Fluke FLUKE-BT521 Battery Tester 500

Fluke 500 Series Battery Tester, 600V Maximum Voltage Rating, All Chemistries Compatibility - FLUKE-BT521

This battery tester is a portable, handheld analyser designed to assess individual stationary batteries and battery banks used in critical backup systems. It simplifies routine maintenance, troubleshooting and performance evaluation by combining voltage, resistance and temperature measurement capabilities with automated sequence testing and wireless data transfer for field and remote analysis.

Features & Benefits

• Measures internal resistance with 0.001mΩ resolution for precise assessment
  Supports dc and ac voltage up to 1000V for high-voltage systems
  Integrated temperature sensing for temperature-correlated diagnostics
  Automatic sequence mode stores up to 450 batteries per profile for efficient surveys
  Wireless data download and remote display via mobile app for immediate review
  USB Interface and PC software enable trend analysis and PDF report generation

**Applications**

• Suitable for checking intercell strap resistance in battery strings
  Ideal for maintenance of UPS and critical backup installations
  Used for on-site logging and trend analysis of stationary battery banks
  Can be used for acceptance testing after battery replacement or installation

What measurement types are automatically logged during a string test?

During sequence testing the instrument captures voltage, resistance and temperature readings with time stamps and stores them for later review.

How does the instrument handle data transfer and reporting in the field?

Measurements can be downloaded via USB to desktop software for histograms and PDF reports or sent wirelessly to a mobile app as CSV or quick-email format.

What safety and environmental ratings are relevant for industrial use?

The device meets 600V CAT III safety classification, electromagnetic compatibility to IEC61326, and RoHS China environmental restrictions.

What battery and runtime provision supports continuous field operation?

A 7.4V 3000mAh lithium‑ion pack provides more than eight hours of continuous operation and is rechargeable via the supplied AC charger.

Which accessory enables temperature measurement on negative posts?

An intelligent test probe with integrated temperature sensor is used to Record temperature directly at the negative battery post.

Notes

*Not currently compatible with Fluke Connect™

Supplied with

Battery analyzer
4-wire test pin (set)
BTL10 Basic Test Lead (set) (RS 837-2094)
TL175 TwistGuard™ Test Leads with adapter
BTL21 Intelligent Test Probe Set, with extender and temperature sensor (RS 837-2091)
i410 AC/DC Current Clamp
BP500 lithium-ion battery (RS 837-2104)
BC500 AC charger (RS 837-2101)
Mini-USB cable
Shoulder strap
Belt strap
Magnetic hanging strap
FlukeView® Battery Management Software
Soft carrying case
Spare fuses (2)
Battery tags
Zero Ohm Calibration Resistor