SECTION B: Fan Testing Instrument Technical Specifications
Manufacturer
Long Win Science & Technology Corporation
Model Number
LW-9266
Air Flow Rate
2.4 – 250 CFM
Accuracy of Air Flow Rage
< 3.5% INFS
Repeatability error
< 2%
Static pressure
0-20mmAq (100mmAq with the high static pressure throttle device)
Overall Dimensions
0.7 (W) x 2.2 (L) x 1.6 (H) m
Power Source
220VAC, 5A, Single Phase, 50/60Hz
Based on Standards
ISO 5801-2007, AMCA 210-0, ASHRAE 51-2007, IEC 61591-2005, GB/T 1236-200
SECTION C: PHI Performance Levels
Pressure at 25dBA
P (mmAq)
0.81
Airflow at 25dBA
Q (CFM)
46.15
SECTION D: Information about DUT
Product Identification Details
Brand
be quiet!
Model
Light Wings Reverse 140mm PWM White
Serial Number
4260052192900
Product Specifications
Manufacturer
Bearing
Rifle
Connector
PWM
Cable length (mm)
490
Daisy-chain
None
RGB Connector
None
RGB Daisy-chain
None
Cybenetics
Max Speed (RPM)
1372
Max Airflow (CFM)
56.81
Max Static Pressure (mmAq)
1.15
Max Fan Noise Level (dBA)
29.20
Fan Max Current (A)
0.08
Fan Weight (gr)
238
Dimensions (W x H x D)
140mm x 140mm x 26mm
Cybenetics Testing Information
Lab ID
BQ14000171
Date of receipt
Mar 17, 2025
Testing Date
Mar 31, 2025
Report Issued Date
Apr 2, 2025
Engineer Name
Georgios Theodoros Sarimpalas
SECTION E: Long Win LW-9266 - Pressure and Airflow
PQ Chart All Speed
PQ Chart 10% Speed
PQ Chart 20% Speed
PQ Chart 30% Speed
PQ Chart 40% Speed
PQ Chart 50% Speed
PQ Chart 60% Speed
PQ Chart 70% Speed
PQ Chart 80% Speed
PQ Chart 90% Speed
PQ Chart 100% Speed
SECTION F: General Performance
Fan Percentage RPM LongWin
Fan Percentage CFM
Fan Percentage Pressure
Fan Percentage Power
Fan Percentage Amps
Fan Percentage Noise
Fan Speed Noise
Fan Noise Speed
SECTION G: Uncertainty
Fan Performance - Static Pressure
The Fan Static Pressure Measurement’s Uncertainty is ±0.68 Pa
The reported expanded uncertainty (U) was derived as the product of the combined standard uncertainty (u) and the coverage factor k = 2, corresponding to a confidence interval of approximately 95%. Measurement uncertainty was determined in accordance with JCGM Guide 100:2008, "Guide to the Expression of Uncertainty in Measurements". The estimate of the reported uncertainty pertains to values obtained during the measurements and does not account for possible long-term changes.
Static Pressure Uncertainty Budget
Source of Uncertainty
Standard Uncertainty, u(xi) (Pa)
LW-9266 Instrument Accuracy
0.260
Repeatability
0.075
Calibration
0.012
Temperature influence
0.208
Relative Combined Standard Uncertainty (RSS):
0.34
% Expanded Uncertainty U (k=2, norm):
0.68
Fan Performance - Airflow
The Fan Airflow Measurement’s Uncertainty is ±3.94 CFM
The reported expanded uncertainty (U) was derived as the product of the combined standard uncertainty (u) and the coverage factor k = 2, corresponding to a confidence interval of approximately 95%. Measurement uncertainty was determined in accordance with JCGM Guide 100:2008, "Guide to the Expression of Uncertainty in Measurements". The estimate of the reported uncertainty pertains to values obtained during the measurements and does not account for possible long-term changes.
Fan Airflow Uncertainty Budget
Source of Uncertainty
Standard Uncertainty, u(xi) (CFM)
Repeatability
1.750
LW-9266 calibration
0.600
Environmental variation
0.500
Position error
0.482
Relative Combined Standard Uncertainty (RSS):
1.97
% Expanded Uncertainty U (k=2, norm):
3.94
be quiet! Light Wings Reverse 140mm PWM White
Front
Rear
ybenetics bietet die freiwilligen ETA- und Lambda-Zertifizierungsprogramme an, mit denen effiziente und leise Netzteile (PSU) beworben werden
