As the manufacturer you have to decide what a typical operator position is, 
then document it in the report. We give a distance from the front of the device 
(varies from 200cm - 500cm) and a distance off the floor (or off the table for 
table mounted equipment).

For the bystander position, we take measurements on all four sides at a 1 meter 
distance and 1.6 meters off the floor.

The Other Brian


From: [email protected] [mailto:[email protected]] On Behalf Of Doug Powell
Sent: Wednesday, April 25, 2012 12:47 PM
To: emc-pstc
Subject: IEC/EN 61010-1

The in the acoustics section 12.5 of 61010-1 are the concepts of operator and 
bystander positions.  The standard clearly states dimensions for the "test 
room", yet it does not clearly state what distances are for personnel.  Let's 
assume a control panel is mounted in a rack system, at eye-level, and with 
buttons that must be pressed. What would be the typical distances for the 
operator and the bystander?

For the bystander, 1 meter seems about right.  In the past, I have seen as 
little as 12 inches for the operator, but this seems a bit close.  My original 
thought was this may represent a person leaning with one shoulder against a 
rack mounted panel.  While the distance from the panel surface to the ear of 
this person can be quite short, it is not likely to be an operator's position.

A difference of only a few inches can make all the difference in your results.


--
Thanks, -doug

Douglas E Powell
[email protected]<mailto:[email protected]>
http://www.linkedin.com/in/dougp01


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