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| Quantity - Volume flow - volume of
liquid passing through the meter divided by the time
unit. Mass flow - mass of liquid passing through the meter divided by the time unit. Delivered mass or volume. |
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| Unit - m3/h, l/h, l/s,
l/min (volume flow), t/h, kg/h, kg/s, kg/min (mass flow). |
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| Tasks of the laboratory | ||||||||||||||||
| The main task of the
Laboratory is realisation of volume flow, mass flow,
delivered mass and volume units for liquids, calibration
of flow meters and volume meter. |
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| International
comparisons |
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Available metrological services | |||||||||||||||
| Calibration of standards of flowrate and volume flow of water and liquids (range: from 0.02 m3/h to 270 m3/h; expanded uncertainty (k=2) is 0.03 %). calibration and verification of cold water meters, hot water meters and volumetric parts of heat meters (range: from 0.02 m3/h to 270 m3/h; expanded uncertainty is 0.2 %). Calibration and verification of flow meters other than water. calibration and verification of massflow meters (range: from 0.02 m3/h to 270 m3/h; expanded uncertainty is 0.1 %). Calibration of test assemblies for water meters (range: from 0.01 m3/h to 1000 m3/h; expanded uncertainty is 0.03 %). Calibration of Volumetric Tanks (range: from 2 dm3 to 5 000 000 dm3; expanded uncertainty is 0.2 %). | ||||||||||||||||
| Methods of measurement: | ||||||||||||||||
| - verification of secondary standards is performed in an accordance with the national regulation, pattern testing og water meters is performed in an accordance with the Act of metrology of Slovak republic and in an accordance with the ISO standards. verification is performed direct with comparison the SMU standards. | ||||||||||||||||
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Instuments in use | |||||||||||||||
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For
verification of secondary standards of 1. and 2. orders
and for testing for type approval of water meters is used
the National Standard of Flowrate of cold and hot
water. It is a gravimetric standard device with
switching flappervalve, with a range of measurement up to
270 m3/h within a temperature range up to
85°C. water meters pattern testing is performed using a
reference standards - volume flow meter with a piston and
a standard electromagnetic inductance flow meter. Pattern testing of flowmeters for technical liquid as well as verification of secondary standards of technical liquids flowrate is performed using a calibrated measuring container and calibrated balance. |
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| Pattern testing and verification of meters of medium and large volume of liquid is performed using calibrated measuring containers and geometrical methods. | ||||||||||||||||
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