At 11:51 AM 2/5/97 -0500, [email protected] (Doug McKean) wrote: >Patrick Lawler wrote: >> Recently, I asked a question concerning harmonic specifications and a >> system containing a 120W switching supply in parallel with an intermittant >> 450W resistive heater. I came up with two positions that support harmonic >> measurement while the resistive load is powered on (the system passes test >> under these conditions). ------<snip>------ > >When someone asks me a question such as this, I always back up to - >What is the purpose of using this product? > >Once past this point it's easy to decide what is the "Normal Operating >Condition" and from there which 'worst case' scenerio.
BTW, my company makes the 120W switching supply, and we would like to sell it to a customer. Our salesman indicated that the customer's product was some variety of medical imaging equipment (I don't know if it's 'live' imaging, film-to-disk scanning, or ???). Therefore, the 'resistive heater' I mentioned in the beginning is actually a high-power lamp. Considering the typical efficiency of an incandescant lamp, it might as a well be a resistive heater. :) Pat Lawler <[email protected]>
