AUTOOL BT270 Automotive Leakage Current Clamp Meter
US$76.00
- 0–60 A AC/DC Clamp
- 1 mA Display Resolution
- Automatic AC/DC Recognition
- One-Button DC Zero
- 0–60 A AC/DC Clamp: Measure AC or DC current with a non-contact clamp across the 0–60 A range.
- 1 mA Display Resolution: View current changes at 1 mA display resolution.
- Automatic AC/DC Recognition: Let the meter recognize AC or DC signals automatically for common current checks.
- One-Button DC Zero: Zero the clamp before DC measurements with the dedicated Zero/Backlight control.
- 99-Set Data Memory: Hold readings and store up to 99 numbered data sets for later review.
- 0–60 A AC/DC Clamp: Measure AC or DC current with a non-contact clamp across the 0–60 A range.
- 1 mA Display Resolution: View current changes at 1 mA display resolution.
- Automatic AC/DC Recognition: Let the meter recognize AC or DC signals automatically for common current checks.
- One-Button DC Zero: Zero the clamp before DC measurements with the dedicated Zero/Backlight control.
- 99-Set Data Memory: Hold readings and store up to 99 numbered data sets for later review.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL BT270 · 0–60A AC/DC Clamp Meter
Investigate Battery Drain Without Opening the Circuit
Clamp this automotive parasitic drain tester around one conductor to measure vehicle current draw without opening the circuit. BT270 measures AC or DC current across a 0–60 A range, shows small changes at 1 mA display resolution, and stores up to 99 numbered readings for later comparison. One-button zeroing prepares the clamp for DC checks.
- Clamp-On AC / DC Current
- 0 mA–60 A Range
- 1 mA Display Resolution
- Stores 99 Readings
- One-Button DC Zero
Key Features
Clamp-On Current with 1mA Display Resolution
Automatic AC/DC Recognition
The meter automatically recognizes AC or DC signals and switches modes without manual mode shifting for common current checks.
0mA-60A Non-Contact Measurement
Measure AC/DC current from 0mA to 60A with 1mA resolution using a clamp-on, non-contact testing method.
Leakage Current Diagnosis
Supports DC leakage current, AC leakage current, ground wire leakage current, and main line current checks.
Backlit LCD Display
The 4-digit LCD screen with backlight helps make current readings easier to see in darker repair environments.
One-Button Zeroing
Press the Zero/Backlight button to reset data to zero before testing. No manual zero-adjustment knob is required.
Data Hold, Memory, And Review
Use the Hold/Mem/Mr button to hold readings and store up to 99 numbered data sets for later review.
Auto Power-Off
After 5 minutes of inactivity, the LCD flashes for 30 seconds before automatic shutdown unless the Power button is pressed to retain the test status.
9V Battery Power
The BT270 runs on a 9V dry battery for portable use around vehicle electrical systems and workshop environments.
Compact Clamp Design
The integrated clamp, trigger, power button, Zero/Light button, Hold/Mem/Mr button, and LCD are arranged in a compact handheld body.
CAT III 600V Line Rating
The BT270 is marked CAT III 600V for line testing. This safety category is separate from its 0mA–60A clamp-current measurement range; stay within the meter, leads, environment, and procedure ratings.
LCD Size
The LCD measures 35 × 21.5 mm.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Zero, Clamp and Record Current Changes
Power On
Install a 9V dry battery if needed, then press the Power button to turn the meter on or off.
Zero Before Testing
The meter starts in DC current mode. Press the Zero/Backlight button to zero first, then clamp the wire. For AC current, the meter can auto-zero; for AC current below 25mA, long press the Power button to switch manually.
Clamp The Correct Wire
Clamp the positive and negative DC wires together for DC leakage-current checks, or the live and neutral AC wires together for AC leakage-current checks. Clamp the ground wire alone for ground leakage current, or the main wire alone for the corresponding current measurement.
Read, Hold, Or Store Data
Read the current value on the LCD. Press Hold/Mem/Mr to hold and store data automatically; long press Hold/Mem/Mr to review stored data.
Diagnose Quiescent Current
Turn off all appliances and set the key to the off position. If quiescent current is too high, pull fuses one by one. A clear current drop after one fuse is removed indicates the corresponding circuit should be checked.
Safe Use
Respect Conductor, Range and Sleep-State Limits
Stay Within Range
Do not exceed the specified measurement range of the instrument. The BT270 is designed for 0mA-60A AC/DC current measurement.
Use Caution Above 60V DC / 30V AC
Operate carefully when the line voltage is greater than 60V DC or 30V AC. Use proper electrical safety procedures.
Zero Before Measurement
Before measuring, press the Zero/Backlight button to perform automatic zero adjustment, especially for DC current testing.
Stop If Safety Is Uncertain
If continued use may create a safety hazard, stop using the meter, isolate it, and contact support or an authorized service provider.
Keep The Jaws Clean
Keep the jaw contact surface clean. Serious contamination can affect measurement accuracy even though the meter has strong anti-interference ability.
Avoid Heat, Humidity, And Sunlight
Do not store the clamp meter for a long time in high temperature, high humidity, condensation, non-ventilated areas, or direct sunlight.
Avoid Impact On The Clamp
Avoid impact on the instrument, especially on the jaw joint and contact surface, because damage may affect testing accuracy.
Replace Low Battery Promptly
Low battery can affect test accuracy. Replace the 9V battery when the battery symbol appears, and remove the battery if the meter will not be used for a long time.
Qualified Maintenance Only
Disassembly, calibration, and maintenance should be performed only by qualified professionals or authorized service personnel.
Use the Results to Plan the Next Check
For current-draw checks, clamp one battery conductor, zero the meter for DC measurement, record the vehicle sleep state, and evaluate the 1 mA resolution with the documented accuracy.
Specifications
Measurement Range and Tool Specifications
| Specification | Value |
|---|---|
| Current range | 0 mA to 60 A AC/DC |
| Resolution | 1 mA |
| Stored readings | Up to 99 data sets |
| Display | 4-digit backlit LCD |
| Power supply | 9 V dry battery |
| Jaw opening | 16 × 18 mm |
Manual & Support
Find the Manual and Connection Guidance
AUTOOL BT270 User Manual
Open the PDF manual for AUTOOL BT270 non-contact current measurement, AC and DC recognition, leakage diagnosis, zeroing, data hold, electrical safety and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL BT270 leakage current tester clamp
- StorageProtective storage pouch
- DocumentationAUTOOL BT270 user manual
- Retail BoxBT270 product packaging
- BatteryReminder BT270 uses a 9V dry battery; confirm whether the battery is included before ordering if required.
Buyer Questions
Circuit Connection and Measurement Questions
What Is AUTOOL BT270 Used For?
BT270 is used for automotive dark current, leakage current, power consumption current, motor startup current, generator charging current, ground wire leakage current, and main line current checks. It is a clamp-on current draw tester, not a power-probe circuit activation tool.
Does BT270 Automatically Recognize AC And DC?
Yes. BT270 can automatically recognize AC or DC current and switch modes without manual mode shifting for common testing. For AC current below 25mA, long press the Power button to switch manually.
What Is The Measuring Range And Resolution?
The BT270 measuring range is 0mA-60A AC/DC with 1mA AC/DC resolution. If the LCD shows OL, the measured current is over the maximum test range.
Should I Zero The Meter Before Measurement?
Yes. Press the Zero/Backlight button before measurement to perform automatic zero adjustment. The meter starts in DC current mode after power-on. For AC measurement, the meter can auto-zero, but zeroing before general testing is still a safe operating habit.
Can BT270 Measure Automotive Quiescent Current?
Yes. Turn off all vehicle appliances, turn the key off, allow the vehicle to reach the sleep state specified by its diagnostic procedure, and make sure the clamp is fully closed during testing. Typical quiescent current may be about 30-40mA, while some European vehicles may be about 80-90mA depending on vehicle class and installed equipment. Use the vehicle’s specified limits when judging the reading.
What Should I Do If Quiescent Current Is Too High?
If tested quiescent current is 100mA or above after the vehicle reaches the sleep state specified by its diagnostic procedure, electrical leakage may exist. Open the fuse box and pull fuses one by one. If the current drops clearly after one fuse is removed, check the corresponding circuit or appliance, repair the issue, and test again.
Can BT270 Replace A Power Probe Circuit Tester?
No. BT270 is mainly for clamp-on current measurement and leakage-current diagnosis. If you need polarity testing, continuity testing, jumper lead operation, component activation, relay testing, diode testing, or power-probe functions, compare BT160, BT210, BT250, BT260, and BT280 before ordering.
What Power Supply Does BT270 Use?
BT270 uses a 9V dry battery. Replace the battery promptly when the low-battery symbol appears, because low battery can affect measurement accuracy. Remove the battery if the meter will not be used for a long time.
What Is Included In The Package?
Package contents: BT270 main unit, storage pouch, user manual, and retail box. BT270 requires a 9 V dry battery; the listed package contents do not include one.
How Long Is The Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
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