What specimens were tested in the ETENWOLF S7-1# pressure accuracy test?

Three specimen types were tested: a 215/55R17 car tire (37 inflation sequences), a 165/70R13 van tire (32 inflation sequences), and a basketball (10 inflation sequences), for a total of 79 sequences.

What is the acceptance criterion for pressure accuracy on the ETENWOLF S7?

The acceptance criterion is an accuracy deviation of ±1.0 PSI or less compared to the preset target pressure. All sequences in this test passed within that band.

What was the worst-case accuracy deviation recorded during the test?

The worst-case accuracy deviation for the car tire was +0.60 PSI (row 9, preset 11 PSI). For the van tire it was −0.50 PSI (rows 47 and 48). For the basketball it was −0.40 PSI (row 8, preset 7 PSI). All values remained within the ±1.0 PSI acceptance band.

How did the 165/70R13 van tire results compare to the 215/55R17 car tire results?

The 165/70R13 van tire showed notably tighter accuracy deviations, mostly within ±0.2 PSI, compared to the 215/55R17 car tire sequences which reached up to ±0.6 PSI at lower preset targets.

What retention pressure drop is considered normal for the ETENWOLF S7?

All retention pressure drops recorded were ≤0.4 PSI, which is consistent with normal valve seating behavior. No anomalous readings or test interruptions were recorded across any specimen.

Which unit and test date does this report cover?

This report covers unit S7-1#, tested on 2025-07-18. The basketball sequences used a 5-second retention hold, while the tire sequences used a 10-second retention hold.

What specimens were tested in the ETENWOLF S7-1# pressure accuracy test?

Three specimen types were tested: a 215/55R17 car tire (37 inflation sequences), a 165/70R13 van tire (32 inflation sequences), and a basketball (10 inflation sequences), for a total of 79 sequences.

What is the acceptance criterion for pressure accuracy on the ETENWOLF S7?

The acceptance criterion is an accuracy deviation of ±1.0 PSI or less compared to the preset target pressure. All sequences in this test passed within that band.

What was the worst-case accuracy deviation recorded during the test?

The worst-case accuracy deviation for the car tire was +0.60 PSI (row 9, preset 11 PSI). For the van tire it was −0.50 PSI (rows 47 and 48). For the basketball it was −0.40 PSI (row 8, preset 7 PSI). All values remained within the ±1.0 PSI acceptance band.

How did the 165/70R13 van tire results compare to the 215/55R17 car tire results?

The 165/70R13 van tire showed notably tighter accuracy deviations, mostly within ±0.2 PSI, compared to the 215/55R17 car tire sequences which reached up to ±0.6 PSI at lower preset targets.

What retention pressure drop is considered normal for the ETENWOLF S7?

All retention pressure drops recorded were ≤0.4 PSI, which is consistent with normal valve seating behavior. No anomalous readings or test interruptions were recorded across any specimen.

Which unit and test date does this report cover?

This report covers unit S7-1#, tested on 2025-07-18. The basketball sequences used a 5-second retention hold, while the tire sequences used a 10-second retention hold.

ETENWOLF S7 Tire Inflator Pressure Accuracy Test Report — Unit S7-1# (Car Tire, Van Tire & Basketball, 2025-07-18)

Document Overview

Key Findings The ETENWOLF Vortex S7 (unit S7-1#) pressure accuracy test conducted on 2025-07-18 confirms that all measured stop pressures and 10-second hold pressures remain within ±0.6 PSI of the preset target across all tested tire types and basketball inflation sequences. Product: S7-1# (ETENWOLF Vortex…

Document type: Test Report
Prepared by: Daniel Wright
Published: July 27, 2026
Last reviewed: July 27, 2026
Topics: Motor Performance

Key Findings

The ETENWOLF Vortex S7 (unit S7-1#) pressure accuracy test conducted on 2025-07-18 confirms that all measured stop pressures and 10-second hold pressures remain within ±0.6 PSI of the preset target across all tested tire types and basketball inflation sequences.

Product: S7-1# (ETENWOLF Vortex S7 Tire Inflator)
Test date: 2025-07-18
Tester code: BTK
Car tire specimen: 215/55R17 passenger car tire — preset range 10–40 PSI, 37 sequences
Van tire specimen: 165/70R13 van tire — preset range 10–39 PSI, 32 sequences
Basketball specimen: 10 inflation sequences, preset range 3–9 PSI
Maximum observed accuracy deviation (car tire): +0.6 PSI (row 9, 0→11 PSI)
Maximum observed accuracy deviation (van tire): −0.5 PSI (rows 47, 48)
Maximum observed accuracy deviation (basketball): −0.4 PSI (row 8, 5→7 PSI)
Pressure retention drop after 10 s (car/van) / 5 s (basketball): ≤0.4 PSI in all cases
All results fall within the ±1 PSI acceptance band

Test Overview

Field	Detail
Test Type	Pressure Accuracy (精度测试)
Sheet Name	S7-1#-轿车-蓝球 (Sheet 1 of 4)
Report / Source File	S7-精度测试-2025.7.18.xlsx
Test Date	2025-07-18
Product	ETENWOLF Vortex S7 Tire Inflator
Model / Part Number	S7-1#
Manufacturer	ETENWOLF
Product Line	Inflation Tools
Category	Air Pump Products (0气泵类项目)
Tester Code	BTK
Specimens — Car Tire	215/55R17 passenger car tire
Specimens — Van Tire	165/70R13 van tire
Specimens — Ball	Basketball (篮球)
Test Environment	Laboratory ambient (standard indoor conditions)

Test Equipment & Setup

Item	Detail
Device Under Test	ETENWOLF Vortex S7 Tire Inflator, unit S7-1#
Car Tire Test Subject	215/55R17 passenger car tire
Van Tire Test Subject	165/70R13 van (minibus) tire
Ball Test Subject	Standard basketball
Pressure Unit	PSI
Car / Van Tire Preset Range	10 PSI – 40 PSI (incremental 5 PSI steps, multiple start offsets)
Basketball Preset Range	3 PSI – 9 PSI
Retention Hold Time — Car / Van	10 seconds after auto-stop
Retention Hold Time — Basketball	5 seconds after auto-stop
Accuracy Acceptance Band	±1.0 PSI vs. preset target
Retention Acceptance Band	Observed drop recorded; pass if within ±1.0 PSI

Test Procedure

Pre-test: Verify the unit is S7-1#. Record ambient temperature and humidity. Confirm all test tires and basketball are deflated to below the starting pressure of each sequence.
Preset target entry: Set the desired target pressure (PSI) on the S7 digital display for each sequence as listed in the test matrix.
Inflation run: Connect the inflator to the specimen valve. Start inflation from the recorded initial pressure (打气值 lower bound) toward the preset target.
Auto-stop observation: Record the pressure reading at the moment the unit auto-stops (停止气压).
Retention measurement: Wait 10 seconds (car/van tire) or 5 seconds (basketball) after auto-stop, then record the pressure again (停止10s / 停止5s气压).
Deviation calculation — Accuracy (差值精度): Stop pressure minus preset target pressure.
Deviation calculation — Retention (差值保压): Retention pressure minus stop pressure (negative value indicates pressure drop).
Post-test: Deflate specimen back to a level below the next sequence start pressure. Repeat for all rows in the test matrix.
Acceptance criteria: All accuracy deviations must be within ±1.0 PSI of the preset target. All retention deviations are recorded for reference.

Test Data & Results

Results Summary

Test group	Scope	Accuracy	Retention
Car tire	37 sequences; 10–40 PSI	Maximum deviation +0.6 PSI	Drop ≤0.4 PSI
Van tire	32 sequences; 10–39 PSI	Maximum deviation −0.5 PSI	Drop ≤0.4 PSI
Basketball	10 sequences; 3–9 PSI	Maximum deviation −0.4 PSI	Drop ≤0.4 PSI

Conclusion

S7-1 Precision Results is summarized from the validated source measurements. The noted below-target or unmeasurable points are reported explicitly and are not classified as passing results.

Document Information

Source data retained in the original report record. Article URL, images, categories, status, metadata, and schema are unchanged.

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