Dusting solar cell modules Test System
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Web: standard-groups.com
Applications
tests according to VDI 3956
temperature-dependent dusting and cleaning tests of other types of samples
Standard
VDI 3956-1
Technical data
| Parameter | Unit | Value |
|---|---|---|
| Air flow velocity | m/s | ≤ 15 |
| Test specimen dimensions | mm | Thickness ≤ 10 |
| Specimen holder | – | Base area 200 × 200 mm; setting angle 0 … 60° (discrete) |
| Test conditions | – | Environmental temperature and relative humidity (controlled) |
| Compressed air supply (operating gas/air) | bar | 6 … 10 (quality class ISO 8573-1:2010 [6:4:2]) |
| Power supply | – | 3 – TN-C-S network/PEN; 400 VAC, 50 Hz |
| Test chamber dimensions | mm | 700 × 720 × 700 |
| Aerosol generation technology | – | Dust disperser SAG 410 |
| Power consumption | W | max. 6000 |
| Noise emission | dB(A) | LpA ≤ 76.7 ± 1.5 |
| Dimensions (W × H × D) | mm | 2107 × 890 × 1647 |
| Weight | kg | approx. 450 (including devices) |
Principle
The test specimen is mounted on a sample holder in an air lock and then drawn into the preconditioned main chamber. The air lock prevents the dust-containing atmosphere from entering the environment. The desired angle of the specimen is set (up to 60° to the horizontal). The environmental scenarios to be investigated are imitated using the following equipment:
- dusting using generator with dual-positionable nozzle
- temperature control of sample holder: with heating mat/cooling unit
- blowing off the sample using a movable air blade
When air is introduced into the chamber by dust dosing, humidification or sample cleaning, a negative pressure must be present in the chamber to prevent the emission of dust into the atmosphere.
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