ДСТУ OIML R 75-1:2014 Теплосчетчики. Часть 1. Общие требования (OIML R 75-1, edition 2002, IDT)

ДСТУ OIML R 75-1:2014
(OIML R 75-1, edition 2002, IDT)

Теплолічильники. Частина 1. Загальні вимоги

 
   
 
 
     
Не є офіційним виданням.
Офіційне видання розповсюджує національний орган стандартизації
(ДП «УкрНДНЦ» http://uas.gov.ua)

Contents

Foreword

1 Scope

2 References

3 Types of instrument

3.1 Complete instrument

3.2 Combined instrument

3.3 Hybrid instrument

3.4 Sub-assemblies of a heat meter, which is a combined instrument

3.5 Equipment under test, EUT

4 Terminology and symbols

4.1 Response time, τ_0.5

4.2 Fast response meter

4.3 Rated voltage, U_n

4.4 Rated operating conditions

4.5 Reference conditions

4.6 Influence quantity

4.7 Influence factor

4.8 Disturbance

4.9 Types of error

4.10 Types of fault

4.11 Reference values of the measurand, RVM

4.12 Conventional true value

4.13 Meter model

4.14 Electronic device

4.15 Electronic component

4.16 Minimum immersion depth of a temperature sensor

4.17 Self-heating effect 5 Rated operating conditions

5.1 Limits of temperature range

5.2 Limits of temperature differences

5.3 Limits of flow rate

5.4 Limits of thermal power

5.5 Maximum admissible working pressure, MAP

5.6 Maximum pressure loss

6 Technical characteristics

6.1 Materials and construction

6.2 Requirements outside the limiting values of the flow rate

6.3 Display (indicating device)

6.4 Protection against fraud

6.5 Supply voltage

7 Specified working range

8 Heat transmission formula

9 Metrological characteristics (maximum permissible errors, MPE)

9.1 General

9.2 Values of maximum permissible errors

9.3 Application of maximum permissible errors

9.4 Maximum permissible errors in service

10 Environmental classification

10.1 Environmental class A (domestic use, indoor installations)

10.2 Environmental class B (domestic use, outdoor installations)

10.3 Environmental class C (industrial installations)

11 Heat meter specifications, inscriptions and instruction manual

11.1 Flow sensor

11.2 Temperature sensor pair

11.3 Calculator

11.4 Complete instrument

12 Information to be delivered with the heat meters or sub-assemblies

Annex A (Mandatory): Heat coefficient equations