UL-2908:2017 pdf free download – Environmental Claim V alidation Procedure (ECVP) for Determining Particle Removal for Non-Filter Electrical Appliances.
COMPLIANCE, EVALUATION AND ASSESSMENT CRITERIA
5 Particle Removal Testing
5.1 Particle used for testing
5.1.1 Particle to be measured shall be cigarette smoke, which include target sized particles.
5.2 Instrument
5.2.1 For weight concentration (mg/rn3) measurement, the measuring instrument shall be a light scattering type or a Piezobalance type, which shall be capable of measurement of the target sized particles of 0.1, 0.3, 0.5 and 1.0 jm.
5.2.2 For particle count concentration (particles/rn3), the measuring instrument such as Scanning Mobility Particle Sizer (SMPS), which shall be capable of measurement of the target sized particles.
5.3 Test room
5.31 The test room shall be 20 to 32 m3. A test room larger than 32 m3 may be used if it is available and considered appropriate for the product to be tested (i.e. same as or close to Effective/Recommended room size for the product). The measurement chamber must be closed so that the particle concentration after 30 minutes has passed can be at least 80% of the particle concentration at the start of measurement.
5.3.2 The installation position of the object for testing depends on the position specified in the product instruction manual. If not described in the instruction manual, as shown in Figure 0.1 of the Standard for Air Cleaners of Household and Similar Use. JEM 1467-201 3. the table top type are placed on the table of about 70 cm height, close to the wall and at the center in the depth direction in Figure C.1 of JEM 1467-2013.
5.3.3 Floor mount type shall be on the floor close to the wall. Wall hanging type shall be placed as the bottom surface is 180 cm above the floor. In either case, put it in the center in the depth direction of Figure 0.1 of the Standard for Air Cleaners of Household and Similar Use. JEM 1467-2013.
5.3.4 The position for measuring the particle concentration shall be 120 cm above the floor in the center of the room.
5.3.5 When placing a particle concentration measuring instrument in the test room, do not disturb the air flow.
6 Test Procedure
6.1 Particle concentration measurement
6.1.1 Particle concentration is measured by the following in the test room specified in 5.3.
6.2 Natural decay measurement
6.2.1 Target sized air borne particles are generated using a particle dosing instrument, and distributed uniformly in the test room using a circulator. When reaching to appropriate particle concentration (the appropriate particle concentration depends on the measurement equipment used), switch off the particle dosing instrument and circulator. Then, the particle concentration is measured for the specified operating duration (t). See the Figure 6.1.