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ED810 INSTRUCTION MANUAL 27-02-07 2
IMPORTANT
1.
The equipment supplied must not be modified in any way since modifications will
invalidate intrinsic safety certification, MCA and Lloyds approval.
2.
Care should be taken during servicing as high voltages may be present on the output
contacts.
3.
It is important to note that the ED810 contains four Zener Barriers, type ZB1, which are
“potted” in epoxy resin. The Zener Barriers contain fuses which once damaged are not
replaceable. The fuses inside the Zener Barrier will blow if even temporary short circuits
are placed on the sensor wiring thus rendering the Zener Barrier inoperable and not
repairable. Great care should therefore be taken to avoid inadvertent short circuits.
4.
Electronic Devices strongly recommend consultation of the HSE publication EH40,
which lists the permitted levels of exposure to most toxic gases.
ATEX ESSENTIAL SAFETY REQUIREMENTS
The ED810 gas detector, internally mounted Zener Barriers and associated gas sensors are
ATEX certified Intrinsically Safe and the following important requirements need to be
followed.
1. The equipment must only be installed, operated and maintained by trained competent
personnel.
2. This apparatus has been designed in accordance with EN50 014 and EN50 020,
therefore the apparatus has been designed to meet the fault tolerant requirements of
Associate Apparatus for Category 'ia'.
3. The installation and maintenance must be in accordance with all appropriate
international, national and local standard codes of practice and site regulations for
intrinsically safe apparatus.
4. The installation and maintenance must be in accordance with the instructions
contained in this installation and maintenance manual.
5. Access to the circuitry must not be made during operation.
6. This product is an associated electrical apparatus and must not be installed in the
hazardous area without the provision of further certified hazardous area protection.
7. The product must not be subjected to mechanical and thermal stresses in excess of
those permitted in the certification documentation and the instruction manual. If
necessary the product must be protected by an enclosure to prevent mechanical
damage.
8. The product must not be installed in a position where it may be attacked by
aggressive substances.
9. The product must be protected from excessive dust by an enclosure etc.
10. The product can not be repaired by the user and must be replaced by an equivalent
certified product. Repairs should only be carried out by the manufacturer or approved
service centre.