ASTM E1235 - 12 Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft

ASTM E1235 - 12

Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft

Active Standard ASTM E1235 | Developed by Subcommittee: E21.05

Book of Standards Volume: 15.03

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Significance and Use

5.1 The NVR determined by this test method is that amount that can reasonably be expected to exist on hardware exposed in environmentally controlled areas.

5.2 The evaporation of the solvent at or near room temperature is to quantify the NVR that exists at room temperature.

5.3 Numerous other methods are being used to determine NVR. This test method is not intended to replace methods used for other applications.

1. Scope

1.1 This test method covers the determination of nonvolatile residue (NVR) fallout in environmentally controlled areas used for the assembly, testing, and processing of spacecraft.

1.2 The NVR of interest is that which is deposited on sampling plate surfaces at room temperature: it is left to the user to infer the relationship between the NVR found on the sampling plate surface and that found on any other surfaces.

1.3 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.

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D1193 Specification for Reagent Water

E1234 Practice for Handling, Transporting, and Installing Nonvolatile Residue (NVR) Sample Plates Used in Environmentally Controlled Areas for Spacecraft

F50 Practice for Continuous Sizing and Counting of Airborne Particles in Dust-Controlled Areas and Clean Rooms Using Instruments Capable of Detecting Single Sub-Micrometre and Larger Particles

ISO Standards

14951-3 Space Systems--Fluid Characteristics--Part 3: Nitrogen

U.S. Federal Standard

FED-STD-209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones

Institute of Environmental Sciences and Technology

IEST-STD-CC1246 Product Cleanliness Levels and Contamination Control Program

American National Standards Institute

ANSI/ASME B46.1-2009 Surface Texture (Surface Roughness, Waviness, and Lay)

ICS Code

ICS Number Code 49.025.01 (Materials for aerospace construction in general); 49.140 (Space systems and operations)

UNSPSC Code

UNSPSC Code 25150000(Spacecraft)

Referencing This Standard

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DOI: 10.1520/E1235-12

Citation Format

ASTM E1235-12, Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft, ASTM International, West Conshohocken, PA, 2012, www.astm.org