Figure 3-8. Tare Ring and Tare Boat.

TM 5-6640-213-14

1. Tare ring

2. Tare boat

3. Tare ring notch

Tare Ring and Tare Boat.

(j) Replace the hood and check the zero. Calibrate.

if necessary. Readjust the sensitivity since thee enter of gravity

may have shifted in a vertical direction because of the displacement

of the large zero screw. (See a.(7) above for adjusting sensitivity.)

NOTE

All removed parts, including plastic shroud, card-

board and plywood blocks should be retained for use

when preparing to move the laboratory. Place all

the parts in the carton and store in the cabinet

location indicated.

Cleaning.

(1) Weights. From time to time the weights of the balance

should be cleaned with the camel's brush or chamois leather.

(a) To remove the weights, arrest the beam and take

off the hood. Move all the knobs to the maximum setting so that the

scales show 99.9999.