Before the trial starts: fix the questions you are answering
Most trial records fail because nobody agreed on the criteria beforehand. Two people watch the same operator clean the same bay and reach different conclusions. Sit down with the person who will do the work, the person who maintains the equipment and the person who signs the purchase order, and write three lines in the record before day one.
- The workload. Which assets, how many per shift, how often, and how dirty they are at the worst moment of the week.
- The standard of clean. Describe it in observable terms: no visible residue on the housing, no odour after cleaning, no slippery film on the floor.
- The constraints. Where the machine can be plugged in or charged, where it can be stored, who operates it, and whether cleaning happens during or outside production hours.
Those three lines become the comparison table for every model you test, including the hand-pushed steam cleaning machine you are evaluating. If a model meets the workload and the standard but fails the constraints, it fails — no exceptions for a good demonstration.
What to record, asset by asset
Record against jobs, not against days. A trial that reports "steam cleaning worked well this week" tells the buyer nothing. One row per asset type, filled in by the operator immediately after the job, keeps the numbers honest.
| Field to record | How to write it down |
|---|---|
| Setup time | Minutes from wheeling the machine to the work area until the first spray of steam. Heat-up is real labour and it repeats every shift. |
| Time per asset | Start and finish clock times, not an estimate. Note whether the same person did it every time. |
| Result against your clean standard | Meets, partially meets, fails — plus one sentence on what was left behind and where. |
| Water and refill handling | Tank capacity, how many assets between refills, and how long a refill takes including walking to the tap. |
| Power and run time | For battery models: whether one charge covers the shift, and where the machine would be charged. For fixed 220 V models: cable length and whether it reaches the far end of the area. |
| Handling and access | Door widths, thresholds, ramps, lifts, tight aisles, and any point where the operator had to lift or tilt the machine. |
| Chemicals used | Product name and quantity, or an explicit "none". This is the line that changes the cost model. |
| Operator comment | In their own words, recorded the same day. Fatigue, nozzle handling, hose weight and trigger effort surface here and nowhere else. |
| Interruptions and faults | Anything that stopped the job: protection cut-outs, empty water, a kinked hose, a missing fitting. |
Judge the machine against its own duty, not against the demonstration
A distributor demonstration is performed by an experienced operator on a deliberately chosen surface. Your trial is the corrective for that. Write down where the machine is specified to work and where you actually need it to work, and put both in the record.
The hand-pushed PowerDe HMW3, for example, is listed for cleaning and disinfecting hospital beds and medical machinery. Its specification sheet gives a footprint of 1150 × 520 × 1030 mm, a 4.5 kW PTC semiconductor heater, a 50 L clean-water tank that runs on tap water, dry-steam and wet-steam modes, a 48 V battery supply and a high-pressure water gun with nozzle. That combination suits ward corridors, bed frames and equipment housings, and it tells you exactly what to test: does 50 L cover a ward round, does one charge cover a shift, can the unit pass every door on the route, and does the steam dry fast enough that the floor is not left wet.
If your workload is vehicles at a forecourt or car park, the fixed PowerDe HW02 steam cleaner is the model to record instead. It is documented at 6 kW heating power, 160 °C steam temperature, 0.8 MPa vapour pressure and an 80 L SUS304 tank on 220 V, with dry and wet steam plus a vacuum function. Note in the trial record whether the cable reaches the bays you use, and whether the 1200 × 800 × 1200 mm frame with handles fits the storage space you have. A machine that cannot be parked where the work happens is not a candidate, however good the cleaning result is.
One more habit worth building: write down what the machine did not touch. Corners, joints, undersides, hoses and cables are where residue hides. If the trial never covered them, the record should say so plainly rather than leaving a blank.
Turn the record into a cost comparison you can defend
Use your own numbers from the trial week. Take operator minutes per asset from the log, multiply by what the shift actually costs, and put that next to the consumables the trial replaced. High-temperature steam is positioned as a way to raise cleaning efficiency while cutting water use, physical effort and dependence on chemical detergents, so the comparison that matters is steam versus your current chemical-and-hose routine — not steam versus an ideal.
Keep the arithmetic in one table with four columns: current method, steam method, the difference, and how many times you captured each figure. A single row measured once is an anecdote; the same row measured across a full week including the busiest day is evidence. Record the purchase price, the warranty terms you were given in writing, and the service response time the supplier committed to, since a machine that sits idle waiting for a spare part returns nothing.
Before you sign off the trial
Read the record back and answer four questions in writing. Did the machine meet your standard of clean on every asset class, including the worst-case ones? Did it fit the route, the doors and the storage space without being manhandled? Did one shift of water and one charge, or one cable run, cover the workload? And did the operator's comments describe a machine they would accept on a normal day rather than a good day?
Where the answer is unclear, ask the manufacturer to answer it on paper before you buy. A specialist such as PowerDe cleaning equipment can be asked directly about the values your trial could not measure — steam temperature and pressure for a given model, battery capacity and run time, charger output, hose and wand lengths, and the accessory set supplied. Send them the trial record; the right supplier will engage with the gaps, and the way they answer is itself a useful line in the record.
