Development of Test System for Testing Total Inward Leakage of Safety Masks
G. D. Patil, S. H. Thopte, P. C. Badekar, M. T. Mahadik (WRIC)
M. R. Kudav, M/s. Venus Safety and Health Pvt. Ltd. (M/s. Vishvesvara Enterprises, Navi Mumbai)
The system will be used for testing and evaluating the quality of the safety masks used in hazardous / chemical / pharmaceutical industries.
The project was successfully completed and the entire system was installed at the sponsoring industry M/s. Venus Safety and Health Pvt. Ltd., Navi Mumbai. The actual performance of the system was demonstrated to the company Directors and Engineers to their satisfaction.
Testing of the electonic control unit
System for Testing Inward Leakage of Safety Mask
The system consists of i) Sodium Chloride aerosol generator, ii) buffer tank for removal of moisture from aerosol and storing the dry aerosol, iii) leakproof wooden chamber (101H ´ 71W ´ 31D) with double door entry for the easy movement of one person inside the chamber. The electronic instrumentation consists of 1) a gas burner and flame controller, 2) yellow flame focusing arrangement, 3) measurement and data conversion system for evaluating the contamination levels inside and outside of the safety mask. The signal conditioning unit comprises of a preamplifier, main amplifier, signal measurement and control card, silicon laboratory microcontroller unit with input / output peripherals. An appropriate software was developed for the auto control of solenoid valves, measurement, analysis of data received and the requisite calculation of inward leakage from the safety masks.