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Subject: Re: x-ray transformer terminal identification

Date: 03/23/01 at 4:49 PM
Posted by: Mike Gray
E-mail: mike@amerytel.net
Message Posted:

In Reply to: x-ray transformer terminal identification posted by Bill Disantis on 03/20/01 at 12:39 AM:

Hi Bill,
I could only take an educated guess at it, since my experience is with dental (stationary anode) tubeheads. Medical X-ray systems are quite different.
"G" is most likely Ground. "MA" is the terminal that monitors the tube current draw. Some controls use the MA as feedback to stabilize the X-ray output, and
on some systems it is simply to check the tube current during service and calibration. When this MA terminal is not being used for monitoring the tube current, it
should be grounded. Most rotating anode (medical) X-ray tubes have two filaments. One is for a small focal spot, and the other is for a large focal spot. So, I'm guessing
that the "XFS" terminal would go to the small filament, and the "XFL" would go to the large (or Long) filament. The "XFC" is probably the common connection for both filaments.
I really don't have a clue what the A and AA are for. I can guess that they might be for the input (120 or 240 VAC) power.

You might be able to get accurate information by contacting a medical X-ray repair service. You should be able to find something on the web.

Regards,

Mike Gray


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