ETENWOLF S7 Tire Inflator Pressure Accuracy Test Report — Unit 2# (Updated Firmware, 2025-03-13)

Document Overview

Key Findings The ETENWOLF Vortex S7 tire inflator (Unit 2#, updated firmware) completed 64 cumulative inflation runs across two tire sizes, with all pressure accuracy readings falling within ±0.5 PSI of the preset target across all battery levels. Unit tested: S7 Electric Tire Inflator —…

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

Key Findings

The ETENWOLF Vortex S7 tire inflator (Unit 2#, updated firmware) completed 64 cumulative inflation runs across two tire sizes, with all pressure accuracy readings falling within ±0.5 PSI of the preset target across all battery levels.

  • Unit tested: S7 Electric Tire Inflator — Sample 2# (updated firmware)
  • Test date: 2025-03-13
  • Tire types: 215/55R17 passenger car tire (32 runs); 165/70R13 van tire (32 runs)
  • Pressure range tested: 10–40 PSI (incremental steps from various base pressures)
  • Maximum stop-pressure overshoot observed: 0.6 PSI
  • Maximum 10-second hold deviation from preset: ±0.5 PSI
  • Battery levels covered: 4 bars → 1 bar (full discharge sequence)
  • All accuracy deviations: within ±0.5 PSI — PASS
  • Pressure retention (stop vs. 10 s hold): all within 0.6 PSI — PASS

Test Overview

Field Details
Test Type Tire Pressure Accuracy (Motor Performance)
Standard Internal product specification — Moji Technology (磨针科技)
Report / File S7充气泵-轮胎精度测试（更新软件）2025.3.13.xlsx — Sheet: S7-轮胎精度2#
Test Date 2025-03-13
Product ETENWOLF Vortex S7 Tire Inflator
Manufacturer / Lab Moji Technology (磨针科技)
Sample ID S7-2# (Unit 2, updated firmware)
Tire Sample A 215/55R17 Passenger Car Tire
Tire Sample B 165/70R13 Van Tire
Test Environment Not specified (indoor lab, standard conditions assumed)
Sheet Index 5 of 7

Test Equipment & Setup

Parameter Value / Description
Device Under Test ETENWOLF Vortex S7 Electric Tire Inflator — Sample 2# (updated firmware)
Pressure Unit PSI
Preset Pressure Targets 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 PSI
Inflation Mode (215/55R17 runs 1–7) Car / Sedan mode (轿车模式)
Battery Level Range 4 bars (full charge) → 1 bar (low charge)
Hold Timer 10 seconds post-stop measurement
Measured Parameters Stop pressure (PSI), 10 s hold pressure (PSI), retention delta (PSI), preset target (PSI), accuracy delta (PSI), battery level (bars)
Reference Instrument Not explicitly specified — internal calibrated gauge assumed

Test Procedure

  1. Pre-test: Fully charge S7 unit to 4-bar battery level. Confirm firmware update is applied to Sample 2#. Mount tire (215/55R17 or 165/70R13) and record starting pressure.
  2. Preset target: Set the desired stop pressure on the S7 inflator display (e.g., 10 PSI for first run).
  3. Inflation run: Activate the inflator in the appropriate mode (Car mode for sedan tire). Allow the unit to inflate and auto-stop at the preset value.
  4. Stop-pressure reading: Immediately record the displayed/measured pressure at auto-stop (Stop Pressure, PSI).
  5. 10-second hold reading: After 10 seconds with no additional inflation, record the stabilised pressure (10 s Pressure, PSI).
  6. Calculate retention delta: Stop Pressure − 10 s Pressure = Retention Delta (PSI).
  7. Calculate accuracy delta: 10 s Pressure − Preset Target = Accuracy Delta (PSI).
  8. Record battery level: Note the number of battery bars displayed at the end of each run.
  9. Increment start pressure: Use the current tyre pressure as the new starting point; set the next preset target and repeat steps 3–8 through all planned increments.
  10. Battery discharge sequence: Continue runs as battery depletes from 4 bars to 1 bar, covering multiple starting-pressure series (0→10, 0→11, 0→12, 0→13, 0→14, 0→15 PSI series).
  11. Post-test: Repeat all steps for the second tire type (165/70R13 van tire). Compile all data and compare accuracy and retention deltas against acceptance criteria.
  12. Acceptance criteria: Accuracy delta (10 s pressure vs. preset) must be within ±0.5 PSI for all runs at all battery levels.

Test Data & Results

Table 1 — 215/55R17 Passenger Car Tire (S7 Unit 2#, Updated Firmware)

No. Tire Inflation Range (PSI) Stop Pressure (PSI) 10 s Pressure (PSI) Retention Delta (PSI) Preset Target (PSI) Accuracy Delta (PSI) Battery (Bars) Notes
1 215/55R17 Passenger 0–10 10.1 9.9 0.20 10 −0.10 4 Full charge
2 215/55R17 Passenger 10–15 15.6 15.1 0.50 15 0.10 4 Car mode
3 215/55R17 Passenger 15–20 20.3 20.1 0.20 20 0.10 4
4 215/55R17 Passenger 20–25 25.2 24.9 0.30 25 −0.10 4
5 215/55R17 Passenger 25–30 30.2 29.8 0.40 30 −0.20 4
6 215/55R17 Passenger 30–35 35.4 35.0 0.40 35 0.00 4
7 215/55R17 Passenger 35–40 40.4 39.9 0.50 40 −0.10 4
8 215/55R17 Passenger 0–11 11.4 10.9 0.50 11 −0.10 4
9 215/55R17 Passenger 11–16 16.3 16.0 0.30 16 0.00 4
10 215/55R17 Passenger 16–21 21.4 21.2 0.20 21 0.20 4
11 215/55R17 Passenger 21–26 26.5 26.1 0.40 26 0.10 4
12 215/55R17 Passenger 26–31 31.6 31.2 0.40 31 0.20 3
13 215/55R17 Passenger 31–36 36.4 36.0 0.40 36 0.00 3
14 215/55R17 Passenger 0–12 12.5 12.2 0.30 12 0.20 3
15 215/55R17 Passenger 12–17 17.0 16.8 0.20 17 −0.20 3
16 215/55R17 Passenger 17–22 22.6 22.3 0.30 22 0.30 3
17 215/55R17 Passenger 22–27 27.5 27.2 0.30 27 0.20 3
18 215/55R17 Passenger 27–32 32.6 32.2 0.40 32 0.20 3
19 215/55R17 Passenger 32–37 37.2 36.9 0.30 37 −0.10 3
20 215/55R17 Passenger 0–13 13.4 13.1 0.30 13 0.10 3
21 215/55R17 Passenger 13–18 18.6 18.2 0.40 18 0.20 3
22 215/55R17 Passenger 18–23 23.2 22.9 0.30 23 −0.10 2
23 215/55R17 Passenger 23–28 28.4 28.1 0.30 28 0.10 2
24 215/55R17 Passenger 28–33 33.6 33.2 0.40 33 0.20 2
25 215/55R17 Passenger 33–38 38.5 38.0 0.50 38 0.00 2
26 215/55R17 Passenger 0–14 14.0 13.9 0.10 14 −0.10 2
27 215/55R17 Passenger 14–19 19.3 18.9 0.40 19 −0.10 2
28 215/55R17 Passenger 19–24 24.6 24.0 0.60 24 0.00 2
29 215/55R17 Passenger 24–29 29.6 29.2 0.40 29 0.20 1
30 215/55R17 Passenger 29–34 34.4 33.9 0.50 34 −0.10 1
31 215/55R17 Passenger 34–39 39.6 39.2 0.40 39 0.20 1
32 215/55R17 Passenger 0–15 15.6 15.2 0.40 15 0.20 1

Table 2 — 165/70R13 Van Tire (S7 Unit 2#, Updated Firmware)

No. Tire Inflation Range (PSI) Stop Pressure (PSI) 10 s Pressure (PSI) Retention Delta (PSI) Preset Target (PSI) Accuracy Delta (PSI) Battery (Bars) Notes
1 165/70R13 Van 0–10 10.3 10.0 0.30 10 0.00 4
2 165/70R13 Van 10–15 15.5 15.2 0.30 15 0.20 4
3 165/70R13 Van 15–20 20.3 19.9 0.40 20 −0.10 4
4 165/70R13 Van 20–25 25.4 25.0 0.40 25 0.00 4
5 165/70R13 Van 25–30 30.5 30.2 0.30 30 0.20 4
6 165/70R13 Van 30–35 35.4 34.9 0.50 35 −0.10 4
7 165/70R13 Van 35–40 40.5 40.1 0.40 40 0.10 4
8 165/70R13 Van 0–11 11.5 11.2 0.30 11 0.20 4
9 165/70R13 Van 11–16 16.4 16.1 0.30 16 0.10 4
10 165/70R13 Van 16–21 21.3 21.0 0.30 21 0.00 4
11 165/70R13 Van 21–26 26.6 26.2 0.40 26 0.20 4
12 165/70R13 Van 26–31 31.5 31.0 0.50 31 0.00 4
13 165/70R13 Van 31–36 36.6 36.1 0.50 36 0.10 4
14 165/70R13 Van 0–12 12.3 12.0 0.30 12 0.00 4
15 165/70R13 Van 12–17 17.5 17.2 0.30 17 0.20 3
16 165/70R13 Van 17–22 22.3 21.9 0.40 22 −0.10 3
17 165/70R13 Van 22–27 27.6 27.2 0.40 27 0.20 3
18 165/70R13 Van 27–32 32.3 32.0 0.30 32 0.00 3
19 165/70R13 Van 32–37 37.5 37.0 0.50 37 0.00 3
20 165/70R13 Van 0–13 13.5 13.2 0.30 13 0.20 3
21 165/70R13 Van 13–18 18.0 17.5 0.50 18 −0.50 3
22 165/70R13 Van 18–23 23.7 23.3 0.40 23 0.30 3
23 165/70R13 Van 23–28 28.4 28.0 0.40 28 0.00 3
24 165/70R13 Van 28–33 33.3 33.0 0.30 33 0.00 3
25 165/70R13 Van 33–38 38.4 38.0 0.40 38 0.00 2
26 165/70R13 Van 0–14 14.6 14.3 0.30 14 0.30 2
27 165/70R13 Van 14–19 19.2 19.0 0.20 19 0.00 2
28 165/70R13 Van 19–24 24.4 24.1 0.30 24 0.10 2
29 165/70R13 Van 24–29 29.6 29.0 0.60 29 0.00 2
30 165/70R13 Van 29–34 34.6 34.2 0.40 34 0.20 1
31 165/70R13 Van 34–39 39.2 38.7 0.50 39 −0.30 1
32 165/70R13 Van 0–15 15.1 14.9 0.20 15 −0.10 1

Observations: Across all 64 runs on both tire types, the accuracy delta (10 s stabilised pressure vs. preset target) remained within ±0.5 PSI. The single borderline reading was run 21 of the 165/70R13 series (−0.50 PSI) at 3-bar battery. The largest retention delta (stop pressure minus 10 s pressure) was 0.60 PSI, observed twice (215/55R17 run 28; 165/70R13 run 29), indicating minimal pressure bleed-back after auto-stop. Battery depletion from 4 bars to 1 bar showed no measurable degradation in pressure accuracy.

Conclusion

Item Detail
Result All accuracy deltas within ±0.5 PSI; all retention deltas ≤ 0.6 PSI
Standard / Criteria Internal spec — accuracy within ±0.5 PSI of preset target (10 s stabilised)
Conditions PSI range 10–40; battery 4 bars → 1 bar; two tire sizes
Samples Tested S7 Unit 2# (updated firmware); 215/55R17 passenger tire; 165/70R13 van tire
Total Runs 64 (32 per tire type)
Verdict PASS

Document Information

Role Name Details
Author / Publisher Daniel Wright daniel.wright (user_id: 3)
Testing Organization Moji Technology (磨针科技) Internal lab
Source File S7充气泵-轮胎精度测试（更新软件）2025.3.13.xlsx
Sheet Name S7-轮胎精度2# (Sheet index 5 of 7)
Article Published 2026-07-12
Product Line ETENWOLF Inflation Tools — Model S7
Category Air Pump Projects (0气泵类项目)

Frequently Asked Questions

What does the accuracy delta in this test represent?

The accuracy delta is the difference between the stabilised pressure measured 10 seconds after the inflator auto-stops and the preset target pressure. A value of 0.00 means the S7 hit the target exactly; positive values indicate a slight over-inflation, negative values a slight under-inflation relative to the preset.

Did the S7 Unit 2# pass the pressure accuracy test?

Yes. Across all 64 runs on both tire types (215/55R17 passenger and 165/70R13 van), every accuracy delta fell within the internal specification of ±0.5 PSI of the preset target measured at 10 seconds after auto-stop. The verdict is PASS.

Does battery level affect pressure accuracy on the S7?

No measurable degradation was observed. The test was conducted as battery level dropped from 4 bars (full charge) down to 1 bar, and accuracy deltas remained consistently within ±0.5 PSI throughout all battery states.

What was the largest pressure retention loss recorded?

The largest retention delta — the difference between the stop pressure and the stabilised pressure 10 seconds later — was 0.60 PSI. This was observed twice: run 28 on the 215/55R17 tire and run 29 on the 165/70R13 tire, indicating minimal pressure bleed-back after auto-stop.

Which tire sizes were used in the S7-轮胎精度2# test?

Two tire sizes were tested: a 215/55R17 passenger car tire and a 165/70R13 van tire. Each tire received 32 consecutive inflation runs covering PSI ranges from 10 to 40 at varying starting pressures and across all battery charge levels.

What was the single borderline reading in this test?

Run 21 of the 165/70R13 van tire series recorded an accuracy delta of −0.50 PSI at 3-bar battery level (range 13–18 PSI, stop pressure 18.0 PSI, 10 s stabilised pressure 17.5 PSI). This is exactly at the ±0.5 PSI specification boundary and is still considered a passing result.