Porcelain laboratory apparatus — Requirements and methods of test
The requirements specify the quality of the material. The different methods of test are specified. They concern the porosity and imperfections of glaze, the resistance to heat and sudden change in temperature, the resistance of glaze to high temperature, to acid and to alkali and the constancy of mass on ignition.
A system of color coding is specified for one-mark pipettes for identification of nominal capacities, and for graduated pipettes for identification of nominal capacities and unit of subdivision. The color code bands for the different capacities are tabled and the method of marking is specified. Suitable requirements and test methods for the durability of the colours are intended to be considered…
The requirements deal with the geometric charateristics to ensure interchangeability. The dimensions of the joint-ground zone and the outer diameter of the tube connected to the joint are given in a table and illustrated in a drawing. In addition the surface finish is specified. A system of gauges (stell balls) for testing the ball cup is tabled. In the annex a method of testing the leakage…
Statistical interpretation of data — Comparison of two means in the case of paired observations
A method is specified for comparing the mean of a population of differences with zero or any other preassigned value. It may be applied to establish a difference between two treatments, where "treatment" should be understood in a wide sense, e.g. as a test method, measuring instrument or laboratory involved, and is applicable under the conditions that the series of differences can be…
Anhydrous hydrogen fluoride for industrial use — Sampling
This part contains a method for taking laboratory samples intended for the determination of the water content and the preparations of the test samples. Contains instructions for handling with the material. Applicable for taking samples of this highly corrosive liquid from road and rail tanks, drums and cylinders. The principle consists in allowing the liquid of one of these containers to flow in…
Solid dielectric tubular-style rotary variable pre-set capacitors: Grade 2. Part 1: General requirem...
Establishes under laboratory conditions: their suitability for use
over stated ranges of temperature, air pressure and humidity, their
ability to withstand specified conditions of mechanical shock,
their ability to withstand the rigours of normal assembly
processes.
Ceramic dielectric disk-style rotary variable pre-set capacitors: Grade 2. Part 1: General requireme...
Describes the tests on capacitors to establish as far as possible under laboratory conditions: their suitability for use over stated ranges of temperature, air pressure and humidity; their ability to withstand specified conditions of mechanical shock such as are to be expected under transit or operational conditions: their
ability to withstand the rigours of normal assembly processes attendant on…
