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The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
Oscillator construction types | Oscillating construction types may include: roskoph nickel glycudur chronometer 2, 3, 4 arms bi-metal compensating annular balance spring (e.g. flat and overcoil) tourbillion |
Performance characteristics | Performance characteristics may include: timing, certified chronometer effects of temperature, shocks, magnetism and position of wear temperature compensation |
Record and document repair | Record and document repair may include: extent and date of repair cost of replacement part time spent on procedure |
Workshop tools and equipment | Workshop tools and equipment may include: hand tools levers (e.g. balance spring) roller removing tool staking set watchmaker's lathe balance wheel truing tool poising tool figure of eight calipers spirit lamp presto roller jewel fitting tool |
Oscillator components | Oscillator components may include: balance wheel balance spring balance staff roller roller jewel |
Type of construction | Type of construction may include: balance staff (e.g. friction fitted, riveted and screwed) roller (e.g. single table, double table, incabloc and two piece) roller jewel shape (e.g. D shape, triangular and ellipitical) balance spring (e.g. flat, overcoil, helical, spherical and conical) |
Wear and damage | Wear and damage may include: balance staff pivots bent, scored or worn balance wheel out of true, damaged or enlarged hole roller tables deformed or damaged roller jewel cracked, chipped or missing balance spring centred flat, at the cock and collet |
Appropriate repair process | Appropriate repair process may include: consideration of component cost and availability replace balance complete replace balance staff repair or replace balance spring repair or replace roller dismantling and reassembling techniques inspections adjustments of components lubrication techniques, type and quantity use of stop oil treatments (e.g. Epilame and Fixodrop) |
Type and method of balance staff removal and replacement | Type and method of balance staff removal and replacement may include: friction fit riveted screwed turning rivet/hub on lathe knock out staking set (e.g platax tool) grinding molfre tool shock-resistance (e.g. incabloc) |
Correct operation | Correct operation may include: balance staff secure fitting/tightness roller aligned and secure balance wheel true balance wheel static poised balance spring stud location in-beat balance spring adjusting balance staff end shakes |
Type of roller and roller jewel | Type of roller and roller jewel may include: single table double table two piece shock-resistance (e.g. incabloc) D shaped, triangular or elliptical roller jewels |
Shock protection devices | Shock protection devices may include: operating principles components (e.g. jewels, endstones, combined setting and shock spring) types of construction (e.g. incabloc, Kif, Seiko, Citizen and Wyler) |
Watch performance | Watch performance may include: in-beat 0.5 ms amplitude (e.g. minimum 220 - 270 degrees, variations in positional errors) rate +/- 5 - 10 seconds a day |