LQ-750 Battery Internal Resistance Tester

Touchscreen analyzer for predictive maintenance of lead-acid/Li-ion batteries with AC impedance technology

Technical parameters

Core Capabilities

• 🔋 Dual Operation Modes - 7" color touchscreen or physical buttons

• 📊 Visual Diagnostics - Voltage/resistance/capacity bar chart comparison

• ⚡ AC Discharge Method - 1kHz frequency for accurate impedance measurement

• 🖨️ Automated Reporting - Generates battery health reports via PC software

Testing Methodology

AC Impedance Analysis

1. Non-Load Testing - Applies 1kHz AC signal without discharging

2. Quadrupole Measurement - Eliminates contact resistance errors

3. Health Assessment

4. :

• New battery: ≤5% of rated internal resistance

• Replace when >30% increase

Diagnostic Features

Real-Time Visualization

• Oscilloscope mode (optional)

• Voltage ripple analysis

Smart Alerts

• Overvoltage protection (auto-cutoff)

• Capacity deviation warnings

Battery Health Indicators

Field Testing Process

1. Connect probes to battery terminals

2. Select auto-test mode (3-second measurement)

3. Review color-coded results:

• Green:

  <10% resistance="" increase="">

• Yellow: 10-30% increase

• Red: >30% increase

PC Software Capabilities

• 📈 Trend analysis of battery aging

• 🖨️ Custom report generation

• 📤 CSV/PDF export