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MD1000R 1kV Insulation Tester True Megohmmeter

Introduction to the MD1000R

The TENTECH MD1000R is a smart, microprocessor-controlled 1 kV insulation tester measuring up to 200 GΩ at 250 V / 500 V / 1000 V test voltages. It’s a portable, hand-held, battery-powered true megohmmeter (measures actual V & I), so resistance accuracy isn’t affected by test-voltage error. Operation is simple: connect leads, power on, pick test voltage, press TEST—the instrument auto-ranges and displays the result on a 3½-digit display.

Safety and usability highlights include recessed output terminals, an HV present indicator with automatic discharge, GUARD terminal to shunt surface leakage, a 200 mA continuity range, low-resistance measurement, AC/DC voltmeter to 600 V (True RMS), selectable timer, hold, and pass/fail with audible indication. Rugged, light, and long-lasting—ideal for field work.

Key Features

  • Insulation resistance up to 200 GΩ at 250/500/1000 V

  • True megohmmeter principle (direct V & I measurement)

  • Short-circuit current: 1.5 ± 0.3 mA

  • GUARD terminal to eliminate surface leakage effects

  • 200 mA continuity & low-resistance measurement (0.05 Ω…150 Ω)

  • AC/DC True RMS voltmeter up to 600 V

  • Programmable timer & pass/fail thresholds with acoustic alert

  • Hold function, over-voltage protection (600 V)

  • NiMH rechargeable battery; compact & field-ready design

Technical Specifications

  • Test voltages: 250 V / 500 V / 1000 V (negative DC)

  • Insulation resistance range: 10 kΩ…200 GΩ

  • Test-voltage accuracy: −0 / +15 % (10 MΩ to open circuit)

  • Basic accuracy:

    • R ≤ 50 GΩ: ±5 % rdg ±2 dgt

    • R > 50 GΩ: ±10 % rdg ±2 dgt

  • Continuity / Low-R: 0.05 Ω…150 Ω, ±5 % rdg ±2 dgt, up to 200 mA; buzzer at R < 5 Ω ±0.5 Ω

  • Built-in timer: 5, 10, 15, 30 s; 1, 2, 3, 5, 10, 15 min

  • Pass/Fail limits:

    • 1…500 MΩ; 1…100 GΩ (selectable steps as listed)

  • Voltmeter (True RMS): 0…600 VAC/DC, ±3 % rdg ±2 dgt

  • Safety/EMC: IEC 61010-1; IEC 61326-1; IEC 61000-4-2/-4-3

  • Power: Built-in NiMH; ~1000 tests (5 s on / 25 s off per IEC 61557-2)

  • Charging: Built-in charger, 12 V / 2 A external supply

  • Environment: −10…50 °C op, −10…70 °C storage, 95 % RH (non-condensing)

  • Dimensions / Weight: 102×195×46 mm (4.01″×7.68″×1.81″) / ~0.5 kg (1.1 lb)

Included Accessories

  • 2 × measuring test leads

  • 1 × GUARD lead

  • Power cord

  • Carrying bag

  • Operating instructions

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