Why a trial needs a record, not a memory
A trial of a hand-pushed steam cleaning machine usually ends the same way: the operator is impressed, the buyer is interested, and nobody writes anything down. Two weeks later the plant manager remembers "it cleaned well" and the finance lead remembers "we still do not know what it would do to our schedule." Neither memory survives a second decision meeting.
The PowerDe HMW3 is a mobile unit that moves by hand push, heats with a 4.5 kW PTC semiconductor heater, carries a 50 L clean water tank, and runs on a 48 V battery with a high-pressure water gun and nozzle. It offers dry steam and wet steam modes, and the product listing positions it for cleaning and disinfecting hospital beds and medical machinery. The point of a trial is not to confirm the machine works. It is to confirm the machine works on your surfaces, in your layout, with your shift pattern, at your workload. Only numbers captured during the trial answer that.
What to capture: the four recording dimensions
Before the first pass, agree on what the record has to contain. Four dimensions carry almost all of the commercial value of a cleaning trial.
1. Before-and-after condition of the same surface
Photograph the surface before cleaning and after cleaning from the same distance and angle, under the same light. Number each test surface and keep the numbers on every photo and in the log. A photo of "a clean bed frame" proves nothing a month later; a photo of "surface 4, north ward, before and after" does. Where your organisation has a visual cleanliness standard or an inspection scorecard, apply it to the same surfaces before and after and record both scores.
2. Time, labour, and utility per unit of work
Record start and stop times per task, the number of staff involved, and the distance they walked or pushed the machine. Performed against a defined unit — one bed frame, one trolley, one machine guard, one room — this converts a demonstration into a cost comparison you can put next to your current process. Note how long heating takes before the first usable pass, and how often the 50 L tank had to be refilled during the trial; those two numbers shape the rhythm of a real shift far more than peak cleaning performance does.
3. Constraints discovered, not assumed
Trials fail on access and infrastructure, not on cleaning power. Write down door widths and lift dimensions the unit had to pass, whether the floor was slope or threshold-limited, where you connected to water, and whether a 48 V battery charge was enough for a full task or needed a break for charging. The HMW3 connects to tap water through a 4-point internal-tooth fitting; log the actual connection point used, because the distance between that point and your work area changes the operator's workflow.
4. Operator acceptance
Ask the people who ran the machine, while the trial is still warm: what felt heavy, what felt confusing, what would they change. A hand-pushed unit is only an advantage if staff will push it. Their answers predict whether the equipment gets used after delivery, which is the single biggest risk in any cleaning purchase.
A recording template you can hand to the trial team
Keep it to one sheet per task. Columns: date; shift; surface ID and location; soil type; mode used (dry steam or wet steam); pass count; elapsed minutes; staff count; tank refills; recharge needed (yes/no); access issue observed; before score; after score; photograph reference; operator comment. That sheet is enough for a purchase case, and it is light enough that people actually fill it in.
Store the sheet and the photographs together in one folder per trial, named by site and date. Send the folder to whoever owns the budget on the last day of the trial, not when the report is finished. Delay is how trials get lost.
Turning the record into a decision
Compare the trial sheet line by line against your current method: minutes per unit, staff per unit, consumables and water, and whether the after-score meets your standard. If your trial covers medical machinery and hospital beds, compare it against the cleaning method already specified for those items, and check the result against your infection-control or hygiene requirements rather than against opinion. If your trial is an industrial one, compare the steam pass against the solvent or manual scrubbing step it would replace, including the time staff spend on preparation and cleanup.
Two conclusions usually come out of a well-recorded trial. Either the unit meets the standard at a defensible cost, and you move to quantity and configuration. Or it does not, and the log tells you which constraint failed — access, runtime, water supply, or the level of soil — so the conversation continues on facts. In both cases the record, not the impression, carries the decision.
Two cautions. First, do not publish performance claims from your own trial outside your organisation unless your internal approval process allows it; trial data describes your site, not a general guarantee. Second, the published data sheet for this model covers dimensions, movement, heating power, tank volume, water inlet, steam modes, working power supply, and cleaning method; values such as steam temperature, steam pressure, battery runtime, and weight are not on that page, so confirm them with the manufacturer in writing before you put them in a specification or a tender. If your site needs a stationary, mains-powered setup instead of a battery unit, review the cleaning equipment series and send PowerDe your layout and workload so the recommendation matches your conditions.
