ISA Certified Control Systems Technician (CCST) program
Certified Control System Technicians (CCSTs) calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables.
The purpose of an intrinsic safety barrier is to:
A. provide a physical obstruction between the hazardous and nonhazardous areas.
B. establish a central grounding point in the hazardous area.
C. prevent excess voltage or current from reaching the hazardous area.
D. increase the resistance in the circuit to reduce the risk of explosion.