Safety - Honeywell Searchline Excel Open-Path Technical Handbook

MAN0530 Issue 09 October 03
2104M0506
Ensure that you read and understand these instructions BEFORE operating the equipment. Please pay
particular attention to the Safety Warnings.
1. The Searchline Excel gas detector is certified for and intended for use in potentially hazardous
areas. Install and use the Searchline Excel gas detector in accordance with the latest regulations.
2. For installations in the UK, the Code of Practice SELECTION, INSTALLATION AND
MAINTENANCE OF ELECTRICAL APPARATUS FOR USE IN POTENTIALLY EXPLOSIVE
ATMOSPHERES should be strictly observed. General recommendations are given in BS 5345:
Part 1:1989. Specific requirements for flameproof (Type 'd'), intrinsically safe (Type 'I') and increased
safety (type 'e') protection are given in BS 5345: Part 3: 1979, BS 5345: Part 4:1977 and BS
5345: Part 6:1978 respectively. Consideration should also be given to BS EN 60079-14. Refer to
BS 6959:1988 in the UK or the appropriate local or national regulations.
3. For installations in North America, the national Electrical Code (NFPA 70 - 1990) or later issues
should be strictly observed.
4. Elsewhere, the appropriate local or national regulations should be used.
5. The Searchline Excel gas detector must be properly earthed to protect against electrical shock
and minimise electrical interference. For electrical installation design considerations refer to
Section˚3.
6. Operators must be fully aware of the action to be taken if the gas concentration exceeds an alarm
level.
7. Dismantling or repair of equipment should be carried out in the safe area only.
8. Test gases may be toxic and/or combustible. Refer to Material Safety Sheets for appropriate
warnings.
9. Do not drill holes in any housing as this will invalidate the explosion protection.
10. In order to maintain electrical safety, the unit must not be operated in atmospheres with more
than 21% oxygen.
11. Ensure that the bolts which secure flameproof enclosures are fully tightened. The securing bolts
used are made from a special certified grade of steel. Only bolts supplied by Zellweger Analytics
should be fitted for this purpose.
12. Do not open the enclosure in the presence of an explosive atmosphere.
13. The transmitter unit contains high voltages when operational. These are discharged when the
unit is removed from its enclosure.
14. The conduit and cable glands fitted to Searchline Excel should not be modified. If, however, it
becomes necessary to make modifications they must comply with the relevant national Codes of
Practice.

SAFETY

WARNINGS
2
Searchline Excel