When you send in either your camera or point radiometer back to the vendor on a yearly basis for the recommended standard calibration, do they actual re-calibrate the unit even though it is found to be within calibrated specs? Or do they just simply re-issue a calibration sticker or certificate without making adjustments if the unit is still OK?

Also, do they even check to see if the unit is still calibrated or do they just simple go ahead and re-calibrate it without even verifying if it is still within calibrated specs?

Thanks