ETENWOLF C2 Tire Inflator Motor Load Current Test Report (C2PV, 2025-11-01)

Document Overview

Key Findings The ETENWOLF C2 tire inflator (model C2PV) was subjected to a motor load current test on 2025-11-01, measuring draw current across a pressure range of 10.0 to 150.0 PSI for two sample units (8# and 9#). Both units demonstrated consistent current profiles, peaking…

Document type: Test Report
Prepared by: Daniel Wright
Published: July 22, 2026
Last reviewed: July 22, 2026
Topics: Motor Performance

Key Findings

The ETENWOLF C2 tire inflator (model C2PV) was subjected to a motor load current test on 2025-11-01, measuring draw current across a pressure range of 10.0 to 150.0 PSI for two sample units (8# and 9#). Both units demonstrated consistent current profiles, peaking around 120–130 PSI before tapering at higher loads.

Test Type: Motor Performance — Load Current
Model: C2 (Sheet: C2PV)
Samples Tested: Unit 8#, Unit 9#
Load Range: 10.0 – 150.0 PSI (15 measurement points per unit)
Peak Current (8#): 12.3 A at 110.0 PSI and 120.0 PSI
Peak Current (9#): 12.3 A at 130.0 PSI
Test Date: 2025-11-01

Test Overview

Parameter	Detail
Test Type	Motor Performance — Load Current
Report / Sheet	C2PV-负载电流数据 (C2PV Load Current Data)
Test Date	2025-11-01
Product Model	ETENWOLF C2 Tire Inflator (C2PV)
Product Line	Inflation Tools
Source File	C2PV-负载电流数据2025.11.1.xls
Sheet Index	1 of 2
Samples	Unit 8#, Unit 9#
Total Data Rows	15 load points per unit (30 measurements total)

Test Equipment & Setup

Parameter	Value
Test Item	Motor load current under varying pressure loads
Measurement Unit	Amperes (A) for current; PSI for load
Load Range	10.0 PSI to 150.0 PSI
Load Step Interval	10.0 PSI per measurement point
Number of Load Points	15 per unit
Number of Units	2 (8# and 9#)
Current Measurement Instrument	Ammeter / Data acquisition system (as used in production lab)
Test Date	2025-11-01

Test Procedure

Pre-test: Confirm sample unit identity (8#, 9#) and record baseline condition. Verify measurement instruments are calibrated and zeroed.
Setup: Connect the C2PV unit to the test rig. Attach the ammeter in series with the motor power supply circuit to measure draw current.
Load Application: Apply a controlled pressure load starting at 10.0 PSI. Record the draw current (A) at each load point.
Increment: Increase load in 10.0 PSI steps up to 150.0 PSI, recording current at each step.
Repeat: Perform the same procedure for both Unit 8# and Unit 9# independently.
Post-test: Disconnect unit from test rig. Review recorded data for any anomalies or out-of-range readings.
Acceptance Criteria: Current values should follow the expected motor characteristic curve (rising with load, then tapering at high pressure). No thermal runaway or sudden current spike should occur.

Test Data & Results

Unit	Load (PSI)	Current (A)	Unit	Load (PSI)	Current (A)
8#	10.0	7.7	9#	10.0	6.7
8#	20.0	8.5	9#	20.0	7.6
8#	30.0	9.3	9#	30.0	8.3
8#	40.0	9.9	9#	40.0	9.1
8#	50.0	10.1	9#	50.0	9.8
8#	60.0	10.8	9#	60.0	10.5
8#	70.0	11.4	9#	70.0	10.6
8#	80.0	11.7	9#	80.0	10.8
8#	90.0	11.9	9#	90.0	11.5
8#	100.0	12.1	9#	100.0	11.7
8#	110.0	12.3	9#	110.0	12.0
8#	120.0	12.3	9#	120.0	12.2
8#	130.0	12.2	9#	130.0	12.3
8#	140.0	11.9	9#	140.0	12.1
8#	150.0	11.4	9#	150.0	11.9

Observations: Both units display a characteristic bell-curve current profile. Unit 8# reaches its peak of 12.3 A at 110.0–120.0 PSI, then decreases to 11.4 A at 150.0 PSI. Unit 9# reaches its peak of 12.3 A at 130.0 PSI, then decreases to 11.9 A at 150.0 PSI. Unit 9# consistently draws slightly less current than Unit 8# at equivalent loads in the lower pressure range (10–100 PSI), converging at higher pressures. No abnormal spikes or drops were recorded in either unit.

Conclusion

Item	Detail
Test	Motor Load Current — C2PV
Load Range Tested	10.0 – 150.0 PSI
Samples	Unit 8# and Unit 9#
Peak Current (8#)	12.3 A (at 110.0 PSI and 120.0 PSI)
Peak Current (9#)	12.3 A (at 130.0 PSI)
Current at 150.0 PSI (8#)	11.4 A
Current at 150.0 PSI (9#)	11.9 A
Profile Shape	Normal bell-curve motor characteristic — rises with load, peaks at mid-to-high pressure, tapers at maximum load
Verdict	Both units exhibit normal motor load current behavior with no anomalies detected

Document Information

Role	Name	Details
Author / Publisher	Daniel Wright	ETENWOLF Test Lab
Source Document	C2PV-负载电流数据2025.11.1.xls
Sheet Name	C2PV (Sheet 1 of 2)
Test Date	2025-11-01
Article Published	2026-07-12

Frequently Asked Questions

What does the load current test measure for the ETENWOLF C2 tire inflator?

The load current test measures the electrical current (in amperes) drawn by the C2PV motor as the output pressure increases from 10.0 to 150.0 PSI. This characterizes how the motor responds under real working conditions and helps verify it stays within safe operating limits.

At what pressure does the ETENWOLF C2 motor draw peak current?

In this test, Unit 8# reached peak current of 12.3 A at 110.0–120.0 PSI, and Unit 9# reached the same peak of 12.3 A at 130.0 PSI. Above these points, current tapers slightly as the motor behavior changes at higher pressures.

Why does current decrease at very high pressure loads?

As the inflator approaches its upper pressure range, airflow resistance increases significantly, causing the motor to slow down. The reduced motor speed results in lower back-EMF opposition, which can cause the current curve to flatten or slightly decline — a normal characteristic of DC motor behavior under stall-approaching conditions.

Were both C2PV units within acceptable current range?

Yes. Both Unit 8# and Unit 9# produced consistent, expected bell-curve current profiles across all 15 load points from 10.0 to 150.0 PSI. No abnormal spikes, drops, or deviations were recorded in either unit during the 2025-11-01 test session.

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