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 Guide for Prediction of Analyzer Sample System Lag TimesTranslate name
STANDARD published on 1.12.2021
Designation standards: ASTM D7278-21
Publication date standards: 1.12.2021
The number of pages: 9
Approximate weight : 27 g (0.06 lbs)
Country: American technical standard
Category: Technical standards ASTM
analyzer, lag time, on-line, sample systems, sampling, response,, ICS Number Code 17.220.01 (Electricity. Magnetism. General aspects)
|Significance and Use|
5.1The analyzer sample system lag time estimated by this guide can be used in conjunction with the analyzer output to aid in optimizing control of blender facilities or process units. A known and constant lag time is key for the use in optimizing control.
5.2The lag time can be used in the tuning of control programs to set the proper optimization frequency.
5.3The application of this guide is not for the design of a sample system but to help understand the design and to estimate the performance of existing sample systems. Additional detailed information can be found in the references provided in the section entitled Additional Reading Material.
1.1This guide covers the application of routine calculations to estimate sample system lag time, in seconds, for gas, liquid, and mixed phase systems.
1.2This guide considers the sources of lag time from the process sample tap, tap conditioning, sample transport, pre-analysis conditioning and analysis.
1.3Lag times are estimated based on a prediction of flow characteristics, turbulent, non turbulent, or laminar, and the corresponding purge requirements.
1.4Mixed phase systems prevent reliable representative sampling so system lag times should not be used to predict sample representation of a mixed phase stream.
1.5The values stated in inch-pound units are to be regarded as standard. Other units of measurement are included in this standard and examples where normally seen in industry.
1.6This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
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: 2022-12-02 (Number of items: 2 643 927)
© Copyright 2022 NORMSERVIS s.r.o.