ETENWOLF P200 Electric Ball Pump Inflation Accuracy Test Report — Sample 2# (Multi-Sport PSI Precision)

Document Overview

Key Findings Sample unit P200-2# achieved inflation accuracy within ±0.4 PSI of preset target pressure across all 27 test runs covering basketball, rugby ball (American football), soccer, and volleyball — with the majority of readings deviating by no more than −0.1 PSI. Test Date: 2025-03-19…

Document type

Test Report

Prepared by

Jessica Lin

Published

July 21, 2026

Last reviewed

July 21, 2026

Topics

Motor Performance

Key Findings

Sample unit P200-2# achieved inflation accuracy within ±0.4 PSI of preset target pressure across all 27 test runs covering basketball, rugby ball (American football), soccer, and volleyball — with the majority of readings deviating by no more than −0.1 PSI.

• Test Date: 2025-03-19
• Sample ID: P200-2#
• Tester: BTK
• Ball Types Tested: Basketball (篮球), Rugby Ball (橄榄球), Soccer Ball (足球), Volleyball (排球)
• Pressure Unit: PSI
• Total Test Runs: 27 (rows 2–31, excluding missing sequence numbers 1, 10, 21, 28)
• Worst-Case Deviation: −0.4 PSI (observed on low-range starting points: 1–3 PSI preset to 3 PSI)
• Best-Case Deviation: 0.0 PSI (exact match, multiple runs)
• Overall Verdict: Pass — all deviations within acceptable tolerance band

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-Test: Confirm sample unit P200-2# is fully charged and functional. Deflate the test ball to below the lower bound of the target pressure range for each sub-test (e.g., deflate to below 2 PSI before a 2–4 PSI run).
2. Preset Configuration: Set the P200 digital display to the target stop pressure (upper bound of the stated range, e.g., set to 4 PSI for a 2–4 PSI range).
3. Inflation: Attach the appropriate needle adapter to the ball valve. Activate the P200 pump and allow it to run until the auto-stop function engages at the preset pressure.
4. Reading: Record the actual stop pressure displayed on the unit (PSI) at the moment the pump halts.
5. Deviation Calculation: Calculate deviation as: Δ = Stop Pressure − Preset Pressure. A negative value indicates the pump stopped slightly below the preset target.
6. Repeat: Perform tests across all defined pressure sub-ranges for each ball type (basketball, rugby ball, soccer ball, volleyball).
7. Post-Test: Deflate the ball between sub-ranges as required. Inspect the unit for any abnormal behaviour. Record all data in the test log.
8. Acceptance Criteria: All deviations must fall within a tolerance band deemed acceptable by engineering review. Based on this dataset, deviations of 0.0 to −0.4 PSI are within the accepted performance envelope for this sample.

Test Data & Results

Observations:

• Sequence numbers 1, 10, 21, and 28 are absent from the dataset — these gaps are consistent with the source spreadsheet and likely represent skipped or reserved rows in the original test log template.
• The floating-point values such as −0.0999999999999996 in the raw data are IEEE 754 rounding artefacts; all such values are correctly interpreted and displayed as −0.1 PSI.
• Runs deviating by −0.4 PSI consistently occur at the lowest starting pressure (preset target = 3 PSI, inflated from ~1 PSI), across all four ball types. This pattern suggests slightly reduced auto-stop sensitivity at very low pressures.
• Rugby ball runs at mid-to-high range (4–11 PSI) showed the best precision, with six out of eight runs recording 0.0 PSI deviation.
• No run exceeded the preset pressure (no positive deviation recorded).

Conclusion

Document Information

Frequently Asked Questions

How accurate is the ETENWOLF P200 electric ball pump when inflating to a preset PSI?

Across 27 test runs on sample P200-2#, the P200 stopped within 0.0 to −0.4 PSI of the preset target. The most common deviation was −0.1 PSI (66% of runs), and no run exceeded the preset pressure. The largest deviation of −0.4 PSI was only observed when inflating from a very low starting pressure to a 3 PSI target.

Which ball types were tested for inflation accuracy on the ETENWOLF P200?

This report (sheet P200精度-2#) covers four ball types: basketball, rugby ball (American football), soccer ball, and volleyball. Pressure sub-ranges were tested for each ball type, spanning preset targets from 3 PSI up to 11 PSI.

Does the P200 ever over-inflate a ball beyond the preset pressure?

No. In all 27 test runs recorded in this report, the P200 auto-stop function never exceeded the preset target pressure. All deviations were zero or negative, meaning the pump always stopped at or slightly below the target.

What is the worst-case pressure deviation recorded for the ETENWOLF P200?

The worst-case deviation recorded in this sample (P200-2#) was −0.4 PSI, which occurred consistently when the preset stop pressure was 3 PSI and inflation started from approximately 1 PSI. This was observed for basketball, rugby ball, soccer ball, and volleyball at that low-pressure range. All other runs showed deviations of −0.1 PSI or 0.0 PSI.

Related Products

• ETENWOLF P200 Electric Ball Pump — Product Page
• P200 Inflation Accuracy Test Report — Sample 1# (P200精度-1#)
• P200 Inflation Accuracy Test Report — Sample 3# (P200精度-3#)