HIOKI BT3554-50 Battery Tester | Internal resistance 3 mΩ–3 Ω (1 μΩ resolution), voltage ±60 V DC, 1 kHz AC method, measure and save in approx. 2 s, optional Z3210 Bluetooth

HIOKI BT3554-50 Battery Tester: Simultaneous Internal Resistance and Voltage for UPS and Backup Battery Inspection

Overview

The BT3554-50 measures battery internal resistance and DC voltage simultaneously using the 1 kHz AC method (four-terminal test leads), for assessing the degradation of UPS, telecom and substation backup batteries. The BT3554 (no suffix) was discontinued in 2021; the BT3554-50 is the successor model designated by HIOKI.

Key Specifications

• Internal resistance: 3 mΩ–3 Ω in four ranges, 1 μΩ resolution on the 3 mΩ range; accuracy ±0.8% rdg. ±6 dgt. (3 mΩ range ±1.0% rdg. ±8 dgt.).
• Voltage: Two ranges ±6 V／±60 V, ±0.08% rdg. ±6 dgt.; maximum input 60 V DC, AC input not permitted.
• Measurement time: Approx. 100 ms per measurement, response time approx. 1.6 s; measure and save in as little as approx. 2 s.
• Judgment: PASS／WARNING／FAIL displayed against user-set thresholds.
• Wireless: With the optional Z3210, data can be sent via Bluetooth to GENNECT Cross or entered directly into Excel; the BT3554-91 and BT3554-92 are kits that include the Z3210.
• Power and weight: LR6 ×8, approx. 8.3 h continuous use; approx. 960 g including batteries and protector.

Applications

• Periodic inspection of UPS and data center backup batteries.
• Battery maintenance for DC power systems in telecom equipment rooms and substations.

Specifications per the HIOKI product page and discontinuation notice (retrieved 2026-10-20).