LCR-T4 12864LCD ESR SCR Meter – Product Description

The LCR-T4 is a universal electronic component tester designed for fast and accurate identification and measurement of various components. The device automatically detects the component type and displays all parameters on a clear 12864 LCD screen.

Supported measurements: - Resistors (R) - Capacitors (C) - Inductors (L) - Diodes and Zener diodes - Transistors (NPN/PNP, MOSFET, IGBT) - SCR and TRIAC - ESR measurement for electrolytic capacitors - hFE, voltage drop, leakage current, etc.

Ideal for electronics hobbyists, technicians, and repair specialists who need quick and reliable component diagnostics.

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Operating Instructions

1. Power Supply

• Powered by a 9V battery (standard “Krona” type).
• Insert the battery observing correct polarity.
• The tester turns on automatically when TEST is pressed.

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2. Connecting the Component

The device features a ZIF socket with pins 1–3.

1. Insert the component into any pair of pins (e.g., 1–2 or 1–3).
2. Lock it by pressing the green lever.
3. For polarized components (electrolytic capacitors, diodes), observe correct orientation.

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3. Testing Procedure

1. Press TEST.
2. Wait for 1–3 seconds.
3. The display will show:
   • Component type
   • Measured values (Ω, µH, nF–mF)
   • ESR
   • Vloss
   • hFE, Uth, Rds(on)
   • Pinout (G–D–S, B–C–E, etc.)

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4. Measuring Capacitors

⚠️ Warning: Always discharge capacitors before testing.

• An un-discharged capacitor may damage the tester.
• The display will show:
  • Capacitance value
  • ESR
  • Vloss %

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5. Measuring Semiconductors

The tester automatically identifies: - NPN / PNP transistors - N-MOS / P-MOS / IGBT - Pinout - hFE, Rds(on), Uth - Leakage currents - SCR / TRIAC condition

If the component is damaged, the tester may show partial or error data.

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6. Common Errors

• "No, unknown or damaged part" – incorrect connection or a faulty component.
• Very small inductances (<1 µH) may be inaccurate.
• Very large capacitors (>100 mF) are measured with limitations.

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7. Auto Power-Off

The device automatically powers off a few seconds after the measurement to save battery life.

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Summary

• Automatic component identification
• 12864 LCD display
• Measurements: R, C, L, ESR, diodes, transistors, MOSFET, SCR
• Powered by 9V battery
• Ideal for electronics diagnostics