International Memberships
- Metre Convention (Diplomatic Treaty) - since 2001
- International Committee of Weights and Measures Mutual Recognition Arrangement (CIPM-MRA) - since 2001
- Asia Pacific Metrology Programme (APMP) - since 1977
- Asia Pacific Legal Metrology Forum (APLMF) - since 1999
- ASEAN Consultative Committee Standards and Quality (ACCSQ) - since 1993
- National Conference of Standards Laboratories International (NCSLI, USA) - since 2010
International Comparison
The Mutual Recognition Arrangement of International Committee for Weights and Measures (CIPM MRA) is the supporting structure through the National Metrology Institutes (NMIs) in corroborate the international equivalence of their measurement standards and the calibration and measurement certificates issued by them. The technical basis of CIPM MRA is the set of results obtained for certain range of time through scientific key comparison carried out by the Consultative Committees (CCs) of the CIPM, the International Bureau of Weights and Measures (BIPM) and the Regional Metrology Organizations (RMOs). Essentially, there are two types of key comparisons:
- CIPM key comparisons – The international scope that carried out by those participants that having the highest level of skills in related measurement. This type of comparisons are restricted to laboratories of Member States. From CIPM key comparisons, the reference value will be delivered for the chosen key quantity.
- RMO key comparisons – The regional scope (SIM, AFRIMET, EURAMET, APMP, COOMETS, GULFMETS) organized at the scale of a region (may include the additional participants from other regions) and open to the laboratories of associates as well as Member States. From these key comparisons, the complementary information will be delivered without any change in the reference value.
The CIPM relegates the task of organizing the comparisons to Consultative Committees (CCs). Each CC chooses the key quantities to be compared in its field of expertise, approve the protocols of the key comparisons, and approves their results before getting published in the key comparison database (KCDB).
The RMOs organize related RMO key comparisons with a number of common participants and with protocols allowing their results to be linked to those of the CC key comparison once these are treated in terms of equivalence. The nomenclature used in KCDB reflects this organization; for instance CCAUV.A-K1 is the CC comparison to which the regional equivalents APMP.AUV.A-K1, EURAMET.AUV.A-K1, etc are linked.
CC and RMO key comparisons are carried out over specific given period of time. The result then analysed and published. The procedure may be repeated, in part or in full according to need. However, different organizational scheme is required the unique international facilities that kept in BIPM, Paris. For these, comparisons are organized as ongoing the series of bilateral comparisons between the BIPM and outside laboratories, and continue as long as there is a need.
The results for both of the international comparisons will be published by the BIPM and maintained in the CIPM MRA database (the KCDB). As dedicated metrology institute, NMIM has participated in RMO key comparisons since 1996 started with vibration acceleration. Calibration and Measurement Capabilities (CMCs) declared by NMIM were respectively added on 4th October 2001 (date of MRA signature by Malaysia).
No. | Name of Comparison | Field | Project No. | Date at NMIM |
|---|---|---|---|---|
1. | Automotive Gas mixtures (CO, Propane in Nitrogen) | Gas Metrology | APMP FG CCCA Action III (NMIM & KRISS) | Oct 2020-Feb 2021 |
2. | Proficiency Testing Scheme on precious metal | Precious Metal | IMBIH.LH-B01.PT/20 | August 2020 |
3. | Regional Key Comparison Pressure Calibration of Laboratory Standard Microphone LS1P | AUV | APMP.AUV.A-K5 | August 2020 |
4. | Comparison on Realization of Aluminium Freezing Point | Temperature | APMP.T-K4.2 | October 2019 |
5. | CH4 in Nitrogen | Gas Metrology | APMP.QM-S7.1 | June 2018 |
6. | Comparison of Blackbody for clinical infrared ear thermometer (35.5 oC – 41.5 oC). | Radiation Thermometry | APMP T-S15 | 2018 |
7. | APMP TCTF Stopwatch Comparison | Time and Frequency (Time Interval Measurement) | July 2018 – June 2019 | |
8. | Bilateral Comparison of Tachometer | Time and Frequency (Time Interval Measurement) | Bilateral ( Malaysia & Panama) | January – May 2018 |
9. | Comparison on pH measurement (phthalate buffer) | Electrochemistry | APMP.QM-K91 | 2015 |
10. | Determination of elements (calcium and cadmium) in drinking water | Inorganic | APLAC T095 | 2015 |
11. | Propane in nitrogen | Gas Analysis | APMP.QM-K111 | 2014 - 2015 |
12. | Comparison of high dew point temperature | Thermometry, Humidity | APMP.T-K8 | 2014 |
13. | Data acquisition and process in qNMR method | Organic | CCQM P150 | 2014 |
14. | Local realization of radiation thermometer scale from silver point to 2800 °C Temperature: 960 °C to 2800 °C | Thermometry, Pyrometry | APMP.T-S12 | 2013 - 2016 |
15. | Local realization of radiation thermometer scale from indium point to 2000 °C. Temperatures from 156 °C to 2000 °C, and indium, tin, zinc, aluminium, silver and copper points | Thermometry, Pyrometry | APMP.T-S11 | 2013 - 2016 |
16. | Arsenic and cadmium measurement in brown rice | Inorganic | APMP.QM-P21 | 2013 |
17. | Pb, As and Hg measurements in cosmetic (cream) | Inorganic | APMP.QM-P24 | 2013 |
18. | pH measurement of borate buffer, pH 9.18 | Electrochemistry | APMP.QM-K19 | 2013 |
19. | Luminous intensity in cd | Photometry and Radiometry, Photometry | APMP.PR-K3.a | 2012 - 2014 |
20. | L-Valine (Characterization of organic substances for chemical purity) | Organic | CCQM-K55.c | 2012 |
21. | Power in 50 ohm coaxial lines Calibration factor Frequency: 10 MHz, 50 MHz, 1 GHz, 4 GHz, 8 GHz, 12 GHz, 15 GHz, and 18 GHz | Electricity and Magnetism, Radio frequencies | APMP.EM.RF-K8.CL | 2012 - 2013 |
22. | Trace and Essential elements in Herba Ecliptae | Inorganic | APMP.QM-P18 | 2011 |
23. | Determination of ethanol in aqueous matrix | Organic | AFRIMETS.QM-K27 | 2011 |
24. | Pesticide residue in tea | Organic | APMP PT 11-02 | 2011 |
25. | Essential and Toxic Elements in Seafood | Inorganic | APMP.QM.S5 | 2011 |
26. | Comparison on digital multimeter DC voltage, current and resistance | Electricity and Magnetism, DC Voltage and Current | APMP.EM-S8 | 2011 - 2013 |
27. | Comparison of resistance standards Resistance: 10 megaohms and 1 gigaohm | Electricity and Magnetism, Resistance | APMP.EM-K2 | 2010 - 2011 |
28. | AC power at 50 Hz/60 Hz Power factor: 1.0, 0.5 Lead, 0.5 Lag, 0.0 Lead, 0.0 Lag | Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer | APMP.EM-K5.1 | 2010 - 2013 |
29. | DC voltage, Zener diode DC voltage: 1.018 V and 10 V | Electricity and Magnetism, DC Voltage and Current | APMP.EM.BIPM-K11.3 | 2009 - 2011 |
30. | pH measurement of phosphate buffer solutions (pH ~ 6.86) | Electrochemistry | APMP.QM.K9 | 2009 - 2010 |
31. | Comparison of sound calibrators Sound pressure level: 94 dB and 114 dB Frequency: 31.5 Hz to 16000 Hz | Acoustics, Ultrasound, and Vibration, Acoustics | APMP.AUV.A-S1 | 2008 - 2010 |
32. | Diameter standards Internal diameter: 5 mm to 100 mm | Length, Dimensional Metrology | APMP.L-K4 | 2008 - 2010 |
33. | Comparison of water triple point cells Temperature: 273.16 K | Thermometry, Fixed Point Cells | APMP.T-K7 | 2007 - 2009 |
34. | Pressure measurements in oil (gauge mode) Pressure: 10 MPa to 100 MPa | Mass, Pressure | APMP.M.P-K7.1 | 2007 |
35. | Gauge block by mechanical comparison Central length of gauge block | Length, Dimensional Metrology | APMP.L-S3 | 2006 - 2009 |
36. | Luminous flux | Photometry and Radiometry, Photometry | APMP.PR-K4 | 2006 - 2007 |
37. | Comparison using Type R thermocouples Temperature: 0 °C to 1100 °C | Thermometry, Thermocouples | APMP.T-S1 | 2005 - 2006 |
38. | Gauge blocks by interferometry Central length: 0.5 mm to 100 mm | Length, Dimensional Metrology | APMP.L-K1.1 | 2005 - 2006 |
39. | Comparison of industrial thermometers Temperature: -40 °C to 250 °C | Thermometry, Industrial Thermometry | APMP.T-S3 | 2004 |
40. | Comparison of primary wavelength standards Absolute frequency of the reference component of the recommended radiation at wavelength 633 nm for the practical realization of the definition of the metre | Length, Laser Frequencies | APMP.L-K11 | 2004 |
41. | Comparison of capacitors Capacitance: 10 pF Frequency: 1592 Hz | Electricity and Magnetism, Capacitance | APMP.EM-K4.1 | 2004 - 2006 |
42. | Comparison of laboratory standard microphone calibrations. Sound pressure. Frequency: 63 Hz to 8 kHz | Acoustics, Ultrasound, and Vibration | APMP.AUV.A-K1 | 2004 - 2005 |
43. | Comparison of local realizations of Aluminium freezing-point temperatures Temperature: 660.323 °C | Thermometry, Fixed Point Cells | APMP.T-K4 | 2003 - 2005 |
44. | Comparison of capacitors Capacitance: 100 pF Frequency: 1.592 kHz, 1 kHz | Electricity and Magnetism, Capacitance | APMP.EM-S7 | 2003 - 2006 |
45. | Pressure measurements in oil (gauge mode) Pressure: 10 MPa to 100 MPa | Mass, Pressure | APMP.M.P-K7 | 2002 - 2004 |
46. | Gauge blocks by interferometry Central length: 0.5 mm to 100 mm | Length, Dimensional Metrology | APMP.L-K1 | 2001 - 2002 |
47. | AC/DC Transfer Voltage: 3 V | Electricity and Magnetism AC Voltage, Current, Power, and AC/DC Transfer | APMP.EM-K6.a | 2000 - 2003 |
48. | Realizations of the ITS-90 from 234.3 K to 692.7 K Temperature: 234.3 K to 692.7 K | Thermometry, Standard Platinum Resistance Thermometers | APMP.T-K3 | 2000 - 2003 |
49. | Long gauge blocks from 200 to 500 mm Length: 200 mm, 250 mm and 500 mm | Length, Dimensional Metrology | APMP.L-K2 | 2000 - 2002 |
50. | Comparison of humidity standards: dew point temperature Temperature: -60 °C to 20 °C, with 5 °C step | Thermometry, Humidity | APMP.T-K6 | 1999 - 2001 |
51. | Comparison of mass standards Mass: 1 kg | Mass, Mass Standards | APMP.M.M-K1 | 1999 - 2001 |
52. | Effective area of a piston-cylinder Unit Pressure: 20 kPa to 105 kPa | Mass, Pressure | APMP.M.P-K6 | 1998 - 2001 |
53. | Vibration acceleration Amplified charge sensitivity Frequency: 10 Hz to 10 kHz | Acoustics, Ultrasound, and Vibration | APMP.AUV.V-K1 | 1996 - 1997 |
