Items starting with L Files

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Large solar collector arrays: In-situ efficiency test (NT VVS 097)

NT VVS 097

  • The purpose of the test method proposed in this report is to be able to check the efficiency of solar collector arrays, based on in-situ measurements with only a few measuring channels and relatively short measuring time.

File size: 104.10 KB Download

Laboratory fume hoods: Performance (NT VVS 095)

NT VVS 095

  • A method is described for testing laboratory fume hoods (see 4, Definitions) by measuring pressure drop, noise level, face velocity and the escape concentration of tracer gas.

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Large heat meters: In situ calibration (NT VVS 087)

NT VVS 087

  • This NORDTEST method is designed for on-site calibration of heat meters (in situ calibration). In this way, there will be no influence from the installation.

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Liquid flow metering installations: Radioactive tracer transit time method, in situ calibration (NT VVS 082)

NT VVS 082

  • This document specifies the method for in situ calibration of liquid flow metering installations using the radioactive tracer transit time method. The method specified is an application of the flow measurement method described in ISO 2975/Vll for the calibration of permanent flow meter installations.

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Large heat pumps: Field testing and presentation of performance (NT VVS 076)

NT VVS 076

  • This Nordtest method is intended to be used in the presentation and testing of performance primarily for large heat pumps.

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Linear calibration of axial load fatigue testing machines (NT TR 579)

NT TR 579

  • A method of linear calibration of axial load fatigue testing machines is proposed. It is built on the understanding obtained from a vibration analysis of the force transfer function from the load cell of the machine to a fabricated calibration bar. The results have been successfully verified on a commercial testing machine installed at SP in Borås.

File size: 604.54 KB Download

Leaching of organic contaminants from construction debris - Development of a diffusion test procedure (NT TR 577)

NT TR 577

  • A test procedure has been designed to determine diffusion of organic contaminants from monolithic materials. The method is based on the use of a scavenger with a high sorption capacity which allows a near zero aqueous concentration and there by achieves a maximum diffusion gradient from the test object.

File size: 961.79 KB Download

Leaching tests for non-volatile organic compounds - development and testing (NT TR 576)

NT TR 576

  • The main objective of this project was to develop a leaching test method suitable for organic non-volatile compounds. The project was performed in two parts.

File size: 1.69 MB Download

Laborinterne Qualitäts Kontrolle (Trollboken - Troll book) (NT TR 569 - German - Edition 4)

NT TR 569 Edition 4 - German

  • According to ISO/IEC 17025 (3): The laboratory shall have quality control procedures for monitoring the validity of tests undertaken. The resulting data shall be recorded in such a way that trends are detectable and, where practicable, statistical techniques shall be applied to the reviewing of the results.

File size: 701.90 KB Download

Laboratory measurement of sound insulation in the frequency range 50 Hz to 160 Hz – A Nordic intercomparison (NT TR 489 - edition 1)

NT TR 489 - Edition 1

  • Five Nordic laboratories have carried through an intercomparison concerning laboratory measurements of sound insulation at low frequencies. Measurements have been carried out on two different test objects – a sandwich steel plate and a window - in the frequency range 50 Hz to 160 Hz according to ISO/DIS 15186-3, which describes a new test method based on intensity technique.

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Laboratory measurement of sound insulation in the frequency range 50 Hz to 160 Hz – A Nordic intercomparison (NT TR 489)

NT TR 489

  • Five Nordic laboratories have carried through an intercomparison concerning laboratory measurements of sound insulation at low frequencies. Measurements have been carried out on two different test objects – a sandwich steel plate and a window - in the frequency range 50 Hz to 160 Hz according to ISO/DIS 15186-3, which describes a new test method based on intensity technique.

File size: 31.68 KB Download

Life rafts, inflatable: Appliances for release and launching (NT MECH 032)

NT MECH 032

  • The method tests the function of release and launching appliances for inflatable life rafts in accordance with “Rules for the amendment of rules no. 325/1985 for life saving and safety appliances, with amendments no. 171/1987”.

File size: 216.76 KB Download

Large, free-hanging curtain and drapery textiles: Heat release, fire spread and smoke production - Full scale test (NT FIRE 043)

NT FIRE 043

  • This method simulates a fire that under well ventilated conditions starts in a large free-hanging curtain fabric in front of a wall.

File size: 236.25 KB Download

Load moment limiter for mobile cranes: Evaluation (NT ELEC 007)

NT ELEC 007

  • The purpose of this NORDTEST method is to form a common basis for the testing and evaluation of a load moment limiter (LML) for use in mobile cranes.

File size: 2.20 MB Download

Leaching of active ingredients from preservative-treated timber – Semi-field testing (NT BUILD 509)

NT BUILD 509

  • This Nordtest standard specifies a method to determine the relative leaching rate of preservative treated wood for use class 3 (outdoor above ground) by a semi-field method. The preservative treated wood can be tested with or without subsequent surface coating or other water-repellent treatment. The method is applicable to the testing of commercial or experimental preservatives applied to non-durable timber by methods appropriate to commercial practice.

File size: 180.61 KB Download

Lightweight aggregates for railway embankments - Resistance to cyclic compressive loading (NT BUILD 503)

NT BUILD 503

  • The method specifies the procedures for the determination of the compressive deformation of lightweight aggregates during a fatigue test carried out with cyclic compressive load. The method is primarily designed for aggregates to be used in railway embankments and is applicable for lightweight aggregates and recycled aggregates with maximum particle size 32 mm.

File size: 65.77 KB Download

Liquid applied waterproofing systems: Accelerated ageing in alkaline environment (NT BUILD 502)

NT BUILD 502

  • This Nordtest method is intended for assessment of the durability of liquid applied waterproofing systems in alkaline environment, e.g. moist concrete.

File size: 123.93 KB Download

Lightweight aggregates: Compressibility and compressive strength after compaction by vibration (NT BUILD 498)

NT BUILD 498

  • The method specifies the procedure for the determination of the compressibility of light weight aggregates. The test is applicable for light weight aggregates and recycled aggregates of up to 32 mm maximum size.

File size: 158.70 KB Download

Lightweight aggregates: Resistance to cyclic compressive loading (NT BUILD 497)

NT BUILD 497

  • The method specifies the procedures for the determination of the compressive deformation of lightweight aggregates during a fatigue test carried out with cyclic compressive load. The method is primarily designed for aggregates to be used in railway embankments and is applicable for lightweight aggregates and recycled aggregates of 32 mm maximum particle size.

File size: 136.34 KB Download

Light-weight beams of wood: Loadbearing capacity and rigidity (NT BUILD 327)

NT BUILD 327

  • Light-weight beams of wood are used in buildings in joists, purlins and trusses, etc. They are primarily subjected to static bending, shear forces and concentrated loads at the supports.

File size: 56.71 KB Download

Luminaires with tubular fluorescent lamps: Sound power level (NT ACOU 092)

NT ACOU 092

  • This Nordtest method specifies procedures for laboratory measurements of airborne noise emitted by luminaires with tubular fluorescent lamps.

Nordtest

Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.