ETENWOLF T300 Digital Tire Gauge Thermal Shock Test Report (−20 °C / 54 °C, 72 h Cycling)

Document Overview

Key Findings The ETENWOLF T300 Digital Tire Gauge successfully passed a 72-hour thermal shock cycling test across −20 °C and 54 °C extremes, with no appearance defects or functional abnormalities detected during or after the test. Product: T300 Digital Tire Gauge Test Type: Thermal Shock…

Document type: Test Report
Prepared by: Kevin Marshall
Published: July 21, 2026
Last reviewed: July 21, 2026
Topics: Environmental Testing

Key Findings

The ETENWOLF T300 Digital Tire Gauge successfully passed a 72-hour thermal shock cycling test across −20 °C and 54 °C extremes, with no appearance defects or functional abnormalities detected during or after the test.

Product: T300 Digital Tire Gauge
Test Type: Thermal Shock (Cold/Hot Impact) — Environmental Testing
Report No.: 2024112501
Test Dates: 2024-11-21 to 2024-11-24
High Temperature: 54 °C, 80% RH, 2 h per half-cycle
Low Temperature: −20 °C, 2 h per half-cycle
Total Duration: 72 h cycling storage
Sample Size: 3 pcs
Verdict: Pass

Test Overview

Field	Details
Test Type	Thermal Shock Test (Cold/Hot Impact — 冷热冲击测试)
Report No.	2024112501
Page	1
Test Dates	2024-11-21 to 2024-11-24
Product Name	T300 Digital Tire Gauge (T300胎压计)
Manufacturer	BTK
Surface Treatment	/
Sample Quantity	3 pcs
Test Reason	■ New Product
Test Purpose	To evaluate the durability of the prototype during storage in extreme temperature environments (评估样机在极端温度的环境下储存的耐久性)
Laboratory Environment	Temperature: 24 °C; Humidity: 45% RH

Test Equipment & Setup

Item	Details
Instrument Name	Constant Temperature and Humidity Testing Machine (恒温恒湿试验机)
Test Condition 2.1 — High Temperature	54 °C, Humidity 80% RH, duration 2 h
Test Condition 2.2 — Low Temperature	−20 °C, duration 2 h
Test Condition 2.3 — Total Cycling Duration	72 h cumulative cycling storage
Test Condition 2.4 — Functional Check Interval	Function checked every 8 hours of storage
Test Requirement	After testing, product function must show no abnormalities (测试后，功能无异常)
Test Level / Class	— (not specified)

Test Procedure

Pre-Test: Verify laboratory environment conditions (24 °C ambient, 45% RH). Inspect all 3 sample units for appearance. Confirm instrument calibration on the constant temperature and humidity testing machine. Document pre-test appearance photographs and baseline functional readings (30 psi accuracy check OK; 80 psi accuracy check OK).
Cycle Setup: Program the testing machine with alternating half-cycles: High temperature phase — 54 °C at 80% RH for 2 h; Low temperature phase — −20 °C for 2 h.
Cycling Execution: Run continuous thermal shock cycles for a total accumulated storage duration of 72 h.
Interim Functional Checks: Every 8 hours of storage, remove samples and perform functional verification. Check display operation, pressure measurement accuracy (30 psi and 80 psi reference points), and overall unit response. Return samples to the chamber and resume cycling.
Post-Test Inspection: After 72 h total cycling, remove all 3 samples. Inspect appearance for cracks, deformation, discoloration, or label damage. Perform full functional test including pressure accuracy at 30 psi and 80 psi.
Acceptance Criteria: No appearance abnormalities and no functional abnormalities during or after the test. Any failure in appearance or function constitutes a Fail result.

Test Data & Results

Check Point	Observation / Result
Pre-test appearance	Normal (documented in pre-test photographs)
Program control	Chamber program executed as configured (program control chart recorded)
Functional status during test	Normal (功能正常)
30 psi accuracy check (during/after cycling)	OK (30psi精度测试OK)
80 psi accuracy check (during/after cycling)	OK (80PSI精度测试OK)
Post-test appearance	No abnormalities (documented in post-test photographs)
Post-test function	No abnormalities (结果：测试时和测试后，检查产品外观和功能无异常)

Observation: During the entire 72-hour thermal shock cycling test and upon completion, inspection of all 3 sample units confirmed that product appearance and function were free from any abnormalities. Pressure accuracy at both 30 psi and 80 psi reference points remained within acceptable limits throughout the test.

Conclusion

Field	Details
Overall Result	■ Pass (合格)
Fail	☐ Not applicable
Reference Only	☐ Not applicable
Test Conditions	High: 54 °C / 80% RH / 2 h per half-cycle; Low: −20 °C / 2 h per half-cycle; Total: 72 h cycling
Samples Tested	3 pcs — T300 Digital Tire Gauge
Requirement	No appearance or functional abnormalities after test
Verdict	All 3 samples passed. No appearance defects or functional abnormalities were observed during or after the 72-hour thermal shock cycling test.

Document Information

Role	Name
Approval (核准)	—
Review / Check (审查)	Mai Shaoqiang (麦少强)
Tester (试验人)	Zhang Ronggui (张荣贵)
Form Number (表单编号)	BTK-R-Q-087A/1

Frequently Asked Questions

What temperatures were used in the T300 thermal shock test?

The T300 Digital Tire Gauge was subjected to alternating cycles between −20 °C (low temperature phase, 2 h) and 54 °C at 80% RH (high temperature phase, 2 h) for a total cumulative storage duration of 72 hours. This simulates extreme cold and hot storage environments the product may encounter during transport and use.

Did the T300 tire gauge pass the thermal shock test?

Yes. All 3 sample units passed the thermal shock test. Inspection during and after the 72-hour cycling confirmed no appearance defects and no functional abnormalities. Pressure accuracy at both 30 psi and 80 psi reference points remained normal throughout.

How often was the T300 functionally checked during thermal shock cycling?

Functional checks were performed every 8 hours of accumulated storage during the thermal shock cycling. Each check verified display operation and pressure measurement accuracy at 30 psi and 80 psi. All interim checks returned normal results.

What standard or requirement governs the T300 thermal shock test?

The test requirement specified that after the full 72-hour thermal shock cycling, the product must show no functional abnormalities (测试后，功能无异常). The test was conducted using a calibrated constant temperature and humidity testing machine under controlled laboratory conditions (24 °C ambient, 45% RH). The T300 met this requirement across all 3 samples.

Pressure & Measurement