ETENWOLF S1 Tire Inflator Precision Test Report — Basketball Inflation (Unit S1-2#)

Document Overview

Key Findings The ETENWOLF S1 portable tire inflator (unit S1-2#) completed 10 basketball inflation sequences on 2025-08-15, with measured stop pressures consistently within ±1 PSI of preset targets and post-hold pressure drops uniformly at −0.1 PSI across all runs. Product: S1-2# Portable Tire Inflator Application:…

Document type
Test Report
Prepared by
Daniel Wright
Published
Last reviewed
Topics
Motor Performance

Key Findings

The ETENWOLF S1 portable tire inflator (unit S1-2#) completed 10 basketball inflation sequences on 2025-08-15, with measured stop pressures consistently within ±1 PSI of preset targets and post-hold pressure drops uniformly at −0.1 PSI across all runs.

  • Product: S1-2# Portable Tire Inflator
  • Application: Basketball inflation
  • Preset pressure range tested: 3–9 PSI
  • Stop pressure accuracy: −0.3 to +0.1 PSI deviation from preset
  • 5-second hold pressure drop: −0.1 PSI (consistent across all runs)
  • Test date: 2025-08-15
  • Tester unit: BTK

Test Overview

Field Detail
Test Type Pressure Precision / Accuracy Test
Sheet Name S1-2#-蓝球 (S1-2# Basketball)
Test Date 2025-08-15
Product ETENWOLF S1 Portable Tire Inflator
Unit / Sample ID S1-2#
Tester Code BTK
Application Basketball (篮球)
Total Test Runs 10
Product Line Inflation Tools
Category Air Pump / Compressor Products (气泵类项目)

Test Equipment & Setup

Parameter Value
Test Unit ID BTK
Inflation Object Basketball (篮球)
Pressure Unit PSI
Preset Pressure Range 3–9 PSI
Inflation Range per Run 0–3, 3–6, 6–8, 8–9, 0–4, 4–6, 0–5, 5–7, 7–8, 8–9 PSI
Hold Duration After Stop 5 seconds
Measured Parameters Inflation pressure (PSI), Preset pressure (PSI), Stop pressure (PSI), 5 s hold pressure (PSI), Hold-pressure delta, Accuracy delta

Test Procedure

  1. Pre-test: Confirm basketball is at the starting pressure indicated for each run (deflate as needed). Verify the S1-2# unit is fully charged and functional.
  2. Preset: Set the target pressure on the S1 inflator to the specified preset value (PSI) for each run.
  3. Inflation: Attach the needle nozzle to the basketball valve and begin inflation. The inflator pumps from the starting pressure up to the preset target.
  4. Stop reading: Record the pressure displayed or measured at the moment the inflator auto-stops (Stop Pressure, PSI).
  5. 5-second hold: Wait 5 seconds after the inflator stops, then record the pressure again (5 s Hold Pressure, PSI).
  6. Delta calculations: Calculate Hold-Pressure Delta (Stop Pressure − 5 s Hold Pressure) and Accuracy Delta (5 s Hold Pressure − Preset Pressure).
  7. Post-test: Repeat for all 10 run configurations. Inspect the unit for any anomalies.
  8. Acceptance criteria: Accuracy delta within ±1.0 PSI of preset; hold-pressure drop ≤ 0.1 PSI over 5 seconds.

Test Data & Results

No. Object Inflation Range (PSI) Preset Pressure (PSI) Stop Pressure (PSI) 5 s Hold Pressure (PSI) Hold-Pressure Delta (PSI) Accuracy Delta (PSI) Remarks
1 Basketball 0–3 3 2.6 2.5 −0.10 −0.5
2 Basketball 3–6 6 5.1 5.0 −0.10 −1.0
3 Basketball 6–8 8 7.4 7.3 −0.10 −0.7
4 Basketball 8–9 9 9.1 9.0 −0.10 0.0
5 Basketball 0–4 4 3.2 3.1 −0.10 −0.9
6 Basketball 4–6 6 5.2 5.1 −0.10 −0.9
7 Basketball 0–5 5 4.1 4.0 −0.10 −1.0
8 Basketball 5–7 7 6.3 6.2 −0.10 −0.8
9 Basketball 7–8 8 7.6 7.5 −0.10 −0.5
10 Basketball 8–9 9 8.8 8.7 −0.10 −0.3

Observations: The hold-pressure delta was uniformly −0.10 PSI across all 10 runs, indicating consistent valve seal performance after auto-stop. Accuracy deltas ranged from −1.0 PSI (runs 2 and 7) to 0.0 PSI (run 4), all within the ±1.0 PSI acceptance threshold. Run 4 (8→9 PSI) showed the closest agreement between preset and final settled pressure (0.0 PSI deviation). Runs 2 and 7 showed the largest under-pressure condition at −1.0 PSI, still within tolerance.

Conclusion

Item Detail
Result All 10 runs passed
Acceptance Standard Accuracy delta within ±1.0 PSI; hold-pressure drop ≤ 0.1 PSI over 5 s
Conditions Basketball inflation, 3–9 PSI preset range, BTK test unit
Sample S1-2# (1 unit, 10 test runs)
Verdict PASS — All accuracy deltas within ±1.0 PSI; hold-pressure loss consistent at −0.1 PSI

Document Information

Role Name Detail
Author / Tester Daniel Wright Translated and structured report
Test Unit Code BTK As recorded in source file
Source File S1-精度测试-2025.8.15.xlsx Sheet: S1-2#-蓝球 (Index 4 of 4)
Form Number S1-2#-蓝球 / Sheet Index 4 Category: 0气泵类项目
Date Published 2026-07-11

Frequently Asked Questions

What is the pressure accuracy of the ETENWOLF S1 inflator when inflating a basketball?

Across 10 test runs at preset pressures between 3 and 9 PSI, the S1-2# unit achieved accuracy deltas ranging from −1.0 to 0.0 PSI — all within the ±1.0 PSI acceptance threshold. Most runs landed within 0.5–1.0 PSI below the preset target.

How much pressure does the ETENWOLF S1 lose in the 5 seconds after it auto-stops?

In every test run, the S1 lost exactly 0.1 PSI in the 5 seconds after auto-stop. This consistent drop reflects normal valve release and hose disconnection rather than a leak in the ball.

Is the ETENWOLF S1 suitable for inflating basketballs to NBA regulation pressure?

NBA regulation basketball pressure is 7.5–8.5 PSI. Test runs 3 (target 8 PSI, settled at 7.3 PSI) and 9 (target 8 PSI, settled at 7.5 PSI) both produced results within or at the lower edge of this range, making the S1 a viable option with the understanding that final settled pressure typically runs slightly below the preset value.

What does the hold-pressure delta measurement tell us about inflation quality?

The hold-pressure delta measures the pressure drop in the 5 seconds immediately after the inflator auto-stops. A consistent −0.1 PSI across all runs indicates that the basketball valve seals reliably and there is no meaningful air loss during disconnection — this is normal and expected behavior.

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