EUCA Science & Technology Co., Ltd. products

The spark test apparatus serves for testing intrinsically safe circuits. The test is based on whether the tested equipment is capable ofproducing sparks, arcs in normal operation, capable of igniting the gas mixture specified by the standard, in the given chamber, under given conditions. The apparatus includes a built-in gas mixer producing the gas mixture for testing and calibration with a high accuracy. The actualmeasuring process is completed with the purging of the chamber after the measuring process, aiming at the removal of the needless combustions products.

The MESG apparatus is capable of determining the g0 value (maximum experimental safe gap) and the associated g100 valuerequired for the classification of gases, vapours and mists. Furthermore the apparatus can be applied to check the accuracy of a given gas concentration. In order to attain the required accuracy, a stepping motor with gear transmission adjusts the gap size. During 80 steps the stepping motor makes 1 m. Thus the gap size can be adjusted with an accuracy of ± 1 m. The actual measuring process is completed with the purging of the chamber after the measurement, aiming at the removal of the needless combustions products.