● Talk to consultants and others in your industry
about their experience of IS. Which manufacturers
have they worked with? What is their radio users’
experience of IS?
● It is mandatory to commission a professional risk
analysis of the environment in which you operate.
● Determine the probability or frequency of an
● Consider the consequence of ignition – what
Equipment Protection Level (EPL) do you require?
It may be appropriate to specify equipment with
an EPL that’s higher than the Zone category would
normally equate to.
● Battery charging must be performed outside of
● Internal radio repairs must be carried out by a
manufacturer-approved service facility that holds
IEC Ex certification.
● Where servicing is permitted, replacement of circuit
boards or components affecting intrinsic safety must
be made with traceable parts as specified in audited
● The battery is not repairable. If it fails, or reaches the
end of its life, it must be replaced with the approved
type specified by the radio manufacturer. The battery
is an IS-critical component and any substitute will
invalidate the IS certification and could contribute to
Using IS equipment:
Purchasing IS equipment:
● Understand your radio label – know where you
can use the radio and under what conditions.
● Ensure all radio users are properly trained in safe
use of the radio equipment.
● IEC Ex IS radios should be readily identifiable,
with conspicuous ‘Ex’ labels on the radio and the
battery. Some may also have a distinguishing
color (light blue is standard), at the customer’s
discretion. If unsure whether the radio is suitable
for use in a particular location, check the label
certification details and manual instructions.
Remember that any accessories must have a
similar IEC Ex rating to provide protection.
● Never remove your portable radio battery in a
hazardous environment, or carry a spare battery
into that environment, if the label warns against