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ORDIN Nr

ORDIN   Nr. 276 din 15 decembrie 1999

pentru aprobarea listei cuprinzand etaloanele nationale ale Romaniei, completata si actualizata

ACT EMIS DE: BIROUL ROMAN DE METROLOGIE LEGALA

ACT PUBLICAT IN: MONITORUL OFICIAL  NR. 99 din  6 martie 2000


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    Directorul general al Biroului Roman de Metrologie Legala,
    in temeiul art. 12 si 14 din Ordonanta Guvernului nr. 20/1992 privind activitatea de metrologie, aprobata si modificata prin Legea nr. 11/1994, cu modificarile ulterioare, si al art. 5 din Hotararea Guvernului nr. 384/1998 privind recunoasterea etaloanelor nationale,
    avand in vedere ordinele nr. 250, 252 - 272 din 29 noiembrie 1999, emise de directorul general al Biroului Roman de Metrologie Legala cu prilejul atestarii si reatestarii etaloanelor nationale ale Romaniei,
    emite urmatorul ordin:

    Art. 1
    Se aproba lista cuprinzand etaloanele nationale ale Romaniei, completata si actualizata in urma atestarii si reatestarii etaloanelor nationale, prevazuta in anexa care face parte integranta din prezentul ordin.
    Art. 2
    Etaloanele nationale constituie baza unica legala pentru reproducerea, conservarea si transmiterea unitatilor de masura tuturor celorlalte etaloane din Romania.
    Art. 3
    Etaloanele nationale prevazute in anexa sunt bunuri publice, proprietate a statului roman, administrate, intretinute, perfectionate, comparate, conservate si utilizate de Biroul Roman de Metrologie Legala prin Institutul National de Metrologie.
    Art. 4
    Prezentul ordin va fi publicat in Monitorul Oficial al Romaniei, Partea I.

                            Directorul general
                 al Biroului Roman de Metrologie Legala,
                           ing. Stefan Ocneanu

    ANEXA 1

                            LISTA
cuprinzand etaloanele nationale ale Romaniei
_______________________________________________________________________________
Marimea fizica   Denumirea etalonului  Valorile nominale,    Incertitudinea de
 (unitatea                                 intervale         reproducere a
 de masura)                                                  unitatii de masura
_______________________________________________________________________________
      0                    1                   2                    3
_______________________________________________________________________________
Lungime (metru)  Laser He-Ne           Lungime de unda:                 -11
                 stabilizat prin               -9                 5 x 10
                 absorbtie             633 x 10  m
                         127           Frecventa:
                 saturata   I2         473 612 21 715 kHz
_______________________________________________________________________________
Unghi plan       Instalatie etalon     (0... 360) grade      0,15"... 0,25"
(grad            primar de unghi plan  pentru scari          pentru scari
sexagesimal)                           circulare inchise     circulare inchise
                                       +/- 4" sau +/- 40"    0,04" sau 0,4"
                                       pentru unghiuri mici  pentru unghiuri
                                                             mici
_______________________________________________________________________________
Masa (kilogram)  Kilogram prototip            1 kg           0,0023 mg
                 national nr. 2
_______________________________________________________________________________
Presiune         Manometru cu piston   41 kPa... 17 MPa                 -6
(pascal)         si greutati Ruska,                               9 x 10
                 tip 2400, piston
                 LC-486
_______________________________________________________________________________
Timp (secunda)   Etalon de frecventa           5             1 microsecunda
                 cu cesiu tip          1 Hz; 10  Hz;         pentru unitatea
                 HP 5071A                                    de timp
                                         6           6
                                       10  Hz; 5 x 10  Hz
_______________________________________________________________________________
Frecventa                              100 kHz; 1 MHz;            -12
(hertz)                                5 MHz; 10 MHz         1 x 10    pentru
                                                             unitatea de
                                                             frecventa
_______________________________________________________________________________
Forta (newton)   Ansamblu de trei         5                              -5
                 masini cu incarcare    10  N                      5 x 10
                 directa a greutatilor
_______________________________________________________________________________
Tensiune         Grup de elemente       1,018 V                           -6
electrica in     normale                                          0,8 x 10
curent continuu
(volt)
_______________________________________________________________________________
Tensiune         Convertizoare          1 V; 2 V;                        -5
electrica in     termoelectrice de               5                 2 x 10
curent           tensiune alternativa   (15... 10 ) Hz
alternativ
(volt)
_______________________________________________________________________________
Rezistenta       Grup de rezistoare        1 ohm                          -6
electrica        etalon                                           0,3 x 10
  (ohm)
_______________________________________________________________________________
Capacitate       Grup de condensatoare         -12                       -6
electrica        etalon                 10 x 10    F               5 x 10
 (farad)
_______________________________________________________________________________
Inductanta       Grup de inductoare            -3                       -5
(henry)          etalon                 10 x 10   H               5 x 10
                                                                  din valoarea
                                                                  nominala
_______________________________________________________________________________
Inductie         Generator de inductie                 -6               -4
magnetica in     magnetica in aer,      (0... 120) x 10   T       1 x 10
aer (tesla)      tip cadru Helmholtz
_______________________________________________________________________________
Temperatura      Scara internationala   (-38,8344...        (0,014... 0,11) mK
(K, grad         de temperatura din     + 1.084,62)         pentru intervalul
Celsius)         1990 (SIT-90) in       grade C             (-38,8344...
                 intervalul                                 +419,527) grade C
                 (-38,8344...                                 +/- 0,2 grade C
                 +1.084,62) grade C                         (+630,74...
                                                            +1.084,43) grade C
_______________________________________________________________________________
Activitate       Instalatii si surse            9                         -3
(bequerel)       de activitate alfa,    (2... 10 ) Bq       (5... 30) x 10
                 beta si gama
_______________________________________________________________________________
Intensitate      Grup de lampi etalon   (200... 260) cd              1%
luminoasa        de intensitate
(candela)        luminoasa
_______________________________________________________________________________
Flux luminos     Grup de lampi etalon   (700... 1.100) lm            1%
(lumen)          de flux luminos
_______________________________________________________________________________
Raport de        Divizor inductiv cu o    0... 10 x 0,1                    -9
tensiuni mici    decada tip U.I.d.                           (5... 20) x 10
in curent                                                    din valoarea
alternativ de                                                nominala a
audiofrecventa                                               raportului de
(unu)                                                        tensiune
_______________________________________________________________________________
Factor spectral  Instalatie              tau (lambda) =      (0,54... 0,08)%
de transmisie    spectrofotometrica      0,0500... 1,0000    in punctele
(unu)            SFTA1                   lambda =            de comparare
                                         (340... 840) nm           0,10%
                                                             pentru restul
                                                             lungimilor de unda
_______________________________________________________________________________
Atenuare la      Grup de atenuatoare    3 dB, 6 dB, 10 dB,         0,03 dB
frecvente        fixe                   20 dB
inalte
(decibel)
_______________________________________________________________________________
Putere           Grup de senzori de     0,3 microW... 100 mW        0,8%
electrica la     masura                 10 MHz... 10 GHz
frecvente
inalte (watt)
_______________________________________________________________________________
Putere radianta  Radiometru absolut     100 nW... 100 MW     (0,03... 0,05)%
(watt)           tip capcana de                              in punctele
                 lumina - CL 01                              de comparare
                                                                  0,10%
                                                             pentru restul
                                                             lungimilor de unda

_______________________________________________________________________________
Nivel de         Grup de microfoane     100 Hz...  8 kHz          0,17 dB
presiune         si surse etalon
acustica (bel)   Bruel & Kjaer
_______________________________________________________________________________



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