Abstract: A method for calibration and correlation of flying height testers with a calibration slider. The calibration slider has an air bearing surface that contains a flat portion and a sloped portion. To verify accuracy and correlation between flying height testers, the calibration slider is loaded adjacent to a rotating transparent disk of a tester. The slider is separated from the disk by an air film and flies at a zero pitch angle. Zero pitch angle can be attained by adjusting the rotational speed of the disk. The flying height tester includes an optical system which can measure the air film with a light beam that is directed through the disk and reflected from the slider.

Abstract: A refrigerator having an outer case and an inner liner with insulation therebetween, the inner liner forming a fresh food storage compartment. An evaporator is disposed in the upper portion of the fresh food storage compartment. There is an elongate opening in the rear wall of the fresh food storage compartment and a drain trough is disposed on the interior surface of the rear wall below the evaporator and the elongate opening. A cover member is positioned in and covers the elongate opening, which cover member has a peripheral flange abutting the interior surface of the rear wall and a recess body portion extending through the elongate opening. There is provided a centrally located opening in the cover member and a trough on each side of the opening along the upper portion, both of which are arranged to underlie the exterior surface of the top wall of the inner liner.