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Fluke BT521 Battery Analyzer
  • Fluke BT521 Battery Analyzer
  • Fluke BT521 Battery Analyzer
  • Fluke BT521 Battery Analyzer

Fluke BT521 Advanced Battery Analyser

Fluke authorised distributor and calibration house.

Includes: Fluke BT521 Battery Analyser, 4-Wire Test Pin (Set), BTL10 Basic Test lead (Set), TL175 TwistGuard Test Leads with Adapter, 2x L300 Attachable LED Torches, BTL21 Intelligent Test Probe Set with Extender and Temperature Sensor, i410 AC/DC Current Clamp, Lithium Ion Battery, AC Charger, Mini USB Cable, Shoulder Strap, Belt Strap, Magnetic Hanging Strap, FlukeView Battery Management Software, Soft Carrying Case, 2 x Spare Fuses, 100 x Paper Battery Tags.

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The Fluke BT521 Battery Analyser is a multifunctional meter designed for the test and measurement of a stationary battery system. The BT521 can measure the battery internal resistance and voltages. These measurements can be used to determine the overall condition of the system. It can also measure electrical parameters for battery system maintenance, including dc voltage up to 600 V, ac voltage up to 600 V rms, and ripple voltage.

Fluke Battery Analysers allow you to quickly and easily define upper and lower measurement thresholds or tolerance ranges. During the testing process, measured values are automatically compared to the predefined threshold levels producing a PASS, FAIL or WARN indication after each measurement. A maximum of 10 sets of thresholds can be stored.

The BT521 offers wireless communication for data download and remote display while measuring via the dedicated Fluke Battery Analyser mobile app


Key measurements: Battery resistance, dc and ac voltage, dc and ac current, ripple voltage, frequency and battery temperature.
Sequence measurement mode: Automatic or manual sequence testing of battery strings.
Comprehensive logging: All measured values are automatically captured during testing.
Optimised user interface.
Threshold comparison: Configure multiple reference values and thresholds for resistance and voltage.
Ergonomic test leads.
Enhanced data analysis.
Easy reporting: Generate PDF report on the PC software with analysis graphics.
BTL21 Intelligent Test Probes with long and short extenders, built-in LCD display and speaker.
Wireless capability works with Fluke Battery Analyze mobile app (Fluke BA Mobile).

Fluke BT500 Series Quick Demo Video

Fluke BT521 Specifications
Functions Range Resolution Accuracy BT510 BT520 BT521
Battery Resistance / Strap Resistance1 3 mΩ 0.001 mΩ 1% + 8
30 mΩ 0.01 mΩ 0.8% + 6
300 mΩ 0.1 mΩ 0.8% + 6
3000 mΩ 1 mΩ 0.8% + 6
Vdc 6 V 0.001 V 0.09% + 5
60 V 0.01 V 0.09% + 5
600 V 0.1 V 0.09% + 5
1000 V 1V 0.09% + 5
Vac (45 Hz to 500 Hz with 800 Hz filter) 600 V 0.1 V 2% + 10
Frequency (displayed with Vac and Aac)2 500 Hz 0.1 Hz 0.5% + 8
AC voltage ripple (20KHz Max) 600 mV 0.1 mV 3% + 20
6000 mV 1 mV 3% + 10
Adc/Aac (with accessory Fluke i410) 400 A 1 A 3.5% + 2
Temperature 0°C to 60°C 1°C 2°C (4 °F)
Meter mode 999 records for each measurement position with time stamp.
Sequence mode Up to 100 profiles and 100 profile templates (Each profile stores up to 450 batteries) with time stamp.
1 The measurement is based on ac injection method. The injected source signal is < 100 mA, 1 kHz.
2 Trigger level VAC: 10 mV, Aac: 10 A.
Measurement Modes BT510 BT520 BT521
Resistance (mΩ)
Battery voltage
Voltage dc
Voltage ac and frequency (Hz)
Ripple volt
Temperature of negative battery post
DC and ac current (and frequency)
DMM mode
Sequence mode
Discharge measurement mode
Automatic measurement save
Wireless communication
Memory view
General Specifications
Operating temperature 0°C to 40°C.
Storage temperature -20°C to 50°C.
Lithium-ion battery charging temperature 0°C to 40°C.
Operating humidity Non-condensing (10°C).
<=80% RH (at 10°C to 30°C).
<=75% RH (at 30°C to 40°C).
Operating altitude Sea level to 2000 meters.
Storage altitude Sea level to 12,000 meters.
IP rating IP40.
Radio FCC Class A.
Vibration requirements MIL-PRF-28800F: Class 2.
Drop test requirements 1 meter.
Temperature coefficients Add 0.1 x specified accuracy for each degree C above 28°C or below 18°C.
Safety compliance 600 V CAT III.
EMC IEC 61326.
ROHS China, Europe.
Protection class 2 Pollution Degree II.
Battery compliance UN38.3.
2G per IEC68-2-26, 25G, and 29.
Dimensions (H x W x D) 22 cm x 10.3 cm x 5.8 cm (9 in x 4 in x 2 in).
Weight 850 g (1.9 lb).
Screen dimensions 7.7 cm x 5.6 cm (3 in x 2.2 in).
Interface USB mini.
Fluke BT521 Warranty 3 years.


Fluke BT500 Series Datasheet

PDF Specifications of the Fluke BT510, BT520 & BT521 Battery Analysers.

Download (1.49M)

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