UT3550 Handheld Battery Internal Resistance Tester

Powered by a high-performance 32-bit ARM microprocessor, the UT3550 delivers fully automatic, real-time testing with exceptional accuracy. Combining the portability of a handheld device with the superior performance of a benchtop instrument, it is a high-precision, high-resolution measuring tool.

UNI-T UT3550 Main Features:

• Voltage Measurement Range: 0.0001V to 100.000V.

• Resistance Measurement Range: 0.001mΩ to 30.00Ω.

• Display: 3.5-inch TFT LCD screen.

• Standard Interface: Type-C port. Supports remote control, data acquisition, and analysis via PC software.

• Wide Compatibility: Suitable for internal resistance testing of almost all battery types, including lithium batteries, lead-acid batteries, button cells, etc.

• UPS Testing: Enables stable and accurate online measurements directly on UPS systems.

• Protection: IP65 dustproof and waterproof rating.

FAQ

Q1: What are the measurement ranges and accuracy of UT3550?

A1: Voltage: 0.0001V ~ 100.000V, accuracy ±0.05% ±5dgt. Resistance: 0.001mΩ ~ 30.00Ω, accuracy ±0.5% ±5dgt. It supports auto and manual ranges.

Q2: What comparison and sorting modes are available?

A2: 3 comparison modes: ABS absolute deviation, PER relative deviation, SEQ direct reading comparison. It supports PASS/FAIL judgment with configurable buzzer alarm.

Q3: What system functions does it have?

A3: Keyboard lock, screenshot, Chinese/English switch, key tone setting, USB drive storage, full-range short circuit zero calibration. Test speed is 1 reading per second.

Q4: What is the Type‑C interface used for?

A4: It works for SCPI communication, USB storage and charging.

Q5: What power supply options are supported?

A5: 7.4V 2000mAh rechargeable lithium battery or external 9VDC 2A power adapter.

Q6: What is the warm-up requirement?

A6: It needs at least 15 minutes warm-up time before high-precision measurement.

Q7: What accessories are included?

A7: Standard accessories: power adapter, Type‑C cable, carrying bag, shoulder strap, magnetic hanging strap, UT-L87 Kelvin clips. UT-L86 crown probes are optional.