Verify weighing instruments


This unit of competency covers the ability to apply National Instrument Test Procedures to determine whether a non-automatic weighing instrument or catchweigher is suitable for trade and then verify it accordingly.

This unit of competency is applicable to verifiers operating under a licence to test and mark specific classes of weighing instruments. Weighing instruments are used in a very wide range of commerce. For example, weighing instruments are used to measure a wide range of products at the point of sale, as an order or as a pre-packaged article. There is a large range of environments where these instruments are used, including pharmaceutical laboratories, supermarkets, fresh food retailers, packing houses, the chemical/petroleum industry, construction, mining and other extractive industry sectors.

Depending on the site, verifiers may be required to meet additional local safety requirements, such as basic first aid, confined space entry, working with heavy machinery, working at heights and completing site safety induction. Verifiers may take up to one day perform to verifications in routine environments.

Under the requirements of Regulation 2.43 of the Trade Measurement Regulations 2009, a servicing licensee or an employee must not verify a measuring instrument relevant to this unit unless they hold a statement of attainment for this unit of competency.

Elements and Performance Criteria

Elements describe the essential outcomes

Performance criteria describe the performance needed to demonstrate achievement of the element


Prepare for verification


Identify and evaluate the type of instrument to be verified


Access and correctly interpret documentation required for the verification


Identify and access test equipment, products and consumables required for the verification


Liaise with the trader to provide the items required on site


Ensure specified test equipment is fit for purpose in accordance with applicable legislation and organisational procedures


Store and transport test equipment in accordance with organisational procedures and industry best practice


Identify relevant local workplace health and safety issues and implement appropriate control strategies


Evaluate weighing instrument performance


Evaluate whether the operating environment will impact on the instrument performance


Modify the operating environment or implement alternative arrangements to ensure reliable test conditions as necessary


Identify the maximum permissible errors for the instrument from the legislative requirements


Use test equipment safely in accordance with applicable legislation and organisational procedures


Check instrument for compliance with the appropriate Certificates of Approval


Inspect the instrument in accordance with relevant National Instrument Test Procedures and appropriate National Measurement Institute (NMI) policy


Evaluate results against prescribed performance criteria and determine if the instrument is suitable for trade use in accordance with legislative requirements


Report verification results


Display the verification result on the instrument in accordance with legislative requirements


Use test reports to present verification results in the required format


Complete verification documentation in accordance with legislative requirements and organisational procedures


Communicate results within the specified time and in accordance with organisational guidelines


Model and encourage compliance with statutory requirements


Apply organisation’s quality procedures and practices to meet servicing licensee’s legislative obligations


Clarify any issues about verifier obligations with their servicing licensee and/or licensing administering authority as they arise


Review work and seek feedback from others to confirm continuing compliance with legislative requirements


Identify implications of non-compliance with legislative requirements


Identify inadequacies in trader’s use of instruments which may contribute to non-compliance with national measurement legislation


Explain inadequacies and possible remedial actions to trader


Respect the rights of the trader at all times


Maintain statutory records


Keep accurate and complete records in accordance with servicing licensee’s legislative requirements


Ensure authorisation, training and relevant licences are current in accordance with organisational and servicing licensee’s legislative requirements


Inform the licensing administering authority of changes to personal information as required by statute

Evidence of Performance

Evidence of competence in this unit must satisfy all of the requirements of the elements and performance criteria, and include demonstration of:

testing and marking at least three (3) instruments from one (1) or more of the following classes of weighing instruments:

non-automatic weighing instruments ≥3 tonne

automatic Class Y(a) Catchweighers

automatic Class Y(b) Catchweighers

accessing and correctly interpreting documentation required for verification of weighing instruments

planning, scheduling, preparing for and safely conducting a verification to optimise use of resources and minimise disruption to the public and trader

ensuring test equipment and reference standards are fit for purpose in accordance with applicable legislation and organisational procedures

checking compliance and evaluating the performance of weighing instruments using appropriate Certificates of Approval, National Measurement Institute (NMI) policy and National Instrument Test Procedures, and adjusting for any impact of the operating environment and operational factors

reliably determining if weighing instruments are suitable for trade use in accordance with legislative requirements

displaying the verification result on the instrument and completing all verification documentation in accordance with legislative requirements and organisational procedures

identifying and communicating any inadequacies in servicing licensee's organisational procedures and practices that may contribute to non-compliance with legislative requirements

maintaining the accuracy, completeness and currency of statutory records required of servicing licensees, such as authorisation, training and relevant licences

identifying and communicating any inadequacies in trader's use of weighing instruments which may contribute to non-compliance with national measurement legislation

demonstrating professionalism and respecting the rights of the trader at all times

using communication and negotiation skills to:

explain the verification purpose, procedures and outcomes to traders, verifiers and managers

inform traders of non-compliances and consequences of failing to rectify them

access external equipment and resources to complete the verification

using numeric skills to perform calculations involving:

fractions, decimals, ratios, proportions and percentages

scientific notation, correct units and the correct number of significant figures

interpretation of statistical quantities, such as mean, median, mode, range, variance and standard deviation

maintaining the security and confidentiality of data in accordance with organisational and regulatory requirements

reporting results in the required formats and expected timeframe

working safely.

Evidence of Knowledge

Must provide evidence that demonstrates knowledge of:

general science principles and concepts, including weight, mass and gravity

metrological terms and terminology specific to weighing instruments, including maximum permissible errors, traceability, uncertainty, maximum permissible difference, eccentricity, repeatability, error of measurement, error of indication and linearisation

details of the design and applications for one (1) class of weighing instruments, the components and their function

servicing licensee requirements, including:

quality management system

licence conditions

maintenance of statutory records

national measurement legislation applicable to weighing instruments

safe work method statements (SWMS) for trading environments relevant to job role

NMI policy, National Instrument Test Procedures and operating procedures for equipment, and reference standards used in job role, including:

purpose of test, test conditions and possible environmental impacts on performance of the instrument

key preparation/measurement steps in test method

calculation steps to give results in appropriate units and precision

maximum permissible errors for weighing instruments under test

organisational policy and procedures for verifying weighing instruments, including completion of test results, verification documents and statutory records

organisational safety procedures and requirements of applicable Commonwealth, state and territory work/occupational health and safety (WHS/OHS) legislation

basic first aid and site safety induction, if required.

Assessment Conditions

Judgement of competence must be based on holistic assessment of the evidence. Assessment methods must confirm consistency of performance over time, rather than a single assessment event.

This unit of competency is to be assessed in the workplace, or a simulated workplace environment. A simulated workplace environment must reflect realistic operational workplace conditions that cover all aspects of workplace performance, including the environment, task skills, task management skills, contingency management skills and job role environment skills.

Foundation skills are integral to competent performance of the unit and should not be assessed separately.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Knowledge evidence may be collected concurrently with performance evidence or through an independent process, such as workbooks, written assessments or interviews (provided a record is kept in each case).

This unit of competency may be assessed with:

MSMTMREF301 Use and maintain reference standards

Holistic assessment methods include:

review of test results, verification documentation and verifier statutory records completed by the candidate

feedback from supervisors and peers regarding the candidate's ability to verify the performance of weighing instruments in accordance with legislative and organisational procedures

questions to assess understanding of relevant verification procedures, servicing licensee requirements, trader obligations and remedial actions

review of candidate’s responses to verification scenarios, such as potential/actual non-compliances of traders and verifiers, appropriate actions, common issues and problems

observation of the candidate verifying weighing instruments.

Access is required to weighing instruments, equipment, materials, workplace documentation, procedures and specifications associated with this unit, including, but not limited to:

latest versions of appropriate documentation, such as Certificates of Verification and Approval, NMI policy, National Instrument Test Procedures for verifying weighing instruments and relevant legislation

equipment manuals, material safety data sheets (MSDS), safety procedures and safety equipment

records, such as test reports, audit reports, instrument history and test results

weighing instruments, test equipment and reference standards

computer and relevant software and/or organisation information management system.

Assessors must satisfy the assessor competency requirements that are in place at the time of the assessment as set by the VET regulator.

The assessor must demonstrate both technical competency and currency.

Technical competence can be demonstrated through:

relevant VET or other qualification/Statement of Attainment AND/OR

relevant workplace experience in trade measurement at least to the level being assessed and broad industry knowledge (such as a relevant industry qualification).

Currency can be demonstrated through:

performing the competency being assessed as part of current employment in trade measurement OR

having consulted with trade measurement inspectors and/or verifiers performing the competency being assessed within the last twelve months.

Foundation Skills

This section describes those language, literacy, numeracy and employment skills that are essential to performance.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

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.

National Instrument Test Procedures include one or more of:

measurement instrument test procedures

any other test procedure prescribed by the NMI

Classes of weighing instruments include one or more of:

non-automatic weighing instruments tested without substitution loads

automatic Class Y(a) Catchweighers

automatic Class Y(b) Catchweighers

other weighing instrument prescribed by the NMI

Test equipment includes:

reference standards of measurement

Certificates of Approval include:

any Certificate issued by the Chief Metrologist under Regulation 60 of the National Measurement Regulations approving the pattern of a weighing instrument as being suitable for trade

Prescribed performance criteria for weighing instruments include:

that the instrument is of an approved pattern

that the instrument operates within the appropriate limits of error permitted by legislation

that the instrument is used in accordance with any legislative requirements


Has the same meaning as Section 18GG of the National Measurement Act 1960

Verification marks

Verification marks for different instruments are defined in Sections 2.28 and 2.29 of the National Trade Measurement Regulations

Trading practices include one or more of:

methods used for the sale of goods

using measuring instruments

position of measuring instruments

environmental factors

suitability of instrument

incorrect measurement

Enforcement actions include one or more of:

formal warnings, infringement notices, undertakings, injunction and prosecutions

Legislation includes:

national measurement legislation

applicable Commonwealth, state and territory work/occupational health and safety (WHS/OHS) legislation

NMI policy includes:

test procedure variations between a verification, in-service or audit inspection




WHS/OHS and environmental management requirements include:

complying with WHS/OHS and environmental management requirements at all times, which may be imposed through state/territory or federal legislation. These requirements must not be compromised at any time

applying standard precautions relating to the potentially hazardous nature of samples

accessing and applying current industry understanding of infection control issued by the National Health and Medical Research Council (NHMRC) and State and Territory Departments of Health, where relevant


Competency Field

Trade measurement