Insulation Resistance Tester – Manual Range, 250V/500V/1000V Test Voltage, 200MΩ-2GΩ Range with Safety Alarm & Data Hold

🌟 Why This Insulation Resistance Tester Is Essential

🚀 Core Advantages & Key Features

✅ Versatile Test Voltages & Wide Resistance Range

• Test Voltages: 250V, 500V, 1000V – compatible with:
  • 250V: Low-voltage devices (e.g., household appliances, small motors)
  • 500V: Standard wiring (e.g., building electrical systems, power tools)
  • 1000V: Medium-voltage equipment (e.g., industrial control panels, transformers)
• Resistance Ranges:
  • 200MΩ (for 250V/500V testing): Measures insulation in everyday electrical components.
  • 2GΩ (for 1000V testing): Handles high-resistance insulation in industrial gear.
  • 2KΩ: Precise low-resistance checks (e.g., continuity in wiring).
• Voltage Measurement: Also tests DC (1000V) and AC (750V) voltages – eliminates the need for a separate multimeter.

✅ Precise Accuracy & Reliable Performance

• High Accuracy Ratings:
  • 200MΩ (250V/500V): ±(4.0% of reading + 2) – ensures trustworthy results for routine inspections.
  • 2GΩ (1000V): ±(4.0% of reading + 2) – reliable for critical industrial tests.
  • 2KΩ: ±(0.8% of reading + 6) – precise for low-resistance continuity checks.
  • DC 1000V: ±(0.5% of reading + 6); AC 750V: ±(1.0% of reading + 6) – accurate voltage verification.
• 3 Times/Second Sampling Rate: Captures stable readings quickly (even for slow-responding insulation) – no long waits for results.
• 50-200Hz AC Frequency Response: Works seamlessly with standard power grids – no measurement errors from frequency fluctuations.

✅ Safety-First Design with Clear Alerts

• High-Voltage Warning System: When the test button is pressed:
  • Red warning light illuminates to signal active high voltage.
  • High-voltage symbol appears on the LCD.
  • "Beep-beep" alarm sounds to alert nearby personnel.
• Lockable Test Button: Rotate the circular test button right to lock (keeps the test running without holding the button) – ideal for hands-free operation; rotate left to stop.
• Fault Alarm: Buzzer sounds a long tone if insulation resistance drops to ~5% of the range or a short circuit occurs – instantly flags dangerous insulation failures.
• Functional Protection: 10MΩ protection against overloads – safeguards the tester (and user) from unexpected voltage spikes.

✅ User-Friendly Features for Efficiency

• Data Hold: Freezes stable readings on the LCD – perfect for recording values in hard-to-reach spots (e.g., inside electrical cabinets).
• 10-Second Backlight: Illuminates the display when activated – easy reading in dimly lit areas (e.g., basements, workshops).
• Large LCD Display (75x52mm): 1999-count screen shows values clearly – no squinting at tiny numbers.
• Dual Power Supply: Runs on 6x1.5V AA batteries (portable for on-site use) or external DC 9V adapter (cost-effective for workshop testing).
• Low Voltage Display: Alerts when battery voltage drops below ~7.5V – prevents inaccurate readings from weak batteries.

📊 Detailed Technical Specifications

🛠️ How to Use

1. Select Function: Turn the gear switch to the desired test voltage (250V/500V/1000V) or measurement mode (resistance/voltage).
2. Connect Test Leads: Attach the measured object’s electrodes to the corresponding instrument sockets (use included crocodile clips for secure connections).
3. Start Test: Press the circular test button. For hands-free use, rotate it right to lock.
4. Read Results: Wait for the displayed value to stabilize, then record (use "Data Hold" to freeze readings if needed).
5. Stop Test: Rotate the test button left to unlock and end the test.

📦 Complete Package Contents

• 1 × Insulation Resistance Tester (main unit)
• 2 × Test Lines (for connecting to measured objects)
• 2 × Crocodile Clips (secure grip on wires/electrodes)
• 1 × Braces (for stable placement during testing)
• 1 × User Manual (detailed instructions for operation & safety)
• 1 × Storage Box (protects the tester during transport/storage)

💯 Reliability & Customer Support

• Durable Build: Designed for frequent use in harsh environments (e.g., construction sites, factories) – resistant to dust and minor impacts.
• Safety Certified: Compliant with electrical testing tool standards – use with confidence for high-voltage applications.
• Prompt Support: For questions about operation, calibration, or troubleshooting, contact us via eBay Message – we respond within 24 hours.