Calibrations Scope

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Electrical SCOPE ISO 17025-2005

 

    The Least uncertainties of measurement for Electrical quantity/measurement as per the ISO GUM:-
1.0INDICATING AND RECORDING INSTRUMENTS 
        
 MEASUREMENT FUNCTION WITH LEAST UNCERTAINTIES OF MEASUREMENT    
        
1.0.1DC VOLTMETER Tol(%)Floor   
  0 TO ± 330.00 mV 0.00472E-06   
 0 TO ± 3.3 V 0.00394E-06   
 0 TO ± 33.0 V 0.00394E-05   
 0 TO ± 330.0 V 0.00434E-04   
 0 TO ± 1020 V 0.00431E-03   
        
        
1.0.2DC CURRENT  Tol(%)Floor   
  0 TO ± 330.00 µA 0.01162E-08   
 0 TO ± 3.3 mA 0.01014E-08   
 0 TO ± 33.0 mA 0.00782E-07   
 0 TO ± 330.0 mA 0.00782E-06   
 0 TO ± 3.0 A 0.02953E-05   
 0 TO ± 10.0 A 0.04654E-04   
 0 TO ± 20.5 A 0.07756E-04   
        
1.0.3RESISTANCE Tol(%)Floor   
 0 TO 11 Ohm 0.00938E-04   
 11 TO 33 Ohm 0.00931E-03   
 33 TO 110 Ohm 0.00701E-03   
 110 TO 330 Ohm 0.00702E-03   
 330 TO 1.1 kOhm 0.00702E-03   
 1.1 TO 3.3 kOhm 0.00702E-02   
 3.3 TO 11 kOhm 0.00702E-02   
 11 TO 33 kOhm 0.00702E-01   
 33 TO 110 kOhm 0.00852E-01   
 110  TO 330 kOhm 0.00932E+00   
 330 TO 1.1 MOhm 0.01162E+00   
 1.1 TO 3.3 MOhm 0.01162E+01   
 3.3 TO 11 MOhm 0.04654E+01   
 11TO 33 MOhm 0.07752E+03   
 33 TO 110 MOhm 0.38762E+03   
 110 TO 330 MOhm 0.38768E+04   
 330 TO 1.1 GOhm 1.16284E+05   
        
        
1.0.4AC VOLTAGEFREQUENCYTol(%)Floor   
 1.0 to 33 mV0.01 Hz to 10 Hz3.8761E-04   
  10 Hz to 45 Hz0.1162E-05   
  45 Hz to 10 kHz0.0782E-05   
  10 to 20 kHz0.1162E-05   
  20 to 50 kHz0.1552E-05   
  50 to 100 kHz0.2713E-05   
  100 to 500 kHz0.7755E-05   
        
 33 to 330 mV0.01 Hz to 10 Hz3.8761E-03   
  10 Hz to 45 Hz0.0392E-05   
  45 Hz to 10 kHz0.0232E-05   
  10 to 20 kHz0.0542E-05   
  20 to 50 kHz0.0783E-05   
  50 to 100 kHz0.1781E-04   
  100 to 500 kHz0.3883E-04   
        
 330 to 3.3 V0.01 Hz to 10 Hz3.8761E-02   
  10 Hz to 45 Hz0.0395E-05   
  45 Hz to 10 kHz0.0235E-05   
  10 to 20 kHz0.0545E-05   
  20 to 50 kHz0.0785E-05   
  50 to 100 kHz0.1782E-04   
  100 to 500 kHz0.3887E-04   
        
 3.3  to 33.0 V0.01 Hz to 10 Hz3.8761E-01   
  10 Hz to 45 Hz0.0396E-04   
  45 Hz to 10 kHz0.0235E-04   
  10 to 20 kHz0.0545E-04   
  20 to 50 kHz0.0785E-04   
  50 to 100 kHz0.1782E-03   
        
 33.0  to 330.0 V45 Hz to 1 kHz0.0392E-03   
  1 to 10 kHz0.0627E-03   
  10 to 20 kHz0.0707E-03   
  20 to 50 kHz0.0937E-03   
  50 to 100 kHz0.1866E-02   
        
 330.0  to 1020.0 V45 Hz to 1 kHz0.0392E-02   
  1 to 5 kHz0.0622E-02   
  5 to 10 kHz0.0702E-02   
        
        
1.0.5AC CURRENTFREQUENCYTol(%)Floor   
        
 29 to 330 µA10 to 20 Hz0.1558E-08   
  20 to 45 Hz0.1168E-08   
  45 Hz to 1 kHz0.0978E-08   
  1 to 5 kHz0.2331E-07   
  5 to 10 kHz0.6202E-07   
  10 to 30 kHz1.2403E-07   
        
 330 to 3.3 mA10 to 20 Hz0.1551E-07   
  20 to 45 Hz0.0971E-07   
  45 Hz to 1 kHz0.0781E-07   
  1 to 5 kHz0.1552E-07   
  5 to 10 kHz0.3882E-07   
  10 to 30 kHz0.7755E-07   
        
 3.3 to 33 mA10 to 20 Hz0.1402E-06   
  20 to 45 Hz0.0702E-06   
  45 Hz to 1 kHz0.0312E-06   
  1 to 5 kHz0.0622E-06   
  5 to 10 kHz0.1552E-06   
  10 to 30 kHz0.3103E-06   
        
 33 to 330 mA10 to 20 Hz0.1402E-05   
  20 to 45 Hz0.0702E-05   
  45 Hz to 1 kHz0.0312E-05   
  1 to 5 kHz0.0784E-05   
  5 to 10 kHz0.1558E-05   
  10 to 30 kHz0.3102E-04   
        
 330 mA to 1.1 A10 to 45 Hz0.1408E-05   
  45 Hz to 1 kHz0.0398E-05   
  1 to 5 kHz0.4658E-04   
  5 to 10 kHz1.9384E-03   
        
 1.1 A to 3.0 A10 to 45 Hz0.1408E-05   
  45 Hz to 1 kHz0.0478E-05   
  1 to 5 kHz0.4658E-04   
  5 to 10 kHz1.9384E-03   
        
 3.0 A to 11 A45 Hz to 100 Hz0.0472E-03   
  100 Hz to 1 kHz0.0782E-03   
  1 to 5 kHz2.3262E-03   
        
 11 A to 20.5 A45 Hz to 100 Hz0.0934E-03   
  100 Hz to 1 kHz0.1164E-03   
  1 to 5 kHz2.3264E-03   
        
        
1.0.6CAPACITANCE Tol(%)Floor   
        
 220 pF to 400 pF 0.3888E-12   
 0.4 to 1.1 nF 0.3888E-12   
 1.1 nF to 3.3 nF 0.3888E-12   
 3.3 nF to 11 nF 0.1948E-12   
 11 to 33 nF 0.1948E-11   
 33 to 110 nF 0.1948E-11   
 110 to 330 nF 0.1942E-10   
 330 to 1.1 µF 0.1948E-10   
 1.1 to 3.3  µF 0.1942E-09   
 3.3 to 11  µF 0.1948E-09   
 11 to 33 µF 0.3102E-08   
 33 to 110 µF 0.3498E-08   
 110 to 330  µF 0.3492E-07   
 330  µF to 1.1 mF 0.3498E-07   
 1.1 to 3.3 mF 0.3492E-06   
 3.3 to 11 mF 0.3498E-06   
 11 to 33 mF 0.5812E-05   
 33 to 110 mF 0.8538E-05   
        
1.0.7FREQUENCY Tol(%)Floor   
        
 0.01 to 119.99 Hz 0.0027.8E-04   
 120 to 1200 Hz 7.8E-04   
 1.2 to 12 kHz 7.8E-04   
 12 to 120 kHz 1.2E-02   
 120 to 1200 kHz 1.2E-02   
 1.2 to 2 MHz 1.2E-02   
        
1.0.8DC POWER  % of Watts Output    
 33 mV to 1020 V3.3 to 329.99 mA0.05    
  0.33 to 11 A0.11    
  11 to 20 A0.2    
        
        
1.0.9AC Power  % of Watts Output    
 33 mV to 1020 V3.3 to 329.99 mA0.31    
 45 Hz to 65 Hz0.33 to 11 A0.27    
  11 to 20 A0.27    
        
        
1.0.10Phase Angle ∆Φ degrees    
 33 mV to 1020 V10 to 65 Hz0.2    
  65 to 500 Hz0.8    
  500 to 1kHz1.6    
  1 kHz to 5 kHz5    
  5 kHz to 10 kHz9    
        
1.1Graphic Recording & Digital storage Recorders      
 With least uncertainties as per 1.0      
        
1.2Calibrators and Standards 
 MEASUREMENT FUNCTION WITH LEAST UNCERTAINTIES OF MEASUREMENT     
1.2.1DC VOLTAGE      
 0.1 V ±1.04 µV    
 1 V ±6.00 µV    
 10 V ±50.0 µV    
 100 V ±0.8 mV    
 1000 V ±8.0 mV    
        
1.2.2Ohms      
 10  ±0.25 mΩ    
 100  ±2.10 mΩ    
 1 k ±0.015 Ω    
 10 k ±0.15 Ω    
 100 k ±1.5 Ω    
 1 M ±24.0 Ω    
 10 M ±0.74 kΩ    
 100 M ±0.06 MΩ    
        
1.2.3DC CURRENT      
 100 µA ±2.0 nA    
 1 mA ±13.0 nA    
 10 mA ±0.13 µA    
 100 mA ±1.8 µA    
 1 A ±0.03 mA    
        
1.2.4AC CURRENTFREQUENCY     
 100 µA1 kHz±0.02 µA    
 1 mA1 kHz±0.20 µA    
 10 mA1 kHz±2.0 µA    
 100 mA1 kHz±20.0 µA    
 1 A1 kHz±0.30 mA    
        
1.2.5AC VOLTAGEFREQUENCY     
 0.01 V1 kHz±5.0 µV    
 0.01 V20 kHz±5.0 µV    
 0.01 V100 kHz±8.0 µV    
 0.01 V300 kHz±16.0 µV    
 0.01 V1 MHz±0.03 mV    
 0.01 V4 MHz±3.10 mV    
 0.1 V1 kHz±0.03 mV    
 0.1 V20 kHz±0.03 mV    
 0.1 V100 kHz±0.06 mV    
 0.1 V300 kHz±0.10 mV    
 0.1 V1 MHz±0.3 mV    
 0.1 V4 MHz±0.41 mV    
 0.1 V8 MHz±0.41 mV    
 0.1 V10 MHz±0.47 mV    
 1 V1 kHz±0.3 mV    
 1 V20 kHz±0.3 mV    
 1 V50 kHz±0.3 mV    
 1 V100 kHz±0.2 mV    
 1 V300 kHz±0.5 mV    
 1 V500 kHz±1.1 mV    
 1 V1 MHz±1.9 mV    
 1 V4 MHz±4.1 mV    
 1 V8 MHz±4.1 mV    
 1 V10 MHz±4.7 mV    
 10 V10 Hz to 50 kHz±3.0 mV    
 10 V100 kHz±1.0 mV    
 10 V300 kHz±3.0 mV    
 10 V500 kHz±11.0 mV    
 10 V1 MHz±17.0 mV    
 10 V2 MHz±0.127 V    
 10 V4 MHz±0.127 V    
 10 V8 MHz±0.128 V    
 10 V10 MHz±0.46 V    
 100 V1 kHz±30.0 mV    
 100 V20 kHz±30.0 mV    
 100 V50 kHz±30.0 mV    
 100 V100 kHz±20.0 mV    
 1000 V1 kHz±0.1 V    
        
1.2.6FREQUENCY      
 1 Hz ±5 x 10-6    
 10 MHz ±50 x 10-8    
        
1.2.7CAPACITANCE      
 ≤ 100 µF ±0.2%    
 100 µF ±1%    

SCOPE 17025

INDEXCLASSSUBCLASSCAPABILITY / UNCERTAINTYProcedure #’s
2.1TEMPERATURERadiation pyrometerscalibration of infrared thermometers,
with a spectral response range of 6.5 to 18µm, and a preset emissivity of 0.95,
with least uncertainty of measurement of –  ±1.8°C from 0°C to 300°C
HKC030
2.2TEMPERATUREDigital temperature indicator systemswith least uncertainties of measurement of –
using thermocouple sensor , ±0.23°C from -50°C to 250°C,
using metallic resistance sensor, ±0.16°C from -50°C to 250°C,
HKC063
2.3TEMPERATUREAncillary temperature measuring instruments – Indicators, recorders and controllerswith least uncertainties of measurement of –
for thermocouple temperature indicators,
±0.3°C from -100°C to 1000°C,
for metallic resistance thermometer indicators,
±0.06°C from -200°C to 260°C,
±0.1°C from 260°C to 630°C,
±0.2°C from 630°C to 800°C,
HKC001, HKC001A
2.4TEMPERATUREDry block calibratorswith least uncertainty of measurement of –
±0.2°C from -50°C to 250°C
HKC063
2.5TEMPERATURECalibration of humidity measuring deviceswith least uncertainty of measurement of –
±3% RH from 10% to 90% RH
TBD
     
3.1DIMENSIONALPlain plug gaugeswith least uncertainties of measurement of –
±0.003mm from 0mm to 25mm,
±0.03mm from 25mm to 300mm,
HKC012, HKC034,
3.2DIMENSIONALExternal micrometerswith least uncertainties of measurement of –
±0.0008mm from 0mm to 25mm,
±0.0012mm from 25mm to 75mm,
±0.0016mm from 75mm to 100mm
±0.006mm from 100mm to 250mm
HKC007,HKC008
3.3DIMENSIONALElectronic indicators, dial gauges and test indicatorswith least uncertainty of measurement of –
±0.0008mm from 0mm to 25mm
HKC007,HKC008
3.4DIMENSIONALElectronic and vernier calliperswith least uncertainties of measurement of –
±0.0008mm from 0mm to 25mm,
±0.0012mm from 25mm to 75mm,
±0.0016mm from 75mm to 100mm
±0.006mm from 100mm to 250mm
HKC007,HKC008
3.5DIMENSIONALFeeler gaugeswith least uncertainty of measurement of –
±0.003mm from 0mm to 25mm
HKC034,
3.6DIMENSIONALGauge blocks and accessorieswith least uncertainties of measurement of –
±0.003mm from 0mm to 25mm,
±0.03mm from 25mm to 300mm,
HKC012, HKC034,
3.7DIMENSIONALLength bars and accessorieswith least uncertainties of measurement of –
±0.003mm from 0mm to 25mm,
±0.03mm from 25mm to 300mm,
HKC012, HKC034,
3.8DIMENSIONALPrecision graticuleswith least uncertainty of measurement of –
±(3 µm + 3L/1000), L: mm, from 0mm to 150mm
STANDARD SCALE
3.9DIMENSIONALPrecision linear scaleswith least uncertainty of measurement of –
for transparent linear scales,
±(3 µm + 3L/1000), L: mm, from 0mm to 150mm
STANDARD SCALE
     
4.1TORQUETorque wrencheswith least uncertainties of measurement of –
±0.5% from 0N·m to 2N·m,
±0.4% from 2N·m to 40N·m,
±0.2% from 40N·m to 400N·m,
±0.2% from 400N·m to 1500N·m,
HKC035, HKC035A, HKC037, HKC077, HKC077A
     
5.1PRESSUREPressure gaugeswith least uncertainties of measurement of –
±0.02 kPa from 0 kPa to 200 kPa
±1.2 kPa from 200 kPa to 10000 kPa,
±5 kPa from 10000 kPa to 60000 kPa,
±120 kPa from 60000 kPa to 100000 kPa
HKC038, HKC039, HKC039A, HKC100
5.2PRESSUREVacuum gaugeswith least uncertainty of measurement of –
±0.02 kPa from 0 kPa abs. to 110 kPa abs.
HKC038, HKC068,
5.3PRESSUREPressure transducerswith least uncertainties of measurement of –
±0.02 kPa from 0 kPa to 200 kPa
±1.2 kPa from 200 kPa to 10000 kPa,
±5 kPa from 10000 kPa to 60000 kPa,
±120 kPa from 60000 kPa to 100000 kPa
HKC038, HKC039, HKC039A, HKC100
     
6.1FLOWGas meterswith least uncertainties of measurement of –
Air
±1.6% of F.S. from 0 Std mL/min to 300 Std mL/min,
±1.6% of F.S. from 0 Std L/min to 30 Std L/min,
±2.1% of reading or 0.05 Std L/min, whichever is greater, from 0 Std L/min to 300 Std L/min
 
6.2FLOWLiquid meterswith least uncertainty of measurement of –
Water, total volume of,
±1 L from 0 L to 400 L
HKC036
     
7.1ACOUSTICSound level meterswith least uncertainty of measurement of –
±0.12 dB at 94 dB & 114 dB
HKC016
     
8.1FREQUENCY AND TIMETachometerswith least uncertainty of measurement of –
(±0.001% ± 1 digit) from 0 RPM to 60000 RPM
HKC015
     
9.1MASSmass standardswith least uncertainty of measurement of –
±0.2 mg from 5 mg to 220 g
HKC009
9.2MASSPrecision laboratory balanceswith least uncertainty of measurement of –
±0.1 mg from 5 mg to 220 g
HKC009
9.3MASSIndustrial balanceswith least uncertainty of measurement of –
±3 g up to 70 kg
HKC010
     
10.1FORCELoad cellswith least uncertainties of measurement of –
±10 N from 0 to 50 kN,
±25 N up to 500 kN,
HKC055, HKC060

 

Definitions and metrology concepts taken into account when we perform our measurements:-

1: Measurement

– process of experimentally obtaining one or more quantity values that can reasonably be attributed to a quantity

2: Metrology

– science of measurement and its application

3: Measurand

– quantity intended to be measured

4: Measurement principle

– principle of measurement
– phenomenon serving as a basis of a measurement

5: Measurement method

– method of measurement

6: Measurement procedure

– detailed description of a measurement according to one or more measurement principles and to a given measurement method, based on a measurement model and including any calculation to obtain a measurement result

7: Reference measurement procedure

– measurement procedure accepted as providing measurement results fit for their intended use in assessing measurement trueness of measured quantity values obtained from other measurement procedures for quantities of the same kind, in calibration, or in characterizing reference materials

8: Primary reference measurement

– procedure
– primary reference procedure
– reference measurement procedure used to obtain a measurement result without relation to a measurement standard for a quantity of the same kind

9: Measurement result result of measurement

– set of quantity values being attributed to a measurand together with any other available relevant information

10: Measured quantity value

– value of a measured quantity
– measured value
– quantity value representing a measurement result

11: True quantity value

– true value of a quantity
– true value
– quantity value consistent with the definition of a quantity

12: Conventional quantity value

– conventional value of a quantity
– conventional value
– quantity value attributed by agreement to a quantity for a given purpose

13: Measurement accuracy

– accuracy of measurement
– accuracy
– closeness of agreement between a measured quantity value and a true quantity value of a measurand

14: Measurement trueness

– trueness of measurement
– trueness
– closeness of agreement between the average of an infinite number of replicate measured quantity values and a reference quantity value

15: Measurement precision

– precision
– closeness of agreement between indications or measured quantity values obtained by replicate measurements on the same or similar objects under specified conditions

16: Measurement error

– error of measurement
– error
– measured quantity value minus a reference quantity value

17: Systematic measurement error

– systematic error of measurement
– systematic error
– component of measurement error that in replicate measurements remains constant or varies in a predictable manner

18: Measurement bias

– bias
– estimate of a systematic measurement error

19: Random measurement error

– random error of measurement
– random error
– component of measurement error that in replicate
– measurements varies in an unpredictable manner

20: Repeatability condition of measurement

– repeatability condition
– condition of measurement, out of a set of conditions that includes the same measurement procedure, same operators, same measuring system, same operating conditions and same location, and replicate measurements on the same or similar objects over a short period of time

21: Measurement repeatability

– repeatability
– measurement precision under a set of repeatability conditions of measurement

22: Intermediate precision condition of

– measurement
– intermediate precision condition
– condition of measurement, out of a set of conditions that includes the same measurement procedure, same location, and replicate measurements on the same or similar objects over an extended period of time, but may include other conditions involving changes

23: Intermediate precision condition of

– measurement
– intermediate precision condition
– condition of measurement, out of a set of conditions that includes the same measurement procedure, same location, and replicate measurements on the same or similar objects over an extended period of time, but may include other conditions involving changes

24: Intermediate precision condition of

– measurement
– intermediate precision condition
– condition of measurement, out of a set of conditions that includes the same measurement procedure, same location, and replicate measurements on the same or similar objects over an extended period of time, but may include other conditions involving changes

25: Reproducibility condition of measurement

– reproducibility condition
– condition of measurement, out of a set of conditions that includes different locations, operators, measuring systems, and replicate measurements on the same or similar objects

26: Measurement reproducibility

– reproducibility
– measurement precision under reproducibility conditions of measurement

27: Measurement uncertainty

– uncertainty of measurement
– uncertainty
– non-negative parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used

28: Definitional uncertainty

– component of measurement uncertainty resulting from the finite amount of detail in the definition of a measurand

29: Type A evaluation of measurement

– uncertainty
– Type A evaluation
– evaluation of a component of measurement uncertainty by a statistical analysis of measured quantity values obtained under defined measurement conditions

30: Type B evaluation of measurement

– uncertainty
– Type B evaluation
– evaluation of a component of measurement uncertainty determined by means other than a Type A evaluation of measurement uncertainty

31: Standard measurement uncertainty

– standard uncertainty of measurement
– standard uncertainty
– measurement uncertainty expressed as a standard deviation

32: Combined standard measurement

– uncertainty
– combined standard uncertainty
– standard measurement uncertainty that is obtained using the individual standard measurement uncertainties associated with the input quantities in a measurement model

33: Relative standard measurement

– uncertainty
– standard measurement uncertainty divided by the absolute value of the measured quantity value

34: Uncertainty budget

– statement of a measurement uncertainty, of the components of that measurement uncertainty, and of their calculation and combination

35: Expanded measurement uncertainty

– expanded uncertainty
– product of a combined standard measurement uncertainty and a factor larger than the number one

36: Coverage interval

– interval containing the set of true quantity values of a measurand with a stated probability, based on the information available

37: coverage probability

– probability that the set of true quantity values of a measurand is contained within a specified coverage interval

38: coverage factor

– number larger than one by which a combined standard measurement uncertainty is multiplied to obtain an expanded measurement uncertainty

39: Calibration

– operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication

40: Calibration hierarchy

– sequence of calibrations from a reference to the final measuring system, where the outcome of each calibration depends on the outcome of the previous calibration

41: Metrological traceability

– property of a measurement result whereby the result can be related to a reference through a documented unbroken chain of calibrations, each contributing to the measurement uncertainty

42: Traceability

– The abbreviated term “traceability” is sometimes used to mean metrological traceability as well as other concepts, such as ‘sample traceability’ or ‘document traceability’ or ‘instrument traceability’ or ‘material traceability’, where the history (“trace”) of an item is meant. Therefore, the full term of “metrological traceability” is preferred if there is any risk of confusion.

43: The ILAC considers the elements for confirming metrological traceability to be an unbroken metrological traceability chain to an international measurement standard or a national measurement standard, a documented measurement uncertainty, a documented measurement procedure, technical competence, metrological traceability to the SI, and calibration intervals

44: Metrological traceability chain

– traceability chain
– sequence of measurement standards and calibrations that is used to relate a measurement result to a reference

45: Metrological traceability to

– a measurement unit
– metrological traceability to a unit
– metrological traceability where the reference is the definition of a measurement unit through its practical realization

46: Verification

– provision of objective evidence that a given item fulfills specified requirements

47: Validation

– verification, where the specified requirements are adequate for an intended use

48: Metrological comparability of

– measurement results
– metrological comparability
– comparability of measurement results, for quantities of a given kind, that are metrologically traceable to the same reference

49: Metrological compatibility of

– measurement results
– metrological compatibility
– property of a set of measurement results for a specified measurand, such that the absolute value of the difference of any pair of measured quantity values from two different measurement results is smaller than some chosen multiple of the standard measurement uncertainty of that difference

50: Measurement model

– model of measurement
– model
– mathematical relation among all quantities known to be involved in a measurement