Range of VariablesThe Range of Variables explains the contexts within which the performance and knowledge requirements of this standard may be assessed. The scope of variables chosen in training and assessment requirements may depend on the work situations available |
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What irrigation systems might be relevant to this standard? | These may be pressurised irrigation systems such as micro-irrigation, spray irrigation or gravity fed irrigation systems.Micro-irrigation systems include mains pressure, low pressure, below or above ground, sprays systems, drip emitter trickle, t-tape, mini-sprinklers, capillary, ebb and flow, and flood systems.Spray irrigation systems include travelling irrigators (soft hose, hard hose boom type) centre pivot, linear move, powered side roll hand shift permanent (installed), and bike shift/easy shift.Gravity fed irrigation systems include border check, contour irrigation, furrow irrigation, hillside flooding and basin irrigation. Border check systems may be either permanent or temporary earth, plastic or concrete devices for insertion in a drain for reticulating water, contour banks used to collect and distribute water along the perimeter of an irrigation plot, contour banks within a plot to collect/distribute water or larger scale systems to stop water exiting one area to another. Irrigation systems may range from manual operation and monitoring to fully automated with computer control and monitoring. |
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What faulty components or system parts might need to be replaced? | These may vary according to brand and supplier and may include, but not be limited to, injectors, pumps, tensiometers, probe tubes, flow meter, pressure gauge, controllers, solenoid valves, wiring, quick coupling valves (QCV), computer and/or other scheduling devices, pipes, jets, micro jets, laterals, sprinklers, emitters, integrated dripline "thin wall", seals, outlets and gears. |
What operational tests of the system may be conducted? | These may include pressures, flow rates, sprinkler performance, calculation of co-efficient of uniformity and distribution uniformity. |
What might be the OHS requirements for maintenance activities? | Requirements may include systems and procedures for safe manual handling, outdoor work (including protection from solar radiation, dust and noise), selection, use and maintenance of relevant personal protective clothing and equipment, selection, care and safe use of hand tools and safe systems for the prevention of electrical injury. |
What may be involved in gaining access to faulty components or blockages? | Gaining access may require specific approvals from property owners/managers and may involve excavation work. |
How might faulty components be disposed of? | Disposal of faulty components must occur in an environmentally responsible way. For example, metal and plastic components may be recycled, returned to the manufacturer, or disposed of in accordance with enterprise procedures. |
For more information on contexts, environment and variables for training and assessment, refer to the Sector Booklet. |
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