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ASTM E77 - 07 Standard Test Method for Inspection and Verification of Thermometers
Jan 04, · Astm C – 97 pdf free download January 4, ASTM-C Comments: 0. Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus1. This preferred is issued beneath the constant designation c ; the number immediately following the designation shows the astm e77 pdf February 23, admin Finance Leave a Comment on ASTM E77 PDF E77 – 98 Standard Test Method for Inspection and Verification of Thermometers, Calibration-temperature instrumentation, Liquid-in-glass thermometers. must be performed using either a dry block or a stirred liquid bath in accordance with ASTM E77 or E Calibrations performed by electrical means, such as comparing the thermometer readout to resistors, or use of an electronic calibrator that simulates temperature output through electrical resistance, will not be .
Astm e77 pdf free download
Test Method. Temperatures are not measured directly with this instrument. It is the responsibility of the user of this standard to establish ast, safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
In the case of diameter measurements, the bulb or other portions of the thermometer being tested should not enter the smaller of the holes in the ring gage see 5. Already Subscribed to this document. Successive readings taken a. In some instances total-immersion thermometers may be used under conditions of complete immersion. Discard any cloudy or unsound portions. Inspection for uniformity of spacing can generally be accomplished by eye, qstm for greater accuracy a pair of dividers may be used to advantage.
Originally published as E 77 — 49 T. You can download and open this file to your own computer but Astm e77 pdf free download prevents opening this file on another computer, including a networked server.
Astm e77 pdf free download bulb should be allowed to warm up slowly. Heat the thermometer again to the selected reference point e the main scale, keep it at this temperature for h. Allow the thermometer to cool as described in and then repeat the procedures described in and. A number in parentheses indicates the year of last reapproval. Strains in the glass as observed with a polarized light strain gage near enlargements in the stem or bore, or at the top of the thermometer, are detrimental.
Discontinuities in the spacing are asrm of faulty graduating. Return the thermometer to the bath, astm e77 pdf free download, preheated to the temperature of test, and heat for 24 h. Such thermometers should always be inspected for these separations, which can be repaired by the procedures described above. Asgm pricing is determined by: This standard is also available to be included in Standards Subscriptions.
Select clear pieces of ice or ice made from distilled or pure water. If the document atm revised or amended, you will be notified by email, astm e77 pdf free download. In order that it shall be satisfactory for such use, the thermometer should meet the requirement that the ratio of resistances at the steam and ice points shall be greater than 1. It is only necessary to have a liquid-in-glass thermometer completely calibrated one time.
This keeps the viscosity of the liquid in the capillary low and aids in hastening drainage. Current edition approved Nov. Adjust the dividers to extend over 10 or 20 graduations, and successive intervals can be intercompared rapidly. Allow the thermometer to cool, at the same rate as at the start of the test, to the temperature referred to above, and redetermine the reference reading under the same conditions as before.
Scale corrections should always be applied in the use of these standards. In all cases only the current version of the standard as published by ASTM is to be considered the official document. Thermometers that have a contraction chamber below the lowest graduation are likely to develop separations either in the chamber or above it. Heat the thermometer to the selected reference point on the astm e77 pdf free download scale, maintain the temperature for at least 15 min, and determine the scale correction at this point.
Need more than one copy? Please first log in with a verified email before subscribing to alerts. If a mercury separation is observed in the stem, several different ways are suggested for joining the columns, depending on the construction of the thermometer and the type of separation.
For more stubborn separations it may be necessary to cool the bulb in dry ice to a point low enough to bring all of the liquid into the bulb itself, astm e77 pdf free download. Burning out, loosening, chalking, or fading of the pigment shall be cause for rejection. A slight tapping of the 4 E 77 — 98 thermometer against the palm of the hand will facilitate this joining. Last previous edition approved in as E 77 — It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to astm e77 pdf free download. If bubbles are observed in the bulb, astm e77 pdf free download, they can generally be removed by cooling the bulb with dry ice or other convenient coolant until all the liquid is drawn astm e77 pdf free download the bulb.
In reading thermometers, account must be taken of the fact that the lines are of appreciable width. This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website.
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Jun 23, · Leave a Comment on ASTM E77 PDF E77 – 98 Standard Test Method for Inspection and Verification of Thermometers, Calibration-temperature instrumentation, Liquid-in-glass thermometers. Inspection and Verification of Thermometers, is based on ASTM E77 − 14, Standard. UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS. SIGN UP TO SEE MORE ASTM E January 27, STANDARD METHOD FOR VERIFICATION AND CALIBRATION OF LIQUID- IN-GLASS THERMOMETERS A description is not available for this item. View Less. View All. References. Jan 04, · Astm C – 97 pdf free download January 4, ASTM-C Comments: 0. Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus1. This preferred is issued beneath the constant designation c ; the number immediately following the designation shows the
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