Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
Přeložit název
NORMA vydána dne 1.3.2020
Označení normy: ASTM E104-20
Poznámka: NEPLATNÁ
Datum vydání normy: 1.3.2020
Kód zboží: NS-990644
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
aqueous solution, constant relative humidity, control of relative humidity, equilibrium relative humidity, humidity, relative humidity, saturated salt solutions,, ICS Number Code 19.040 (Environmental testing)
Significance and Use | ||||||
5.1 Standard value relative humidity environments are important for conditioning materials in shelf-life studies or in the testing of mechanical properties such as dimensional stability and strength. Relative humidity is also an important operating variable for the calibration of many species of measuring instruments. |
||||||
1. Scope | ||||||
1.1 This practice describes one method for generating constant relative humidity (rh) environments in relatively small containers. 1.2 This practice is applicable for obtaining constant relative humidities ranging from dryness to near saturation at temperatures spanning from 0 to 50°C. 1.3 This practice is applicable for closed systems such as environmental conditioning containers and for the calibration of hygrometers. 1.4 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability. (See Section 9.) 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 Warning—Saturated salt solutions are extremely corrosive, and care should be taken in their preparation and handling. There is also the possibility of corrosive vapors in the atmospheres over the saturated salt solutions.1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This 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 | ||||||
|
Chcete mít jistotu, že používáte pouze platné technické normy?
Nabízíme Vám řešení, které Vám zajistí měsíční přehled o aktuálnosti norem, které používáte.
Chcete vědět více informací? Podívejte se na tuto stránku.
Poslední aktualizace: 08.09.2024 (Počet položek: 2 346 217)
© Copyright 2024 NORMSERVIS s.r.o.