A trial with a hand-pushed steam machine usually lasts one day. The question that decides whether the machine gets through the next stage is rarely "does it clean?" It is "what did it actually do, under our conditions, in our building, on our surfaces?" Buyers who treat the trial as an informal walk-around end up with opinions; buyers who record the trial end up with a decision.
This guide covers how to record a trial of the Hand Pushed Steam Cleaning Machine PowerDe HMW3 (without battery) so the result is readable by procurement, by the maintenance team, and by the supplier who has to configure the final order. The model is sold without a battery, so most of what you record is about the power chain, the water chain, and the workflow — not just cleaning performance.
Why the "without battery" variant changes the trial itself
On a battery-included machine, the trial operator plugs in nothing and starts. On the battery-less variant, the machine arrives as the base unit; the 48 V battery that supplies the working power and its charger are arranged separately. That makes the trial partly a purchasing test: you are verifying that the battery you can source locally, or the battery you already stock, actually runs the machine through a full shift.
The manufacturer lists 48 V as the working power supply and 4.5 kW as the heating power. Do not run the heater from a wall socket during the trial just to see it work. If the supply voltage differs from the machine's rating, the trial tells you nothing and the equipment may be damaged. Confirm the working voltage of the machine being tested against the battery pack and charger you intend to use, in writing, before the machine is switched on.
What to fix before the machine arrives
A trial fails when the variables are never pinned down. Set these in advance and write them into the trial record, because they are what make two runs comparable.
- The task. One sentence per task. "Clean and disinfect a ward bed frame after discharge" is a task. "Try it on beds" is not.
- Mode. The HMW3 switches between dry steam and wet steam. Run the same task in both modes, or you cannot say which mode your team will actually use.
- Surface and soil. Record the material and the soil type. Hospital beds and medical machinery are the applications named for this machine; note whether the soil is dried biological residue, lubricant, dust, or general soiling.
- The water. The inlet is tap water with a 4-point internal-tooth joint, and the machine carries a 50 L clean water tank. Note your tap water hardness where you trial, since hardness governs how much scale the machine will see over a year.
- Access. The machine is hand push, 1150 mm long, 520 mm wide and 1030 mm high. Measure the doorways, lifts and corridors on the route it must travel before anyone pushes it down them.
- The pass criteria. Agree what a pass looks like before the trial, not after it.
The parameters to record during the trial
Keep one row per task per mode. The table below is a structure you can copy straight into your own spreadsheet, with the supplier's published figures filled in where they exist and blanks left where the trial has to supply the number.
| Item | Supplier figure | What your trial records |
|---|---|---|
| Machine dimensions | L1150 × W520 × H1030 mm | Clearance through the tightest doorway on the route |
| Mode of movement | Hand push | Effort to push and steer, including with a full tank |
| Heating power | 4.5 kW, PTC semiconductor heater | Time from cold start to usable steam |
| Clean water tank | 50 L | Area cleaned per full tank; number of refills per shift |
| Water inlet | Tap water, 4-point internal-tooth joint | Whether the joint matches your tap fitting, or what adapter is needed |
| Cleaning modes | Dry steam, wet steam | Which mode removes the soil, at what travel speed |
| Working power supply | 48 V battery | Battery pack used, its capacity, and the working time it delivered |
| Cleaning method | High pressure water gun with nozzle | Nozzle used per task, and whether one nozzle covers your tasks |
Three rows deserve extra attention. Heating power of 4.5 kW tells you the machine is built to generate steam quickly, but your team plans shifts around working minutes, not watts — so record cold-start time and continuous working time with the battery you intend to buy. The 50 L tank tells you the onboard water volume, but the useful number is coverage per fill, because that determines how often staff break off to refill. And the inlet fitting is a small detail that stops a purchase if it does not match your site plumbing.
Recording method that survives a handover
Ask one operator to run the machine and a second person to write. The note-taker captures four things per task, in this order.
- Before: a photograph of the surface, taken straight on, with a reference object for scale.
- Process: mode selected, nozzle, distance from the surface, travel speed, and time on the task.
- After: the same photograph, from the same angle, at the same distance.
- Judgement: pass, pass with rework, or fail — plus one line on why.
Photographs matter more than adjectives. A sentence reading "much better" is unusable in six months; two matched photographs are not. Where the machine is being evaluated for cleaning and disinfecting medical equipment, keep the record aligned with the infection-control documentation your facility already requires, and do not let a steam trial stand in place of whichever validation your own protocol demands.
Safety observations to log rather than assume
The product page describes leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion protection on this machine. A trial is where you confirm that those features behave as expected in a real environment, and that your staff respond correctly when they trigger.
- Log any protection trip during the day, with what was happening at the time.
- Log hot-surface contact points: where operators instinctively reach for the frame, and whether that is safe.
- Log steam direction and any effect on nearby equipment, flooring or electrical cabinets.
- Log battery handling: how the pack is fitted, removed and charged, and who is trained to do it.
Turning the record into a decision
At the end of the trial you should be able to answer six questions without reopening the machine.
- Which tasks passed in dry steam, which in wet steam, and which in neither?
- How many minutes of working time did the battery actually deliver?
- How many refills and how much operator effort per shift?
- Does the machine fit the route, the lift and the storage space?
- Do the inlet fitting and the battery arrangement match what your site can supply?
- What is left to confirm with the manufacturer before a purchase order?
Send the completed record to the supplier with the gaps marked. That is the fastest way to get a configuration that matches your site rather than a catalogue entry, and it is how a PowerDe cleaning equipment trial turns into a specified order. If your team needs a battery-included machine instead, compare against the Hand Pushed Steam Cleaning Machine PowerDe HMW3 (including battery) on the same tasks, using the same trial record.
