Barnet Ensign Ross ED810 User Manual

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INSTRUCTION MANUAL

ED810 GAS DETECTOR

I N D E X

Page No.

IMPORTANT NOTE 2

ATEX REQUIREMENTS 2

MARKING 3

GENERAL 3

INSTALLATION 4

SOLENOID VALVE 5

SENSORS 6

OPERATING INSTRUCTIONS 7

CALIBRATION - SEMICONDUCTOR 7

CALIBRATION – HEAD ELECTRONICS 8

DECLARATION OF CONFORMITY 10

ED810 EC-TYPE EXAMINATION CERTIFICATE 11

ZB EC-TYPE EXAMINATION CERTIFICATE 14

ELECTRONIC DEVICES LIMITED

E

ENIGMA HOUSE, ENIGMA BUSINESS PARK, MALVERN, WORCESTERSHIRE WR14 1GD ENGLAND.

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.

ED810 INSTRUCTION MANUAL 27-02-07 2

MARKING

All units have a rating label which carries the following important information:-

Model type: GAS DETECTOR TYPE ED810

Input voltage: 12Vdc/24Vdc (delete as appropriate)

Vmax in; Um: 250V

Code: [EEx ia] II C

Certificate no. Baseefa03ATEX0507

Epsilon x,
gas group II (1) G
and category:

CE marking,
Notified body
number:

Serial no. (serial number must be entered here)

Year of construction: (year of manufacture must be entered here)

GENERAL

The ED810 is a fixed installation gas detection system which can detect a wide range of
flammable and toxic gases dependent upon sensor type used.

The ED810 is designed for use in 12V or 24V DC insulated and earthed return electrical
systems. For insulated return systems special consideration should be given to the
“Hazardous Area common connection” terminal. This should normally be connected to a
good quality earth suitable for intrinsically safe equipment. However this terminal is
internally connected to 0V (-VE) of the DC supply and on insulated return installations may
produce an earth fault. Isolation can be provided by using a DC-DC inverter, or if mains is
available, a suitable linear power supply unit. Both are available from EDL.

Attention is drawn to the need for correct cabling, particularly to the sensors located in the
Hazardous Area. The cable supplied by EDL for use with the ED810 has been tested to
ensure correct parameters, see installation section of this manual.

Attention is also drawn to the need for calibration soon after installation. When supplied
alarm levels are approximately set for the target gas (if stated with order) so that a measure of
immediate protection is obtained once correct operation has been ensured.

1180

ED810 INSTRUCTION MANUAL 27-02-07 3