Table 3-2. Organizational Preventive Maintenance Checks and Sew ices (Continued)
W - Weakly
M - Monthly
Item to be Inspected
TEST AMMONIA SUPPLY (CONTINUED)
Gently squeeze hydrometer (4) bulb. Then place
hydrometer tip in ammonia and release bulb
slowly until ammonia covers colored beads inside
hydrometer. Do not draw ammonia up more than
2/3 of the hydrometers length.
Hold hydrometer (4) in vertical position. Reading
is accurate only when hydrometer is vertical.
Count number of floating beads (5). The more
beads floating, the weaker the ammonia solution.
If three or more beads are floating, the
ammonia must be replaced with a fresh bottle.
No. of Floating Beads