Results for: National Physical Laboratory
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Chemical Analyte
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)
Denmark, DTU (Technical University of Denmark)
Ionizing radiation
Absorbed dose/rate to water , Passive dosimeter (Alanine, Radiochromic film, Perspex) : 0.2 kGy to 100 kGy
Relative expanded uncertainty 2.9 %
Irradiation in calibrated photon field
Co-60, Irradiation in reference Co-60 gamma ray field (Gamma cell)
Reference standard : Photon beam graphite calorimeter at National Physical Laboratory
Source of traceability : National Physical Laboratory, United Kingdom
Approved on 20 April 2015
Institute service identifier : EUR-RAD-DTU-1001
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
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
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
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS1P microphone
Absolute expanded uncertainty : 7.0E-2 dB
IEC 61094-2
Frequency : 63 Hz to 2 kHz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1101
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS1P microphone
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-2
Frequency : 2.5 kHz to 8 kHz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1101
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS2P microphone
Absolute expanded uncertainty : 8.0E-2 dB
IEC 61094-2
Frequency : 125 Hz to 200 Hz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1201
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS2P microphone
Absolute expanded uncertainty : 0.12 dB
IEC 61094-2
Frequency : 31.5 Hz to 50 Hz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1201
Measurement microphones , Pressure sensitivity level
Laboratory standard microphone type: IEC 61094-1 LS2P microphone
Absolute expanded uncertainty : 0.11 dB
IEC 61094-2
Frequency : 63 Hz to 100 Hz
Approved on 23 October 2009
Institute service identifier : AUV.NPL.1201
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
Radio frequency measurements , Scalar RF reflection coefficient and attenuation: reflection coefficient in waveguides : 0.01 to 0.2
Passive device: matched termination and standard mismatche
Absolute expanded uncertainty : 2.0E-3 to 3.0E-3
Tuned reflectometer technique
Frequency : 5.8 GHz to 18 GHz (spot frequency)
Approved on 10 November 2014
Institute service identifier : NPLI/73
DC resistance , DC resistance standards and sources: multiple ranges : 10 Ω to 1.00E6 Ω
Multifunction calibrator
Relative expanded uncertainty : 0.1 mΩ/Ω to 1 mΩ/Ω
Comparison
Approved on 10 November 2014
Institute service identifier : NPLI/2.1.5
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
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
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
Linear dimensions , End standards : 0 mm to 1000 mm
Long gauge blocks
Absolute expanded uncertainty : 0.2 µm to 0.7 µm
Mechanical comparison to long gauge block using LMM or CMM
Orientation : horizontal
Approved on 04 May 2011
Institute service identifier : NPLI/9
Angle , Angle by circle dividers : 5 ° to 120 °
Optical polygon
Absolute expanded uncertainty : 0.5 " to 1 "
Indexing table and auto-collimator
Number of faces n : 3 … 72
Approved on 04 May 2011
Institute service identifier : NPLI/17-1
Linear dimensions , Diameter standards : 3 mm to 300 mm
Internal cylindrical standards, diameter
Absolute expanded uncertainty : 0.8 µm to 1.2 µm
LMM and ring gauge
Approved on 04 May 2011
Institute service identifier : NPLI/16
Angle , Angle by circle dividers : 0 ° to 360 °
Rotary table, rotary encoder
Absolute expanded uncertainty : 0.5 " to 1 "
Indexing table and auto-collimator
Approved on 04 May 2011
Institute service identifier : NPLI/17-3
Angle , Angle instruments : -1 ' to 1 '
Spirit (bubble) level
Absolute expanded uncertainty : 1 "
Tilting table and laser interferometer
Approved on 04 May 2011
Institute service identifier : NPLI/17-8

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Ionizing radiation
Ionizing Radiation

This metrology area covers the fields of dosimetry, radioactivity and neutron measurements.