Document Overview
Key Findings The ETENWOLF HB3 bare-unit hair dryer successfully passed 72 cycles of high/low temperature storage testing across the full range of −20 °C to 60 °C, with all 3 samples showing no surface discoloration, no deformation, and normal power on/off operation after testing. Product:…
- Document type
- Test Report
- Prepared by
- Alex Newman
- Published
- Last reviewed
- Topics
- Environmental Testing
Key Findings
The ETENWOLF HB3 bare-unit hair dryer successfully passed 72 cycles of high/low temperature storage testing across the full range of −20 °C to 60 °C, with all 3 samples showing no surface discoloration, no deformation, and normal power on/off operation after testing.
- Product: HB3 Bare Unit (裸机)
- Manufacturer: BTK
- Sample Quantity: 3 PCS
- Test Cycles: 72 cycles total
- Low Temperature: −20 °C / 2 hours per cycle
- High Temperature: 60 °C / 2 hours per cycle
- Electrical Specification: OK
- Structural Feature: OK
- Overall Verdict: Pass
Test Overview
| Field | Detail |
|---|---|
| Test Type | High and Low Temperature Cycle Storage Test (高低度循环试验) |
| Report Number | 2025053001 |
| Test Date | 2025-05-27 to 2025-05-30 |
| Page | 1 |
| Product Name | HB3 Bare Unit (HB3裸机) |
| Manufacturer | BTK |
| Surface Treatment | / |
| Sample Quantity | 3 PCS |
| Test Class / Level | / |
| Test Reason | Other (■其它) — not new product, engineering change, periodic verification, or quality anomaly |
| Test Purpose | To verify the reliability of samples stored in high-temperature and low-temperature environments, simulating use under extreme conditions |
| Laboratory Environment | Temperature: 22 °C; Humidity: 55% RH |
Test Equipment & Setup
| Item | Detail |
|---|---|
| Instrument Name | Constant Temperature & Humidity Testing Machine (恒温恒湿试验机) |
| Low Temperature Condition | −20 °C / 2 hours per cycle |
| High Temperature Condition | 60 °C / 2 hours per cycle |
| Total Cycles | 72 cycles |
| Test Requirement | After testing, sample surfaces must show no discoloration or deformation; power on/off operation must function normally |
Test Procedure
- Pre-Test: Record the initial condition of all 3 PCS HB3 bare-unit samples. Photograph samples in their placement configuration inside the test chamber.
- Chamber Setup: Configure the constant temperature and humidity testing machine for alternating cycles: −20 °C for 2 hours followed by 60 °C for 2 hours.
- Cycle Execution: Run the programmed profile for a total of 72 complete cycles. Monitor and document the program control profile (documented via program control charts 1 and 2).
- Post-Test Inspection: Remove samples from the chamber. Inspect all surfaces visually for discoloration, deformation, cracking, or any physical anomaly.
- Functional Verification: Power each sample on and off to confirm normal electrical operation.
- Acceptance Criteria: All samples must exhibit no surface discoloration or deformation AND must power on/off normally to receive a Pass verdict.
Test Data & Results
| Result Category | Characteristic | Result |
|---|---|---|
| Test Results | Electrical Specification (电气特性) | OK |
| Test Results | Structural Feature (结构特性) | OK |
Test Picture Reference: The following photographic documentation was captured during the test:
- Pre-test sample condition photograph
- Sample placement configuration inside the chamber
- Program control chart 1
- Program control chart 2
- Post-test sample condition photograph
Remarks: After testing, all 3 PCS samples showed no surface discoloration or deformation of any kind. Power on/off operation was confirmed normal for all samples.
Conclusion
| Field | Detail |
|---|---|
| Result | Pass (■合格Pass) |
| Test Condition | −20 °C / 2H ↔ 60 °C / 2H, 72 cycles total |
| Samples Tested | 3 PCS HB3 Bare Unit |
| Electrical Verdict | OK — normal power on/off operation confirmed |
| Structural Verdict | OK — no surface discoloration or deformation observed |
| Fail Criteria | Not triggered |
| Reference Criteria | Not applicable |
Document Information
| Role | Name |
|---|---|
| Approval (核准) | — |
| Review (审查) | — |
| Tester (试验人) | Su Yimei (粟仪梅) |
| Form Number (表单编号) | BTK-R-Q-087A/1 |
Frequently Asked Questions
What does the HB3 high/low temperature storage test measure?
The test verifies that the HB3 bare-unit hair dryer can reliably withstand repeated exposure to extreme temperatures during storage and transport. The machine cycles between −20 °C and 60 °C for 2 hours each, repeated 72 times, to simulate conditions the product may encounter in cold warehouses, hot shipping containers, or extreme climate environments. After testing, samples are checked for surface integrity and functional operation.
Did all HB3 samples pass the 72-cycle temperature test?
Yes. All 3 PCS of the HB3 bare unit passed the full 72-cycle test. Post-test inspection confirmed no surface discoloration or deformation on any sample, and power on/off functionality operated normally on all units. The official judgment recorded is Pass (合格).
What temperature range was used in the HB3 storage cycling test?
The test used a range of −20 °C (low temperature) to 60 °C (high temperature), with each phase held for 2 hours before transitioning. This range is designed to simulate extreme real-world storage and transit conditions, from sub-zero cold storage to high-heat environments such as vehicles or outdoor warehouses in summer.
What equipment was used to conduct the HB3 temperature cycling test?
A constant temperature and humidity testing machine (恒温恒湿试验机) was used. The laboratory ambient conditions during testing were 22 °C and 55% RH. The test was conducted by Su Yimei at BTK, with report number 2025053001, covering the period from 2025-05-27 to 2025-05-30.