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eLibrary > BS EN 12645:2014 Tyre pressure measuring instruments. Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles. Metrology, requirements and testing >

BS EN 12645:2014 Tyre pressure measuring instruments. Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles. Metrology, requirements and testing, 2014

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BS EN 12645:2014 Tyre pressure measuring instruments. Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles. Metrology, requirements and testing, 2014

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Categories
5 Metrological requirements [Go to Page]
5.1 Maximum permissible errors
5.2 Hysteresis error
5.3 Zero [Go to Page]
5.3.1 Return of the instrument's indication to zero
5.3.2 Zero setting
5.4 Units
6 Technical requirements [Go to Page]
6.1 Construction
6.2 Analog indicating tyre pressure measuring instrument [Go to Page]
6.2.1 Scale angle
6.2.2 Scale interval
6.2.3 Scale spacing
6.2.4 Index
6.3 Digital indicating tyre pressure measuring instrument [Go to Page]
6.3.1 Scale interval
6.3.2 Readability
6.4 Additional constructional requirements [Go to Page]
6.4.1 Mechanical tyre pressure measuring instruments
6.4.2 Electronic tyre pressure measuring instrument
6.4.3 Electronic and mechanical tyre pressure measuring instruments
6.4.4 Preset device
6.5 Operating conditions [Go to Page]
6.5.1 Climatic requirements [Go to Page]
6.5.1.1 Rated temperature in service
6.5.1.2 Rated storage temperatures
6.5.1.3 Humidity
6.5.1.4 Corrosion requirements
6.5.2 Mechanical requirements [Go to Page]
6.5.2.1 Protection against ingress of water and foreign particles (degree of protection)
6.5.2.2 Durability of the measuring instrument
6.5.2.3 Vibration
6.5.2.4 Free fall
6.5.3 Electromagnetic immunity requirements for electronic tyre pressure measuring instruments (with digital display and/or electronic sensor) [Go to Page]
6.5.3.1 Essential requirements
6.5.3.2 Technical requirements
6.5.3.3 Acceptance criteria
6.5.4 Software requirements for electronic tyre pressure measuring instruments
6.5.5 Mounting position requirements
6.5.6 Kind of pressure indication requirement
7 Type approval testing to check for compliance with metrological and technical requirements [Go to Page]
7.1 General
7.2 Determination of accuracy error
7.3 Determination of hysteresis error
7.4 Determination of return of instrument’s indication to zero
7.5 Determination of error after/during a disturbance or influence
7.6 Climatic tests [Go to Page]
7.6.1 Determination of the MPE in the rated temperature in service
7.6.2 Rated storage temperature
7.6.3 Humidity
7.6.4 Corrosion test
7.7 Mechanical tests [Go to Page]
7.7.1 Protection against ingress of water and foreign particles (degree of protection)
7.7.2 Examination of the durability of the measuring instrument
7.7.3 Vibration (random)
7.7.4 Free fall
7.8 Electromagnetic immunity [Go to Page]
7.8.1 AC mains voltage variations
7.8.2 DC mains voltage variations
7.8.3 AC mains power
7.8.4 Bursts on AC and DC mains
7.8.5 Electrostatic discharges
7.8.6 Fast transients on signal and I/O lines
7.8.7 Surges on signal and I/O lines
7.8.8 DC mains power
7.8.9 Ripple on DC input power ports
7.8.10 Surges on AC and DC mains lines
7.8.11 Radiated radio-frequency electromagnetic fields
7.8.12 Conducted radio-frequency fields
7.8.13 Voltage variations (if powered by vehicle battery)
7.8.14 Electrical transient conduction along supply lines (if powered by vehicle battery)
7.8.15 Load dump (if powered by vehicle battery) [Go to Page]
The pulse shape and parameters for an alternator with centralised load dump suppression are given in Figure 4 and Table 5 below.
7.9 Software examination
7.10 Mounting position
7.11 Determination of pressure sensor — kind of pressure test
8 Inscriptions and marking [Go to Page]
8.1 Inscriptions [Go to Page]
8.1.1 Obligatory inscriptions
8.1.2 Optional inscriptions
8.2 Verification marks and sealing
9 Metrological control [Go to Page]
9.1 Type approval
9.2 Initial Verification
9.3 Subsequent verification
9.4 In-service control
Annex A (normative) Correspondence between requirements and tests
Annex B (normative) MPE graphics
Annex C (informative) Examples of type approval test sequence for multiple samples
Annex D (informative) Recommended solutions for special test conditions
Bibliography [Go to Page]

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BS EN 12645:2014 Tyre pressure measuring instruments. Devices for inspection of pressure and/or inflation / deflation of tyres for motor vehicles. Metrology, requirements and testing, 2014

⨯To continue with accurate pricing,
please select your company type below: