Re: [PSES] Fischer CC EM Clamp F-203I-32mm

Tue, 20 Nov 2012 15:28:03 -0800

I've noticed that when people don't understand a test, they often try to make it conform to every detail in the standards, prescripitve or  or not.
 
If it really mattered, I suppose one could turn the clamp sideways...


Cortland Richmond
-----Original Message-----
From: "Kunde, Brian"
Sent: Nov 20, 2012 12:15 PM
To: EMC- PSTC
Subject: RE: Fischer CC EM Clamp F-203I-32mm

Wendy,

 

Who makes an EM Clamp that has a cable entry of 30mm? The size of the cores needed to handle a cable diameter of any size will be large enough to make this difficult if not impossible. Plus you have to have room for the input ‘N’ connector mounted under the cores.

 

I have never seen an EM Clamp where the cable entry wasn’t 50mm or greater though I’m not saying one doesn’t exist. Typically they are more like 75mm.

 

I don’t know where your supplier got this requirement.  I don’t have the latest version of the 4-6 standard but the copy I have only states in section 7.2, “The cable between the AE and the injection clamp shall be kept between 30mm and 50mm above the ground reference plane”. The text doesn’t say anything about the height of the clamps or the cable height between the clamp and EUT, though the picture in figure 6 shows it as 30mm.

 

I don’t see where the short distance the cable has to run higher than 30-50mm coming in and out of the clamp would have much impact on the test results.

 

The Other Brian

 

From: [email protected] [mailto:[email protected]] On Behalf Of Wendy Nya
Sent: Tuesday, November 20, 2012 7:50 AM
To: EMC- PSTC
Subject: Fischer CC EM Clamp F-203I-32mm

 

Dear All,

 

We have a very old Fischer CC F-203I-32mm EM Clamp. A supplier pointed out that it does not comply to the 61000-4-6 standard's requirement - the height of the cable entry is more than the standard's requirement of 30-50mm.

 

I just checked Fischer CC website. They are still selling this model. Is anyone still using it?

 

Regards,

Wendy

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