PRESSURE LABORATORY
       
      Quantity - pressure.
      Unit - Pa.
      Tasks of the laboratory
      The principal task of the laboratory is an establishment of the National pressure standard.
      International comparisons
      COOMET project 115/RU/95, EUROMET project No. 439.
  Available metrological services
      The laboratory provides calibration/ verification services for the most precise pressure measurement instruments in the following pressure ranges:
     
Gauge type Medium Range Combined Standard Uncertainty
piston gauges gas (3 - 7000) kPa 3·10-5
piston gauges liquid (2 - 100) MPa 5·10-5
ball gauges gas (3 - 7000) kPa 3·10-5
electromechanical manometers gas (3 - 7000) kPa 3·10-5
electromechanical manometers liquid (2 - 100) MPa 5·10-5
pressure transducer gas (3 - 7000) kPa 5·10-5
pressure transducer liquid (2 - 100) MPa 8·10-5
pressure transmeters gas (3 - 7000) kPa 5·10-5
pressure transmeters liquid (2 - 100) MPa 8·10-5
liquid manometers gas (0 - 10) MPa 3·10-5
barometers gas (11 - 270) kPa 4·10-5
micromanometers gas (0 - 10) MPa 5·10-4
bourdon type manometers gas (3 - 7000) kPa 5·10-5
bourdon type manometers liquid (2 - 100) MPa 8·10-5
tyre pressure manometers gas (0 - 10) MPa 5·10-4
    Methods of measurement:
      - all the pressure balances are routinely calibrated using the crofloating methods fllowing the principles described in the Laboratory calibration procedure that corresponds the OIML recommendation No.110. The EA G26 guide can ce used if the client wish to calibrate his instruments following the principles based on this document;
- the pressure transducers and transmitters are calibrated following the procedures included in the Laboratory calibration procedures following the principles included in the EN 770 standard;
- all the other instruments are directly calibrated by the corresponding laboratory standard following the Laboratory calibration procedure.
       
  Supplementary activities
      Special pressure guges calibrations according the client's requirements are available. Special pressure measurements, pressure measurements instruments pattern tests and pattern approval, pressure measurements instruments metrological assessments, calibration laboratory assessment and calibration laboratory staff training is available as well.
       
  Instruments in use
     
The National Standard operating in the range (0.2 - 6) MPa based on an Oil Operating Piston Gauge		 The custom made oil operated piston gauge National Standards consisting of a group of piston cylinder units operating in the range (0.2 - 6) MPa, which effective areas were determined from dimensional measurements. The custom made oil operated piston gauge standards consisting of a group of piston cylinder units operating in the range (10 - 100) MPa traceable to the National Standard. The custom made gas operated piston gauge standards consisting of a group of piston cylinder units operating in the range (0.2 - 7) MPa traceable to the National Standard.
A set of all-purpose piston - cylinder units that can accommodate various manufactures piston - cylinder units for calibration purposes.
Water column micromanometer operating in the range (0 -1.5) kPa or (0 -3) kPa traceable to the National Standard.
All the pressure balances can be calibrated with the combined standard uncertainty lower than 50·10-6.
     
Contact
Mr. Peter Farár Mr. Miroslav Chytil
phone: + 421 2 60294 675 phone: + 421 2 60294 683
e-mail: farar@smu.gov.sk e-mail: chytil@smu.gov.sk