UNI-T UT3550 Hand Held Battery Tester
The UNI-T UT3550 is a portable battery internal-resistance tester designed for real-time, on-the-spot evaluation of battery condition. It presents itself as a handheld instrument with a clear, operator-focused interface that guides users through measurement steps, zeroing and result storage. The unit is intended to simplify routine battery checks by giving immediate, easy-to-read feedback so technicians can quickly decide on battery status without lengthy setup.
Operation centers on a four-terminal measurement flow: connect the supplied leads, perform a short-circuit zeroing step to remove lead offsets, and trigger the measurement. The instrument’s menus and onscreen prompts walk users through calibration, measurement mode selection and saving results; data can be captured locally for later review. Its design balances handheld portability with workflow features found in benchtop testers, aiming to reduce measurement errors and speed inspection cycles.
The UT3550 emphasizes practical usability for field and production environments: it supports automated data recording, simple comparator-based sorting (pass/fail), and connectivity for remote control and data transfer. In short, it’s a focused tool for technicians and engineers who need reliable, repeatable battery checks with quick access to saved test records.
Features:
- Automated real-time internal resistance measurement.
- Full-range short-circuit zeroing (calibration) to remove lead offsets.
- Built-in comparator/sorting with OK/NG indications.
- Dual display arrangement (main + auxiliary) for convenient reading.
- USB Type-C remote control and data transfer support (SCPI compatible).
- On-device data storage and screenshot capture to USB.
- Portable, handheld design with user-centric menu flow.
Specifications:
| Parameter | Specification (from manual) |
|---|---|
| Resistance measurement range: | 0.001 mΩ – 30.000 Ω. |
| Resistance accuracy: | ±0.5% rdg ±5 dgt. |
| Voltage measurement range: | 0.0001 V – 100.00 V. |
| Voltage accuracy: | ±0.05% rdg ±5 dgt. |
| Resolution (example): | resistance down to 1 µΩ resolution in lowest range; voltage down to 100 µV. |
| Measuring currents (per ranges): | ranges use different test currents (e.g., up to ~150 mA in some ranges; see manual table). |
| Display: | 3.5″ main LCD + 0.96″ auxiliary OLED. |
| Range modes: | Auto and Manual (for resistance and voltage). |
| Calibration: | Full-range short-circuit zeroing. |
| Testing speed: | ~1 measurement/s (manual range). |
| Data storage: | Up to 500 groups; exportable to USB (CSV). |
| Interface: | Type-C (communication), USB (storage). |
| Protocol: | SCPI compatible. |
| Power / Battery: | Built-in rechargeable lithium battery (2000 mAh) or external adapter. |
| Charging / Operating time: | Charging <5 h; operating ≈5 h (at low brightness). |
| Protection / Environmental: | IP65 dustproof/splash resistant; operating temp 0–40°C. |
Applications:
- Battery quality inspection and production QC.
- UPS online internal resistance measurement.
- Lithium-cell testing and R&D.
- Field service and maintenance checks.
- Automated test systems / factory integration (via SCPI).
Package Contents:
- 1x Battery internal resistance tester
- 1x Power adapter
- 1x Soft carrying pouch
- 1x Shoulder belt
- 1x USB communication cable (Type-C)
- 1x Magnetic strap
- 1x UT3550 Kelvin clips wire (standard test lead supplied).
- 1x UT3550 test pen (crown probe)
- 1x User manual
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