How VISLAT Performs Aging and Waterproof Testing

Evidence status note: this article describes the reliability testing that VISLAT states it performs, and explains how a buyer can verify each element. The 48-hour aging cycle, 72-hour burn-in and IP66 water-spray statements currently appear as claims on our own website. They are presented here as current website statements, not as verified facts: supporting test records – chamber logs, report numbers, sample sizes and pass criteria – should be requested and confirmed before they are relied on in a tender, a specification or a warranty discussion. Where this article describes a test method, it describes the published standard behind the method, not a result we are asserting.

Short answer: the LED display aging test and IP66 water spray test are the claims buyers ask about most, and both are only worth anything if the result is documented. The purpose is straightforward – stress units hard enough that early failures happen in the factory rather than on a facade in month four – but the proof is a record, not a brochure sentence. For an IP66 claim the record should show which IEC 60529 water condition was applied and the nozzle, flow, pressure, distance and duration used. For aging it should show the standard, the temperature profile, the duration, the sample and the pass criteria.

Why aging exists: catching the failure before the customer does

Electronics fail in a characteristic pattern: a small proportion immediately, a small proportion at end of life, and most after years in between. The early cluster is called infant mortality, and it is dominated by manufacturing defects rather than wear – a marginal solder joint, a power supply component at the edge of tolerance, a connector not fully seated.

Aging is the deliberate compression of that early period. Units run continuously for a defined time, usually with temperature stress, while the operator watches for the symptoms those defects produce: brightness variation between modules, dead or stuck pixels, flicker, abnormal power supply temperature, intermittent signal. Effective screening finds the defective units before packing; ineffective screening lets the customer find them.

What our website currently states

Our website currently states that panels pass a 48-hour high and low temperature aging cycle, a 72-hour continuous burn-in, and IP66 water-spray validation before leaving the facility. Those are three claims with three different evidentiary needs.

Published statement	What would substantiate it	Status
48-hour high/low temperature aging cycle	Chamber log with date, model, serial or batch, temperature profile, duration, sample count, observations and result	Current website statement; records to be requested and confirmed
72-hour continuous burn-in	Definition of the test pattern and brightness setting, the observation list, the failure criteria, and records for the units concerned	Current website statement; records to be requested and confirmed
IP66 water-spray validation	Ingress report naming IEC 60529, the two digits, and the nozzle, flow, pressure, distance and duration applied, with the post-test inspection result	Current website statement; records to be requested and confirmed
“Every panel”	Per-unit records linkable by serial number and samplable by the buyer	Scope to be confirmed; a type test on a sample is a different claim from per-unit screening

Two clarifications matter here. A type test on a sample shows the design can pass; it does not show that each unit was tested. And a test performed to a standard’s method is not a certification by that standards body – IEC publishes methods and does not issue product certificates, so a report should come from a laboratory, with a number and a date.

What an IP66 water-spray test actually involves

The IP code is defined in IEC 60529, and the second digit describes water. IP66 means dust-tight plus protection against powerful water jets. The test is not a general “wet it and see” exercise; the standard specifies the apparatus and the exposure.

• Nozzle: 12.5 mm internal diameter for the IPX6 jet
• Flow rate: 100 litres per minute
• Pressure: 100 kPa at the nozzle
• Distance: 3 metres from the enclosure surface
• Duration: at least 3 minutes, calculated as 1 minute per square metre of enclosure surface

The IPX5 jet behind an IP65 rating uses a 6.3 mm nozzle at 12.5 litres per minute and 30 kPa. The pass criterion in both cases is the same – no harmful ingress – and the report should define what counts as harmful, including whether the unit still functioned afterwards.

Two limits belong in the same conversation. The IP water tests use fresh water, so salt spray, cleaning chemicals and fuel are outside the rating entirely. And the water digits are not cumulative: a unit rated for immersion is not thereby rated for jets.

What low-temperature aging is testing

Cold exposure is covered by IEC 60068-2-1, which sets out test methods for components and equipment at low temperature and distinguishes operating from non-operating (storage and transport) conditions. The distinction matters because the failure modes differ: a unit powered cold stresses the power supply and any gasket that stiffens, while a unit stored cold and then powered stresses thermal expansion and connector seating.

For a display, the observations worth recording are start-up behaviour, delayed or uneven illumination, colour shift and whether condensation formed as the unit returned to room temperature – a common real-world failure that only appears if the recovery phase is observed.

What damp heat is testing, and what it is not

IEC 60068-2-78 covers steady-state damp heat: a constant elevated temperature and high relative humidity, expressly without condensation on the specimen. Its purpose is to evaluate long-term resistance to humid environments – corrosion, insulation resistance, material swelling, connector degradation – over a defined exposure period.

It is not a condensation test. Condensing conditions are addressed by a different method, and mixing the two in a specification produces a report that does not answer the site’s question. If the installation is a window cavity where the glass runs cold at night, specify the condensation case explicitly.

Why 48 and 72 hours are company decisions, not standards

Neither IEC 60068 nor IEC 60529 mandates a 48-hour aging cycle or a 72-hour burn-in for commercial displays. Those durations are screening parameters chosen by the manufacturer, set by experience and production capacity. The standards define how to run a temperature or damp heat test; they do not define how long a factory should burn in its product.

That is not a criticism of the practice – a well-designed screen is genuinely useful – but the duration alone tells you little. What makes screening effective is the pass criterion and the record. A 72-hour burn-in with no defined pattern is a power bill; a 48-hour cycle with a temperature profile, a serial-numbered log and a documented rejection rule is a quality system.

What a credible record looks like

1. The standard and edition referenced, and whether the test followed it or was adapted
2. Product model, and the serial numbers or batch covered
3. Sample size, and whether it was a type test or per-unit screening
4. Temperature and humidity profile over time, not just the endpoints
5. Duration, and what happened during it (powered, cycling, pattern displayed)
6. The pass criteria, written before the test rather than after
7. The results, including failures and what was done with the failed units
8. Date, operator and laboratory, with the report number and any accreditation

What we can document today, and what we are still assembling

Being explicit is more useful to a buyer than another adjective: the engineering description above comes from published standards, while the paperwork behind each commercial claim varies. Ask for the LED display aging test and IP66 water spray test records as a set rather than as a verbal assurance.

• Test method descriptions: available, as set out in this article.
• Configuration-specific ingress reports: to be requested for the exact model; confirm before relying on the rating in a specification.
• Chamber logs for aging and burn-in: to be requested, together with sample size and pass criteria.
• Per-unit records supporting an “every panel” statement: scope to be confirmed, and sampling should be agreed in the purchase contract.
• Third-party laboratory reports: to be confirmed per model; where a report exists, its number should appear in the quotation.

We would rather state this plainly than let a buyer discover it during an audit. If a project needs a document that is not yet available, the honest answer at that moment is that it is not yet available.

Questions to ask any supplier, including us

• Was this unit type-tested on a sample, or screened individually? Show me the record type.
• Which IEC 60529 water condition was applied, and what were the nozzle, flow, pressure and duration?
• What was the burn-in test pattern and brightness setting, and what were you watching for?
• What is the pass criterion, and how many units failed the last production run?
• Can I sample five records by serial number during a pre-shipment inspection?

Where this applies in the VISLAT range

These claims matter most on products that face weather, which is why the discussion belongs with the outdoor full-lamination range and with specific models such as the IP66 single-panel outdoor display. The product overview shows the six lines the process covers. Ask for documents per model and per configuration, because a report covering a different cabinet is not evidence for the unit on the purchase order.

Frequently asked questions

What does your 48-hour aging test involve?

Per our current website statement, panels pass a 48-hour high and low temperature aging cycle before shipment, and the method would follow the IEC 60068-2-1 approach to low-temperature testing. The chamber log, sample size and pass criteria should be requested and confirmed; they are not published, and this article does not assert them as verified.

Is the IP66 claim third-party tested?

Confirm it for the specific model rather than assuming. IP66 corresponds to the IPX6 jet condition in IEC 60529 – 12.5 mm nozzle, 100 litres per minute, 100 kPa, 3 metres – and a report should name the laboratory, the configuration tested and the result.

Can I see a test report before ordering?

Ask at quotation stage and specify which documents you need: the ingress report, the aging records and any climatic test reports. If a document is not available for the model you are considering, that is worth knowing before the order rather than after.

Do you test every unit or a sample?

The website statement refers to every panel, which implies per-unit screening – and that needs per-unit records to be meaningful. Confirm the scope in writing and, if the claim matters to your project, ask to sample records by serial number at pre-shipment inspection.

What is burn-in actually for?

It is a screening step: running a unit continuously exposes manufacturing defects that would otherwise fail in the first weeks of service. Its value depends on the pass criteria and the record, not the hours alone.

Which standards do you test to?

The relevant published references are IEC 60529 for the enclosure rating, IEC 60068-2-1 for cold and IEC 60068-2-78 for steady-state damp heat. Note that IEC 60068-2-78 is non-condensing; if your site produces condensation, that is a separate test and should be specified separately.

If you need the test documentation package for a specific model, request a project consultation and list the documents you require. Where a record exists it should be sent; where it does not, we will say so.