[pedant]kV, mA, mAs[/pedant]
Yes; you need to think again ... (as is the general case with all medical equipment) it's the actual effect at the patient that really matters. For example, it's no good measuring mA within the tube circuit if the collimation is out of alignment (or even jammed shut)!
Measurements within circuitry are almost certainly going to be needed when fault finding - but probably not when simply proving output - QA, whatever. Depending upon the level of testing you are hoping to offer (or your customers require), a few radiographs using a step wedge may suffice. Bottom line there is (as with ultrasound imaging), it's the quality of the image that matters.
If you feel the urge to start re-calibrating x-ray tube output(s), make sure you have the full (and correct) service manual(s) to hand!
On the question of Inspection Sheets ... is the stuff at the FDA link I gave of no use?
Finally, regardless of Jobsworths sticking their noses in whilst you're at work, you will still find a step ladder very handy. And, on the subject of Jobsworths, don't forget to offer some sort of warning to advise folk to keep out when you're merrily exposing away! That applies to having high voltage cabinets open, as well.
