Seaward A203ES - Manual (Page 4)

GENERAL GUIDANCE NOTES
Electromagnetic Compatibility
Electrical safety tests, required to comply with legislative documents on product testing, may, by their very
nature, encroach on Electromagnetic Compatibility (EMC) requirements, in particular Flash Testing.
Clare test instruments are designed to minimise the effects of EMC disturbance but some interference may
result from particular applications and may well be dependent on the type of product being tested.
The user is therefore responsible for ensuring that the equipment is operated in accordance with the
manufacturer’s recommendations and that any disturbances are investigated and resolved, with, where
necessary, technical assistance from the manufacturer of the test instrument and/or item under test.
Before installing test equipment, the user should assess the potential for any EMC disturbance to cause
interference within the surrounding area. Particular care should be taken with the proximity of some of the
following –
• Supply cables, other than those supplying the instrument, and control, signal and telephony cables –
these may not always be apparent and they could be above, below or adjacent to the test equipment.
• Radio and television transmitters, and receivers, within a distance of 30 metres.
• Computers and other IT equipment within 10 metres.
• Safety critical equipment i.e. machinery guard circuits and the like.
• People using medical implants or appliances such as hearing aids, heart pacemakers etc. within 3
metres.
• Delicate electronic equipment used for calibration or measurement.
The size of the surrounding area to be considered will depend on the overall structure of the building and any
other activities likely to take place. It is also important to remember that the effects of EMC disturbance are
not confined to the boundaries of the premises.
In extreme cases it may be necessary to site the test instrument, and item under test, within the confines of a
screened and filtered enclosure, such as a Faraday Cage. The user should attempt to reduce any
disturbance to the point where it is no longer effecting other equipment or systems.
OM_A203ES Page 4 of 4