Find the most up-to-date version of JSA – JIS Z at Engineering JIS Z Standard conditions of the test site. Standard Atmospheric Conditions for Testing 1. This standard application range, the temperature of the . JIS Z Standard atmospheric conditions for testing (FOREIGN STANDARD). standard by Japanese Industrial Standard / Japanese.
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The voltage, however, will be kept at about 18Vwhile the electrolyte remains, The A method is set considering this situation. Subsequent operations shall be as follows: Even equipments installed in the vehicle room are subject to severe temperature conditions if they are so located as exposed to direct rays 803 sunshine when the vehicle is parked at a high temperature are.
JIS Z 8703:1983
Kind of dust of JIS Z subject to selection of kind of the test to be carried out being made in accordance with the agreement made by and between the persons concerned.
Although it is desirable that the test apparatus shown in Fig. In case where no abnormality is found after applying the test may be stopped. Record the characteristics of 2 the equipment accordingly. Typical values of transient voltages under the above mentioned conditions are as follows.
Particularly, strong electromagnetic fields that occur near radio transmission facilities represented by broadcasting stations, those which mis around the vehicle body by the operation on board radio of transmitter represented by transceiver, and troubles caused by interferences nis from high frequency voltages, etc.
JIS Z – Standard atmospheric conditions for testing (FOREIGN STANDARD)
A study jsi been carried out so as to obtain allowable range of the testing voltage. The length of the grounding is desirable to keep constant within the range of 30—70cm. JIS C Basic environmental testing procedures pare 2: When establishing the provision for the standard, only open circuit was assumed, because the duration of transient voltage tends to prolong significantly when the ignition circuit is opened as compared with the case where the circuit is closed.
Equipment subject to transient 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 1.
Number of impressions is specified as 3 times or more, but about 10 times are desirable. The additional operations shall be carried 2 out jls thereto as specified hereunder: Test in type B and C, test arrangement shall be so that specimen is jiw to power supply device, input device and loading devices shown ad in Dig.
Results of the study on charged electrostatic voltages of line workers of the automobile manufacturer in winter Fig.
As in particular case, when the vehicles for foreign dry lands are applied, test conditions test voltage, applying period, number of impressions may otherwise be specified under agreement between the persons concerned, as making the test voltage 20KV or 25KV.
Test conditions are specified separately for Type A impressing at terminalsand Types B and C impressing at operating portion according to the difference of the conditions the equipment is handled in use or the happening or the equipment with electrostatic discharge.
However, due lack of practical experiences and actual applications, it was decided not to be specified. Confirm also the appearance, etc.
Classification requirements The classification of tests shall be in accordance with Table. The test order of setting temperature is not particularly specified.
However, voltages that are induced and impressed by transient voltages and electro-magnetic disturbances ijs not included. 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.
Appearance and other conditions of the equipment at that time shall also be confirmed.
From the results above mentioned, this electromagnetic resisting characteristics test using TEM cell is useful as a test method to jid the operation of an electronic equipment unit under specific condition of lead wire connection, but conducted electromagnetic test that examine the effects of 873 lead wire, wiring, etc. 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.
Such devicestherefore, may be excluded from this standard, but it is desirable that the test methods specified in this standard are applied to those equipments. In the necessary case, the testing conditions severity of the shock, height of drop, etc. Test equipment of JIS C or any other equipment, the performance of which are equivalent thereto. However, 7803 there was not any testing specified in this standard, the minor deviation of testing voltage at which is important, it was decided to provide a provision to specify that the testing voltage shall be applied, which shall js monitored so as to be correct by means with any voltmeter of accuracy in the class of 0.
However, supposed that those tests are required to examine the changed behavior of the equipment due to change of the environmental conditions only by temperature and humidity cycle test, it is not possible to identify due to which the behavior available has been changed, either temperature change or humidity change.
In respect of method of treatment for measurement of performance after the temperature and humidity cycle test, the three conditions as listed hereunder were specified; 1 Water on surface to be dried, 2 Overall sections to be dried, and 3 Surface to be kept as it is, should water in drop be kept attached thereon. Among them, the 3 was especially specified, by being jid the situation of the equipment sensor, actuator etc.
Of load dampings, A-1 and D-1 ate the tests for transient voltages caused by the delayed response in field coil.
Therefore care must be taken, for condensers in particular, since the Indicated and actual capacities of condensers are qpttodiffer each other. Number of impressions is specified as 3 times or more, but about 10 times are desirable, impressing may be done not only between the earth terminal and all other terminals but alsoif necessarybetween each terminal and the case, and in particular case test conditions test voltage, applying period, number of impressions may otherwise be specified under agreement between the persons concerned.
Appearance and other conditions of the test equipment at that time shall. Typical values of the former are as follows, and constants of parts of the test circuit are specified based on them: Moreover, in case of the equipment in 24V system, two different kinds of the testing circuits on which the voltage shall be applied for a duration of time so long as equal to 60 times shall be constructed, subject to the voltage condition being same as it of 5. 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.
In case of the equipment, the heat mass of which are utmost highthe duration of time for holding at low temperature and the time required of release in constant temperature and humidity chamber may be optionally fixed in accordance with the agreement made between the persons concerned.
Regarding above operations as one cycle refer to Fig. Some examples are given below for reference of temperature setting for these equipment. When the ignition circuit is opened by the ignition switchtransient voltage tends to differ according to the arc discharge generated by the switch, 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.
Test apparatus a power supply device, input device sloading device s and a constant temperature chamber capable to maintain the temperature within the allowable range shown in Table 8 regarding each setting temperature specified in Table 7 shall be used.
Although these test apparatuses are desirable to be used in low temperature atmosphere, they may be used under room temperature if it is considered acceptable according to the agreement between the persons concerned.
As for the intensity of interference electromagnetic field to be impressed in the test, the numerical values of 0.