| Model: 04/02/12V
2Sensor Survey

Suitable for Boiler Rooms, Boats, Caravans, Dyno Pits |
Combustible
Gas Detection Systems For Marine Craft
K1. Introduction
This Appendix details the minimum requirements for a combustible
gas detection system, which is to be installed in a marine craft
where Clause 6.7.6.11 applies
K2. Gas Detection System
The gas detection system shall comply with all of the following
(a) Be suitable for the marine environment.
(b) Be waterproof, resistant to corrosion and the entry of dust
(c) Be capable of continuous operation from a low voltage source
(i.e. wired direct to a battery) and indicate the operational status
within 30 seconds of power being supplied.
(d) Have at least two outlets for connection of external equipment
(eg. gas solenoid valve, audible alarm, bilge blower etc.)
(e) Activate the alarm function and cause a solenoid valve to close
off the gas supply whenever the concentration of LP Gas in air exceeds
25% of the lower explosive limit.
(f) Have a latching system, which continues to indicate an alarm
condition until cancelled.
(g) Be self-checking and indicate both normal and fault conditions
(h) Have fully serviceable units and be supplied with full installation
and operating instructions.
(i) All switches are to indicate their operational position. This
indication is to be permanently marked.
(J) Markings on the fascia of the unit, including the manufacturer's
name and address, are to be permanent. |