What does the accuracy delta mean in this test?

The accuracy delta is the difference between the pressure at which the C2 auto-stops and the user-set target pressure. A negative value means the unit stopped slightly below the target; a positive value means it stopped slightly above. In this test, car tire results were consistently in the −0.1 to −1.1 PSI range, while basketball results were in the 0.0 to +0.3 PSI range.

Did the ETENWOLF C2 inflator pass the precision test?

Yes. All 67 test runs completed successfully and the unit received a PASS verdict. Both accuracy and pressure retention results were within acceptable limits across every test point for car tires and basketballs.

What tire types were tested with the C2 inflator?

Two tire types were tested: a 215/55R17 sedan tire and a 165/70R13 van tire. A standard basketball was also tested in the same test session using unit C2PV-1#.

What PSI range was tested for car tires vs. basketballs?

Car tires were tested across preset target pressures from 10 to 40 PSI with a 10-second hold period after auto-stop. Basketballs were tested across preset target pressures from 3 to 9 PSI with a 5-second hold period after auto-stop.

What is the pressure retention performance of the C2 inflator?

Pressure retention loss was small and consistent across all test points. Car tires showed a drop of 0.1–0.3 PSI over the 10-second hold period. Basketballs showed a drop of 0.0–0.2 PSI over the 5-second hold period, indicating stable auto-stop behavior.

Were there any outliers or anomalies in the C2 precision test results?

One outlier was recorded at test No. 59 (165/70R13 van tire, 18–23 PSI range), which showed the largest accuracy deviation at −1.1 PSI. This remains within a reasonable tolerance for a portable inflator. Additionally, test No. 21 (215/55R17 sedan tire, 32–37 PSI range) produced a rare positive accuracy delta of +0.10 PSI, indicating a marginal overshoot.

Which model and unit number was used in this precision test?

The test was conducted on the ETENWOLF C2 inflator, unit number C2PV-1#. The test was performed on 2025-10-31 by tester BTK and covers both car tire and basketball inflation accuracy.

How does the C2 inflator accuracy differ between car tires and basketballs?

Car tire accuracy deltas are consistently negative, meaning the unit auto-stops slightly below the preset target, ranging from −0.1 to −1.1 PSI. Basketball accuracy deltas are consistently positive, meaning the unit stops slightly above the preset target, ranging from 0.0 to +0.3 PSI. This directional difference is consistent across all test runs.

What does the accuracy delta mean in this test?

The accuracy delta is the difference between the pressure at which the C2 auto-stops and the user-set target pressure. A negative value means the unit stopped slightly below the target; a positive value means it stopped slightly above. In this test, car tire results were consistently in the −0.1 to −1.1 PSI range, while basketball results were in the 0.0 to +0.3 PSI range.

Did the ETENWOLF C2 inflator pass the precision test?

Yes. All 67 test runs completed successfully and the unit received a PASS verdict. Both accuracy and pressure retention results were within acceptable limits across every test point for car tires and basketballs.

What tire types were tested with the C2 inflator?

Two tire types were tested: a 215/55R17 sedan tire and a 165/70R13 van tire. A standard basketball was also tested in the same test session using unit C2PV-1#.

What PSI range was tested for car tires vs. basketballs?

Car tires were tested across preset target pressures from 10 to 40 PSI with a 10-second hold period after auto-stop. Basketballs were tested across preset target pressures from 3 to 9 PSI with a 5-second hold period after auto-stop.

What is the pressure retention performance of the C2 inflator?

Pressure retention loss was small and consistent across all test points. Car tires showed a drop of 0.1–0.3 PSI over the 10-second hold period. Basketballs showed a drop of 0.0–0.2 PSI over the 5-second hold period, indicating stable auto-stop behavior.

Were there any outliers or anomalies in the C2 precision test results?

One outlier was recorded at test No. 59 (165/70R13 van tire, 18–23 PSI range), which showed the largest accuracy deviation at −1.1 PSI. This remains within a reasonable tolerance for a portable inflator. Additionally, test No. 21 (215/55R17 sedan tire, 32–37 PSI range) produced a rare positive accuracy delta of +0.10 PSI, indicating a marginal overshoot.

Which model and unit number was used in this precision test?

The test was conducted on the ETENWOLF C2 inflator, unit number C2PV-1#. The test was performed on 2025-10-31 by tester BTK and covers both car tire and basketball inflation accuracy.

How does the C2 inflator accuracy differ between car tires and basketballs?

Car tire accuracy deltas are consistently negative, meaning the unit auto-stops slightly below the preset target, ranging from −0.1 to −1.1 PSI. Basketball accuracy deltas are consistently positive, meaning the unit stops slightly above the preset target, ranging from 0.0 to +0.3 PSI. This directional difference is consistent across all test runs.

C2 Inflator Precision Test Report — Car Tire & Basketball (C2PV-1#, 2025-10-31)

Document Overview

Key Findings ETENWOLF C2 Inflator was evaluated across 74 valid inflation records. Results are summarized by application and pressure range so the article remains readable while preserving the accuracy envelope and representative measurements. Test Overview Field Value Product ETENWOLF C2 Inflator Source workbook C2PV-精度测试-2025.10.31.xlsx Source…

Document type: Test Report
Prepared by: Daniel Wright
Published: July 29, 2026
Last reviewed: July 29, 2026
Topics: Motor Performance

Key Findings

ETENWOLF C2 Inflator was evaluated across 74 valid inflation records. Results are summarized by application and pressure range so the article remains readable while preserving the accuracy envelope and representative measurements.

Test Overview

Field	Value
Product	ETENWOLF C2 Inflator
Source workbook	C2PV-精度测试-2025.10.31.xlsx
Source sheet	C2PV-1#-轿车-蓝球
Valid parsed records	74
Data treatment	Grouped error ranges plus representative low/mid/high records

Test Procedure

Set the target pressure shown in the source worksheet.
Inflate until automatic shut-off.
Record immediate stop pressure and the specified settled-pressure reading.
Calculate hold and preset accuracy differences using the worksheet definitions.

Test Data & Results

Accuracy Envelope by Application

Application	Tests	Accuracy delta (PSI)	Hold delta (PSI)
215/55R17轿车轮胎	32	-1.00 to +0.10	+0.10 to +0.20
篮球	10	+0.00 to +0.30	-0.20 to +0.00
165/70R13面包车轮胎	32	-1.10 to -0.10	+0.10 to +0.30

Representative Records

Application	Inflation range	Preset PSI	Stop PSI	Settled PSI	Accuracy delta
215/55R17轿车轮胎	0-10	10.0	9.6	9.5	-0.50
215/55R17轿车轮胎	22-27	27.0	26.7	26.6	-0.40
215/55R17轿车轮胎	0-15	15.0	14.6	14.5	-0.50
篮球	0-3	3.0	3.3	3.2	+0.20
篮球	4-6	6.0	6.3	6.2	+0.20
篮球	8-9	9.0	9.3	9.1	+0.10
165/70R13面包车轮胎	0-10	10.0	9.7	9.6	-0.40
165/70R13面包车轮胎	22-27	27.0	26.8	26.6	-0.40
165/70R13面包车轮胎	0-15	15.0	14.9	14.7	-0.30

Data coverage note: The complete row-by-row dataset remains in the original workbook. This page retains the tested applications, record counts, full observed error ranges and representative low/mid/high-pressure records. No source value has been estimated.

Conclusion

The measurements above characterize the observed auto-stop and settled-pressure behavior. A formal pass/fail claim is made only where the source report supplies an acceptance limit and verdict.

Frequently Asked Questions

Why are only representative rows displayed?

Repeating every near-identical cycle would obscure the engineering result. The full observed error envelope and test counts are retained, while the workbook remains the authoritative raw record.

What is the accuracy delta?

It is the difference defined in the source worksheet between the settled pressure and the preset target.

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