Cooler Master MasterFan A120FC (Low Speed)

Serial NumberMFZP2NA40NPKR11261800168

Lab IDCM12000239

Certification IDFN25239

Test Result Report ID: 26FN239A
Certificate Issue Date: May 29, 2026

Scheme: PHI

Airflow Rating

Static Pressure Rating

Aristeidis Bitziopoulos, Certification Body General Manager

SECTION A: Noise Testing Equipment

Test Environment	Hemi-Anechoic Chamber with 6 dB(A) noise floor
Conditions	25(±2) degrees Celsius, 40-50% humidity
Sound Analyzer	Bruel & Kjaer 2270-S G4 & 2250-L G4
Microphone	Bruel & Kjaer Type 4955-A
Mic Calibrator	Bruel & Kjaer Type 4231
Data Logger	Picoscope TC-08
Testing Methodology	Cybenetics Phi Fan Performance Standard

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)	2.67
Airflow at 25dBA	Q (CFM)	50.38

SECTION D: Information about DUT

Product Identification Details
Brand	Cooler Master
Model	MasterFan A120FC (Low Speed)
Serial Number	MFZP2NA40NPKR11261800168
Product Specifications
Manufacturer
Bearing	Two Ball
Connector	PWM
Cable length (mm)	75
Daisy-chain	Cable
RGB Connector	None
RGB Daisy-chain	None
Cybenetics
Max Speed (RPM)	2542
Max Airflow (CFM)	76.85
Max Static Pressure (mmAq)	5.77
Max Fan Noise Level (dBA)	37.50
Fan Max Current (A)	0
Fan Weight (gr)	316
Dimensions (W x H x D)	120mm x 120mm x 30mm
Cybenetics Testing Information
Lab ID	CM12000239
Date of receipt	May 25, 2026
Testing Date	May 28, 2026
Report Issued Date	May 29, 2026
Engineer Name	Ioannis Kalyviotis
Authorized By the Laboratory Technical Manager	Aristeidis Bitziopoulos
Signature

SECTION E: Long Win LW-9266 - Pressure and Airflow

PQ Chart All 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

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(x_i) (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(x_i) (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

Cooler Master MasterFan A120FC (Low Speed)

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