Manufacturer information on stability and homogeneity of temperature do not allow for direct conclusions about the reliable control behaviour and temperature homogeneity of an appliance during the heating up process. This is the result of a test performed by an independent accredited test laboratory.
- The Memmert top perfomer is convincing in every respect: steady and gentle heating-up, uniform temperature distribution, excellent stability
An increasing number of manufacturers of ovens and incubators now proudly claim in their technical data sheets that their appliances are tested in accordance with DIN 12880 DIN 12880, which was tightened up in 2007. Yet all these measurements were done once and do not necessarily allow conclusions to be made about the control behaviour of an appliance over longer periods of time. In order to reproduce processes at any time, however, reliability in temperature stability and uniformity in daily routine with a heating oven is a basic requirement. This also applies especially to the heating-up phase. The test setup was therefore also based on DIN 12880:2007-05, the standard by which Memmert has been testing all its temperature control chambers for more than three years.
- Test result for a competitor without large-area all-around heating and specific temperature control: no optimum temperature uniformity and stability after heating-up.
- Temperature distribution when comparing appliances at 150 °C and 50% (curves represent the divergence of the most deviating measured values out of 27 measuring points)
- Memmert complies with the specifications of the standard even without forced air circulation, due to the wide-area heating of the interior.
- Heating systems (like ring heaters), that do not heat large parts of the chamber walls, utterly fail without forced air-circulation: this competitor could not fulfill the requirements of the DIN 12880 at any time during the measurement.
- Temperature distribution when comparing appliances at 150 °C and 50% (curves represent the divergence of the most deviating measured values out of 27 measuring points)
Measurements of the temperature progression in five technically comparable appliances provide emphatic proof of our competitive edge. The Memmert oven UFP 500 was the overall winner of the test, with temperatures of 50/150/250 °C and fan speeds from 0 to 100%. In its November 2010 edition, the laboratory magazine GIT reported in detail on the outstanding test results of the UFP 500.
Most notably without a supporting fan, some of the appliances from competitors display large deviations in temperature, whereas in the UFP 500, the temperarture distribution is still very good, and in all cases standard-compliant, even when the fan is switched off (0%). Our appliance-specific heating and control technology, especially the large-area all-round heating, consistently guarantees for constant control precision and temperature uniformity.
We would be pleased to present the detailed test results to you in person. Please get in touch with us at sales@memmert.com.
