What a powered demonstration can and cannot prove
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A powered demonstration shows what the equipment did under the conditions you observed. It does not automatically establish sustained performance, every function, safe installation at your site or suitability for your production task.
Record the demonstration precisely. That gives you useful evidence without turning a brief event into a guarantee.
Describe what happened
Consider a fictional conveyor shown running empty for two minutes. The observation supports a narrow statement: the belt moved during that demonstration. It does not establish its performance under the buyer's intended load, its behaviour over a full shift or the condition of every component.
That does not make the demonstration worthless. It helps identify operation, noise, visible behaviour and questions for further assessment. The problem is claiming more than it showed.
Use this observation record:
| Field | What to record |
|---|---|
| Asset | Lot, model and relevant identity |
| Date and operator | When it happened and who operated the equipment |
| Conditions | Supply, material or load used, duration and visible settings |
| Functions demonstrated | Specific actions observed |
| Result | Factual behaviour and any reported limitation |
| Exclusions | Functions or conditions not demonstrated |
| Follow-up | Evidence or inspection needed for the intended use |
Do not include operating instructions or sensitive information unnecessarily. The record is for the purchase assessment.
Agree the demonstration scope beforehand
Ask the organiser what is available and permitted. A site may be unable to run disconnected equipment or provide a representative material or load.
Do not pressure staff to improvise a test. Use people competent for the equipment and suitable arrangements. A buyer should not remove guards, bypass controls or energise a machine to settle uncertainty during a viewing.
The general viewing checklist helps separate observation from testing and unknown condition. If the proposed demonstration cannot answer the important question safely, consider an appropriate specialist assessment or a different buying decision.
Connect the observation to your task
Ask whether the demonstrated configuration matches the lot and the intended use. Accessories, software, tooling and connected services can affect what was possible at the sale site.
If a function depends on an excluded component, record that dependency. The machine may not perform the same operation after collection without additional equipment or rights.
Use the parts and support guide to investigate components or service needs that arise from the demonstration. Do not treat a successful short run as evidence that a critical replacement part remains available.
Plan the checks after delivery
Moving and reinstalling equipment can change its conditions. HSE's inspection guidance explains the inspection requirement where safety depends on installation, including after reassembly at a new site in Great Britain.
The wider PUWER overview addresses suitability, maintenance, safe use and information and training. A viewing demonstration does not replace those responsibilities.
Use the installation and commissioning guide to budget the route from delivery to productive use. Distinguish that work from investigating a suspected fault; one does not automatically include the other.
Ask UK Auction Group what demonstration evidence exists for the specific lot and what limitations apply. Keep the answer with your observations so the approved bid reflects the equipment actually shown and the questions still open.
Sources
- HSE inspection of work equipment Checked
- HSE PUWER overview Checked
This guide gives general information. Equipment-specific, legal, tax and safety decisions may need a qualified adviser or competent specialist. The guides do not promise sale prices, fees or results.