A-A-50060C
3.1.3 Knife edge. The knife edges shall be made of hardened steel and accurately ground.
3.1.4 Bearings. The bearings shall be made of agate. The bearing blocks shall be self-aligning to ensure continuous contact along the knife edges.
3.1.5 Poises. The poises shall be of the center-reading sliding type.
3.1.6 Pointer. The pointer shall be easy to read.
3.1.7 Dust cover. Each balance shall be supplied with a dust cover of sufficient size to completely cover it.
3.1.8 Damping. The damping system shall be friction free and self- adjusting.
3.1.9 Instructions. Each balance shall be furnished with two copies of instructions for installation, operation, and maintenance, as well as a list of component parts.
3.2 Sensitivity and beam graduations.
3.2.1 Type I. Type I balances shall have a zero load sensitivity of 0.1 gram/0.0035 ounce (avdp) per graduation, and a full load sensitivity of 0.2 gram/0.0070 ounce (avdp) per graduation, and a capacity of 2000 grams/5.1 pounds. The beam shall be graduated in 0.2 gram and 0.1 ounce divisions.
3.2.2 Type II. Type II balances shall have a full load sensitivity of 0.2 gram and a capacity of
2000 grams. The upper beam shall be graduated from 0 to 10 grams in 0.1-gram divisions while the lower beam shall be graduated from 0 to 200 grams in 10-gram divisions.
3.3 Nameplate. A permanent nameplate shall be attached to the product. Unless otherwise specified in the acquisition order (see 7.4 (c)), the nameplate shall display the following information:
a. Nomenclature
b. Manufacturer's name
c. Manufacturer's model designation d. Balance type (see 2)
e. National stock number (if specified)
f. Contract or order number (if specified)
g. Date of manufacture (if specified)
2
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