Items tagged with INTERCOMPARISON Files

File size: 1.92 MB Download

Uncertainty calculations for calibration of water and heat flow meters (NT VVS 131)

NT VVS 131

  • The aim of this method is to provide a basis for uncertainty calculations for testing/calibrating/verifying the flow measurement part of water and heat meters. The method is designed for being used as a guideline in combination with existing standards for flow measurement and uncertainty calculations.

File size: 4.49 MB Download

Intercomparison and method for uncertainty calculation of water and heat flow (NT TR 610)

NT TR 610

  • A relatively high utilisation of district heating and limited resources of drinking water makes metering of water and heat of great importance in both the Nordic and the Baltic countries. This has further resulted in a heavy focus on testing and calibration of the meters as well as on the uncertainty of the meter installation.

File size: 9.89 MB Download

Intercomparison of sandboxes used for testing joints for district heating pipes (NT TR 495)

NT TR 495

  • An intercomparison has been carried out between 3 laboratories concerning a type test for joints according to EN489 District heating pipes – Pre-insulated bonded pipe systems for directly buried hot water networks - Joint assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene.

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.

File size: 710.23 KB Download

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.

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”.