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 Test Method for Exposure of a Membrane Switch or Printed Electronic Device to Temperature and Relative Humidity (Withdrawn 2024)
Automaticky přeložený název:
Standardní zkušební metoda pro expozici přepínačem membrány nebo Vytištěno elektronickým zařízením na teplotě a relativní vlhkosti
NORMA vydána dne 1.6.2015
Označení normy: ASTM F1596-15
Poznámka: NEPLATNÁ
Datum vydání normy: 1.6.2015
Kód zboží: NS-611652
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
membrane switch, printed electronic device, relative humidity (RH), temperature,, ICS Number Code 31.220.20 (Switches)
Significance and Use | ||||||||||||||
4.1 Changes in temperature and humidity during shipping, storage or use can affect the visual appearance, mechanical integrity, or electrical functionality of switches. This practice simulates three different environments to which membrane switches may be exposed. 4.2 The three industry-recognized switch categories based on performance levels are Level 1, Level 2, and Level 3 (see section 9.1). 4.3 Additionally, there may be custom requirements that vary by application, therefore, these requirements can be determined by customer and vendor agreement and be established as a Level 4. 4.4 This practice defines the duration of a single cycle. Multiple cycles may be appropriate depending on the requirements of the application. |
||||||||||||||
1. Scope | ||||||||||||||
1.1 This test method covers a procedure for temperature and humidity cycling of a membrane switch or printed electronic device. 1.2 This test method is performed to evaluate the properties of materials used in the construction of membrane switch or printed electronic assemblies as they are influenced by the absorption and diffusion of moisture and moisture vapor. This is an accelerated environmental test, accomplished by the continuous exposure of the test specimen to high relative humidity at an elevated temperature. Absorption of moisture by many materials results in swelling, which destroys their functional utility, causes loss of physical strength, and changes in other mechanical properties. Insulating materials which absorb moisture may suffer degradation of their electrical properties. 1.2.1 Physical changes: 1.2.1.1 Differential contraction or expansion rates or induced strain of dissimilar materials. 1.2.1.2 Cracking of surface coatings. 1.2.1.3 Leaking of sealed compartments. 1.2.1.4 Deformation or fracture of components. 1.2.2 Chemical changes: 1.2.2.1 Separation of constituents. 1.2.2.2 Failure of chemical agent protection. 1.2.3 Electrical changes: 1.2.3.1 Changes in electronic and electrical components. 1.2.3.2 Electronic or mechanical failures due to rapid water of condensate formation. 1.2.3.3 Excessive static electricity. 1.3 This test method is not intended to be a thermal shock procedure; a ramp rate between temperature extremes should not exceed 2°C/min. 1.4 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 | ||||||||||||||
|
Chcete mít jistotu o platnosti užívaných předpisů?
Nabízíme Vám řešení, abyste mohli používat stále platné (aktuální) legislativní předpisy.
Chcete vědět více informací? Podívejte se na tuto stránku.
Poslední aktualizace: 22.12.2024 (Počet položek: 2 217 000)
© Copyright 2024 NORMSERVIS s.r.o.