BATTERIES: BATTERY SPECIFIC GRAVITY CHECK, REMOVAL AND INSTALLATION (CONTINUED)
WARNING
Do not look into the infrared (blackout) light. If
using headlight as a light source, look into white
light only. Infrared light can damage the eyes.
E
NOTE
A little experience will enable you to obtain
quickly the best contrast between light and dark
positions of field of view. Tilt instrument toward
light source until best results are obtained. If
edge of shadow is not sharp, measuring surface
Point instrument toward any light source (headlight) and
was not sufficiently cleaned or dried.
look into eyepiece (6). Battery charge is at point on left-
hand part of scale where dividing line between light and
dark (shadow) crosses line.
TA311074
6-43
TM 9-2350-267-20
