Customer: Gigabyte
UD850GM
| Electronic Loads |
Chroma 63601-5 x2 |
|
| AC Sources | Chroma 6530, APM SP300VAC4000W-P | |
| Power Analyzers | RS HMC8015 | |
| Oscilloscopes | Picoscope 4444, Siglent SDS2104X PLUS | |
| Sound Analyzer | Bruel & Kjaer 2270 G4 | |
| Microphone | Bruel & Kjaer Type 4955-A | |
| Temperature Logger | Picoscope TC-08 | |
| Tachometer | UNI-T UT372 | |
| Multimeters | Keysight 34465A | |
| UPS | FSP Champ Tower 3kVA, CyberPower OLS3000E 3kVA | |
| Isolation Transformer | 4kVA | |
| Testing Methodology | Cybenetics PSU Test Protocol | |
| Voltage | 115V | 230V |
|---|---|---|
| Efficiency (>1450 Load Combinations) | 89.035% | 91.186% |
| Efficiency Graphs |  |  |
| Average PF (>1450 Load Combinations) | 0.978 | 0.949 |
| Standby Power Consumption | 0.0326W | 0.1541W |
| ErP Lot 3/6 Ready | ✓ | |
| (EU) No 617/2013 Compliance | ✓ | |
| Average Efficiency VSB | 79.700% | 78.014% |
| Voltage | 115V | 230V |
|---|---|---|
| Noise Rating (>1450 Load Combinations) | 33.26dBA | 34.11dBA |
| Noise Graphs |  |  |
| Model Name | Gigabyte |
| Serial Number | SN21443G005516 |
| Comments | NT 115V,230V CL3 πάρθηκε με html στο 2' και 1' αντίστοιχα |
| Date of receipt | Mar 29, 2022 |
| Testing Date | Apr 19, 2021 |
| Report Issued Date | Apr 19, 2022 |
| Engineer Name | 0 |
| Authorized By the Laboratory General Manager | Aristeidis Bitziopoulos |
The Noise Measurement’s Uncertainty is ±1.18 dB. The reported expanded uncertainty is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95%.
The reported noise measurement’s level is the mean of 10 repeated measurements at an environment with a temperature deviation of ±2 degrees Celsius. The uncertainty was estimated according to the method in UKAS Publication M 3003.
| Source of uncertainty | Value ± | Probability distribution | Divisor | Standard uncertainty |
| Calibrator’s calibration | 0.2 dB | Normal | 2 | 0.1 |
| Calibrator’s accuracy | 0.2 dB | Rectangular | √3 | 0.058 |
| Mic Frequency Response | 2 dB | Rectangular | √3 | 0.577 |
| Temperature Variation | 0.04 dB | Rectangular | √3 | 0.012 |
| Operator’s Accuracy | 0.2 dB | Rectangular | √3 | 0.058 |
| Standard uncertainty of mean of 10 repeated readings | Normal | 1 | 0.031 | |
| Combined Standard Uncertainty | Assumed normal | 0.59 dB | ||
| Expanded Uncertainty | Assumed normal (k = 2) | 1.18 dB |
*Here the (±) half-width divided by √3 is used.