Mich. Admin. Code R. 285.548.3 - Cherry gauge rods
Rule 3.
(1) The
indicating means shall consist of a calibrated gauge rod and level indicating
plate.
(2) The rod shall be of
rigid design, made of stainless steel smoothly finished with the probe and
tapered to 1/2 inch, and, when properly seated in position, shall touch the
bottom of the holding tank being measured. The rod shall be graduated
throughout an interval corresponding to the range within which readings of the
cherry level are to be made.
(3) On
a rod the spacing of the graduation center to center shall be not more than
.0625 (1/16) inch and not less than .03125 (1/32) inch. The graduation shall be
not less than .005 inch in width and the clear interval between adjacent edges
of successive graduations shall be not less than .015625 (1/64) inch. The
graduations shall be designated in inches, 0.5 inches, 0.1 inches, and 0.02
inches.
(4) The level indicating
plate assembly shall consist of a rigid plate and a slider tube designed to
move up and down the calibrated gauge rod. The rigid plate shall be a
perforated round disk of stainless steel, 10 inches in diameter, with the
perforations not exceeding 3/8 inch in diameter. The plate shall be permanently
attached to the slider tube. The slider assembly shall move freely on the gauge
rod without slip and shall weigh 4 pounds, plus or minus 1/10 of 1%.
Notes
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