Loma IQ2 Service Manual page 13

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EMC Interference
All Loma equipment has been designed to operate under factory conditions, and has been tested
to recognised international standards for Electro Magnetic Compatibility (EMC).
However, if your equipment is affected by unexplained false rejections that cannot be accounted
for by any of the suggestions listed under Spurious Triggering, the equipment may be affected by
excessive electrical noise via its supply or airborne (radiated) sources.
Guidance on EMC Considerations when installing your equipment is given in your User Manual.
However, as a first step to eliminating EMC interference, the following considerations should be
checked.
Electrical supply considerations
The unit should have its own dedicated supply, unless the line supply was
known to be clean. The earth should be robust, of low impedance and noise
free.
Any dedicated supply line should run in its own conduit/trunking away from other
noisy supplies.
The input voltage should not be subject to voltage fluctuations outside the limits
(BS EN 61000-6-2):
1. Minus 15% to plus 10% of the nominal supply voltage (230V or 110V).
2. Zero voltage for more than 20mS.
3. 50% of nominal voltage for more than 40mS.
4. 80% of nominal voltage for more than 100mS.
5. Operation outside these limits may cause loss of function until the supply condition
recovers to within limits.
Module 5092
A conveyor bolted together rather than welded (potential for Eddy
Current Loops).
Metallic inks or labels.
Metallic frames to infeed or outfeed guards.
Low grade or reclaimed cardboard packing materials that often
contain metallised paper or foil.
Particles of metal under the skid plate.
Product Description and Environment
3-4