We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
Standard Practice for Calibrating Gaseous Reference Leaks
STANDARD published on 15.11.2012
Designation standards: ASTM E908-98(2012)
Note: WITHDRAWN
Publication date standards: 15.11.2012
SKU: NS-48444
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
ICS Number Code 17.060 (Measurement of volume, mass, density, viscosity)
1. Scope | ||||||||||
1.1 This practice covers procedures for calibrating leak artifacts of a specified gas, that may be used for determining the response of leak detectors, or in other situations where a known small flow of gas is required. The purpose of this practice is to establish calibration without reference to other calibrated leaks in as straightforward a manner as possible using the likeliest available equipment. While the uncertainties associated with these procedures will most likely be greater than those obtained via traceable calibration chains (on the order of 10 %), these procedures allow independent means of establishing or verifying the leakage rate from leak artifacts of questionable history, or when traceable leak artifacts are not available. 1.2 Two types of leaks are considered: 1.2.1 Type I—Pressure to vacuum. 1.2.2 Type II—Pressure to atmosphere. 1.3 Three calibration methods are described under each type of reference leak: 1.3.1 Method A—Accumulation comparison, using a known volume of gas at specified conditions of temperature and pressure as a reference. 1.3.2 Method B—Accumulation comparison, using a leak artifact calibrated using Method A. 1.3.3 Method C—Displacement of a liquid slug, by the leak, in capillary tube of known dimensions. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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 use. |
||||||||||
2. Referenced Documents | ||||||||||
|
Historical
1.6.2014
Historical
1.5.2013
Historical
1.7.2014
Historical
1.10.2009
Historical
1.5.2014
Historical
1.11.2012
Do you want to make sure you use only the valid technical standards?
We can offer you a solution which will provide you a monthly overview concerning the updating of standards which you use.
Would you like to know more? Look at this page.
Latest update: 2024-12-22 (Number of items: 2 217 000)
© Copyright 2024 NORMSERVIS s.r.o.