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Evidence Guide: MEM21015 - Perform precision watch timing and adjustment

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM21015 - Perform precision watch timing and adjustment

What evidence can you provide to prove your understanding of each of the following citeria?

Determine servicing requirements and liaise with customer

  1. Follow standard operating procedures (SOPs)
Follow standard operating procedures (SOPs)

Completed
Date:

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Comply with work health and safety (WHS) requirements at all times

Completed
Date:

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Identify high-grade mechanical watch characteristics

Completed
Date:

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Prepare written quotation and inform customer of watch condition and performance concerns, outlining recommended service procedures to be undertaken to remedy identified faults and accuracy of timekeeping

Completed
Date:

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Verify and agree on servicing requirements with customer

Completed
Date:

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Prepare watch for handover

Completed
Date:

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Record and document repair process

Completed
Date:

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Analyse watch performance

  1. Establish an appropriate clean and safe work environment
Establish an appropriate clean and safe work environment

Completed
Date:

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Select and use appropriate personal protective equipment (PPE) in accordance with SOPs

Completed
Date:

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Use hand tools and equipment in safe and correct manner

Completed
Date:

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Handle components without damaging or marking

Completed
Date:

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Assess condition and ability of watch to achieve chronometer performance

Completed
Date:

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Conduct performance analysis of mechanical watch

Completed
Date:

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Adapt servicing techniques to meet manufacturer performance specifications (chronometer certified rating)

Completed
Date:

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Assess oscillator and balance spring condition

Completed
Date:

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Analyse positional errors in mechanical watch

Completed
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Adjust mechanical watch performance

  1. Adjust mechanical watch to minimise positional errors
Adjust mechanical watch to minimise positional errors

Completed
Date:

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Adjust mechanical watch to minimise variations in balance amplitude/performance/rate

Completed
Date:

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Adjust oscillator and balance spring to minimise positional errors and perform dynamic poising

Completed
Date:

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Repeat and confirm all adjustments

Completed
Date:

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Test mechanical watch function and performance

  1. Verify instantaneous watch performance and rate testing
Verify instantaneous watch performance and rate testing

Completed
Date:

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Perform longitudinal testing to confirm watch performance

Completed
Date:

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Determine intermittent timing faults and adjustments

Completed
Date:

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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge
Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

High-grade mechanical watch characteristics include one (1) or more of the following:

finish of components:

bevelling

graining

level of polish

type of materials used for movement and case construction:

non-magnetic alloys

precious metals

quality of components used:

balance spring

escapement

balance wheel

certification chronometer

brand name

number of jewels

Record and document repair includes one (1) or more of the following:

date and extent of repair

cost of replacement part

time spent on procedure

Performance analysis includes one (1) or more of the following:

watch subjected to various testing positions:

dial up

dial down

crown up

crown down

crown right

left

states of winding:

partly wound

half wound

fully wound

temperature variation

factors affecting isochronism (equal time of vibration)

Oscillator and balance spring condition includes one (1) or more of the following:

static poise of balance wheel:

balance spring condition

concentric

flatness

beating evenly between curb pins

Dynamic poising includes one (1) or more of the following:

set up and determine out-of-poise/balance wheel using a timing machine

identify and locate point of adjustment

methods of adjustment (with cutters or milling tools)

Confirm all adjustments includes the following:

ensuring required accuracy is obtained and timekeeping is in accordance with manufacturer specifications

Watch performance and rate testing includes one (1) or more of the following:

in-beat

rate adjustment

amplitude

effect or influence of escapement

temperature

effect of positional errors

effect of balance wheel poise

effect of balance spring

states of winding

Longitudinal testing includes the following:

testing over extended time period by wearing or simulator machine

Hand tools and equipment include one (1) or more of the following:

mechanical watch timing machine

poising tools

balance wheel cutters

case opening and closing tools

Working environment includes the following:

clean bench and working area

adequate lighting and ventilation

tools and equipment organised and in good condition

ergonomic seating