Items tagged with TEST METHOD 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: 83.00 KB Download

Pipe in tube systems (NT VVS 129)

NT VVS 129

  • This Nordtest method specifies test methods for testing complete Pipe in tube systems for fitness in use.

File size: 1.17 MB Download

Ventilations filters: Field test of efficiency (NT VVS 128)

NT VVS 128

  • This Nordtest method is intended to be used in testing ventilation filters in their normal operating conditions. The purpose of the test is to determine if the fractional efficiency of the filter(s) differs significantly from that expected from the laboratory tests.

File size: 554.12 KB Download

Floor heating systems: Design and type testing of waterborne heat systems for lightweight structures (NT VVS 127)

NT VVS 127

  • This standard describes procedures and prerequisites for determining the heat output from floor heating systems in residential buildings, offices and other buildings put to similar uses.

File size: 58.18 KB Download

Anti-scale devices: Efficiency (NT VVS 126)

NT VVS 126

  • The objective of the test method is to test the efficiency of anti-scale devices. The efficiency is determined by measuring the amount of scale on a heating element in a water heater equipped with treated water compared with the amount of scale on a blind installation without water treatment.

File size: 195.66 KB Download

Direct acting electric heating – Testing of control systems Part 3: evaluation using real-time simulation (NT VVS 125)

NT VVS 125

  • The test method is designed for evaluation of electric-heat controllers (see Part 1) by means of real-time simulation.

File size: 77.50 KB Download

Direct acting electric heating – Testing of control systems: Part 2: evaluation of control sensors (NT VVS 124)

NT VVS 124

  • The test method is intended for laboratory testing of sensors for control systems of electrically heated single-family dwellings.

File size: 206.85 KB Download

Direct acting electric heating – testing of control systems: Part 1: terminology and evaluation in a test chamber (NT VVS 123)

NT VVS 123

  • The test method is designed for laboratory testing of control systems for direct acting room heaters, primarily for single family houses. This method denotes such a system as an electric-heat controller. The electric-heat controller may consist of either a central unit or several individual or coordinated local units.

File size: 56.37 KB Download

Jet momentum flux: Determination based on the weighing of air issuing from a supply device (NT VVS 122)

NT VVS 122

  • The scope of this method is to provide a relatively simple method for measuring the kinematic momentum flux of a jet issuing from a commercial supply device.

File size: 56.35 KB Download

Flow meters: Accelerated durability testing (NT VVS 121)

NT VVS 121

  • The aim of this method is to provide an accelerated durability test for flow meters.

File size: 196.69 KB Download

Water closets: Flushing volumes less than 6 litres (NT VVS 120)

NT VVS 120

  • This NORDTEST method specifies test methods for WC pans with integral trap, for domestic use, made from vitreouschina or stainless steel, which have a nominal flush volume or less than 6 litres.

File size: 59.15 KB Download

Floor heating systems: Acceptance test (NT VVS 119)

NT VVS 119

  • The aim of this method is to provide a simple test for documenting that, on completion of the installation, a hot water floor heating system fulfils design specifications for heating requirements. In addition, the method also requires the installer to provide full documentation of the floor heating installation.

File size: 92.97 KB Download

Ventilation: Local mean age of air -homogeneous emission techniques (NT VVS 118)

NT VVS 118

  • The aim of this test method is to test ventilation performance in buildings, including premises which cannot be treated as a single well mixed zone.

File size: 97.99 KB Download

Electret filters: Determination of the electrostatic enhancement factor of filter media (NT VVS 117)

NT VVS 117

  • This Nordtest method is intended to be used in the testing of fibrous filter materials, The purpose of the test is to determine whether the efficiency of a filter material is dependent on the electrostatic removal mechanism and to provide quantitative information about the importance of the electrostatic removal mechanism.

File size: 88.26 KB Download

Indoor air quality: Measurement of co2 (NT VVS 114)

NT VVS 114

  • This method determines the overall function of the ventilation system by measuring the carbon dioxide, CO2 generated by the occupants. The primary intention is to measure the room air concentration, CR with one gas analyser. However by using two or more gas analysers the effectiveness or local ventilation index can also be obtained.

File size: 68.51 KB Download

Testing and evaluation of long term performance of solar collectors: Thermal performance, reliability and durability after one year’s outdoor exposure under stagnation conditions (NT VVS 112)

NT VVS 112

  • The objective of a one-year outdoor exposure under stagnation conditions is to ascertain whether the design of the collector has serious shortcomings in respect of design details or choice of materials that would degrade its pet-formante under realistic operating conditions.

File size: 33.77 KB Download

Solar collectors: Resistance of solar collectors to snow and wind loading NT VVS 111)

NT VVS 111

  • The purpose of these tests is to determine the ability of a collector cover plate to withstand the uniformly distributed loading resulting from positive and negative wind pressures and positive snow pressure.

File size: 32.03 KB Download

Solar collectors: Testing the solar collector’s ageing and corrosion characteristics (NT VVS 110)

NT VVS 110

  • 1.1 This method applies to solar collectors used for converting solar radiation into heat energy.

    1.2 This method covers collectors capable of being tested as independent units with forced circulation of the heat transfer medium.

    1.3 This method covers both concentrating and nonconcentrating collectors.

    1.4 This method does not cover the installation or mounting of solar collectors.

    1.5 This method covers component materials, materials performance and methods of test.

File size: 101.46 KB Download

Thermometers, contact, direct reading: Calibration (NT VVS 103)

NT VVS 103

  • The scope of this method is to function as a guideline for the calibration of direct-reading contact thermometers by means of the comparison technique.

File size: 177.42 KB Download

Thermometers, liquid-in-glass: Calibration (NT VVS 102)

NT VVS 102

  • The scope of this method is to function as a guideline for the calibration of liquid-in-glass thermometers by means of the comparison technique.

File size: 75.92 KB Download

Joints for cast iron pipes: Fitness and tightness of elastomeric seals (NT VVS 101)

NT VVS 101

  • The purpose of this Nordtest method is to test the fitness and tightness of joints between fittings and pipes of cast iron, when these are subjected to temperature changes, pressure, bending forces, deviation from alignment and other changes present in pipes in gravity sewers.

File size: 155.08 KB Download

Magnetic valves: Functional and operational qualities (NT VVS 100)

NT VVS 100

  • This Nordtest method describes a test method for the functional and operational qualities of magnetic valves.

File size: 301.12 KB Download

Fixed airflow measuring devices: Sensitivity to flow disturbance (NT VVS 098)

NT VVS 098

  • The purpose of this method is to evaluate the sensitivity to flow disturbance of fixed air flow measuring devices.

File size: 121.20 KB Download

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: 45.22 KB Download

Drinking water, mechanical filters: Reliability (NT VVS 096)

NT VVS 096

  • This Nordtest method has been prepared to test the functional safety of mechanical filters for drinking water intended for private households and public use.

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.

File size: 63.34 KB Download

Active leakage detectors: Reliability (NT VVS 094)

NT VVS 094

  • Active leakage detectors are components designed for stopping water leakage from water pipes and technical installations.

File size: 33.85 KB Download

Air valves - drainage systems: Airtightness and flow resistance (NT VVS 093)

NT VVS 093

  • This Nordtest method may be used for determining the tightness and flow resistance of air valves for gravity drainage systems.

File size: 56.92 KB Download

Heating systems, deaerators: Capacity and efficiency, various water flows (NT VVS 090)

NT VVS 090

  • This NORDTEST method describes tests of maximum deaeration capacity and deaeration efficiency at various water flows for deaerators.

File size: 337.50 KB Download

Thermal anemometers low velocities: Frequency response and time-constant or cut-off frequency (NT VVS 089)

NT VVS 089

  • This method is to be used for the determination of the frequency response in the range 0.5 - 7 Hz of low velocity anemometers. The cut-off frequency or time constant is taken as a single measure of the frequency response.

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