TM-9-2350-311-20-1 Maintenance Manual for Volume 1 M109 Hull Download
Page 722 of 1275
3 Use black dipstick (5) to obtain a small sample of battery acid. 4 Place a few drops of acid onto measuring surface (3) through opening in cover plate. 5 Point instrument toward any light source (headlight) and look into eyepiece (6). The battery charge is at a point on the left part of the scale where the dividing line between light and dark (shadow) crosses the scale. NOTE A little experience will enable you to quickly obtain the best contrast between light and dark portions of the field of view. Tilt the instrument toward the light source until the best results are obtained. If the edge of the shadow surface was not sufficiently cleaned or dried. is not sharp, the measuring b. Removal WARNING • Battery gases can explode. Do not smoke or allow sparks or open flames near batteries. Wear safety glasses or goggles when checking batteries. Failure to follow this procedure could cause serious injury or death. • When working on batteries, wear eye protection and remove all jewelry, dog tags, and metal items to avoid electrical shock and bums. CAUTION When removing batteries, always disconnect ground leads first to prevent damage to batteries. 8-77 TM 9-2350-311-20-1