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8
BT780 Battery Analyzer User’s Guide - English Version_V3.00
2.3 Specification
Display: 128 * 64 pixels, large, backlit display
screen Working Temperature: -20 to 60°C (-4 to
140°F) Storage Temperature: -20 to 70°C (-4 to
158°F) Power Supply: 8-30V DC
Dimensions (L*W*H):
90*240*45mm Net Weight
(without printer): 0.8 KG Net
Weight (with printer): 1.0KG
2.4 Current Clamp
To test cranking amps and charging current, connect the current clamp before tester start-up,
and then turn on the current clamp. Connect the battery tester, press the reset key of the
current clamp and connect the current clamp jaw to the anode wiring between the battery and
the generator.
As the minimum width of the current clamp jaw is only 28mm, choose the connection cable or
connection pole with diameter less than 28mm to test. Otherwise, the current clamp jaw
cannot close completely.
NOTE
1. Current clamp jaw must close to avoid in accurate test results.
2. Current clamp uses 9V alkaline battery. Power the clamp off after using.
3. Before testing the current, take off the current clamp from the battery positive connection
cable, and reset.
3 Operation
This section describes how to use the tester to perform tests on car batteries and 12V&24V
starting and charging system. The menu-driven display will guide you step by step through the
test process.
3.1 Connecting The Tester
The tester powers on automatically when it is correctly connected to the battery. The preferred
test position depends on battery terminals. If the battery is not accessible, you may test at the
jumper post; however, the power measurement may be lower than the actual value.
To connect the tester:
1. Clean the battery posts or side terminals.
2. Connect the red clamp to the positive (+) terminal and the black clamp to the negative (-)
terminal.
3. Move the clamps back and forth to make sure the clamps are firmly connected. In case the
connection is poor, a “CHECK CONNECTION” message displays.
4. When the tester is correctly connected, it boots up automatically and shows the voltage of
the battery.
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