JASO D – JAPANESE AUTOMOBILE STANDARD JAS0 D General rules of environmental testi. Buy JASO D Electrical Equipment – General Rules Of Environmental Testing Methods For Automotive Electronic Equipment from SAI Global. Find the most up-to-date version of JASO D at Engineering

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WR 4R Maximum value of transient voltage: The additional operations shall be carried out subsequent thereto as specified hereunder.: In addition, the test apparatus for 14kHz to 30MHz frequency range electric fields may be the parallel strip line Explanatory Fig.

Any equipment installed on body or the spring of suspension system, the vibration of which is relatively high. JASO D possible. Experimentally, it has been verified that under such condition, almost all the equipment has come to be dewed from the state of frost. Should any abnormality be detected, the duration of time when the voltage has been kept applied and the conditions thereat shall be recorded. I After keeping the test specimen for 1.

The method for natural drop to be alternatively employed was specified so as to be simply applied, jasso a little bit more severe condition than what is expected at usual handling was specified. According to the previous provision, a resistance of 2 ohms or diode had been required to d001 inserted in the transient voltage generating circuit of the power supply system between the power source and the test specimen.

Keep C the test specimen under the conditions for 2. Power supply device for operation of test specimen Remark The constant of each circuit element shall be as listed Table 4.

This deviation may be increased about 8dB by variation of the test conditions. Take the specimen out of the chamber, remove water drops from its surface, if any, then keep it for 2 hours or more under room temperature, test it according to 5.

To measure the electric field strength by installing an EM1 meter or spectrum analyzer at the location of the test specimen: The voltage, however, will be kept jaeo about 18V while the electrolyte remains.

Some examples are given below for reference of temperature setting for these equipment. Should so wide range of difference of temperatures be specified, it would be regarded as a kind of thermal shock test. Therefore, for the each, the general method to be applicable to electronic equipment for automobile has been specified as a representative requirement. The of class 3 carry out according to necessary conditions.


Frequency of repetition Ri: When the ignition circuit is opened by the ignition switch, transient voltage tends to differ according to the arc discharge generated by the switch.


Equipment to be installed at or near the high temperature portion or other special portion. Make the temperature in the chamber gradually approached to a setting temperature specified in Table 7; and when the temperature has jasso to the setting temperature, keep the specimen under the temperature during 1 I0.

Particularly the impressing direction of electric field, the fitting direction of the test specimen for instance, the surface to be faced toward the ground of a specimen shall be faced to the outer conductive surface of the TEM celletc.

Type of tests are classified into conducted and radiated electromagnetic environments according to the propagation paths against troubles such as interferences, etc.

Raytac Module MDBT40/MDBT40-P Certified Automotive Standard JASO D001-94

Further, carry out the test pattern specified in Fig. Equipment subject to d001 voltage test Although kinds of equipment subject to Type A through Type F transient voltage tests are basically left to the agreement of the parties concerned, some examples are given below for the reference taking account of the degree of effects of kinds of devices on the vehicle when some abnormalities have occurred Explanatory Table l.

Results of the study on electrostatic charged voltages of passenger car drivers in winter Fig. Since there had been no any problem on the method under which any one selected among the voltage and temperature shall be kept constant, such opinion was not accepted mainly due to a reason that it is not favourable jasi make the test requirements so complex. Further, the constant temperature chamber shall be so constructed that the chamber does not receive the heat radiation directly from the heat source of the test specimen, however, shall not be applied to the case of a chamber of O or C more.

Therefore, r001 time required uaso release was specified so as to be equal to 10 minutes to the maximum value as long after such maximum value on the condition at normal room temperature and under normal room humidity had been decked to be used.

To be covered on inside surfaces of the metal shield and one side Absorbing material surface right side in Fig. Values specified on Table 5 of the Text are the actual values of related circuit, therefore care must be taken, for condensers in particular, since the indicated and actual capacities of condensers are different. Power supply device Power source supply device from which required DC power is stably available battery and any other similar equipment, the internal impedance of which is so low as same as the batterythe supplied voltage is variable within a range from 8 to 38V, the voltage fluctuation of the power supplied is f within a range of k 0.


Most of the equipments will not cause any trouble with the class 1 test voltage for the normal and cold area specifications, but the class 2 voltage shall be used under the agreement between the persons concerned when the effect of engine frictions, etc.

Maximum value of transient voltage T: Any supplemental explanations of the individual items are made on the paragraph 3 hereof.

JASO D001-94

Jsso points test voltages including both extreme values shall at least be performed, and more points are left to the agreement between the persons concerned.

Specified iaso of resistor and capacitor shall be true value, not designated value. I Type B 1 sec or more I. Classification of tests The classification of tests shall be in accordance with Table. Limited to equipments of special specification vehicles under the agreement between the persons concerned where, Vi: Power supply device for operation of test specimen Remarks1. Which conditions in the referred standard or rule to be applied was not clear.

JASO D 94 datasheet & applicatoin notes – Datasheet Archive

Some test results indicate, if a noise suppressor condenser is installed in parallel to the power supply circuit, it will constitute the major electrostatic capacity of the power supply circuit, and will affect on the generation of arc discharge. Therefore, to the applicable testing conditions, the ISOs recent standards in respect of electric and electronic equipment for automobile were referred.

Should it be essentially required, the frequency of voltage application are recommended to be increased in accordance with the agreement made between the persons concerned. Exponential function type decaying positive polarity transient voltage Type B and Type E: Any test specimen shall be operated after the power supply device, input device and loading devices have been connected therewith, the operation of which shall be monitored by means with a proper monitoring equipment.

Exponentia function type decaying negative polarity transient voltage; however, for the equipment which is always connected to the power supply, the test voltage shall be agreed between the persons concerned.

Examples of resonance phenomena by connecting lead wire Coaxial cable and the effect of the improvement Ferrite tube: As for the intensity of interference electromagnetic field to be impressed in the test, the numerical values of 0.