A trial is the point in a steam-cleaning decision where opinion stops and evidence starts. Most companies run the trial, feel satisfied with what they saw, and then lose the value of it, because nobody writes down what was actually done. Weeks later the buyer remembers that the surface came up clean, the maintenance supervisor remembers that the operator had to keep refilling, and the finance reviewer has nothing to work with at all. A PowerDe PWD01 steam cleaner trial is worth recording for exactly that reason: it is a mobile machine, it moves between bays and outdoor parking areas, and the conditions around it change from one location to the next, so a memory of the trial cannot be reconstructed later. This article sets out the record fields a company should capture while the trial is running, who signs each field, and what to do with the record when the trial ends.
Mobile cleaning equipment behaves differently in each place it is used. Floor slope, distance from the parking position to the work face, availability of a water fill point, ambient temperature, and the amount of residue accumulated since the last clean all change the work. That is why a company that trials a mobile steam cleaning machine should write the record while the machine is still on site, with the operator standing next to the person doing the writing. Recreating the trial from recollection a fortnight later produces a document that nobody trusts and that no supplier can act on.
Why the record has to be written during the trial
A trial that is not written down is a trial that cannot be repeated properly. A year later the company will want to extend the method to another bay, and nobody alive can say what was actually done in the first one. The machine, the surface and the soil are all remembered in general terms, and the general terms are wrong.
A second reason is commercial. Purchase decisions inside a company are reviewed by people who did not attend the trial. They will ask what was cleaned, how it was cleaned, what had to be reworked, and what the trial implied about recurring labour. If those answers exist only as conversation, the decision stalls and the trial is repeated. A written record converts one operator's afternoon into a document the buyer, the maintenance lead and the finance reviewer can all read.
The record also protects the trial itself. A trial that nobody wrote down cannot later be defended when a budget is questioned, and it cannot be extended to a second location without starting the questions again from the beginning.
Fix the trial purpose in writing before the machine arrives
The first entry in the record is not an observation; it is the question the trial is meant to answer. Write it as one sentence naming the surface, the soil, and the pass or fail condition. "The trolley frames in bay three can be cleaned without dismantling, with no residue left on the sealing faces" is a usable sentence. "See whether the machine is any good" is not. The purpose sentence governs everything after it, because a trial that never had a defined question cannot produce a defined result.
Record alongside it what the current practice is, in the same words the operators use. If the existing method is a manual wipe with a solvent-wetted cloth, write that. If the existing method is a pressure-wash bay and a drying period, write that too. The comparison is the point of the exercise, and the incumbent method is the only honest reference point.
One more entry belongs on the first page: which company people own each part of the record, and who is doing the writing. Trials fail documentarily when everyone on the floor assumes somebody else is noting it down. Name the recorder before the machine is unpacked.
Identify the variant on site before anything else
The PowerDe PWD01 is offered both with and without a battery, and the catalogue carries the two options as separate product pages. Before the first pass, write down which variant is standing in front of you, and record the page reference or model marking that proves it. This matters for two practical reasons. The untethered variant changes how far the operator can travel from a parking position, which changes the workflow you are measuring. And the powered variant ties the trial to a charging arrangement that has to be available at every location you later want to use.
Do not assume the two variants behave the same, and do not transfer observations from one to the other. If the company wants a conclusion about both, run and record two trials. If only one variant is being assessed, say so explicitly in the record so that the conclusion is not read later as covering the whole product family.
Record the site conditions that the machine had to work in
For each location where the trial ran, capture a short site block. Where the machine was parked, and how far the operator had to carry the lance to reach the work face. Where the water was refilled, and whether that refill point was inside or outside. Whether the work was under a roof or in open parking, and what the weather was doing at the time. Whether power was drawn from an existing socket, an extension reel, or the machine's own stored energy. Whether drainage was available where the work finished.
These details look like trivia and turn out to decide the outcome. A machine that performed well in a covered bay with a water tap two metres away may be a poor fit for an open yard with no services, and the record is the only place where that distinction survives. Record one site block per location, never one combined block for the whole trial.
Describe the surface and the soil as they were found
Before the first pass, photograph the work face and describe it in writing. Material of the surface, whether it is painted, plated, anodised or bare. Whether there are seals, gaskets, bearings, electrical connectors, adhesive bonds or insulated windings in or near the area. How long the soil has been there, and what it consists of. A baked-on oil film that has been through several heat cycles is not the same problem as fresh grease, and a deposit that has been on a surface for a quarter behaves differently from one deposited in a shift.
Anything in the area that the supplier was not told about should be written into the record at this point, not after the cleaning. Heat-sensitive components, bearings that were re-greased only recently, coatings that are already lifting, and areas where water is normally excluded all belong here. If the supplier confirmed suitability for a particular surface before the trial, attach that confirmation to the record and quote it by reference.
Also describe how the machine reached that surface: which door it entered by, where it was parked, and whether staff had to lift it over a threshold, a drainage channel or a kerb. With a mobile machine, handling is part of the result being recorded, and an operator who struggled to move the machine across a yard will mention it once and never repeat it unless somebody writes it down.
Log the method settings actually used, not the settings available
Steam and hot-water machines offer distinct working modes, and a mobile active-water machine such as the PWD01 is described as covering dry steam, wet steam and hot-water work. The record should state which mode was used for each surface, in the order the surfaces were worked, and where the operator changed mode and why. A single line per surface is enough: mode used, nozzle or applicator fitted, distance held from the surface, number of passes, and whether a wipe or squeegee finish followed.
Do not copy published figures into this section. What matters for the trial is what the operator actually did, which is often a compromise: shorter dwell time than expected, a wider lance distance because the surface was delicate, or an extra pass because the soil was thicker than described. Those compromises are the substance of the record. If you also want the machine's published specification, take it from the product page on the PowerDe site and attach it as a separate document rather than blending it into the observation log.
Write the acceptance criteria as observable results
A result is only recordable if someone can check it without an opinion. Express the criteria as things a third person could confirm: the sealing face is free of visible residue when inspected under the normal bay light; no liquid has collected behind the bearing shield; the painted panel shows no lifting at the edges after drying; the operator can complete the pass without re-positioning the machine more than a set number of times.
For each criterion write three things: what was required, what was observed, and the verdict. Keep the verdict short and binary. If a criterion could not be assessed during the trial, write that as the verdict rather than leaving the line blank, and name what would have been needed to assess it.
Capture the operating observations that affect recurring cost
Cost questions dominate most internal reviews, and most of them are decided by operational friction rather than by the headline cleaning result. Record consumable and utility demands as observed needs: water refill points required, whether the machine had to be re-energised between sections, whether the operator needed assistance to move or position it. Record the preparation and clearing time around the working pass, not only the pass itself, because a company schedules the whole task, not a fragment of it.
Document any deviation from the agreed scope as it happens
Trials drift. Someone asks for an extra surface, the scope shrinks because a line was running, or the agreed surface turns out to be more contaminated than expected. Every drift should be entered in the record at the moment it happens, with the name of the person who authorised it and the reason. A record that quietly reflects a different trial from the one that was agreed is worse than no record, because it will be read later as if the agreed scope had been tested.
Anything unusual is also worth capturing: difficulty starting or maintaining the working mode, an unexpected interruption in supply, a consumable or accessory that did not fit, a handling problem on a slope or over a threshold. Do not interpret these in the record; describe them, date them, and put the interpretation in the findings section at the end.
State plainly what the trial did not cover
Every trial is partial, and the record should say so before anyone else has to guess. Write the surfaces that were not tested, the locations that were not visited, the shift patterns that were not covered, and the questions that remain open. For a mobile machine, the locations question is usually the most important gap: one bay is not the site. If the company plans a wider rollout, name the additional locations that need their own trial, and note what would have to be true at each of them.
Where the trial raised a technical question the company cannot answer itself, record it as a question with a named owner and a date, and route it to the supplier rather than closing it with an assumption. Questions about suitable mode selection for a delicate surface, about accessories, or about how the machine should be configured for a particular location are exactly the questions the supplier should answer in writing, and that written answer becomes part of the record.
Use one naming and reference system across the record
Consistency of reference makes the record searchable and defensible. Use the model designation as the manufacturer writes it, add the variant wording where it matters, and refer to locations by the names used on site rather than by informal nicknames. Number every page, every photograph and every attachment, and keep a one-page index at the front so a reviewer can find a specific observation without reading the whole file.
Who signs what, and in what order
Split the signatures by responsibility. The operator confirms the observations. The supervisor or maintenance lead confirms the site conditions, the deviations and the safety arrangements. The buyer confirms the trial purpose, the acceptance criteria and the conclusion. A record signed by one person for everything is weaker than a record where each claim carries the signature of the person with authority for it.
Circulate the completed record to everyone who attended, with a short window for corrections, then close it and date the closure. A record that stays open invites after-the-fact editing, which is precisely the practice that destroys its value in a later dispute or a later budget review.
Common reasons these records fail
The most common failure is that the record is written afterwards by someone who was not there. The second is that it contains only successes, which makes reviewers discount everything in it. The third is that it describes the machine rather than the work, so the reader learns what the equipment can do and nothing about what happened on the site.
What the record should be used for afterwards
A well-kept trial record has several lives. It supports the purchase decision now. It becomes the baseline for the next trial at a different location, which is why location-by-location capture matters. It supports operator training, because the method settings that worked are written down. And when the company later reviews its cleaning arrangements across the site, it provides evidence rather than recollection.
If the conclusion is to proceed, the record also tells the supplier what the company expects the machine to do and where. That makes the follow-up conversation about configuration, accessories and site requirements specific instead of general. For companies assessing PowerDe cleaning equipment across several locations, the per-site record is the practical unit of comparison.
A short checklist to take into the trial
Before the machine arrives: trial purpose sentence, current practice description, acceptance criteria in observable terms, named recorder, named signatories. On the day: variant identification, site block per location, surface and soil description with photographs, method settings per surface, observations during the work, deviations as they happen, anything left untested. Before closing: verdicts against each criterion, open questions with owners, attachments indexed, signatures collected, record dated and closed.
None of this requires a specialist form. A company can build the template in a normal document, print it, and fill it in at the machine. What it does require is that someone writes while the work is happening, and that the writing describes the work rather than the brochure.
Specific cleaning parameters depend on equipment materials, installation conditions and local requirements. Confirm equipment compatibility before use.
