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In the CMCs uncertainty statements, the notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a 2 + b 2]1/2
Unless otherwise stated the expanded uncertainties given below correspond to k = 2 (at a 95 % level of confidence)
India, NPLI (CSIR National Physical Laboratory of India)
Matrix or material Analyte or component Dissemination range of measurement capability Range of certified values in reference materials
Amount-of-substance fraction in nmol/mol Absolute expanded uncertainty in nmol/mol Amount-of-substance fraction in Absolute expanded uncertainty in
air ozone 0 to 500
  • Uncertainty equation CMC : Q[1.0, 0.022x(O3)]

    The uncertainty is expressed in nmol/mol

  • Mechanism for measurement service delivery : Calibration service with SRP
  • The notation Q[a, b] stands for the root-sum-square of the terms between brackets: Q[a, b] = [a2 + b2]1/2
  • Approved on 20 January 2016
  • Institute service identifier : 01
Sound measuring instruments , Free-field response level : 40 dB (reference: 20 µPa) to 130 dB (reference: 20 µPa)
Sound level meter
Absolute expanded uncertainty : 0.4 dB
IS 15575-2000/IEC 61672-1
Frequency : 315 Hz to 1000 Hz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1501
Sound calibrators , Sound pressure level : 94 dB (reference: 20 µPa) to 120 dB (reference: 20 µPa)
Sound calibrator, multi-frequency
Absolute expanded uncertainty : 0.15 dB
IEC 60942
Frequency : 31.5 Hz to 4 kHz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1401
Sound calibrators , Sound pressure level : 94 dB (reference: 20 µPa) to 120 dB (reference: 20 µPa)
Sound calibrator, multi-frequency
Absolute expanded uncertainty : 0.25 dB
IEC 60942
Frequency : 5 kHz to 16 kHz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1401
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS2P microphone
Absolute expanded uncertainty : 0.12 dB
IEC 61094-2
Frequency : 16 kHz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1201
Linear vibration , Charge sensitivity (modulus)
Accelerometer
Relative expanded uncertainty : 1.5 %
Comparison, ISO 16063-21
Frequency : 40 Hz < f <= 1.6 kHz
Approved on 12 January 2012
Institute service identifier : AUV.NPL.1201V
AC power , AC power and energy: single phase (frequency <= 400 Hz), apparent energy : 10 to 6.91E6
Energy meter
Relative expanded uncertainty : 8.0E1 µVAs (VAs)-1 to 1.5E2 µVAs (VAs)-1
{"row_1":{"col_1":"","col_2":"Frequency range","col_3":"Voltage","col_4":"Current","col_5":"Expanded uncertainty"},"row_2":{"col_1":"30 VAs to 864000 VAs ","col_2":"40 Hz to 70 Hz","col_3":"30 V to 288 V","col_4":"0.01 A to 30 A","col_5":"80 to 100"},"row_3":{"col_1":"&gt; 864000 VAs to 6912000 VAs","col_2":"40 Hz to 70 Hz","col_3":"&gt; 288 V to 576 V","col_4":"&gt; 30 A to 120 A","col_5":"100 to 150"}}
The expanded uncertainties given in this table are expressed in µVAs/Vas
Comparison
Frequency : 40 Hz to 70 Hz
Voltage : 30 V to 576 V
Current : 0.01 A to 120 A
Time at maximum range: 100 s and at minimum range: 1800 s
Approved on 10 November 2014
Institute service identifier : NPLI/50
AC power , AC power and energy: single phase (frequency <= 400 Hz), apparent power : 0.1 VA to 6.91E4 VA
Power meter
Relative expanded uncertainty : 8.0E1 µVA (VA)-1 to 1.5E2 µVA (VA)-1
{"row_1":{"col_1":"","col_2":"Frequency range","col_3":"Voltage","col_4":"Current","col_5":"Expanded uncertainty"},"row_2":{"col_1":"0.1 VA to 8640 VA","col_2":"40 Hz to 70 Hz","col_3":"10 V to 288 V","col_4":"0.01 A to 30 A","col_5":"80 to 100"},"row_3":{"col_1":"&gt; 8640 VA to 69120 VA","col_2":"40 Hz to 70 Hz","col_3":"&gt; 288 V to 576 V","col_4":"&gt; 30 A to 120 A","col_5":"100 to 150"}}
The expanded uncertainties given in this table are expressed in µVA/VA
Comparison
Frequency : 40 Hz to 70 Hz
Voltage : 10 V to 576 V
Current : 0.01 A to 120 A
Approved on 10 November 2014
Institute service identifier : NPLI/47
Radio frequency measurements , Scalar RF reflection coefficient and attenuation: attenuation in coaxials : 0.05 dB to 60 dB
Passive device: fixed / variable attenuator / attenuator and signal calibrator
Relative expanded uncertainty : 7.0E-3 dB/10 dB
Substitution technique
Frequency : 30 MHz
Approved on 10 November 2014
Institute service identifier : NPLI/74
Radio frequency measurements , Scalar RF reflection coefficient and attenuation: attenuation in coaxials : 0.1 dB to 60 dB
Passive device: fixed / variable attenuator
Relative expanded uncertainty : 2.0E-2 dB/10 dB
Intermediate frequency substitution technique
Frequency : 1 GHz to 18 GHz
Approved on 10 November 2014
Institute service identifier : NPLI/75
High voltage and current , AC high voltage ratio: ratio error : -0.02 to 0.02
Voltage transformer, V.T. bridge
Relative expanded uncertainty : 6.0E1 µV/V
Comparison
Voltage : 10 V to 100 kV (50 Hz)
Approved on 10 November 2014
Institute service identifier : NPLI/62
High voltage and current , High DC voltage: ratios : 1.00E-4 V/V to 1.00E-3 V/V
High voltage resistive divider
Relative expanded uncertainty : 2.0E-5
Comparison
Voltage : 1 kV to 100 kV
Approved on 10 November 2014
Institute service identifier : NPLI/59
DC current (up to 100 A) , DC current meters: intermediate values : 1.00E-4 A to 20 A
Multifunction transfer standard, multimeter
Relative expanded uncertainty : 5.5 µA/A to 1.0E1 µA/A
{"row_1":{"col_1":"","col_2":"Relative expanded uncertainty / (µA/A)"},"row_2":{"col_1":"1E-04 A to 2 A","col_2":"5.5 to 7"},"row_3":{"col_1":"2 A to 20 A","col_2":"7 to 10"}}
Voltage drop across reference resistor
Approved on 10 November 2014
Institute service identifier : NPLI/19
DC current (up to 100 A) , DC current sources: intermediate values : 1.00E-4 A to 20 A
Current generator, calibrator
Relative expanded uncertainty : 5.5 µA/A to 1.0E1 µA/A
{"row_1":{"col_1":"","col_2":"Relative expanded uncertainty / (µA/A)"},"row_2":{"col_1":"1E-04 A to 2 A","col_2":"5.5 to 7"},"row_3":{"col_1":"2 A to 20 A","col_2":"7 to 10"}}
Voltage drop across reference resistor
Approved on 10 November 2014
Institute service identifier : NPLI/17
High voltage and current , High DC current: sources : 10 A to 600 A
Direct current source
Relative expanded uncertainty : 5.0E2 µA/A
V-I method
Approved on 10 November 2014
Institute service identifier : NPLI/59-1
Pressure , Absolute pressure: gas medium : 6.5 kPa to 360 kPa
Pressure measuring device
Absolute expanded uncertainty
(1.4E-01)2 + (12E-06p)2]1/2, p pressure in Pa

p pressure in Pa

The uncertainty is expressed in Pa

Direct comparison with standard
Gas species : Nitrogen
Gas purity : 99.9 % or better
Temperature : 23 °C
Approved on 12 October 2009
Institute service identifier : NPLI/28
Pressure , Gauge pressure: gas medium : 0.036 MPa to 4 MPa
Pressure measuring device, pressure balance
Absolute expanded uncertainty
22E-06p

p pressure in MPa

The uncertainty is expressed in MPa

Direct comparison with standard
Gas species : Nitrogen
Gas purity : 99.9 % or better
Temperature : 23 °C
Approved on 12 October 2009
Institute service identifier : NPLI/30
Viscosity , Kinematic viscosity : 1.00E-3 mm2/s2 to 0.01 mm2/s2
Newtonian liquids
Relative expanded uncertainty : 0.26 %
Capillary viscometer
Temperature : 20 °C to 100 °C
The uncertainty of the viscosity of water (ISO/TR 3666 (1998), 0.17%) is not taken into account
Approved on 24 May 2011
Institute service identifier : NPLI/21
Viscosity , Kinematic viscosity : 100 mm2/s to 1.00E4 mm2/s
Newtonian liquids
Relative expanded uncertainty : 0.35 %
Reference liquids
Temperature : 20 °C to 100 °C
The uncertainty of the viscosity of water (ISO/TR 3666 (1998), 0.17%) is not taken into account
Approved on 24 May 2011
Institute service identifier : NPLI/26
Force , Force: compression, tension : 10 kN to 1000 kN
Force measuring device
Relative expanded uncertainty : 1.2E-2 %
Lever amplification
Approved on 24 March 2014
Institute service identifier : NPLI/17

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