This unit covers the selection aspects of gas detection equipment for the design of gas detection systems and installations for hazardous areas. It requires the ability to establish equipment parameters and to evaluate these against manufacturer specifications.  This unit is directly equivalent to the Unit 2.19 Design gas detection systems and installations in the Australian/New Zealand Standard AS/NZS 4761.1 Competencies for working with electrical equipment for hazardous areas (EEHA) Part 1: Competency Standards. Equivalence includes endorsement in the explosion-protection techniques listed in the Range statement of this unit.

Unit details

Location:
Industry
Sunshine
Study level:
Vocational and further education (TAFE)
Unit code:
UEENEEM079A

Prerequisites

A student must have completed one of the following pre-requisites: UEENEEM057A Design explosion-protected electrical systems and installations gas atmospheres; UEENEEM058A Design explosion-protected electrical systems and installations dust atmospheres, or; UEENEEM059A Design explosion-protected electrical systems and installations pressurisation.

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Assessment

Assessment tasks will be designed to reinforce and extend knowledge and skill competence within set and controlled parameters in accordance with each unit's learning outcomes and performance criteria requirements, including the setting of work based practical application tasks designed to provide evidence of competence outcomes, within periodic and scheduled timelines. Students will be expected to demonstrate the following required skills and knowledge: - maintenance procedures in hazardous areas that will ensure the integrity of the explosion-protection technique; - techniques for the installation and maintenance of fixed gas detection equipment; - location of fixed sample points or sensors; - gas and vapour releases; - common problems with fixed gas detectors; - calibration and response checking; - factors to consider in the evaluation and selection of portable and fixed gas detection equipment; - detecting gases and vapours; - oxygen deficiency and effects on safety; - measuring principles of catalytic sensors, electrochemical sensors, infrared sensors and semi-conductor sensors; - measuring principles of thermal conductivity sensors, flame ionization, detectors (FID), flame temperature analyzers (FTA), photo ionisation detectors (PID) and paramagnetic oxygen detectors; - selection of apparatus; - behaviour of gas and vapour releases; - design and installation; - integrity and safety, and; - commissioning and scheduled maintenance.

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