, biological, chemical and food research, quality testing, human and veterinary medicine.

Responsible for content
Angelika Henneberg
Memmert GmbH + Co. KG
Äußere Rittersbacher Str. 38
91126 Schwabach, Germany
Telefon +49 (0)9122 925-0
ahenneberg@memmert.com
www.memmert.com

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