Electromagnetic Interference Measuring Instrument - ANSI Type
1. Scope
1.1 This Standard sets forth the characteristics of an instrument conforming to the requirements of ANSI Standards C63.2, Ra dio-Noise and Field-Strength Meters 0.015 to 30 Megacycles/Second, and C63.3, Radio-Noise and Field-Strength Meters 20 to 1,000 Megacycles/Second, for the measurement of electromagnetic interference, both conducted and radiated, in the frequency range 0.15…
Aircraft — Joints for connecting crew members' regulator masks to oxygen sources
Gives joint lock dimensions for connecting these masks to sources in aircraft and helicopters. Joint dimensions standardization provides interchangeability with masks of various types. The basic dimensions and tolerances are shown in figures 1 and 2. Dimensions without tolerances can correspond to national standards. The lock halves shall be installed as shown in figures 1 and 2.
The oil shall be a clear mobile liquid which may become cloudy or crystalline at low temperatures. The colour shall be yellow to brownish-yellow, the odour characteristic, recalling safrole. The relative density at 20/20 °C has to ly between 1,082 and 1,094 and the refractive index at 20 °C between 1,5330 and 1,5370. The optical rotation shall range from - 0,50 to + 3,0 . The miscibility with 90…
Textile fabrics — Determination of resistance to water penetration — Hydrostatic pressure test
A specimen is subjected to a steadily increasing pressure of water on one face, under standard conditions, until penetration occurs in three places. The water pressure may be applied from below or from above the test specimen. The hydrostatic head supported by a fabric is a measure of the resistance to the passage of water through the fabric.
Butan-1-ol for industrial use — Methods of test — Part 1: General
Gives general instructions ans also specifies the methods to be used for the determination of density at 20 C, the determination of aldehydes and ketones content, the determination of destillation yield, the determination of dry residue after evaporation on the water bath, the determination of bromine number, the measurement of colour and the determination of water content. International…
Butan-1-ol for industrial use — Methods of test — Part 2: Determination of acidity — Titrimetric met...
The principle consists in titration of the acidity of a test portion with a standard volumetric sodium hydroxide solution, using phenolphthalein as indicator. This document should be read in conjunction with ISO 755/1. International Standards ISO 755/1, ISO755/2 and ISO 755/3 cancel and replace ISO Recommendation R 755-1968, og which they constitute a technical revision. It as also been approved…
Butan-1-ol for industrial use — Methods of test — Part 3: Sulphuric acid colour test
The principle consists in treatment of a test portion with sufphuric acid solution under specified conditions, comparison of the colour developed with that of the same volume of an agreed colour standard. By agreement between the interested parties, the colour developed may be measured in Hazen units (platinum-cobalt scale).
The Standard specifies the following characteristics of the oil. Appearance: Liquid. Colour: Almost colourless to yellow. Odour: Characteristic, spicy, camphorous. Relative density at 20/20 °C: 0,191 - 0,936. Refractive index at 20 °C: 1,4620 - 1,4680. Optical rotation at 20 °C: Range from + 22 to + 41 . Miscibility with 70 % (V/V) ethanol at 20 °C: 1 : 2 to 5. Acid value: Maximum 6. Ester value…
Fruits, vegetables and derived products — Determination of total sulphur dioxide content
The method consists in acidifying and heating a test portion, entraining, in a current of nitrogen, the gas liberated, absorbing and oxidizing the gas by bubbling it through a neutral, dilute hydrogen peroxide solution, then determining the sulphuric acid thus formed using standard volumetric sodium hydroxide solution. Verification of the determination is described in the annexes A and B,…
Polyglycols for industrial use — Determination of hydroxyl number — Phthalic anhydride esterificatio...
The hydroxy groups present in a test portion are esterified with phthalic anhydride. The excess phthalic anhydrids is hydrolyzed and the phthalic acid formed is neutralized with standard volumetric sodium hydroxide solution. If the sample contains free acidity or alkalinity a corresponding correction is made. From the corrected hydroxyl number, the apparat relative molecular mass may be…