{ "name": "Accuracy classes and maximum permissible errors for trade measuring instruments (EU MID)", "description": "Accuracy classes and maximum permissible errors that Directive 2014/32/EU (the Measuring Instruments Directive) assigns to instruments used for trade in the EU. Each record is one instrument type at one accuracy class under one measurement condition, with the permitted error the directive states. Covers the ten instrument-specific annexes: water meters (MI-001), gas meters and volume conversion devices (MI-002), active electrical energy meters (MI-003), thermal energy meters (MI-004), measuring systems for liquids other than water including fuel dispensers and road tankers (MI-005), automatic weighing instruments (MI-006), taximeters (MI-007), material measures (MI-008), dimensional measuring instruments (MI-009) and exhaust gas analysers (MI-010). Answers 'what is the maximum permissible error for a water meter', 'what accuracy class does a petrol pump have to be', 'MID accuracy class for a taximeter', 'allowed error on a weighbridge', 'thermal energy meter accuracy class 2 MPE' and 'is my fuel dispenser within tolerance'. The values are condition-dependent -- the error allowed at low flow differs from the error allowed at high flow, and in-service limits differ from new-instrument limits -- so a single percentage figure is almost always the wrong answer. A deliberate mirror: there is one original, but the numbers sit in ten annexes of a 300,000-character legal text with no per-instrument row structure, and search engines currently answer this question from document-sharing sites and equipment vendors rather than from the directive.", "url": "https://referencesource.org/legal-metrology-accuracy-classes/", "licence": "EU legislation reused under Commission Decision 2011/833/EU on the reuse of documents from the EU institutions. legislation.gov.uk content is Open Government Licence v3.0. Note the single-database volume advisory: one publisher supplies every record here, which is the EU/UK database right question -- mitigated by the source being legislation published under an explicit reuse decision.", "last_verified": "2026-08-05", "stale_after": "2027-08-05", "sources": [ "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032" ], "records": [ { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "1.0", "measurement_condition": "After durability test", "maximum_permissible_error": "Variation not exceeding one-third of MPE", "scope_note": "MI-002. Class 1.0 durability test variation.", "id": "after-durability-test-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/after-durability-test-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The variation of the measurement result after the durability test when compared with the initial measurement result shall not exceed one-third of the MPE in point 2.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "After durability test, lower zone (Q1 to Q2)", "maximum_permissible_error": "Variation not exceeding 3 % of metered volume", "scope_note": "MI-001. Durability test variation, lower zone.", "id": "after-durability-test-lower-zone-q1-to-q2-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/after-durability-test-lower-zone-q1-to-q2-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "3 % of the metered volume between Q 1 included and Q 2 excluded;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "After durability test, upper zone (Q2 to Q4)", "maximum_permissible_error": "Variation not exceeding 1.5 % of metered volume", "scope_note": "MI-001. Durability test variation, upper zone.", "id": "after-durability-test-upper-zone-q2-to-q4-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/after-durability-test-upper-zone-q2-to-q4-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "1,5 % of the metered volume between Q 2 included and Q 4 included.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "1.5", "measurement_condition": "After durability test, upper zone (Qt to Qmax)", "maximum_permissible_error": "Variation not exceeding 2 %", "scope_note": "MI-002. Class 1.5 durability test variation.", "id": "after-durability-test-upper-zone-qt-to-qmax-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/after-durability-test-upper-zone-qt-to-qmax-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The variation of the measurement result after the durability test when compared with the initial measurement result for the flow rates in the range Q t to Q max - shall not exceed the measurement result by more than 2 %.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (aircraft refuelling)", "annex": "VII", "accuracy_class": "0.5", "measurement_condition": "Aircraft refuelling systems", "maximum_permissible_error": "0.5 %", "scope_note": "MI-005. Accuracy class for aircraft refuelling.", "id": "aircraft-refuelling-systems-vii-liquid-measuring-system-aircraft-refuelling", "url": "https://referencesource.org/legal-metrology-accuracy-classes/aircraft-refuelling-systems-vii-liquid-measuring-system-aircraft-refuelling/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "measuring systems for refuelling aircraft", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Automatic catchweigher", "annex": "VIII", "accuracy_class": "XI, XII, XIII, XIIII / Y(I), Y(II), Y(a), Y(b)", "measurement_condition": "All loads, automatic operation", "maximum_permissible_error": "Per Tables 1-4", "scope_note": "MI-006. Eight accuracy classes for catchweighers.", "id": "all-loads-automatic-operation-viii-automatic-catchweigher", "url": "https://referencesource.org/legal-metrology-accuracy-classes/all-loads-automatic-operation-viii-automatic-catchweigher/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "These primary categories are further divided into four accuracy classes:", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meters and volume conversion devices \u2014 volume conversion device", "annex": "Annex IV (MI-002)", "measurement_condition": "ambient temperature 20 \u00b0C \u00b1 3 \u00b0C, ambient humidity 60 % \u00b1 15 %, nominal values for power supply", "maximum_permissible_error": "\u00b1 0,5 %", "id": "ambient-temperature-20-c-3-c-ambient-humidity-60-15-nominal-values-for-power-sup-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device", "url": "https://referencesource.org/legal-metrology-accuracy-classes/ambient-temperature-20-c-3-c-ambient-humidity-60-15-nominal-values-for-power-sup-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "0,5 % at ambient temperature 20 \u00b0C \u00b1 3 \u00b0C, ambient humidity 60 % \u00b1 15 %, nominal values for power supply;", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Dimensional measuring instruments \u2014 area measuring instruments", "annex": "Annex XI (MI-009)", "maximum_permissible_error": "\u00b1 1,0 %, but not less than 1 dm\u00b2", "id": "annex-xi-mi-009-dimensional-measuring-instruments-area-measuring-instruments", "url": "https://referencesource.org/legal-metrology-accuracy-classes/annex-xi-mi-009-dimensional-measuring-instruments-area-measuring-instruments/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE is 1,0 %, but not less than 1 dm 2 ." }, { "instrument_type": "Dimensional measuring instruments \u2014 multidimensional measuring instruments", "annex": "Annex XI (MI-009)", "maximum_permissible_error": "\u00b1 1,0 d", "scope_note": "d is the scale interval", "id": "annex-xi-mi-009-dimensional-measuring-instruments-multidimensional-measuring-instruments", "url": "https://referencesource.org/legal-metrology-accuracy-classes/annex-xi-mi-009-dimensional-measuring-instruments-multidimensional-measuring-instruments/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE is \u00b1 1,0 d.", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "scope_note" ] }, { "instrument_type": "Area measuring instrument", "annex": "XI", "accuracy_class": "N/A (single class)", "measurement_condition": "Area of irregular shaped objects (e.g. leather)", "maximum_permissible_error": "1.0 %, but not less than 1 dm2", "scope_note": "MI-009. Area measuring instrument MPE.", "id": "area-of-irregular-shaped-objects-e-g-leather-xi-area-measuring-instrument", "url": "https://referencesource.org/legal-metrology-accuracy-classes/area-of-irregular-shaped-objects-e-g-leather-xi-area-measuring-instrument/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE is 1,0 %, but not less than 1 dm 2 .", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Material measures of length", "annex": "Annex X (MI-008)", "accuracy_class": "I", "measurement_condition": "between two non-consecutive scale marks", "maximum_permissible_error": "\u00b1 (0,1 + 0,1 L) mm, where L is length rounded up to next whole metre; c = 0,1 mm for terminal interval bounded by a surface", "id": "between-two-non-consecutive-scale-marks-annex-x-mi-008-material-measures-of-length", "url": "https://referencesource.org/legal-metrology-accuracy-classes/between-two-non-consecutive-scale-marks-annex-x-mi-008-material-measures-of-length/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "ANNEX X MATERIAL MEASURES (MI-008) CHAPTER I Material measures of length The relevant essential requirements of Annex I, the specific requirements of this Annex and the conformity assessment procedures listed in this chapter, apply to material measures of length defined below. However, the requirement for the supply of a copy of declarations of conformity may be interpreted as applying to a batch or consignment rather than each individual instrument. DEFINITIONS Material measure of length | An instrument comprising scale marks whose distances are given in legal units of length. | SPECIFIC REQUIREMENTS Reference Conditions 1.1. | For tapes of length equal to or greater than 5 metres, the maximum permissible errors (MPEs) are to be met when a tractive force of fifty newtons or other force values as specified by the manufacturer and marked on the tape accordingly, or in the case of rigid or semi-rigid measures no tractive force is needed, is applied. | 1.2. | The reference temperature is 20 \u00b0C unless otherwise specified by the manufacturer and marked on the measure accordingly. | MPEs 2. | The MPE, positive or negative in mm, between two non-consecutive scale marks is (a + bL), where:", "verified_fields": [ "accuracy_class", "instrument_type" ], "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Material measure of length", "annex": "X", "accuracy_class": "I, II, III, D, S", "measurement_condition": "Between two non-consecutive scale marks", "maximum_permissible_error": "Formula (a + bL) mm; class-dependent a and b values", "scope_note": "MI-008. Length measure MPE formula.", "id": "between-two-non-consecutive-scale-marks-x-material-measure-of-length", "url": "https://referencesource.org/legal-metrology-accuracy-classes/between-two-non-consecutive-scale-marks-x-material-measure-of-length/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE, positive or negative in mm, between two non-consecutive scale marks is (a + bL), where:", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeters", "annex": "Annex IX (MI-007)", "measurement_condition": "calculation of the fare", "maximum_permissible_error": "\u00b1 0,1 %, minimum including rounding: corresponding to the least significant digit of the fare indication", "scope_note": "excluding any errors due to application of the taximeter in a taxi", "id": "calculation-of-the-fare-annex-ix-mi-007-taximeters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/calculation-of-the-fare-annex-ix-mi-007-taximeters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the calculation of the fare: \u00b1 0,1 % minimum, including rounding: corresponding to the least significant digit of the fare indication.", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Thermal energy meters \u2014 calculator", "annex": "Annex VI (MI-004)", "measurement_condition": "calculator sub-assembly", "maximum_permissible_error": "E c = \u00b1 (0,5 + \u0394\u03b8min/\u0394\u03b8)", "id": "calculator-sub-assembly-annex-vi-mi-004-thermal-energy-meters-calculator", "url": "https://referencesource.org/legal-metrology-accuracy-classes/calculator-sub-assembly-annex-vi-mi-004-thermal-energy-meters-calculator/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The relative MPE of the calculator, expressed in %:", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Exhaust gas analysers", "annex": "Annex XII (MI-010)", "accuracy_class": "0", "measurement_condition": "CO fraction", "maximum_permissible_error": "\u00b1 0,03 % vol or \u00b1 5 %, whichever is greater", "id": "co-fraction-annex-xii-mi-010-exhaust-gas-analysers", "url": "https://referencesource.org/legal-metrology-accuracy-classes/co-fraction-annex-xii-mi-010-exhaust-gas-analysers/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1. Table 1 Classes and measuring ranges | Parameter | Classes 0 and I | CO fraction |", "verified_fields": [ "accuracy_class", "instrument_type" ], "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0", "measurement_condition": "CO fraction", "maximum_permissible_error": "+/- 0.03 % vol or +/- 5 %, whichever is greater", "scope_note": "MI-010. Class 0 CO fraction MPE.", "id": "co-fraction-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/co-fraction-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 0,03 % vol", "verified_fields": [ "accuracy_class" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0 and I", "measurement_condition": "CO2 fraction", "maximum_permissible_error": "+/- 0.5 % vol or +/- 5 %, whichever is greater", "scope_note": "MI-010. CO2 fraction MPE.", "id": "co2-fraction-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/co2-fraction-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 0,5 % vol", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Thermal energy meter", "annex": "VI", "accuracy_class": "1, 2, 3", "measurement_condition": "Complete instrument, rated operating conditions", "maximum_permissible_error": "Class-dependent formula", "scope_note": "MI-004. Three accuracy classes.", "id": "complete-instrument-rated-operating-conditions-vi-thermal-energy-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/complete-instrument-rated-operating-conditions-vi-thermal-energy-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The following accuracy classes are defined for thermal energy meters: 1, 2, 3.", "verified_fields": [ "accuracy_class", "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Thermal energy meter", "annex": "VI", "accuracy_class": "1, 2, 3", "measurement_condition": "Complete instrument", "maximum_permissible_error": "Formula-based per class (Ef + Et + Ec)", "scope_note": "MI-004. MPE as percentage of true value.", "id": "complete-instrument-vi-thermal-energy-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/complete-instrument-vi-thermal-energy-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The maximum permissible relative errors applicable to a complete thermal energy meter, expressed in percent of the true value for each accuracy class, are:", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Thermal energy meters", "annex": "Annex VI (MI-004)", "accuracy_class": "1", "measurement_condition": "complete thermal energy meter", "maximum_permissible_error": "E = \u00b1 (2 + 4 \u0394\u03b8min/\u0394\u03b8 + 0,01 qp/q)", "scope_note": "E f , E t , E c according to points 7.1 to 7.3", "id": "complete-thermal-energy-meter-annex-vi-mi-004-thermal-energy-meters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/complete-thermal-energy-meter-annex-vi-mi-004-thermal-energy-meters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "MPEs applicable to complete thermal energy meters The maximum permissible relative errors applicable to a complete thermal energy meter, expressed in percent of the true value for each accuracy class, are: \u2014 | For class 1: , with E f , E t , E c according to points 7.1 to 7.3.", "verified_fields": [ "accuracy_class", "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (cryogenic)", "annex": "VII", "accuracy_class": "2.5", "measurement_condition": "Cryogenic liquids (temperature below -153 degrees C)", "maximum_permissible_error": "2.5 %", "scope_note": "MI-005. Accuracy class for cryogenic systems.", "id": "cryogenic-liquids-temperature-below-153-degrees-c-vii-liquid-measuring-system-cryogenic", "url": "https://referencesource.org/legal-metrology-accuracy-classes/cryogenic-liquids-temperature-below-153-degrees-c-vii-liquid-measuring-system-cryogenic/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "measuring systems for cryogenic liquids (temperature below \u2013 153 \u00b0C)", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Active electrical energy meter", "annex": "V", "accuracy_class": "A, B, C", "measurement_condition": "Different temperature ranges", "maximum_permissible_error": "Per Table 2, relevant range applies", "scope_note": "MI-003. Temperature range selection.", "id": "different-temperature-ranges-v-active-electrical-energy-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/different-temperature-ranges-v-active-electrical-energy-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "When a meter operates in different temperature ranges the relevant MPE values shall apply.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeters", "annex": "Annex IX (MI-007)", "measurement_condition": "distance travelled", "maximum_permissible_error": "\u00b1 0,2 %, minimum value of mpe: 4 m", "scope_note": "excluding any errors due to application of the taximeter in a taxi", "id": "distance-travelled-annex-ix-mi-007-taximeters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/distance-travelled-annex-ix-mi-007-taximeters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the distance travelled: \u00b1 0,2 % minimum value of mpe: 4 m;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeter", "annex": "IX", "accuracy_class": "N/A (single class)", "measurement_condition": "Distance travelled measurement", "maximum_permissible_error": "+/- 0.2 %, minimum value 4 m", "scope_note": "MI-007. Taximeter distance MPE.", "id": "distance-travelled-measurement-ix-taximeter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/distance-travelled-measurement-ix-taximeter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the distance travelled: \u00b1 0,2 %", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0 and I", "measurement_condition": "Each fraction measured, rated operating conditions", "maximum_permissible_error": "Greater of absolute value or percentage of true value (per Table 2)", "scope_note": "MI-010. Greater-of rule for MPEs.", "id": "each-fraction-measured-rated-operating-conditions-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/each-fraction-measured-rated-operating-conditions-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For each of the fractions measured, the maximum error value permitted under rated operating conditions according to point 1.1 of Annex I is the greater of the two values shown in Table 2. Absolute values are expressed in % vol or ppm vol, percentage values are percent of the true value.", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Multidimensional measuring instrument", "annex": "XI", "accuracy_class": "N/A (single class)", "measurement_condition": "Edge length of smallest enclosing rectangular parallelepiped", "maximum_permissible_error": "+/- 1.0 d (scale interval)", "scope_note": "MI-009. Multidimensional measuring instrument MPE.", "id": "edge-length-of-smallest-enclosing-rectangular-parallelepiped-xi-multidimensional-measuring-instrument", "url": "https://referencesource.org/legal-metrology-accuracy-classes/edge-length-of-smallest-enclosing-rectangular-parallelepiped-xi-multidimensional-measuring-instrument/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE is \u00b1 1,0 d.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "1.5", "measurement_condition": "Error after durability test", "maximum_permissible_error": "Not exceeding twice the MPE in point 2", "scope_note": "MI-002. Class 1.5 error after durability.", "id": "error-after-durability-test-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/error-after-durability-test-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The error of indication after the durability test shall not exceed twice the MPE in point 2.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "Error after durability test, lower zone (Q1 to Q2)", "maximum_permissible_error": "+/- 6 % of metered volume", "scope_note": "MI-001. Error after durability, lower zone.", "id": "error-after-durability-test-lower-zone-q1-to-q2-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/error-after-durability-test-lower-zone-q1-to-q2-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 6 % of the metered volume between Q 1 included and Q 2 excluded;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "Error after durability test, upper zone (Q2 to Q4), cold water (0.1-30 degrees C)", "maximum_permissible_error": "+/- 2.5 % of metered volume", "scope_note": "MI-001. Error after durability, upper zone, cold water.", "id": "error-after-durability-test-upper-zone-q2-to-q4-cold-water-0-1-30-degrees-c-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/error-after-durability-test-upper-zone-q2-to-q4-cold-water-0-1-30-degrees-c-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 2,5 % of the metered volume between Q 2 included and Q 4 included for water meters intended to meter water with a temperature between 0,1 \u00b0C and 30 \u00b0C,", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "Error after durability test, upper zone (Q2 to Q4), hot water (30-90 degrees C)", "maximum_permissible_error": "+/- 3.5 % of metered volume", "scope_note": "MI-001. Error after durability, upper zone, hot water.", "id": "error-after-durability-test-upper-zone-q2-to-q4-hot-water-30-90-degrees-c-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/error-after-durability-test-upper-zone-q2-to-q4-hot-water-30-90-degrees-c-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 3,5 % of the metered volume between Q 2 included and Q 4 included for water meters intended to meter water with a temperature between 30 \u00b0C and 90 \u00b0C.", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeter", "annex": "IX", "accuracy_class": "N/A (single class)", "measurement_condition": "Fare calculation", "maximum_permissible_error": "+/- 0.1 %, minimum corresponding to least significant digit", "scope_note": "MI-007. Taximeter fare calculation MPE.", "id": "fare-calculation-ix-taximeter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/fare-calculation-ix-taximeter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the calculation of the fare: \u00b1 0,1 %", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Thermal energy meters \u2014 flow sensor", "annex": "Annex VI (MI-004)", "accuracy_class": "1", "measurement_condition": "flow sensor sub-assembly", "maximum_permissible_error": "E f = \u00b1 (1 + 0,01 qp/q), but not more than 5 %", "id": "flow-sensor-sub-assembly-annex-vi-mi-004-thermal-energy-meters-flow-sensor", "url": "https://referencesource.org/legal-metrology-accuracy-classes/flow-sensor-sub-assembly-annex-vi-mi-004-thermal-energy-meters-flow-sensor/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Class 1: , but not more than 5 %,", "verified_fields": [ "accuracy_class" ], "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Fuel dispenser (not liquefied gases)", "annex": "VII", "accuracy_class": "0.5", "measurement_condition": "Fuel dispensers for non-liquefied-gas fuels", "maximum_permissible_error": "0.5 %", "scope_note": "MI-005. Accuracy class for fuel dispensers.", "id": "fuel-dispensers-for-non-liquefied-gas-fuels-vii-fuel-dispenser-not-liquefied-gases", "url": "https://referencesource.org/legal-metrology-accuracy-classes/fuel-dispensers-for-non-liquefied-gas-fuels-vii-fuel-dispenser-not-liquefied-gases/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "fuel dispensers (not for liquefied gases),", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "N/A", "measurement_condition": "Gas meter with temperature conversion, 30 degrees C range", "maximum_permissible_error": "MPE increased by 0.5 %", "scope_note": "MI-002. Temperature conversion additional MPE.", "id": "gas-meter-with-temperature-conversion-30-degrees-c-range-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/gas-meter-with-temperature-conversion-30-degrees-c-range-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 \u00b0C extending symmetrically around the temperature specified by the manufacturer that lies between 15 \u00b0C and 25 \u00b0C. Outside this range, an additional increase of 0,5 % is permitted in each interval of 10 \u00b0C.", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analysers", "annex": "Annex XII (MI-010)", "accuracy_class": "0", "measurement_condition": "HC fraction", "maximum_permissible_error": "\u00b1 10 ppm vol or \u00b1 5 %, whichever is greater", "id": "hc-fraction-annex-xii-mi-010-exhaust-gas-analysers", "url": "https://referencesource.org/legal-metrology-accuracy-classes/hc-fraction-annex-xii-mi-010-exhaust-gas-analysers/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1. Table 1 Classes and measuring ranges | Parameter | Classes 0 and I | CO fraction | from 0 to 5 % vol | CO 2 fraction | from 0 to 16 % vol | HC fraction |", "verified_fields": [ "accuracy_class", "instrument_type" ], "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0", "measurement_condition": "HC fraction", "maximum_permissible_error": "+/- 10 ppm vol or +/- 5 %, whichever is greater", "scope_note": "MI-010. Class 0 HC fraction MPE.", "id": "hc-fraction-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/hc-fraction-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 10 ppm vol", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "N/A", "measurement_condition": "Lambda value calculation", "maximum_permissible_error": "0.3 %", "scope_note": "MI-010. Lambda calculation MPE.", "id": "lambda-value-calculation-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/lambda-value-calculation-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE on lambda calculation is 0,3 %.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (liquefied carbon dioxide)", "annex": "VII", "accuracy_class": "1.5", "measurement_condition": "Liquefied carbon dioxide", "maximum_permissible_error": "1.5 %", "scope_note": "MI-005. Accuracy class for liquefied CO2.", "id": "liquefied-carbon-dioxide-vii-liquid-measuring-system-liquefied-carbon-dioxide", "url": "https://referencesource.org/legal-metrology-accuracy-classes/liquefied-carbon-dioxide-vii-liquid-measuring-system-liquefied-carbon-dioxide/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Measuring systems for liquefied carbon dioxide", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (liquefied gases, >= -10 C)", "annex": "VII", "accuracy_class": "1.0", "measurement_condition": "Liquefied gases under pressure, temperature >= -10 degrees C", "maximum_permissible_error": "1.0 %", "scope_note": "MI-005. Accuracy class for liquefied gas systems.", "id": "liquefied-gases-under-pressure-temperature-10-degrees-c-vii-liquid-measuring-system-liquefied-gases-10-c", "url": "https://referencesource.org/legal-metrology-accuracy-classes/liquefied-gases-under-pressure-temperature-10-degrees-c-vii-liquid-measuring-system-liquefied-gases-10-c/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Measuring systems for liquefied gases under pressure measured at a temperature equal to or above \u2013 10 \u00b0C", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (liquefied gases, < -10 C)", "annex": "VII", "accuracy_class": "1.5", "measurement_condition": "Liquefied gases under pressure, temperature below -10 degrees C (not cryogenic)", "maximum_permissible_error": "1.5 %", "scope_note": "MI-005. Accuracy class for cold liquefied gas systems.", "id": "liquefied-gases-under-pressure-temperature-below-10-degrees-c-not-cryogenic-vii-liquid-measuring-system-liquefied-gases-10-c", "url": "https://referencesource.org/legal-metrology-accuracy-classes/liquefied-gases-under-pressure-temperature-below-10-degrees-c-not-cryogenic-vii-liquid-measuring-system-liquefied-gases-10-c/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Measuring systems for liquefied gases under pressure measured at a temperature below \u2013 10 \u00b0C (other than cryogenic liquids)", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "Lower zone (Q1 to Q2 excluded), any water temperature", "maximum_permissible_error": "5 %", "scope_note": "MI-001. Volume measurement, lower zone.", "id": "lower-zone-q1-to-q2-excluded-any-water-temperature-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/lower-zone-q1-to-q2-excluded-any-water-temperature-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE, positive or negative, on volumes delivered at flowrates between the minimum flowrate (Q 1 ) and the transitional flowrate (Q 2 ) (excluded) is 5 % for water having any temperature.", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "1.5", "measurement_condition": "Lower zone (Qmin to Qt), volume or mass at metering conditions", "maximum_permissible_error": "3 %", "scope_note": "MI-002. Class 1.5 gas meter, lower zone MPE.", "id": "lower-zone-qmin-to-qt-volume-or-mass-at-metering-conditions-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/lower-zone-qmin-to-qt-volume-or-mass-at-metering-conditions-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "2.1. Gas meter indicating the volume at metering conditions or mass", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Length measuring instrument (for rope-type materials)", "annex": "XI", "accuracy_class": "I", "measurement_condition": "Measurement of textiles, bands, cables, etc.", "maximum_permissible_error": "0.125 %, but not less than 0.005 Lm", "scope_note": "MI-009. Length measuring instrument Class I.", "id": "measurement-of-textiles-bands-cables-etc-xi-length-measuring-instrument-for-rope-type-materials", "url": "https://referencesource.org/legal-metrology-accuracy-classes/measurement-of-textiles-bands-cables-etc-xi-length-measuring-instrument-for-rope-type-materials/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "0,125 %, but not less than 0,005 L m", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (milk)", "annex": "VII", "accuracy_class": "0.5", "measurement_condition": "Milk measuring systems", "maximum_permissible_error": "0.5 %", "scope_note": "MI-005. Accuracy class for milk systems.", "id": "milk-measuring-systems-vii-liquid-measuring-system-milk", "url": "https://referencesource.org/legal-metrology-accuracy-classes/milk-measuring-systems-vii-liquid-measuring-system-milk/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "measuring systems for milk", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0 and I", "measurement_condition": "O2 fraction", "maximum_permissible_error": "+/- 0.1 % vol or +/- 5 %, whichever is greater", "scope_note": "MI-010. O2 fraction MPE.", "id": "o2-fraction-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/o2-fraction-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "\u00b1 0,1 % vol", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meters and volume conversion devices \u2014 volume conversion device", "annex": "Annex IV (MI-002)", "measurement_condition": "other conversion devices at rated operating conditions", "maximum_permissible_error": "\u00b1 1 %", "id": "other-conversion-devices-at-rated-operating-conditions-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device", "url": "https://referencesource.org/legal-metrology-accuracy-classes/other-conversion-devices-at-rated-operating-conditions-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "1 % for other conversion devices at rated operating conditions.", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Liquid measuring system (pipeline)", "annex": "VII", "accuracy_class": "0.3", "measurement_condition": "Pipeline measuring systems", "maximum_permissible_error": "0.3 %", "scope_note": "MI-005. Accuracy class for pipeline systems.", "id": "pipeline-measuring-systems-vii-liquid-measuring-system-pipeline", "url": "https://referencesource.org/legal-metrology-accuracy-classes/pipeline-measuring-systems-vii-liquid-measuring-system-pipeline/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Measuring systems on pipeline", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meters", "annex": "Annex III (MI-001)", "measurement_condition": "Q1 \u2264 Q < Q2", "maximum_permissible_error": "\u00b1 5 %", "id": "q1-q-q2-annex-iii-mi-001-water-meters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/q1-q-q2-annex-iii-mi-001-water-meters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPE, positive or negative, on volumes delivered at flowrates between the minimum flowrate (Q 1 ) and the transitional flowrate (Q 2 ) (excluded) is 5 % for water having any temperature.", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Water meters", "annex": "Annex III (MI-001)", "measurement_condition": "Q2 \u2264 Q \u2264 Q4, water temperature > 30 \u00b0C", "maximum_permissible_error": "\u00b1 3 %", "id": "q2-q-q4-water-temperature-30-c-annex-iii-mi-001-water-meters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/q2-q-q4-water-temperature-30-c-annex-iii-mi-001-water-meters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "3 % for water having a temperature > 30 \u00b0C.", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Liquid measuring system (other than water)", "annex": "VII", "accuracy_class": "0.3, 0.5, 1.0, 1.5, 2.5", "measurement_condition": "Quantities >= 2 litres, measuring systems", "maximum_permissible_error": "0.3 % to 2.5 % depending on accuracy class", "scope_note": "MI-005. Five accuracy classes for measuring systems and meters.", "id": "quantities-2-litres-measuring-systems-vii-liquid-measuring-system-other-than-water", "url": "https://referencesource.org/legal-metrology-accuracy-classes/quantities-2-litres-measuring-systems-vii-liquid-measuring-system-other-than-water/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "2.1. For quantities equal to or greater than 2 litres the MPE on indications is:", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Active electrical energy meter", "annex": "V", "accuracy_class": "A, B, C", "measurement_condition": "Rated operating conditions at varying load current", "maximum_permissible_error": "Per Table 2", "scope_note": "MI-003. MPEs per class, temperature range, and load.", "id": "rated-operating-conditions-at-varying-load-current-v-active-electrical-energy-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/rated-operating-conditions-at-varying-load-current-v-active-electrical-energy-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "MPEs in percent at rated operating conditions and defined load current levels and operating temperature", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Volume conversion device (other type)", "annex": "IV", "accuracy_class": "N/A", "measurement_condition": "Rated operating conditions", "maximum_permissible_error": "1 %", "scope_note": "MI-002. Other conversion device MPE.", "id": "rated-operating-conditions-iv-volume-conversion-device-other-type", "url": "https://referencesource.org/legal-metrology-accuracy-classes/rated-operating-conditions-iv-volume-conversion-device-other-type/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "1 % for other conversion devices at rated operating conditions.", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Volume conversion device (temperature type)", "annex": "IV", "accuracy_class": "N/A", "measurement_condition": "Rated operating conditions", "maximum_permissible_error": "0.7 %", "scope_note": "MI-002. Temperature conversion device MPE.", "id": "rated-operating-conditions-iv-volume-conversion-device-temperature-type", "url": "https://referencesource.org/legal-metrology-accuracy-classes/rated-operating-conditions-iv-volume-conversion-device-temperature-type/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "0,7 % for temperature conversion devices at rated operating conditions;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Active electrical energy meter", "annex": "V", "accuracy_class": "A, B, C", "measurement_condition": "Rated operating conditions", "maximum_permissible_error": "Class-dependent, per Table 2 of Annex V", "scope_note": "MI-003. Three class indices defined.", "id": "rated-operating-conditions-v-active-electrical-energy-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/rated-operating-conditions-v-active-electrical-energy-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The manufacturer shall specify the class index of the meter. The class indices are defined as: Class A, B and C.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Exhaust gas analyser", "annex": "XII", "accuracy_class": "0, I", "measurement_condition": "Rated operating conditions", "maximum_permissible_error": "Per Table 2 of Annex XII", "scope_note": "MI-010. Two classes defined.", "id": "rated-operating-conditions-xii-exhaust-gas-analyser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/rated-operating-conditions-xii-exhaust-gas-analyser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Two classes (0 and I) are being defined for exhaust gas analysers. The relevant minimum measuring ranges for these classes are shown in Table 1.", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeter", "annex": "IX", "accuracy_class": "N/A (single class)", "measurement_condition": "Real-time clock timekeeping", "maximum_permissible_error": "0.02 %", "scope_note": "MI-007. Taximeter clock accuracy.", "id": "real-time-clock-timekeeping-ix-taximeter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/real-time-clock-timekeeping-ix-taximeter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "the timekeeping shall have an accuracy of 0,02 %;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Volume conversion device", "annex": "IV", "accuracy_class": "N/A", "measurement_condition": "Reference conditions (20 degrees C +/- 3, 60% humidity +/- 15%)", "maximum_permissible_error": "0.5 %", "scope_note": "MI-002. Volume conversion device at reference conditions.", "id": "reference-conditions-20-degrees-c-3-60-humidity-15-iv-volume-conversion-device", "url": "https://referencesource.org/legal-metrology-accuracy-classes/reference-conditions-20-degrees-c-3-60-humidity-15-iv-volume-conversion-device/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "0,5 % at ambient temperature 20 \u00b0C \u00b1 3 \u00b0C, ambient humidity 60 % \u00b1 15 %, nominal values for power supply;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Liquid measuring system (road tankers, low viscosity)", "annex": "VII", "accuracy_class": "0.5", "measurement_condition": "Road tanker systems, liquids of low viscosity (< 20 mPa.s)", "maximum_permissible_error": "0.5 %", "scope_note": "MI-005. Accuracy class for road tanker systems.", "id": "road-tanker-systems-liquids-of-low-viscosity-20-mpa-s-vii-liquid-measuring-system-road-tankers-low-viscosity", "url": "https://referencesource.org/legal-metrology-accuracy-classes/road-tanker-systems-liquids-of-low-viscosity-20-mpa-s-vii-liquid-measuring-system-road-tankers-low-viscosity/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "measuring systems on road tankers for liquids of low viscosity (< 20 mPa.s)", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Automatic weighing instruments \u2014 automatic gravimetric filling instruments", "annex": "Annex VIII (MI-006)", "accuracy_class": "Ref(x)", "measurement_condition": "static loads", "maximum_permissible_error": "0,312 of the maximum permissible deviation of each fill from the average, as specified in Table 5, multiplied by the class designation factor (x)", "id": "static-loads-annex-viii-mi-006-automatic-weighing-instruments-automatic-gravimetric-filling-instruments", "url": "https://referencesource.org/legal-metrology-accuracy-classes/static-loads-annex-viii-mi-006-automatic-weighing-instruments-automatic-gravimetric-filling-instruments/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For static loads under rated operating conditions, the MPE for reference accuracy class Ref(x), shall be 0,312 of the maximum permissible deviation of each fill from the average; as specified in Table 5; multiplied by the class designation factor (x).", "verified_fields": [ "accuracy_class", "maximum_permissible_error" ], "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Automatic gravimetric filling instrument", "annex": "VIII", "accuracy_class": "Ref(x), X(x)", "measurement_condition": "Static loads, rated operating conditions", "maximum_permissible_error": "0.312 of max permissible deviation times factor (x)", "scope_note": "MI-006. Filling instrument static weighing error.", "id": "static-loads-rated-operating-conditions-viii-automatic-gravimetric-filling-instrument", "url": "https://referencesource.org/legal-metrology-accuracy-classes/static-loads-rated-operating-conditions-viii-automatic-gravimetric-filling-instrument/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For static loads under rated operating conditions, the MPE for reference accuracy class Ref(x), shall be 0,312 of the maximum permissible deviation of each fill from the average; as specified in Table 5; multiplied by the class designation factor (x).", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meters and volume conversion devices", "annex": "Annex IV (MI-002)", "accuracy_class": "1,5", "measurement_condition": "temperature conversion, 30 \u00b0C range around specified temperature", "maximum_permissible_error": "MPE increased by 0,5 %", "scope_note": "For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 \u00b0C extending symmetrically around the temperature specified by the manufacturer that lies between 15 \u00b0C and 25 \u00b0C.", "id": "temperature-conversion-30-c-range-around-specified-temperature-annex-iv-mi-002-gas-meters-and-volume-conversion-devices", "url": "https://referencesource.org/legal-metrology-accuracy-classes/temperature-conversion-30-c-range-around-specified-temperature-annex-iv-mi-002-gas-meters-and-volume-conversion-devices/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For a gas meter with temperature conversion, which only indicates the converted volume, the MPE of the meter is increased by 0,5 % in a range of 30 \u00b0C extending symmetrically around the temperature specified by the manufacturer that lies between 15 \u00b0C and 25 \u00b0C. Outside this range, an additional increase of 0,5 % is permitted in each interval of 10 \u00b0C.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meters and volume conversion devices \u2014 volume conversion device", "annex": "Annex IV (MI-002)", "measurement_condition": "temperature conversion devices at rated operating conditions", "maximum_permissible_error": "\u00b1 0,7 %", "id": "temperature-conversion-devices-at-rated-operating-conditions-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device", "url": "https://referencesource.org/legal-metrology-accuracy-classes/temperature-conversion-devices-at-rated-operating-conditions-annex-iv-mi-002-gas-meters-and-volume-conversion-devices-volume-conversion-device/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "0,7 % for temperature conversion devices at rated operating conditions;", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Thermal energy meters \u2014 temperature sensor pair", "annex": "Annex VI (MI-004)", "measurement_condition": "temperature sensor pair sub-assembly", "maximum_permissible_error": "E t = \u00b1 (0,5 + 3 \u0394\u03b8min/\u0394\u03b8)", "id": "temperature-sensor-pair-sub-assembly-annex-vi-mi-004-thermal-energy-meters-temperature-sensor-pair", "url": "https://referencesource.org/legal-metrology-accuracy-classes/temperature-sensor-pair-sub-assembly-annex-vi-mi-004-thermal-energy-meters-temperature-sensor-pair/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The relative MPE of the temperature sensor pair, expressed in %:", "derived_fields": [ "measurement_condition" ] }, { "instrument_type": "Taximeters", "annex": "Annex IX (MI-007)", "measurement_condition": "time elapsed", "maximum_permissible_error": "\u00b1 0,1 %, minimum value of mpe: 0,2 s", "scope_note": "excluding any errors due to application of the taximeter in a taxi", "id": "time-elapsed-annex-ix-mi-007-taximeters", "url": "https://referencesource.org/legal-metrology-accuracy-classes/time-elapsed-annex-ix-mi-007-taximeters/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the time elapsed: \u00b1 0,1 % minimum value of mpe: 0,2 s;", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Taximeter", "annex": "IX", "accuracy_class": "N/A (single class)", "measurement_condition": "Time elapsed measurement", "maximum_permissible_error": "+/- 0.1 %, minimum value 0.2 s", "scope_note": "MI-007. Taximeter time MPE.", "id": "time-elapsed-measurement-ix-taximeter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/time-elapsed-measurement-ix-taximeter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "For the time elapsed: \u00b1 0,1 %", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Continuous totaliser", "annex": "VIII", "accuracy_class": "0.5, 1, 2", "measurement_condition": "Totalised load", "maximum_permissible_error": "+/- 0.25 % to +/- 1.0 % depending on class", "scope_note": "MI-006. Three accuracy classes for continuous totalisers.", "id": "totalised-load-viii-continuous-totaliser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/totalised-load-viii-continuous-totaliser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Instruments are divided into three accuracy classes as follows: 0,5; 1; 2.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Discontinuous totaliser", "annex": "VIII", "accuracy_class": "0.2, 0.5, 1, 2", "measurement_condition": "Totalised load", "maximum_permissible_error": "+/- 0.10 % to +/- 1.00 % depending on class", "scope_note": "MI-006. Four accuracy classes for discontinuous totalisers.", "id": "totalised-load-viii-discontinuous-totaliser", "url": "https://referencesource.org/legal-metrology-accuracy-classes/totalised-load-viii-discontinuous-totaliser/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "Instruments are divided into four accuracy classes as follows: 0,2; 0,5; 1; 2.", "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Water meter", "annex": "III", "accuracy_class": "N/A (single class)", "measurement_condition": "Upper zone (Q2 included to Q4), water temperature <= 30 degrees C", "maximum_permissible_error": "2 %", "scope_note": "MI-001. Volume measurement, upper zone, cold water.", "id": "upper-zone-q2-included-to-q4-water-temperature-30-degrees-c-iii-water-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/upper-zone-q2-included-to-q4-water-temperature-30-degrees-c-iii-water-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "2 % for water having a temperature \u2264 30 \u00b0C,", "verified_fields": [ "maximum_permissible_error" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Gas meter", "annex": "IV", "accuracy_class": "1.5", "measurement_condition": "Upper zone (Qt to Qmax), volume or mass at metering conditions", "maximum_permissible_error": "1.5 %", "scope_note": "MI-002. Class 1.5 gas meter, upper zone MPE.", "id": "upper-zone-qt-to-qmax-volume-or-mass-at-metering-conditions-iv-gas-meter", "url": "https://referencesource.org/legal-metrology-accuracy-classes/upper-zone-qt-to-qmax-volume-or-mass-at-metering-conditions-iv-gas-meter/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The gas meter shall not exploit the MPEs or systematically favour any party.", "verified_fields": [ "instrument_type" ], "derived_fields": [ "measurement_condition", "scope_note" ] }, { "instrument_type": "Automatic rail weighbridge", "annex": "VIII", "accuracy_class": "0.2, 0.5, 1, 2", "measurement_condition": "Weighing-in-motion, single wagon or total train", "maximum_permissible_error": "+/- 0.1 % to +/- 1.0 % depending on class", "scope_note": "MI-006. Four accuracy classes for rail weighbridges.", "id": "weighing-in-motion-single-wagon-or-total-train-viii-automatic-rail-weighbridge", "url": "https://referencesource.org/legal-metrology-accuracy-classes/weighing-in-motion-single-wagon-or-total-train-viii-automatic-rail-weighbridge/", "source": "https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32014L0032", "source_quote": "The MPEs for weighing-in-motion of a single wagon or a total train are shown in Table 9.", "derived_fields": [ "measurement_condition", "scope_note" ] } ] }