Scope of calibration service at each of our 16 accredited calibration laboratories is shown below. The stage micrometer is 1mm long divided into 100 units, each unit is. Hold the mic squarely with the work or false readings will result. Table a1 states accuracy for various resolution and range micrometers. In the picture above the eyepiece reticle is 10mm long divided into 100 divisions with major markings every 1 mm. E1 1 introduction this procedure describes the steps taken when calibrating vernier calliper gauges of any dimension. Calibration procedure for inside micrometer, micrometer heads, calipers and depth micrometers, t. These readings are then used to calculate the calibration factor for each objective. Please read this manual thoroughly before use for proper operation.
Calibration frequency for micrometers free pdf ebook. Outside micrometer calibration purpose the purpose of this procedure is to provide general instructions for the calibration of outside micrometers with vernier, digital, or combination scales. Held for calibration and segregated from use until the calibration effort is completed. Stop using a caliper that fails to meet calibration. Depth micrometer calibration purpose the purpose of this procedure is to provide general instructions for the calibration of rod type depth micrometers. Method b outlines the calibration procedure using a micrometer fixture. Micrometer calibration micrometer calibration services. Calibration of microscopic ocular micrometer youtube. Standard inventory example excel docx pdf 12 standard operating procedure selections may 2019 docx pdf ensuring traceability. The calibration procedure was performed on a 4 mw wind turbine test bench and the evaluation of the calibration result, including a measurement uncertainty, is explained in detail.
It is wise to assess the situation before the calibration process. Ocular micrometer the ocular micrometer is a glass. When close measurements are necessary, the micrometer is the ideal tool for the job because measurement and reading are on the same axis and the anvil end is supported by a strong frame. This method provides instructions for accurate readings of the caliper so that when using the caliper. The only item required to perform an accurate calibration is a stage micrometer.
Calpro is a database of complete stepbystep calibration procedures covering more than 60 types of measuring devices, from gage blocks to micrometers and calipers. Use the same procedure you used to test the calipers with a micrometer set at 1 inch. Clean the outside micrometers measuring surfaces and the gauge blocks to be used. When a pair of calipers just isnt accurate enough i. Pdf 9 equations for metallic tapes oct 2014 doc pdf 10 understanding factors affecting weighing operations may 2019 docx pdf 11 assignment and adjustment of calibration intervals for laboratory standards may 2019 job aids. This procedure describes the calibration of outside micrometer and micrometer.
Activities to reduce variation in product output by a process and keep. Clean the depth micrometer s measuring surfaces and the gauge blocks to be used. Sop 6 calibration of vernier calliper gauges issue no. Calibration start obtain standard gauge blocks keep micrometer in stable room temperature before starting calibration hold micrometer from its heat isolation plate spin ratchet anticlockwise until enough space. This procedure describes the calibration of outside micrometer and. Acs calibration has the experience and capabilities to meet your micrometer calibration requirements. Calibration and related measurement services of the. Zero the outside micrometer at the start and adjust as required by the. The good laboratory practices glps, good measurement practices gmps, and standard operating procedures. Calibration procedure for calibration of external micrometer. Micrometer calibration standards msc industrial supply. Pdf calibration procedure and measurement uncertainty for. This certificate shall not be reproduced, except in full, without the express written permission of caltech, inc. In accordance with established procedure, the munitions board standards agency has designated the ordnance corps, the bureau of ordnance, and the air force, respectively, as joint custodians of this standard.
This is critical because these records will help you conduct similar calibration procedures in the future. An oddfluted tap can be measured using a vanvil micrometer and a single wire in contact with the thread flanks. Calibration shall be performed in an environment that conforms to manufacturer specifications. Both the measuring instrument and the object being measured should be. Calibration of the ocular micrometer using the stage micrometer. Calibration start obtain standard gauge blocks keep micrometer in stable room temperature before starting calibration hold micrometer. To make sure your micrometers are calibrated accurately, you should have them done by an accredited calibration lab. Also instructions are given to position the optical switch blocker ring so that it does not cause the micrometer to become jammed. Our technicians have years of experience with precision measurement of dimensional hand tools and work with stage micrometers, depth micrometers, inside and outside micrometers, digital micrometers, thread micrometers, anvil or blade micrometers. The national bureau of standards was established by an act of congress on march. Sif file format retains all calibration and measurement information. Furthermore, highperformance digimatic micrometer head, 0. This calibration procedure will cancel a zero error.
This procedure provides specific instructions for the verification, calibration, and maintenance of mechanical and electrical measuring and testing equipment to ensure its proper functioning. A standard oneinch micrometer has readout divisions of 0. Using the iso guide to the expression of uncertainty in measurements to determine calibration requirements. Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass, length and volume calibrations for field.
Micrometer calibration iso17025 calibration, repair. Ive always used 33k64151 for micrometer calibration. The original table of contents and several legacy sections are provided here as reference only. Pdf micrometers are essential instruments for measuring external sizes of physical objects. Before making a measurement or calibration, confirm that the plunger moves. In short, check if it is good enough for its intended use. Find micrometer calibration standards at msc industrial supply, serving the metalworking, safety, and mro industries for over 75 years. Digital depth micrometers only need one scale to be verified. Calpro can also be used without gagetrak as a library of work instructions for inclusion.
The calibration due date appearing on this certificate and calibration label are solely determined by the customer and do not imply continued conformance to specifications. Scope this general procedure shall be used in the absence of any specific calibration procedure for outside micrometers. Calibration of environmental monitoring standards by direct comparison. Clean the depth micrometers measuring surfaces and the gauge blocks to be used. Clean the outside micrometer s measuring surfaces and the gauge blocks to be used. Calibration procedure for inside micrometer, micrometer. When you look through the ocular of a lm you will observe a circular field of view. Zero the depth micrometer at the start when placed directly on the granite plate. Materials compound light microscope stage micrometer or calibration grid the following procedure explains calibration of a microscope with 10x eyepiece lenses and 4x, 10x, 40x and. Calpro sample procedure cp02e outside micrometer and micrometer head sample procedure 2 standards and calibrating equipment. If the micrometer needs repairs, they must be done first. Stepbystep calibration procedures quality magazine. Standards and equipment used must have a valid calibration certificate 2.
If there is visible damage and the micrometer has been dropped, there is a higher chance that it will have to be repaired professionally. Small tool instruments and data management calibration. Micrometer calibration national physical laboratory. Sep 01, 2015 per the request of multiple viewers, i have put together a video detailing the basis of using, caring for and calibrating micrometers as used in a machine shop for precision measurements. Micrometers can be found in many different quality departments.
Any or all procedures can be imported into gagetrak calibration management software using the provided import utility or they can be printed as hard copy. Outside micrometers gauge block set for micrometer inspection 10 optical parallels 10 optical flats 10 micrometer standards 11 micrometer stand 12 colorcoded ratchet 12 micrometer oil 12 inside micrometers cerainside microchecker 12 setting rings holtest threepoint internal micrometers borematic threepoint internal micrometers. We move the stage micrometer so that both the ocular and stage micrometer parallel to each other. Grasp the micrometer frame in your palm and turn the thimble with your thumb and finger. Alternatively, an ocular and stage micrometer may be used.
For depth tis, set zero with the shortest available rod. The 7151 is a comprehensive kit for dimensional calibration applications including verniers, calipers, micrometers, and depth gauges. Length measuring elements such as micrometer screws, dial micrometers. When repeated deviations from this standard are required by a depart. Outside micrometer calibration procedure memorial university. Calibrating measuring instruments reference gages and. This general procedure shall be used in the absence of any specific calibration procedure for rod type depth micrometers. In the case of the absolute digimatic caliper electrostatic capacitance model. Procedure preliminary instructions and notes read this entire procedure before beginning the calibration.
Traceability of the accuracy of measuring instruments put its basis on the calibration. Alliance calibration is iso 17025 accredited for micrometer calibration up to 36 inches and caliper calibration up to 120 inches. A qualified calibration lab can perform that procedure for you if the need arises. For additional information on checking your tape measures accuracy and calibrating your tape measure, visit our calibration procedure. May 16, 2012 such as files in the cove members directory. The dept micrometer will hereafter be referred to as the instrument under test iut. Selection and use of sensitivity weights and tare weights in weighing procedures june 2019. Our technicians have years of experience with precision measurement of dimensional hand tools and work with stage micrometers, depth micrometers, inside and outside micrometers, digital micrometers, thread micrometers, anvil or blade micrometers, and more. Use small flathead screwdriver to loosen set screw. Infinity analyze software calibration this guide will provide users with a stepbystep method to calibrate infinty analyze software. Home tape measure calibration procedure caliper micrometer inspection log free download. The zero point is repeatedly checked but not reported. This paper describes the method for calibration of large sized micrometers performed at the government of the hong kong special administrative region standards and calibration.
Oppermann is out of print and the majority of content has been updated and published in the publications noted below. This paper describes the method for calibration of large. A set of operations which establishes, under speci. Using the iso guide to the expression of uncertainty in. Micrometer calibration resolution, accuracy and range. If the micrometer zero position constant is updated the wavelength calibration step number may also need updating in order to ensure the quality of the ozone scans. When calibrating a particular instrument, it is necessary to record even the minutest detail of the procedure as well as the result. Inside micrometer calibration procedure memorial university technical services document no ts0052 revision. Nbs handbook 145, 1986, handbook for the quality assurance of metrological measurements, by john k.
This video explains how a stage micrometer can be used to calibrate an ocular micrometer. This circle has a diameter d which can be crudely measured using a metric ruler mounted on a glass slide. Sline 3point internal micrometer thank you for purchasing the sline 3point internal micrometer. A somewhat easier method for checking parallelism requires the use of a gage ball. Calibration may proceed only when the gage is in good working order. Do this in 5 different places on the surface of the anvils. Procedure 1we place the ocular micrometer in the right ocular lens of the lm. Always check the accuracy of a mic with a gauge block if it has been.
In accordance with established procedure, the munitions board standards agency has designated the ordnance corps, the bureau of ordnance, and the air force, respectively, as. Micrometers are essential instruments for measuring external sizes of physical objects. Master gauge block set calibrated outside micrometer of similar range note. Micrometers are used to measure thickness, diameters, and depth of slots with small distances. This procedure describes the calibration of outside micrometer. Digital outside micrometers only need one scale to be verified.
Calibration frequency for micrometers free pdf ebooks. For micrometer head tis, mount the ti shank vertically in the v block and set zero against the surface plate as shown in figure 1. Now close the micrometer spindle onto the parallel. Calpro calibration procedures gagetrak calibration management. You will find a wide selection of checkers and screw thread micrometer. Calpro sample procedure cp02e outside micrometer and micrometer head sample procedure 1 cp02e outside micrometer and micrometer head sample procedure revision date. Micrometer calibration micrometer calibration services j. Micrometer calibration service acs calibration lab. King offers iso 17025 accredited micrometer calibration services in all of our calibration laboratories.
We use oem, military standard procedures, internally developed procedures, or we can custom design a custom micrometer calibration procedure. When close measurements are necessary, the micrometer. It will go through the mathematical calculations needed to calculate the number of micrometers. This sample calibration procedure defines the calibration program requirements for all measurement and test equipment mte. Example uncertainty budget for the calibration of a 0 25 mm micrometer.
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