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Verify ID:


Expiration date:

May 20, 2020 - May 19, 2021

Verification Mark

Applicable To:

ThinkCentre M90A

Marketing Claim Verified by UL

Anti-Dust Protection SILVER

Verification Method

This test program is developing by a new UL standard (UL 8203 - Performance Testing for Ingress of Fibrous Indoor Dust). This test is utilizing a dust chamber capable of simulating floated dust that comprises household fibrous dust and accounted for one year of dust accumulation (i.e., 2 kg). After the test, the following measurements are carried out: (1) ingress of dust (mg), (2) performance degradation (%), (3) noise increment (dB), and (4) touch temperature rise (°C). The measured results that resulted in providing the SILVER rating are as follows: Ingress of dust - 3.66 g Performance degradation - 1% Noise increment - 3.59 dB Touch temperature rise - 2 degC

What is UL Verification?

UL Verification is an objective, science-based assessment that confirms the accuracy of marketing claims. Our independent assessment process scrutinizes the validity of specific advertising or promotional statements, giving you a way to separate verified fact from fiction.