Reaffirmed 2018

1. Scope

This standard specifies tests and performance requirements of electric tachometer system with or without hour meter or revolution counters for use on automotive vehicles other than the two and three wheelers.

2. References

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

2500 (Part 1) : 2000 Sampling inspection procedures: Part 1 Attributes sampling plans indexed by acceptable quality level (AQL) for lot by lot inspection (third revision)

9000 Basic environmental testing procedures for electronic and electrical items:

(Part 2/ Sec 3) : 1977 Cold test, Section 3 Cold test for non-heat dissipating items with gradual change of temperature

(Part 3/Sec 3) : 1977 Dry heat test, Section 3 Dry heat test for non-heat dissipating items with gradual change of temperature

(Part 5/Sec 2) : 1981 Damp heat (cyclic) test, Section 2 12 + 12 h cycle

(Part 7/Sec 1) : 2006/IEC 60068-2-27 (1987)Impact test, Section 1 Shock (test Ea)

(Part 7/Sec 4) : 1979 Impact test, Section 4 Free fall

(Part 8) : 1981 Vibration (sinusoidal) test

(Part 10) : 1979 Mould growth test

(Part 11) : 1983 Salt mist test

(Part 12) : 1981 Dust test

(Part 16) : 1983 Driving rain test

ISO 10250 : 1982Severities for environmental tests for automotive electrical equipment

ISO 7637-2 : 2004 Road vehicles - Electrical disturbances from conduction and coupling - Part 2: Electrical transient conduction along supply lines only

ISO 7637-3 : 1995 Road vehicles - Electrical disturbances by conduction and coupling - Part 3: Vehicle with nominal 12V or 24V supply voltage - Electrical transmission by capacitive and inductive coupling via lines other than supply lines