STN EN ISO 6145-7
| Name: | STN EN ISO 6145-7 |
| Validity: | Valid |
| Number of pages: | 24 |
| Language: |
EN
|
| Paper: | 14,10€ |
| Electronic version |
a) Only read (without ability to print and copy)
12,69€ b) Without ability to print, with ability to copy (printscreen) 14,10€ c) With ability to print and copy (printscreen) 18,33€ |
| Slovak title | Analýza plynov. Príprava kalibračných plynných zmesí dynamickými metódami. Časť 7: Tepelné regulátory hmotnostného toku (ISO 6145-7: 2018) |
| English title | Gas analysis - Preparation of calibration gas mixtures using dynamic methods - Part 7: Thermal mass-flow controllers (ISO 6145-7:2018) |
| Release Date: | 01. 06. 2019 |
| Date of withdrawal: | |
| ICS: | 71.040.40 |
| Sorting character/National clasification code | 38 5615 |
| Level of incorporation: | idt EN ISO 6145-7:2018, idt ISO 6145-7:2018 |
| Official Journal | 05/19 |
| Amendments | |
| Replaced by: | |
| Repleces: | STN EN ISO 6145-7:2011-04 (38 5615) |
| Note in Official Journal: | |
| Subject of the standard: | ISO 6145 is a series of documents dealing with various dynamic methods used for the preparation of calibration gas mixtures. This document specifies a method for continuous preparation of calibration gas mixtures, from nominally pure gases or gas mixtures by use of thermal mass-flow controllers. The method is applicable to preparation of mixtures of non-reacting species, i.e. those which do not react with any material of construction of the flow path in the thermal mass-flow controller or the ancillary equipment. If this method is employed for preparation of calibration gas mixtures the optimum performance is as follows: the relative expanded measurement uncertainty U, obtained by multiplying the standard uncertainty by a coverage factor k = 2, is not greater than 2 %. |
| Preview: | Náhľad normy (PDF) |