Figure 2-6. FLOWMETER application.

TM 3-6665-225-12

k. Disconnect power source from the 24 VDC

cover (4, fig. 2-6). Press down on top of FLOW-

INPUT connector (11, fig. 1-2) of M43 detector unit.

METER. Ball (6) must rise and float within correct

Position M42 alarm unit selector switch (8, fig. 1-5)

zone for ambient temperature (fig. 2-6).

to HORN ON or connect wire to M43 detector unit

i. Press and hold ZERO ADJUST knob (5, fig. 2-1)

REMOTE binding post (17, fig. 1-5).

in. Press in hand crank (2), rotate crank clockwise

l. Remove protective cap from sensitivity check

50 turns, and release it.

bottle (6, fig. 1-6). Unscrew AIR FILTER plug (4, fig.

NOTE

2-4) and remove air filter (3).

Keep hand crank in down position, not

m. Invert sensitivity check bottle, and, while

pressed in.

holding dropper tip 1/2-inch over center of black

j. Press and rotate ZERO ADJUST knob (5) until

side of filter material (2), allow two drops of solu-

meter (1) indicates in ZERO ADJUST zone (blue).

tion to fall on filter.

Release knob. After 5 minutes, press and reset, if

n. Immediately replace air filter (3) in M43

necessary.

NOTE

If new detector cell was installed (para

2-6a(5)), M43 detector unit must be allowed

to operate for 1 hour to stabilize detector

cell before proceeding.

2-7

Change 2

Figure 2-6. FLOWMETER application.