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19.Describe the importance of ensuring that all tools are in a safe and serviceable condition, are used correctly and are returned to their correct location on completion of the assembly activities20.Describe the care, handling and application of electronic test and measuring instruments (such as multimeter, oscilloscope, signal generators, stabilised power supplies, logic probes/analyzers, measuring bridges)21.Explain how to check that test equipment is safe to use (such as condition of power cables, using suitably fused test probes, clips and leads); how to check that equipment is within current calibration approval dates, and pat tested; checking that the test equipment is suitable for the tests they are to carry out and can cover the range and values they are to measure it’s essential that all equipment’s is safe to use, check if the equipment sounds with no sign of mechanical problem, most of the equipment’s have a safety check list, make sure those check list has been completed recently. If you carry out a visual check you can use the manual or data sheet from the equipment.
22.Explain how to connect to an approved power supply and, where appropriate, signal source; identifying correct test points in the circuit; how to position test instruments into circuits without damaging circuit components (such as using test probes, ensuring correct polarity, taking antistatic precautions); setting instrument zero readings; obtaining instrument readings and comparing them with expected resultsA multimeter is one of the many equipment that can be useful when measuring voltage, current and resistance. To setup the multimeter to measure either of them you simply turn a rotary selection dial. To check reading on a circuit board plug the probes to the multimeter select the function to measure voltage or resistance, make sure you only hold the plastic potion of the probes so you don’t get shocked and touch the probes to the circuit board test points, the red probe goes to the test point andthe black goes to ground if you need to measure the resistance than connect one probe to each end ofthe resistor. The measurement will appear on the multimeter display. To record readings, remove the