![]() To be used for buying and selling goods, a 1.82-meter (6-foot) tape should be accurate to within 0.79 millimeters (1/32 inch), according to NIST Handbook 44, a sourcebook for many measurement standards. If the tape is accurate to within an acceptable tolerance, it passes the test, and the batch that it comes from can be sold. Scientists at NIST use a microscope to calibrate tape measures.Īs the microscope moves over the tape, manufacturers can compare the position of the hash mark on the tape with the distance reported by the interferometer. The measuring beam bounces off the reflector and rejoins the reference beam back at the detector. One of the beams, the reference beam, goes directly to a detector, while the other, a measuring beam, goes toward a reflector on the side of the microscope. Laser interferometers work by splitting a laser beam in two. The manufacturer aims the microscope at the tape’s hash marks and moves it from one end of the tape to the other.Īt one end of the bench is a device called a laser interferometer, which can precisely measure distances along the tape. Alongside the tape is a microscope, mounted on a moving carriage. They run the tape along a flat bench, holding it tightly in place with a specific tension from a mechanism or weight. Once the tapes are printed, manufacturers check random samples for accuracy. Some are printed using computer-controlled ink printers with tiny printheads to ensure the markings are laid down accurately. Some manufacturers use highly accurate reference tape measures to print their familiar hash marks on the tape. These length measurements and many others are often made with the help of a measuring tape. Send us feedback about these examples.You need to measure length accurately to do things like make a dress, build a house, survey a plot of land, or determine if the home team made a first down on the football field. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'tape measure.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Alyssa Gautieri, Good Housekeeping, 4 Oct. 2022 Blogger Alicia Larie walks through a simple tutorial using only six or seven skeins of yard, a tape measure and scissors. Rachel Chason, Washington Post, 17 Nov. 2022 Holding a clipboard, Grodje scrawled down measurements as Miller worked the tape measure. Bradley Ford, Popular Mechanics, 18 Nov. 2022 Pull the bird out and use a tape measure to check how deep the oil needs to be. 2022 An arena worker brought out a ladder, tape measure and level. José Ignacio Castañeda Perez, The Arizona Republic, 26 Aug. 2022 As part of the first rehabilitation phase, officials cleaned out a portion of the pipeline and accumulated a pile of hefty rocks, old pipes, a tape measure and a shattered rusty manhole cover that were clogging the pipe. 2023 All projects start with the layout and a good tape measure makes this step quick and easy. Roy Berendsohn, Popular Mechanics, 6 Feb. 2023 Plus, there’s still room in the 5-gallon bucket for a speed square, a tape measure, and a carpenter’s pencil. Recent Examples on the Web The Cowboys’ head coach used a tape measure instead.
0 Comments
Leave a Reply. |