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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
  • KCDB ID : APMP-QM-IN-000000UD-1
     
Frequency , Frequency : 1 MHz
General frequency source
Relative expanded uncertainty : 6.4E-12 Hz/Hz
Direct frequency measurement
Gate time : 10 s
Number of measurements : 100
Amplitude : > 0.5 V (50 ohm)
Excluded DUT's effect
Approved on 15 June 2011
Institute service identifier : NPLI/6
KCDB ID : APMP-TF-IN-000005UF-1
 
Frequency , Frequency : 5.00E6 Hz
General frequency source
Relative expanded uncertainty : 9.0E-14 Hz/Hz
Time interval measurement
Measurement time : 86400 s
Amplitude : > 1 V (50 ohm)
Excluded DUT's effect
Approved on 15 June 2011
Institute service identifier : NPLI/4
KCDB ID : APMP-TF-IN-000005UD-1
 
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
KCDB ID : APMP-AUV-IN-000005YG-1
 
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
KCDB ID : APMP-AUV-IN-000005YL-1
 
AC power , AC power and energy: single phase (frequency <= 400 Hz), active energy : 10 Ws to 6.91E6 Ws
Energy meter
Relative expanded uncertainty
{"row_1":{"col_1":"","col_2":"Frequency range","col_3":"Voltage","col_4":"Current","col_5":"Power factor","col_6":"Expanded uncertainty"},"row_2":{"col_1":"10 Ws to 864000 Ws","col_2":"40 Hz to 70 Hz","col_3":"30 V to 288 V","col_4":"0.01 A to 30 A","col_5":"0.25 I/C to 1 I/C","col_6":"(50 to 60)/cos<i>φ</i>"},"row_3":{"col_1":"&gt; 864000 Ws to 6912000 Ws","col_2":"40 Hz to 70 Hz","col_3":"288 V to 576 V","col_4":"&gt; 30 A to 120 A","col_5":"0.25 I/C to 1 I/C","col_6":"(60 to 70)/cos<i>φ</i>"},"row_4":{"col_1":"40 Ws to 864000 Ws","col_2":"70 Hz to 400 Hz","col_3":"30 V to 288 V","col_4":"0.05 A to 30 A","col_5":"0.25 I/C to 1 I/C","col_6":"(70 to 200)/cos<i>φ</i>"},"row_5":{"col_1":"&gt; 864000 Ws to 6912000 Ws","col_2":"70 Hz to 400 Hz","col_3":"&gt; 288 V to 576 V","col_4":"&gt; 30 A to 120 A","col_5":"0.25 I/C to 1 I/C","col_6":"(200 to 300)/cos<i>φ</i>"}}
The expanded uncertainties given in this table are expressed in µWh/Wh
(50 to 300)/cosφ

The uncertainty is expressed in µWh (Wh)-1

Comparison
Frequency : 40 Hz to 400 Hz
Voltage : 30 V to 576 V
Current : 0.01 A to 120 A
Power factor : 0.25 I/C to 1 I/C
Time at maximum range: 100 s and at minimum range: 1800 s
Approved on 10 November 2014
Institute service identifier : NPLI/48
KCDB ID : APMP-EM-IN-000006RG-1
 
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
KCDB ID : APMP-EM-IN-000006R8-1
 
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
KCDB ID : APMP-EM-IN-000006R9-1
 
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
KCDB ID : APMP-EM-IN-000006R2-1
 
DC voltage (up to 1100 V) , DC voltage sources: intermediate values : 10 V to 1000 V
DC voltage source, multifunction calibrator
Relative expanded uncertainty : 1.5 µV/V to 4.5 µV/V
{"row_1":{"col_1":"","col_2":" Expanded uncertainty","col_3":"******** Instrument ********"},"row_2":{"col_1":"1 V","col_2":"80 nV","col_3":"Solid state voltage standard"},"row_3":{"col_1":"1.018 V","col_2":"80 nV","col_3":"Solid state voltage standard"},"row_4":{"col_1":"10 V","col_2":"350 nV","col_3":"Solid state voltage standard"},"row_5":{"col_1":"1.018 V to 12 V","col_2":"1 µV/V","col_3":"Standard cell"},"row_6":{"col_1":"10 µV to 10 V","col_2":"1.5 µV to 15 µV","col_3":"DC voltage source, multifunction calibrator"},"row_7":{"col_1":"10 V to 1000 V","col_2":"1.5 µV/V to 4.5 µV/V","col_3":"DC voltage source, multifunction calibrator"},"row_8":{"col_1":"10 µV to 1 mV","col_2":"1.5 µV","col_3":"DC voltmeter, multimeter"},"row_9":{"col_1":"1 mV to 10 V","col_2":"1.5 µV to 15 µV","col_3":"DC voltmeter, multimeter"},"row_10":{"col_1":"10 V to 1000 V","col_2":"1.5 µV/V to 4.5 µV/V","col_3":" Multifunction transfer standard, DC voltmeter"}}
Resistive divider
Approved on 10 November 2014
Institute service identifier : NPLI/4
KCDB ID : APMP-EM-IN-000006RI-1
 
DC voltage (up to 1100 V) , DC voltage ratios: up to 1100 V : 0.1 to 100
Resistive divider
Relative expanded uncertainty : 2 µV/V
Comparison with reference divider
Input voltage : 1 V to 1000 V
Approved on 10 November 2014
Institute service identifier : NPLI/8
KCDB ID : APMP-EM-IN-000006RK-1
 
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
KCDB ID : APMP-EM-IN-000006QX-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
KCDB ID : APMP-M-IN-00000FXB-1
 
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
KCDB ID : APMP-M-IN-00000FXD-1
 
Pressure , Gauge pressure: gas medium : 4 MPa to 8 MPa
Pressure measuring device, pressure balance
Absolute expanded uncertainty
26E-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/31
KCDB ID : APMP-M-IN-00000FXE-1
 
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
KCDB ID : APMP-M-IN-00000FYL-1
 
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
KCDB ID : APMP-M-IN-00000FYQ-1
 
Force , Force: compression, tension : 500 N to 5.00E4 N
Force measuring device
Relative expanded uncertainty : 3.0E-3 %
Deadweight
Approved on 24 March 2014
Institute service identifier : NPLI/15
KCDB ID : APMP-M-IN-00000FYO-1
 
Force , Force: compression, tension : 1 kN to 100 kN
Force measuring device
Relative expanded uncertainty : 3.0E-3 %
Deadweight
Approved on 24 March 2014
Institute service identifier : NPLI/16
KCDB ID : APMP-M-IN-00000FYP-1
 
Spectral.-int. meas. for sources and detectors , Correlated colour temperature : 2000 K to 3000 K
Tungsten lamp
Absolute expanded uncertainty : 2.0E1 K
Colorimeter
Approved on 29 September 2001
KCDB ID : APMP-PR-IN-000004YE-1
 

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Acoustics, Ultrasound, Vibration

This metrology area covers the fields of acoustics, ultrasound and vibration.

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