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meters must incorporate both upstream and downstream in the gas circuit a static pressure tapping for measuring the pressure absorption;
plinomeri morajo imeti statične tlačne izpustne odprtine pred in za merilnim elementom za merjenje padca tlaka;
the meters must incorporate a pressure tapping permitting, if necessary indirectly, the determination of the pressure immediately upstream of the turbine wheel as a reference pressure.
plinomeri morajo imeti tlačno izpustno odprtino, ki po potrebi omogoča posredno ugotavljanje referenčnega tlaka takoj nad turbinskim kolesom.
the installation shall, as necessary, be equipped with temperature and pressure tappings, especially when the operation or testing of the measuring systems requires a knowledge of these factors.
instalacija mora po potrebi imeti priključke za merjenje temperature in tlaka, zlasti če je pri obratovanju in preskušanju merilnega sistema treba poznati te dejavnike.
in the case of slit-shaped pressure tappings, slits must have a width of at least 2 mm and a cross-section in the direction of flow of at least 10 mm2.
v primeru tlačnih izpustnih odprtin v obliki reže, morajo biti reže široke najmanj 2 mm, v smeri pretoka pa morajo imeti v prerezu najmanj 10 mm2.
the pressure tappings for the reference pressure must be clearly and indelibly marked "pr" and the pressure tapping should be indicated as "p".
tlačne izpustne odprtine za referenčni tlak morajo biti jasno in neizbrisno označene s »pr«, tlačne izpustne odprtine pa s »p«.
the pump pressures must be measured at tappings on the pump rather than at the external piping on the pump inlet and outlet.
tlake črpalk je treba izmeriti na merilnih priključkih na črpalki in ne na zunanjih ceveh na sesalni ali izpušni cevi črpalke.