The finding concerned the calibration or lack thereof of tape measures used on our production floor. Agronomy facts 75 calibration of grainseed drills grainseed drills are important tools for establishment of grain and forage crops as well as cover crops. Check the push and pull measurements of your tape measure against the lines lasered or milled into your lixer tape measure calibration or inspection tool. However, damage from dropping the tape measure or long use will make measurements inaccurate. For a long time the terms calibration and verification and verification have often been used as synonyms. Calibrations are usually made at each 1 foot interval for the first 10 feet, and at each 10 foot interval to the full length of the tape. Jul 16, 2017 inside a 60meterlong underground tunnel, measurement scientists check the accuracy of tape measures. In spite of extremely small measurement bench with the length of only three metres, by the use of. This page contains the procedures and forms used by technical services in the monitoring and measuring devices process. These tapes are used to confirm lengths after a cutting operation.
This should be a trusted ruler with fine, engraved lines for markings. Calibration basics and best practices individuals who view calibration as a necessary evil are not taking into account the bigger picture. Instruments calibration procedures calibration of instruments. Pressofilm ht instructions testex pressofilm replica tape. The simplest calibration procedure for an analog, linear instrument is the socalled zeroandspan method. Quality control can be costly and timelyespecially ensuring employees have calibrated tape measures, squares and levels. Examine the entire length of the tape measure for any external damages or other obvious signs of abuse or wear that may affect the accuracy or function. Inside a 60meterlong underground tunnel, measurement scientists check the accuracy of tape measures. In the paper the precise calibration procedure is presented.
Its reproduction is prohibited unless authorized by company name page 1 of 5. Narrowing the range of accuracy will help to improve the quality of your. Purpose metal tapes are used by contractors, surveyors, and others for building layouts, measurement of land areas, establishment of land boundaries, and similar purposes. Nbs handbook 145, 1986, handbook for the quality assurance of metrological measurements, by john k. Control of measuring equipment the requirements of iso 9001. Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and covered mass, length and volume calibrations for field standards used in the commercial marketplace. One claim can also lead to much higher expenses than meeting a simple calibration standard. Doing a calibration takes a lot less time and effort than investigating why parts dont fit, or going out to the jobsite to handle a claim. The graphic on each piece of tape will help you remember this new averaging procedure.
Calibration of line standards of length and measuring tapes. However, to satisfy iso 9001s requirements for control, measuring equipment used for product and process verification requires attention throughout its lifespan. The ulm was equipped with existent laser interferometer, video probing system vps and fixtures for tapes and weights. Tape measure calibration tape measures and rulers are often used as a quick visual reference in the quality control process. The accuracy of the measurement often must be provable to 0. Oppermann is out of print and the majority of content has been updated and published in the publications noted below. The good laboratory practices glps, good measurement practices gmps, and standard operating procedures sops that have not been updated are available on the linked pages as scanned pdf copies. In this instructable, you will learn how to calibrate a steel, retractable tape measure. The starbars are calibrated in amperes rather than ohms, for it is a more convenient unit to use. If user circumstances warrant, the new ht tape can continue to be used with the old nonaveraging instructions. Calibration of line standards of length and measuring tapes at the. It is the purpose of this section to describe procedures for efficiently calibrating different types of instruments. Calibrating your tape measure regularly will keep your. Dec 12, 2012 steps of calibrating a steel tape measure correctly posted on december 12, 2012 by chinatapmeasure the accuracy of tools is very important since skilled craftsmen rely on the accuracy and dependability of their tools.
Measuring tape calibration free download as pdf file. Trying to keep up with validating the calibration of all your employees tape measures, squares and levels can be quite the challenge. Luckily, with the proper approach, using a tape measure. Sop 6 calibration of vernier calliper gauges issue no. Adjustment is the process of measuring and compensating for device performance to improve the input accuracy. Clean the measuring tape s measuring surfaces, the granite surface, and the gauge blocks to be used. The length of the tape undergoing calibration is computed from the known length of the standard tape and the observed differences between the test tape and the standard. Since there is only one calibration point, a contour projector could have been used as optional calibration. We recently received a minor nonconformance during a surveillance audit.
Some companies do counter the expense of external calibration by doing it themselves. Maintaining a calibration program can be achieved by using simple spreadsheets. This may be a new tape measure you want to check for accuracy or an old, well used tape measure you suspect is not accurate. Ts0069 measuring tape calibration record sheet must be used.
But whether your company is iso or not, quality audits from customers always include. Steps of calibrating a steel tape measure correctly china. As an equipment standard, many quality technicians automatically rely on these tools to be accurate once initially calibrated. Calibration is essential to improving a companys bottom line, by minimizing risk to product defects and recalls, and enhancing a reputation for consistent quality. Calibrate tape measures, squares and levels calibration station. Calibration of measuring tapes online templatestore. Measuring tape calibration procedure memorial university. The procedure and accompanying forms are listed below. Calibration doesnt have to be difficult, but if you let it get out of hand, you can end up in a tough spot. The scribed line helps the part inspector because the inspector no longer has to read the scale. The seed delivery system in drills is not as precise as that used in planters because they use flutes or sponges to meter seed instead of seed singulation. Layout tape without twists, proper grip and stance, use of plumb bob, proper care of tape, field notekeeping and calibration of pace. In any iso 9001 registered quality management system, the assurance of quality is rooted in the results of inspection and measuring activities by the quality department.
The last section of the procedure covers rules that have had a line specially scribed at a particular inspection point on a part. Hb 145 was developed as a source of calibration procedures for weights and measures laboratories and. For a small calibration laboratory purchase of a special tape calibration bench was not economically viable, so we adapted our length measuring device zeiss ulm 3000. When it comes to construction and craftsmanship, taking accurate measurements can be the difference between a great finished product and a subpar one. Edm or total station one for three groups learn proper taping procedures as demonstrated by instructor. Clean the measuring tapes measuring surfaces, the granite surface, and the gauge blocks to be used. Rolls of old formulation nonht pressofilm can be safely used with these new instructions. Jul 17, 2017 the tool to use to calibrate tape measures is appropriately called a tape measure calibrator, and they are available online or through specific brickandmortar retailers. Calibration procedure check the push and pull measurements of your tape measure they should remain the same with a tape measure calibrator. The original table of contents and several legacy sections are provided here as reference only. Judson the methods used at the national bureau of standards in calibrating line standards of length and measuring tapes submitted for standardization are outlined. Tools are available to help you accurately and easily calibrate your tape measures. An arbitrary pulse shaping of the amplitude modulating signal is a standard procedure used to assess the.
Our heating elements are calibrated in open air by applying a voltage through them that will cause them to dissipate approximately 15. The retractable steel tape measure you want to calibrate. Measuring tape calibration calibration measurement scribd. Calibrationverification procedures and forms research. Inspect the body of the tape measure, the tape itself, and the tabbed metal clip on the end of the tape for. Instructions for calibrating tape measures using the lixer. Recommended standard operating procedure for calibration of metal tapes1 tape to tape method i. Standards and equipment used must have a valid calibration certificate. Measurement of deviations on the cmm first measurement deviation is checked by gauge block 40 mm using actual measurement force, five points are probed on the fix measuring surface and x axes is defined through these points fig. I am looking for a logical, simple method for calibrating tape measures. Standard measuring tape calibration procedure 1 ph.
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