Comparison
Comparison close

CCM.M-K7, GULFMET.M.M-K7 and AFRIMETS.M.M-K7

 

MEASURAND        Mass standard

NOMINAL VALUE      500 mg

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg.

500 mg
Di  (mg)
Participating institutes
CCM.M-K7
GULFMET.M.M-K7
AFRIMETS.M.M-K7

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Comparison
Comparison close

CCM.M-K7, GULFMET.M.M-K7 and AFRIMETS.M.M-K7

 

MEASURAND        Mass standard

NOMINAL VALUE      500 mg

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mg.

LABi Di Ui
mg
mg
KRISS 0.0006 0.0008
NIS 0.0010 0.0014
VNIIM -0.0009 0.0016
CENAM -0.0006 0.0014
NIST -0.0008 0.0008
PTB 0.0001 0.0006
METAS 0.0007 0.0016
CEM 0.0004 0.0010
INRiM 0.0000 0.0012
NIM -0.0011 0.0016
UME -0.0007 0.0048
METAS -0.0007 0.0016
INRIM 0.0000 0.0012
EMI 0.0001 0.0066
SASO -0.0003 0.0065
PAI 0.0236 0.0074
QGOSM 0.0040 0.0803
NIS -0.0003 0.0012
METAS -0.0004 0.0007
LPEE 0.0004 0.0080
ZMA -0.0030 0.0150
NMISA 0.0020 0.0025
KEBS -0.0002 0.0019
Participating institutes
CCM.M-K7
GULFMET.M.M-K7
AFRIMETS.M.M-K7
Comparison
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CC comparison
Linked comparison
GULFMET.M.M-K7
Metrology area, Sub-field Mass and related quantities, Mass Standards
Description Comparison of mass standards
Time of measurements 2017 - 2018
Status Approved for equivalence
Final Reports of the comparisons
Measurand Mass: 500 mg, 5 g, 10 g, 100 g and 5 kg
Transfer device Four stainless steel mass standards of nominal values 5 kg, 100 g, 10 g, 5 g and one nickel silver mass standard of nominal mass 500 mg.
Comparison type Key Comparison
Consultative Committee CCM (Consultative Committee for Mass and Related Quantities)
Conducted by GULFMET (Gulf Association for Metrology)
Comments Results published on 13 March 2020
Pilot institute UME
TÜBITAK Ulusal Metroloji Enstitüsü
Türkiye
Contact person B. Korutlu

+90 262 679 50 00
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
UME

TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET

EMI

Emirates Metrology Institute, United Arab Emirates, GULFMET

INRIM

Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET

METAS

Federal Institute of Metrology, Switzerland, EURAMET

PAI

Public Authority for industry, Kuwait, GULFMET

QGOSM

Qatar General Organization for Standards and Metrology, Qatar, GULFMET

Comparison
Comparison close

CCM.M-K7, GULFMET.M.M-K7 and AFRIMETS.M.M-K7

 

MEASURAND        Mass standard

NOMINAL VALUE      500 mg

 

The key comparison reference value xR = (m + ) at each nominal mass m was calculated as the median with the associated standard uncertainty uR

 

     m = 500 mg   d = - 0.00057 mg     uR = 0.00033 mg

 

The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms:

D and its expanded uncertainty Ui (k = 2), both expressed in mg.

 

Linking GULFMET.M.M-K7 to CCM.M-K7

The linkage was made via participation of INRIM and METAS in both key comparisons. The linking process is described in the GULFMET.M.M-K7 Final Report.

 

Linking AFRIMETS.M.M-K7 to CCM.M-K7

The linkage was made via participation of NIS and METAS in both key comparisons. The linking process is described in the AFRIMETS.M.M-K7 Final Report.

Comparison
Comparison close

CCM.M-K7, GULFMET.M.M-K7 and AFRIMETS.M.M-K7

 

MEASURAND        Mass standard

NOMINAL VALUE      500 mg

 

CCM.M-K7

The key comparison was organized in two “petals” and used two sets of mass standards.
Measurements were carried out from April 2014 to March 2015.
KRISS acted as the Pilot Laboratory.

xi : reported result obtained as the difference between the measurement of the mass standard carried out by laboratory i and its nominal value
ui : combined standard uncertainty of xi

 

PETAL A

       
  Labi xi ui
    mg mg
  KRISS - 1 0.0019 0.0003
  NIS 0.0024 0.0007
  VNIIM 0.0005 0.0008
  CENAM 0.0009 0.0007
  NIST 0.0006 0.0003
  KRISS - 2 0.0021 0.0003
       

 

PETAL B

       
  Labi xi ui
    mg mg
  KRISS - 3 0.0023 0.0003
  PTB 0.0022 0.0002
  METAS 0.0027 0.0008
  CEM 0.0024 0.0005
  INRIM 0.0020 0.0006
  NIM 0.0090 0.0008
  KRISS - 4 0.0029 0.0003
     

 

GULFMET.M.M-K7

The measurement results  of the laboratories participants in GULFMET.M.M-K7 are given in Table 5 of the GULFMET.M.M-K7 Final Report.

 

AFRIMETS.M.M-K7

The measurement results  of the laboratories participants in AFRIMETS.M.M-K7 are given in Section 7 of the AFRIMETS.M.M-K7 Final Report.

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