Operating Instructions - TM-5-6640-213-140062

TM 5-6640-213-14

(b) Operating Instructions. Operate as follows:

1. Using 3/8-in. plastic or rubber tubing,

connect the inlet hose nipple, at the bottom of the organic removal

cartridge to the water supply. Connect the outlet hose nipple at the

top of mixed resin cartridge to a suitable water container.

2. The basic limiting factor on flow rate is

pressure (25 psig (1.76 kg/sq cm) design). The normal optimum flow

rate is 10 gph. The direction of flow of the water through the

cartridge must be from the bottom upward.

3. Water or other solutions purified by ion

exchange resins are not necessarily free from odor, color or taste,

which may make them unsuitable for some purposes. In some instances

color, taste, or odor may be introduced to the finished product by

trace quantities of either free amines or low molecular weight poly-

mers which are present in the fresh, untreated resin. Generally,

the amine odor will lessen or disappear after passage of a few

gallons of water through the cartridge.

(15) Aneroid Barometer.

(a) Description.

1. The wall-mounted aneroid barometer (29, fig.

1-3) has a scale calibration of 26 to 31 inches (660 to 787 cm) hg

and a pressure graduation of 0.10 inch (0.023 cm) of hg. It is 5

inches (12.7 cm) in diameter and has an overall depth of 2.5 inches

(6.35 cm).

2. The basic unit used in the barometer is a

round, thin metal box fitted inside a clamp in the form of a C. The

clamp is called a C-spring. The metal box, or bellows, it sealed

after practically all of the air has been removed. At this point the

bellows would collapse due to the air pressure pushing against it

from the outside. The C-spring keeps the bellows from collapsing

since it holds the sides of the metal box apart and in balance.

Changes in air pressure disturb this point of balance in respect to

the atmosphere, and each slight movement is transmitted to the

barometer pointer which is positioned over a dial graduated in 1/10

inches (0.254 cm) of mercury.

2-38