ETENWOLF S7 Tire Inflator Pressure Accuracy Test Report — Unit 1# (Updated Firmware, 2025-03-13)

Document Overview

Key Findings The ETENWOLF Vortex S7 tire inflator (Unit S7-2# and Unit S7-3# with updated firmware) demonstrated pressure accuracy within ±0.6 PSI across all 64 inflation runs on two tire types, from full charge (4 bars) down to low charge (1 bar). Test date: 2025-03-13…

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

Key Findings

The ETENWOLF Vortex S7 tire inflator (Unit S7-2# and Unit S7-3# with updated firmware) demonstrated pressure accuracy within ±0.6 PSI across all 64 inflation runs on two tire types, from full charge (4 bars) down to low charge (1 bar).

  • Test date: 2025-03-13
  • Testing organization: Monozhen Technology (磨针科技)
  • Units tested: S7-2# (sedan tire) and S7-3# updated firmware (van tire)
  • Tire types: 215/55R17 sedan tire; 165/70R13 van tire
  • Pressure range tested: 10–40 PSI (multiple incremental segments per charge level)
  • Pressure accuracy deviation: −0.4 PSI to +0.6 PSI across all runs
  • Pressure retention (10 s hold): drop within 0.1–0.5 PSI in all cases
  • Battery charge levels tested: 4 bars → 3 bars → 2 bars → 1 bar
  • Mode: Car (轿车) mode
  • All readings within acceptable accuracy tolerance

Test Overview

Field Detail
Test Type Tire Inflation Pressure Accuracy
Standard Internal / Motor Performance
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1#
Test Date 2025-03-13
Product ETENWOLF Vortex S7 Tire Inflator
Model S7
Product Line Inflation Tools
Manufacturer / Testing Org Monozhen Technology (磨针科技)
Samples S7-2# (215/55R17 sedan tire); S7-3# updated firmware (165/70R13 van tire)
Sheet Index 2 of 7
Test Environment Indoor laboratory, standard ambient conditions

Test Equipment & Setup

Item Detail
Device Under Test ETENWOLF Vortex S7 Electric Tire Inflator
Unit S7-2# Tire 215/55R17 sedan car tire
Unit S7-3# Tire 165/70R13 van / minibus tire
Firmware Updated software (更新软件)
Inflation Mode Car mode (轿车模式)
Preset Pressure Range 10–40 PSI in incremental segments
Battery Charge Levels 4 bars (full), 3 bars, 2 bars, 1 bar (low)
Pressure Unit PSI
Hold Duration for Retention Check 10 seconds post-stop
Reference Instrument Standard pressure gauge (calibrated, used by testing organization)
Recording Method Manual read at stop + 10 s hold; deviation calculated vs. preset target

Test Procedure

  1. Pre-test: Charge S7 unit to full (4 bars). Confirm firmware update applied to S7-3# unit. Mount tire to test rig and confirm baseline pressure is at or below the starting value for each segment.
  2. Preset target: Set the inflator’s target pressure to the specified PSI value (e.g., 10, 15, 20 … 40 PSI) using the unit’s control interface in Car mode.
  3. Inflation run: Start inflation from the current tire pressure. The inflator runs until the preset target is reached and the unit auto-stops.
  4. Stop pressure reading: Record the pressure indicated at the moment the inflator stops (Stop Pressure, PSI).
  5. 10-second hold reading: Wait 10 seconds with the hose connected, then record the stabilized pressure (Stop+10 s Pressure, PSI).
  6. Calculate retention deviation: Retention Δ = Stop Pressure − Stop+10 s Pressure.
  7. Calculate accuracy deviation: Accuracy Δ = Stop+10 s Pressure − Preset Target Pressure.
  8. Record battery level: Note the displayed charge bar count after each run.
  9. Repeat: Continue sequential inflation segments across the full battery discharge cycle (4 bars → 3 bars → 2 bars → 1 bar), covering all planned target pressures.
  10. Post-test: Verify all 32 data rows per unit are recorded. Review for any outliers or anomalies.
  11. Acceptance criteria: Accuracy deviation (Accuracy Δ) within ±1.0 PSI across all charge levels and pressure ranges.

Test Data & Results

Unit S7-2# — 215/55R17 Sedan Car Tire

# Tire Inflation Range (PSI) Stop Pressure (PSI) Stop+10 s Pressure (PSI) Retention Δ (PSI) Preset Target (PSI) Accuracy Δ (PSI) Battery (bars) Notes
1 215/55R17 sedan 0–10 10.4 9.9 0.50 10 −0.10 4 Full charge
2 215/55R17 sedan 10–15 15.0 14.7 0.30 15 −0.30 4 Car mode
3 215/55R17 sedan 15–20 20.0 19.7 0.30 20 −0.30 4
4 215/55R17 sedan 20–25 25.2 24.9 0.30 25 −0.10 4
5 215/55R17 sedan 25–30 30.3 30.0 0.30 30 0.00 4
6 215/55R17 sedan 30–35 35.9 35.4 0.50 35 +0.40 4
7 215/55R17 sedan 35–40 40.5 40.2 0.30 40 +0.20 4
8 215/55R17 sedan 0–11 11.5 11.2 0.30 11 +0.20 4
9 215/55R17 sedan 11–16 16.0 15.7 0.30 16 −0.30 4
10 215/55R17 sedan 16–21 21.5 21.1 0.40 21 +0.10 4
11 215/55R17 sedan 21–26 26.1 25.8 0.30 26 −0.20 4
12 215/55R17 sedan 26–31 31.2 30.9 0.30 31 −0.10 3
13 215/55R17 sedan 31–36 36.5 36.0 0.50 36 0.00 3
14 215/55R17 sedan 0–12 12.5 12.3 0.20 12 +0.30 3
15 215/55R17 sedan 12–17 17.0 16.8 0.20 17 −0.20 3
16 215/55R17 sedan 17–22 22.0 21.8 0.20 22 −0.20 3
17 215/55R17 sedan 22–27 27.3 26.9 0.40 27 −0.10 3
18 215/55R17 sedan 27–32 32.4 32.0 0.40 32 0.00 3
19 215/55R17 sedan 32–37 37.4 37.1 0.30 37 +0.10 3
20 215/55R17 sedan 0–13 13.2 12.9 0.30 13 −0.10 3
21 215/55R17 sedan 13–18 18.2 17.9 0.30 18 −0.10 3
22 215/55R17 sedan 18–23 23.2 23.0 0.20 23 0.00 2
23 215/55R17 sedan 23–28 28.3 27.9 0.40 28 −0.10 2
24 215/55R17 sedan 28–33 33.2 32.8 0.40 33 −0.20 2
25 215/55R17 sedan 33–38 38.3 37.9 0.40 38 −0.10 2
26 215/55R17 sedan 0–14 14.4 13.9 0.50 14 −0.10 2
27 215/55R17 sedan 14–19 19.2 18.8 0.40 19 −0.20 2
28 215/55R17 sedan 19–24 24.4 24.0 0.40 24 0.00 2
29 215/55R17 sedan 24–29 29.6 29.2 0.40 29 +0.20 1
30 215/55R17 sedan 29–34 34.7 34.4 0.30 34 +0.40 1
31 215/55R17 sedan 34–39 38.9 38.8 0.10 39 −0.20 1
32 215/55R17 sedan 0–15 14.9 14.7 0.20 15 −0.30 1

Unit S7-3# (Updated Firmware) — 165/70R13 Van / Minibus Tire

# Tire Inflation Range (PSI) Stop Pressure (PSI) Stop+10 s Pressure (PSI) Retention Δ (PSI) Preset Target (PSI) Accuracy Δ (PSI) Battery (bars) Notes
1 165/70R13 van 0–10 10.9 10.6 0.30 10 +0.60 4
2 165/70R13 van 10–15 15.3 15.12 0.18 15 +0.12 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 30.6 30.1 0.50 30 +0.10 4
6 165/70R13 van 30–35 35.4 35.0 0.40 35 0.00 4
7 165/70R13 van 35–40 40.3 40.0 0.30 40 0.00 4
8 165/70R13 van 0–11 11.0 10.6 0.40 11 −0.40 4
9 165/70R13 van 11–16 16.3 15.9 0.40 16 −0.10 4
10 165/70R13 van 16–21 21.0 20.7 0.30 21 −0.30 4
11 165/70R13 van 21–26 26.4 26.0 0.40 26 0.00 4
12 165/70R13 van 26–31 31.2 30.7 0.50 31 −0.30 4
13 165/70R13 van 31–36 36.5 36.1 0.40 36 +0.10 4
14 165/70R13 van 0–12 12.5 12.1 0.40 12 +0.10 4
15 165/70R13 van 12–17 17.2 17.0 0.20 17 0.00 3
16 165/70R13 van 17–22 22.1 21.9 0.20 22 −0.10 3
17 165/70R13 van 22–27 27.3 26.9 0.40 27 −0.10 3
18 165/70R13 van 27–32 32.5 32.1 0.40 32 +0.10 3
19 165/70R13 van 32–37 37.2 36.8 0.40 37 −0.20 3
20 165/70R13 van 0–13 13.7 13.2 0.50 13 +0.20 3
21 165/70R13 van 13–18 18.2 17.9 0.30 18 −0.10 3
22 165/70R13 van 18–23 23.5 23.1 0.40 23 +0.10 3
23 165/70R13 van 23–28 28.2 28.0 0.20 28 0.00 3
24 165/70R13 van 28–33 33.6 33.3 0.30 33 +0.30 3
25 165/70R13 van 33–38 38.4 37.9 0.50 38 −0.10 2
26 165/70R13 van 0–14 14.4 14.0 0.40 14 0.00 2
27 165/70R13 van 14–19 19.2 18.9 0.30 19 −0.10 2
28 165/70R13 van 19–24 24.4 24.0 0.40 24 0.00 2
29 165/70R13 van 24–29 29.1 28.6 0.50 29 −0.40 2
30 165/70R13 van 29–34 34.2 33.7 0.50 34 −0.30 1
31 165/70R13 van 34–39 39.3 38.8 0.50 39 −0.20 1
32 165/70R13 van 0–15 15.5 15.2 0.30 15 +0.20 1

Observations: All 64 accuracy deviation readings fall within ±0.6 PSI. No single run exceeded this bound across either unit or any charge level. Pressure retention drop over 10 seconds ranged from 0.10 to 0.50 PSI, consistent with normal hose bleed-back behavior. Performance was stable from full charge (4 bars) through to low charge (1 bar), indicating the updated firmware maintains consistent cut-off control regardless of battery state. The largest positive deviation (+0.60 PSI) occurred on S7-3# run 1 (0→10 PSI), and the largest negative deviation (−0.40 PSI) occurred on S7-3# run 8 (0→11 PSI) and run 29 (24→29 PSI).

Conclusion

Parameter Detail
Result PASS
Standard / Criteria Accuracy deviation within ±1.0 PSI of preset target
Observed Accuracy Range −0.40 PSI to +0.60 PSI
Observed Retention Drop (10 s) 0.10–0.50 PSI
Conditions Car mode; PSI unit; 10–40 PSI range; full to low battery (4→1 bars)
Samples Tested S7-2# with 215/55R17 sedan tire; S7-3# (updated firmware) with 165/70R13 van tire
Total Runs 64 (32 per unit)
Verdict Both units pass tire inflation pressure accuracy requirements across all battery charge levels and pressure ranges tested.

Document Information

Role Name Detail
Author / Publisher Daniel Wright daniel.wright (user_id: 3)
Testing Organization Monozhen Technology 磨针科技
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1#
Sheet Index 2 of 7
Report Date 2025-03-13
Published Date 2026-07-23
Category 0气泵类项目 / Inflation Tools — Motor Performance (term_id: 96)

Frequently Asked Questions

What does the accuracy deviation figure mean in this test?

Accuracy deviation (Accuracy Δ) is the difference between the stabilized pressure at 10 seconds after the inflator stops and the user-preset target pressure. A value of −0.10 PSI means the tire ended up 0.10 PSI below target; +0.40 PSI means it ended 0.