GYS BT551 Start-Stop Battery Tester (BT551)

The BT551 START-STOP is an easy-to-use highly precise professional battery tester with an integrated printer.
Multifunction device, it can perform 3 types of tests :

• 6-12V battery (tests voltage & charge state, cold cranking Amps & battery health etc)
• 12-24V starter motor (tests starting voltage - cranking voltage test)
• 12-24V alternator circuit (tests no load voltage and charging voltage as well as current undulation (ripple) during the charge)

Test 3 lead-acid battery types from 7 to 230 Ah :

• Sealed batteries VRLA/GEL/AGM FLAT/AGM SPIRAL & CAL/CAL
• Non sealed batteries SLI
• START / STOP batteries (AGM & EFB)

Tolerance : CCA < ± 5% Voltage ± 0,05%

Special feature to test the battery’s internal resistance.

Multi-standards :

• SAE : 40 to 2000 CCA
• DIN : 25 to 1300 CCA
• IEC : 30 to 1500 CCA
• EN : 40 to 2100 CCA
• JIS : depending on Japanese battery type number

Highly precise thanks to its dynamic resistance measuring technology that minimises battery discharge and displays a reliable result not skewed by :

• surface charge
• parasitic load (lights, various indicators, etc)
• contact defaults (battery terminal corrosion/oxidation, loose terminals, etc)

Can test a battery out of the vehicle or in-situ.

Tests deeply discharged batteries from 1.5 V.

Protected against polarity reversal.

Instantaneous analysis:

• Battery voltage (1.5V to 30V)
• Available starting power (real or in %)
• Charge state and battery health (%)
• Adjustable backlighting

Multilingual interface :

• English / French / German / Spanish / Italian / Portuguese / Turkish / Japanese