|
|
       CODE: 775.584-010 Buy the DOT:Download/CD-ROM
TITLE(s): GLASS CALIBRATOR (glass products) alternate titles: engraver
Measures, marks, and etches units on side of glass tube (pipettes) or similar measuring devices,
using calibrating device and solution of hydrofluoric acid: Fills tube with specified quantity of
mercury and marks meniscus of mercury with special pen. Covers tube with wax. Positions tube in
calibrating device, aligns needle guide with calibrated ruler, and turns locknut to hold guide in
place so that exact measurement can be marked, starting from meniscus. Turns handwheel that moves
needle in back-and-forth motion to remove wax and expose glass to be etched with acid. Realigns
needle guide to next unit to be marked and continues sequence until tube is calibrated. Removes tube
from calibrating device and dips it into solution of hydrofluoric acid so that acid will permanently
etch area of glass not covered with wax. Rinses tube in cold water to remove excess acid and in hot
water to remove wax.
GOE: 06.02.31 STRENGTH: L GED: R3 M2 L2 SVP: 3 DLU: 77
ONET CROSSWALK: 93951B Etchers, Hand
|
