Regulation for measuring systems for continuous and dynamic measurement of liquids other than water


Date FOR-2007-12-21-1738


Ministry of Industry and Ministry of Fisheries


Published in 2008 Booklet 1


Commencement 01/01/2008

Edited
FOR 2016-05-03-471

Changes


For
Norway

Legal

LOV-2007-01-26-4-§7, LAW-2007-01-26-4-§8, LAW-2007-01-26-4-§10, LAW-2007-01-26- 4 §19, LAW-2007-01-26-4-§20, LAW-2007-01-26-4-§30, LAW-2007-01-26-4-§35, TO-2007-12- 20-1723-5-2

Promulgated
11.01.2008 kl. 15.40

Short Title
Regulations Concerning the measurement system

Chapter Overview:

Chapter 1 - Introductory provisions (§§ 1-5)
Chapter 2 - Requirements for measurement system (§§ 6-37)
Chapter 3 - Final provisions (§§ 38-39)

Adopted by Metrology 21 December 2007 pursuant to the Act on 26 January 2007 no. 4 to units of measurement, measurement and standard time § 35, ref. § 7 and § 10 and § 8, § 19, § 20 and § 30 and regulation 20 December 2007 no. 1723 on measurement units and measurement § 5-2 second paragraph.
EEA information: EEA Agreement, Annex II, Sec. IX. 27b (Directive 2004/22 / EC amended by Directive 2009/137 / EC).
Sent to notification under the Act of 17 December 2004 no. 101 on European notification of technical rules mm (EEA hearing Act) § 11, ref. § 10; see. The EEA Agreement, Annex II, Chap. XIX. 1 (Directive 98/34 / EC, as amended by Directive 98/48 / EC).
Technical rules upheld, cf. Announcement May 3rd, 2016 No.. 471.
Changes: Amended by regulations 20 Dec 2010 No.. 1750, September 9, 2011 No.. 921, 16 Dec 2013 No.. 1525, 18 Dec 2015 No.. 1755 February 1, 2016 No.. 89, March 1, 2016 No.. 209 as amended by regulation 29 March 2016 no. 330 (regulations amended in its entirety), april 22, 2016 No.. 413, May 3, 2016 No.. 471.

Chapter 1 - Introductory provisions

§ 1. Scope These regulations set out the requirements for measuring systems, cf. Regulation of 20 December 2007 no. 1723 on units of measurement and Chapters 3 and supplementary rules concerning validation during use.
The requirements of these Regulations apply when

A)
such measurement system is sold or offered for sale, cf. Regulations on measurement units and measurement § 3-1 and when

B)
such measuring system used as a basis for calculating the financial settlement, cf. Regulations on measurement units and measurement § 3-4.

This regulation sets no requirements for electromagnetic radiation. This is regulated by the Regulations on 10 August 1995 no. 713 on electrical equipment.

§ 2. Definitions In these regulations:

A)

Measuring system: A system that includes the flow sensor, and all means necessary to ensure accurate measurement or to facilitate measurement operations.

B)

Flow Meter: A measuring instrument for continuous measurement, recording and display of the amount of fluid flowing through a measuring sensor in a liquid filled pipe under defined conditions. Only measuring instruments that measure liquids other than water are covered by this definition.

C)

Measurand: The particular quantity subject to measurement.

D)

Influence quantity: One size that is not the measurand but that affects the result of measurement.

E)

Specified operating conditions: The values ​​of the measurand and influence quantities making up the measuring system's normal operating conditions.

F)

Disturbance: An influence quantity having a value within the limits specified in the appropriate requirement but outside the measuring system operating conditions. An influence quantity is nevertheless a disturbance if it is not specified in the operating conditions.

G)

Critical change value: The value at which the change in the measurement result is considered undesirable.

H)

Direct: A trading transaction is direct sales if:

I.
Test result forms the basis of the price paid,

II.
Least one of the parties involved in the transaction related to measurement is a customer or another party requiring a similar level of protection and

III.
All parties in the transaction accept the measurement result at that time and that place the transaction occurs.

I)

Climatic Environments: The environments in which the measuring system can be used. It defined a range of temperature limits to account for climate differences between Member States.

§ 3. Requirements for measuring system measuring system must at least meet the basic requirements set out in Chapter 2. Maximum permissible error of measurement system specified in § 29
measuring system is type approved by previous regulations, shall use fulfill the requirements existed when the measuring system was approved, including requirements for measurement accuracy during use.

Measuring system that is not rightfully conformity mark or has valid type approval and initial approval, are not allowed to use.

§ 4. Inspection and approval on the sale of the measuring system measuring system sold or offered for sale, must have valid conformity assessment under the provisions of regulations on measurement units and measurement Chapter 4.
measuring system is type approved according to "general adjustment provision 25 / 81 "can first be approved in accordance with the up until 2008. Initial approval shall then be carried out under the rules on national conformity assessment regulations on 20 December 2007 no. 1723 on measurement units and measurement Chapter 4 section 5. This applies only if type approval for the current meter is not more than 10 years when meter should first be approved.

§ 5. Supervision of a measuring system used a measuring system is subject to a periodic audit of the supervision period of one year. Measurement system used at the gas station and the like and measuring

A)
fuel and other fuels liquids other than liquefied gases

B)
washer fluid

C)
excipients associated fuel consumption

And
measurement system used for measuring liquid gas (LPG) is not subject to supervision period.

Testing of the measuring system in connection with the checks to be performed in accordance with relevant sections of the applicable OIML R117, R105 OIML and Metrology procedures, unless Metrology deems it more appropriate and judged properly perform testing otherwise.
The metrological tests shall normally be performed with the same fluids measurement system measures during normal operation. If this is difficult to achieve, for example. For safety reasons, it may instead be used for liquids with similar physical properties.
During the test must be available in sufficient quantity of liquid to the test and the necessary equipment, qualified personnel and control gear nearby.

Chapter 2 - Requirements for measurement system

Section I - General requirements

§ 6. Measuring Technical protection and quality level A measuring system shall have a high level of metrological protection so that all interested parties can have confidence in the measurement results, and it must be designed and manufactured to satisfactory quality level with regard to measurement technology and measurement data security.

§ 7. Intended use and foreseeable misuse Consideration should be given to the measurement system's intended use and the foreseeable misuse when selecting solutions adopted to meet the requirements.

§ 8. Allowable error Under rated operating conditions and in the absence of a disturbance to measure the error does not exceed the maximum permissible error as specified in § 29. Unless otherwise specified in Section II, expressed the maximum permissible error as the deviation from the true measurement value as a bilateral.
Under operating conditions and when there is a disturbance, the performance requirement as laid down in Section II.
If the measuring system is intended for use in a given permanent continuous electromagnetic field, the measurement result during the experiment with amplitude-modulated electromagnetic fields lie within the maximum permissible errors.

§ 9. The manufacturer shall specify the climatic, mechanical and electromagnetic environments in which the measuring system is intended to be used, as well as power supply and other influence quantities likely to affect its accuracy, taking into account the requirements set out in Section II.

§ 10. Climatic environmental manufacturer shall specify the upper and lower temperature limit from the values ​​in Table 1 and indicate whether the measurement system is designed for condensing or non-condensing humidity as well as the intended location is open or closed.
Table 1

Upper temperature limit
30 ° C
40 ° C
55 ° C
70 ° C

Lower temperature limit
5 ° C
-10 ° C
-25 ° C
-40 ° C

§ 11. Mechanical environmental Mechanical environments are classified into the following classes:
Table 2


M1 This class includes measurement system used in locations with minimal exposure to vibration and shock, eg. gauges mounted on the light supporting structures exposed to negligible vibrations and shocks transmitted from local blasting, construction work, smelling with doors etc.

M2
This class includes measurement system used in locations with significant or high levels of vibration and shock, eg. caused by machines and passing vehicles in the vicinity or by the meter is placed in the immediate vicinity of heavy machinery, conveyors etc.


M3 This class includes measurement system used in locations with high and very high vibration and shock levels, such as instruments mounted directly on machines, conveyor belts etc.


It should consider the following influence quantities in connection with the mechanical environment:

A)
Vibration

B)
Shock.

§ 12. Electromagnetic environment Unless otherwise provided in Section II classified the electromagnetic environment in the following classes:
Table 3


E1 This class includes measurement system used in locations with electromagnetic disturbances corresponding to those likely to be found in buildings used for residential and commercial purposes, and light industrial buildings.


E2 This class includes measurement system used in locations with electromagnetic disturbances corresponding to those likely to be found in other industrial buildings.


E3 This class includes measuring system supplied by the battery of a vehicle. Such meters shall meet the requirements of E2 and the following additional requirements:
voltage drop caused by energizing the starter circuit of internal combustion engines and voltage transients when disconnecting depleted battery while the engine is running.

It should consider the following influence quantity associated with electromagnetic environments:

A)
Voltage Interruption

B)
Short voltage reductions

C)
Voltage transients on supply lines and / or signal lines, electrostatic discharge

D)
High-frequency electromagnetic fields

E)
Transmitted radio frequency electromagnetic fields on supply lines or signal lines

F)
Surge on supply lines and / or signal lines.

Consideration should be given to the following additional influence quantities as appropriate:

A)
Voltage Variation

B)
Variations in mains frequency

C)
Power frequency magnetic fields

D)
Other sizes that can affect the meter's accuracy significantly.

§ 13. Basic rules for testing and the determination of errors The basic requirements specified in § 8 shall be verified for each relevant influence quantity. Unless otherwise specified in Section II, these basic requirements when each influence quantity is applied and its effect evaluated separately, all other influence quantities being kept relatively constant at their reference values.
Metrological tests shall be carried out during and after the application of the influence quantity, whichever corresponds to the normal operating state of the measuring system when that influence quantity is likely to occur.

§ 14. Humidity According to the climatic environment measuring system is intended to be used, may be the most appropriate test stream either the damp heat (non-condensing) or damp heat cyclic (condensing).
Cyclic test varying moisture is appropriate where condensation is important or when penetration of vapor will be accelerated by ventilation. When conditions where non-condensing humidity is important, test the damp heat appropriate.

§ 15. Reproducibility The measuring system used to measure the same measurand but in different places and by different users, the results of successive measurements in close agreement. Difference between the measurement results shall be small relative to MPE.

§ 16 Repeatability The measurand have the same value and the measuring conditions are unchanged, the subsequent measurement results correspond well. Difference between the measurement results shall be small relative to the maximum permissible error.

§ 17. Resolution and sensitivity A measuring system shall be sufficiently sensitive and must be sufficient for the intended measurement task.

§ 18. Durability A measuring system shall be designed so that its metrological characteristics are sufficiently stable for a period estimated by the manufacturer, provided that it is installed, maintained and used according to manufacturer instructions and in the environment it is intended for.

§ 19. Reliability A measuring system shall be designed so that the effect of a defect that would lead to an inaccurate measurement result, is reduced as much as possible, unless such mistakes are obvious.

§ 20. Suitability A measuring system shall be:

A)
suitable for its intended use, taking into account of the practical working conditions, and it shall not be unreasonable demands of the user to obtain a correct measurement result

B)
Robust and made of materials suitable for the intended operating conditions

C)
Constructed so that measurement function to be controlled by the meter is marketed and used. If necessary, special equipment or software for this control shall be part of the measurement system. The test procedure shall be described in the user manual

D)

Insensitive to small variations in the value of the measurand, or to react in an appropriate way if the meter is designed to measure the value of the measurand that is constant over time.

A measuring system shall not be of such a nature that it can easily be used for fraud, and the possibility of unintentional misuse shall be minimal.
If a measuring system has associated software with other functions besides the measuring function, the software that is critical for the metrological characteristics shall be identifiable and shall not be inadmissibly influenced by the associated software.

§ 21. Protection against corruption If the measuring system is connected to another device directly or by remote connection, should its metrological characteristics are not affected by the arrangement is inappropriate.
Components that is critical for metrological characteristics shall be designed so that they can be secured. Security measures should make it possible to determine whether the intervention has taken place.
Software that is critical for metrological characteristics shall be identified as such and shall be secured. Software identification shall be easily obtained from the measurement system. Evidence that there has been an intervention shall be available for a reasonable period.
Measurement data, software that is critical for measurement characteristics and metrologically significant parameters stored or transmitted shall be adequately protected against accidental or intentional corruption.

§ 22. Information to be applied or consequential measuring system A measuring system shall bear the manufacturer's mark or name and information about the meter's accuracy. To the extent applicable, shall be the following information is included on the measuring system:

A)
Relevant information on conditions of use

B)
Measuring Capacity

C)
Measuring range

D)
Identity Brand

E)
Number of the certificate of EC type-approval or EC design examination

F)
information about options that provide test results comply with the provisions of the regulations issued regarding regulated metrological control.

Details of operation shall comply with the measuring system unless the meter is so simple that this is unnecessary. The information must be easily understood, and shall include where relevant following:

A)
Specified operating conditions

B)
Electromagnetic Environment

C)
Upper and lower temperature limit, whether condensation is acceptable or not, open or closed location

D)
instructions for installation, maintenance, repairs, permissible adjustments

E)
Directions for correct operation and any special conditions of use

F)
Conditions for compatibility with interfaces, sub-assemblies or measuring instruments.

All marks and inscriptions shall be clear and unambiguous and should not be removed or moved. Groups of identical measuring system is not necessary with individual instruction manuals.

§ 23. Display of measured value Unless otherwise specified in Section II shall scale interval for a measured value to the form 1 × 10n, 2 × 10n or 5 × 10n, where n is an integer or zero. Of measurement or its symbol shall be shown close to the numerical value.
Shall be used measurement units and symbols that are in accordance with the provisions of regulations on measurement units and measurement.

§ 24. Display of results The results should appear on a display or hard copy. By copy the print or record shall also be easily legible and could not be removed.
Any result shall be clear and unambiguous and accompanied by such marks and inscriptions necessary to inform the user of significance of the result. The result displayed should be easily readable under normal conditions. Further information can be displayed on the condition that it can not be confused with the metrologically controlled results.
A measuring system for commercial transactions in terms of direct sales shall be constructed so that the measurement results are displayed for both parties in the transaction when installed appropriately. Any receipt that is essential for direct sales and that the customer gets through an attached device that does not meet the requirements of these regulations shall be applied to relevant information concerning limitation.

§ 25. Further processing of data to conclude the trading transaction measuring system shall in a durable means the measurement result accompanied by information to identify the particular transaction when the measurement is non-repeatable and the sensor is normally intended to be used when one party to the transaction is absent .

Additionally, a durable proof of the measurement result and the information to identify the transaction shall be available on request the measurement is concluded.

§ 26. Conformity assessment A measuring system shall be designed so that it can easily be considered whether it complies with the relevant requirements of these regulations.

Section II - Specific requirements

§ 27. Definitions In this section apply:

A)

Calculation Unit: Part of a measurement system which receives the output signals from the measuring member (s) and, optionally, from associated measuring instruments and displays the measurement results

B)

Live View: Display of volume or mass, corresponding to the measure size as the measuring system is physically capable of measuring. Direct View can be converted to another quantity using a conversion device

C)

Conversion Unit: Part of the calculation device by taking into account the fluid properties (temperature, density, etc.), As measured by the associated measuring instruments, or stored in a memory, automatically converts

1.
Measured volume of the liquid volume at reference conditions and / or mass, or

2.
Measured mass of liquid to a volume at reference conditions under the same measurement conditions and / or volume at reference conditions.

A conversion device includes the relevant associated measuring instruments

D)

With / without interruption opportunity: A measuring system is considered to have / not have interruptions opportunity when the liquid flow can / can not be stopped easily and rapidly

E)

Flow Meter Fuel: A measuring system intended for the filling of motor vehicles, small boats and small aircraft

F)

The minimum permissible quantity (MMQ) The smallest quantity of liquid providing a metrologically acceptable measurement

G)

Reference conditions: The specified condition parameters as the measured amount of liquid is converted into

H)

Self Device: A specific device is part of a self-service system, and that makes it possible for one or more measurement systems to be included in this system self

I)

Self System: An arrangement that allows the customer to use a measuring system for the purpose of obtaining liquid for suitable use

J)

Flow Rate Interval: The interval between the minimum flow rate (Qmin) and maximum flow rate (Qmax)

K)

Associated measuring instruments: A measuring instrument connected to the computing unit for the measurement of certain sizes that are characteristic of the liquid, with a view to make a correction and / or conversion.

§ 28. Specified operating conditions The manufacturer shall specify the nominal operating conditions of the measuring system, in particular:

A)
Flow rate range. For flow rate range following conditions apply:

1.
Flowrate range of a measuring system shall be within the flowrate range of each of the system elements, especially within the flow sensor area

2.
Flow meter and measuring system:

Table 4

Specific measuring system
The liquid property
Minimum conditions Qmax: Qmin

Flow sensor for fuel
Non-liquefied gases
10: 1

Liquified
5: 1

Measuring System
cryogenic liquids
5: 1

Measuring systems on pipeline and systems for loading ships
All liquids
Suitable for use

All other measuring systems
All liquids
4: 1

B)
The properties of the liquid metering system to measure, specifying the name or type of liquid or the relevant characteristics, such as:

-
Temperature interval

-
Pressure interval

-
Density interval

-
Viskositetsintervall.

C)
The nominal value of the AC voltage supply and / or limits of DC voltage supply

D)
Reference conditions for converted values.

§ 29. Accurate classification and maximum permissible error for amounts of at least two liters, the maximum permissible error for the views given in Table 5. A applies to complete measurement systems in the field under normal operating conditions, B of the test from the instrument itself in a test setup . For quantities less than two liters, the maximum permissible error for the views given in Table 6. Table 5


Accuracy class


0.3 0.5 1.0


1.5 2.5

Measuring systems (A)
0.3% 0.5%


1.0% 1.5% 2.5%


The measuring systems (B)
0.2% 0.3%


0.6% 1.0% 1.5%


Table 6

Measured volume V
maximum permissible error

V <0.1 l
4 × value in Table 5, applied at 0.1 l

0.1 l ≤ V <0.2 l
4 × value in Table 5

0.2 l ≤ V <0.4 l
2 × value in Table 5, applied at 0.4 l

0.4 l ≤ V <1 l
2 × value in Table 5

1 l ≤ V <2l
Value in Table 5, applied to 2 l


Whichever amount is measured, however, the MPE is given by the greater of the following two values:

A)
absolute value of the maximum permissible error given in Table 5 or 6

B)
absolute value of the maximum permissible error for the minimum permissible quantity (Emin).

For minimum permissible quantity greater than or equal to two liters the following conditions apply:

A)
Emin shall fulfill the condition: Emin ≥ 2 R, where R is the smallest scale interval indicator

B)
Emin is given by the formula: Emin = (2MMQ) × (A / 100), where:

1.
MMQ is the minimum permissible quantity

2.
A is the numerical value specified in line A of Table 5.

For minimum permissible quantity of less than two liters of the above condition in subsection a, and Emin is twice the value specified in Table 6, and related to line A of Table 5.
At converted view is the maximum allowable measuring errors in line A in table 5. the maximum permissible error of converted views of a conversion device is equal to ± (A - B), where A and B are the values ​​set forth in table 5. Parts of konverteringsanordningene that can be tested separately:

A)

Calculation Unit: Maximum permissible error of flow rate views are, whatever sign, equal to one tenth of the maximum permissible error as defined in line A of Table 5

B)

Associated measuring instruments: Associated measuring instruments shall have an accuracy at least as good as the values ​​in Table 7. These values ​​apply for displaying characteristic quantities of the liquid displayed by the conversion device

C)

Accuracy for calculating function: Minimum permissible deviation for the calculation of each characteristic quantity of the liquid, irrespective of sign, is equal to 2/5 of the value determined in subparagraph b.

Requirements specified in the fifth paragraph a applies to any calculation, not only conversion.
Table 7

The maximum permissible error
Measuring System accuracy class


0.3 0.5 1.0


1.5 2.5

Temperature
± 0.3 ° C
± 0.5 ° C
± 1.0 ° C

Press
Less than 1 MPa: ± 50 kPa From 1 to 4 MPa: ± 5% Over 4 MPa: ± 200 kPa

Density
± 1 kg / m³
± 2 kg / m³
± 5 kg / m³

The measuring system shall not exploit the MPE or systematically favor one particular party.

§ 30. Maximum permissible effect of disturbances effect of an electromagnetic disturbance on a measuring system shall be one of the following:

A)
The change in the measurement result is not greater than the critical change value as defined in subsection

B)
indication of the measurement result shows a momentary variation that can not be interpreted, memorized or transmitted as a measuring result. For a system with the possibility of disruption this may also mean that it is impossible to perform any measurement

C)
The change in the measurement result is greater than the critical change value, in which case the measuring system shall enable obtaining measurement result just before the critical change value occurred and interrupted the flow.

The critical change value is greater than the maximum permissible error is divided by five for a particular measured quantity or Emin.

§ 31. Durability Having completed an appropriate effort taking into account the time the manufacturer has estimated, the following criteria must be satisfied: The variation of the measurement result after the durability test shall, when compared with the initial measurement result, shall not exceed the value of the measurement system indicated in line B of table 5.

§ 32. Suitability For a measured quantity that relates the same measurement, the displayed values ​​from different devices do not differ from each other by more than one scale interval where devices have the same scale interval. If the devices have different minimum divisions, the deviation should not be greater than the greatest minimum division.
For a self-system rule is that at least the division on the main device of the measuring system shall be the same as at least split the self device and the results of measurements should not differ from each other.
It shall not be possible to divert the measured quantity under normal conditions unless this is obvious.
A percentage of air or gas not easily detectable in the liquid shall not lead to a variation in measurement error greater than:

A)
0.5% for other fluids than drinking liquids and for liquids with a viscosity greater than 1 mPa.s, or

B)
1% for drinking liquids and for liquids with a viscosity exceeding 1 mPa.s.

The allowable variation will not however be less than 1% of the minimum permissible quantity. This value applies for air or gas pockets.


§ 33. Measurement system to direct A measuring system for direct sales shall have the opportunity to reset the indicators. It shall not be possible to divert a measured quantity. By measuring systems for direct reading should be discontinued.
View of the amount of the transaction is based shall be permanent for all parties in the transaction have accepted the measurement result.
Any percentage of air or gas in the liquid shall not lead to a variation in measurement error greater than the values ​​specified in § 32 fourth paragraph.

§ 34. Flow Meter Fuel Indicators on fuel dispensers shall not be reset during a measurement. There will be blocked for the commencement of a new measurement of the indicator is reset.
If a measuring system is fitted with price indication, the difference between the quoted price and the price calculated from the unit price and the indicated amount shall not exceed the price corresponding to Emin. This difference need not be less than the smallest monetary unit.

§ 35. Power Fault A measuring system shall either be equipped with a device for emergency power supply that will maintain all measurement functions under malfunction in the main power supply or be equipped with means to save and display the present data so that it commenced the transaction may close and means to stop the flow the moment the error occurs in the main power supply.

§ 36. Requirements for accuracy classes for measuring systems that are sold to different applications Table 8 specifies requirements for accuracy classes for measuring systems that are sold to different applications. The manufacturer may specify greater accuracy for certain types of measuring systems.
Table 8


Accuracy class Types of measuring system


0.3 Measuring systems on pipelines
- Measuring systems for collection of taxes and duties on mineral oils when loading or unloading ships, railcars and tank trucks.


0.5 All measuring systems if not differently stated elsewhere in this Table, in particular
- Fuel dispensers (not for liquefied gases),
- Measuring systems on road tankers for liquids of low viscosity (<20 mPa.s)
- Measuring systems for loading / unloading of ships, railway tank wagons and tankers,
- Measuring systems for milk,
- Measuring systems for refueling aircraft.

1.0
Measuring systems for liquefied gases under pressure at a temperature of at least -10 ° C
Measuring systems normally in class 0.3 or 0.5 but used for liquids
- Having a temperature of below -10 ° C or above 50 ° C
- With a dynamic viscosity of above 1000 mPa.s
- With a maximum volumetric flow rate of at most 20 l / h.


1.5 Measuring systems for liquefied carbon dioxide. Measuring systems for liquefied gases under pressure measured at a temperature below -10 ° C (except cryogenic liquids).

2.5
Measuring systems for cryogenic liquids (temperature below -153 ° C).

§ 37. Units The measured quantity to be displayed in milliliters, cubic centimeters, liters, cubic meters, grams, kilograms or tonnes.

Chapter 3 - Final provisions

§ 38. Fine Violation of this regulation may result in imposition of fines meted out under the provisions of regulations on measurement units and measurement Section 7

§ 39. Commencement This Regulation shall enter into force on 1 January 2008.