Exeltech Ltd can help you produce or update your Intrinsically Safe Descriptive System Documents (IS calculations), ensuring that all areas of concern are considered.

The basis of protection in the case of intrinsically safe systems is the limitation of energy into the hazardous area. A document detailing permissible energy levels in the system is an essential requirement. It enables you in the first instance to prove the protection method.

Intrinsically Safe Descriptive System Documents demonstrate compliance by proving that the energy limiting device, the barrier, is compatible with the field device in terms of power, capacitance and inductance values.