Hello Bob, It sounds like you have an Inductrial, Scientific, Medical (ISM) device, which would require you to test to EN55011 (Emissions) and EN 50082-1 (Immunity). Although the EN 50082-1 standard is not for ISM equipment directly and, as pointed out in another post, there is no specific standard published in the OJ yet for a "Goop Mixer", you could choose to classify it as light inductrial.
As to whether to classify it as class A or B for emissions, you could classify it as Class A, although you should not have any problem meeting the Class B limits based on the description you gave of the device. Also note that there is a new standard about to be listed in the OJ which would supercede the above. It is EN 61326-1 (EMC Requirements for Measurement, Control, and Laboratory Use). There is a debate currently ongoing as to when this standard becomes mandatory. The current proposal is within three months after notification in the OJ (possibly by the end of this year), however, three years is likely to be the case. Either way, if you meet the requirements of the previous standards, you should have no problem meeting the requirements of EN 61326-1. Although your question was specific to the EMC Directive, you should also show conformance to the Low Voltage Directive, prior to "CE Marking" your device, in which case EN 61010-1 would also apply. Andy Garcia Lead EMC Safety Engineer Coulter Corporation [email protected] wrote: > Good Day List, > > I am trying to determine what tests apply under the EMC > directive to a piece of chemistry lab equipment. The device > is a small table-top "agitator" to mix up containers of "goop". > (note my chemistry terminology is limited.) > > The device in question has a variable speed 24VDC motor > controlled by pulse width modulation. The PWM chopper > operates around 20 kHz. The device plugs into a wall > outlet (120VAC or 240VAC) There are no microprocessors, or > any digital electronics in the device. > > My experience has been in ITE testing, using the ITE emissions > standard and the Generic Immunity Standard. I expect the > Generic standards (emissions & immunity) would apply to the > "goop mixer". Does this sound correct? Does the Generic > emissions standard essentially boil down to EN 55022? > > I suspect this last question may be slightly controversial: > Assuming that EN 55022 applies, would this be a Class A or > Class B device? The device is sold only to educational / > research facilities, not the general public. > > Any opinions would be most appreciated. > > Thanks in advance, > Bob Sykes
