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MD1035x 1kV Smart Insulation Tester

About the MD1035x:
The TENTECH MD1035x is a compact, digital insulation tester capable of measuring insulation resistances up to 1 TΩ. With selectable voltages from 100 V to 1 kV (steps of 50 V), it is ideal for transformer and equipment testing. Advanced features such as automatic polarization index (PI) and dielectric absorption ratio (DAR) simplify insulation diagnostics, while programmable pass/fail thresholds and timers ensure reliable field and laboratory testing.

Measured values can be printed on the built-in thermal printer, stored in the 4000-reading internal memory, or transferred via USB to the included T-Logger software for data management, trend analysis, and automatic report generation. Its rugged IP65 housing, rechargeable LFP battery, and lightweight design make it a durable and portable solution for field environments.

Key Features

  • Insulation resistance measurement up to 1 TΩ

  • Test voltages: 100 V, 250 V, 500 V, 1000 V (steps: 50 V)

  • Short circuit current: 1.5 ± 0.5 mA

  • Auto-range function

  • Automated PI and DAR calculations

  • Programmable pass/fail and timer functions

  • Real-time clock and calendar

  • Built-in thermal printer (records every 15 seconds)

  • Internal memory: 4000 readings

  • USB interface with T-Logger software

  • Rugged IP65 housing (closed lid)

  • Rechargeable LiFePO4 battery

  • Digital + bargraph display

Technical Specifications

Test voltages

  • Direct: 100 V, 250 V, 500 V, 1000 V

  • Selectable: 100 V – 1 kV in 50 V steps (DC, negative)

Resistance measurement

  • 500 GΩ @ 100 V up to 500 V

  • 1 TΩ @ 525 V up to 1000 V

Accuracy

  • ± 5 % ± 3 digits (1 MΩ – 500 GΩ, all test voltages)

Short circuit current

  • 1.5 ± 0.5 mA

Advanced features

  • PI & DAR automated calculation

  • Programmable pass/fail thresholds

  • Programmable timer

  • Auto power-off

Printer & memory

  • Built-in printer (records elapsed time, voltage & resistance)

  • Stores up to 4000 measurements

  • USB interface with PC connectivity

Environmental & safety

  • IP65 (closed lid)

  • IEC 61010-1, IEC 61326-1 compliant

  • Immunity: IEC 61000-4-2 (electrostatic), IEC 61000-4-3 (EMI)

Power supply

  • LiFePO4 battery (12 V – 3000 mAh, rechargeable)

  • Charger: 12 V – 2 A

Operating conditions

  • Operating: -10 °C to 50 °C (14 °F to 122 °F)

  • Storage: -25 °C to 70 °C (-13 °F to 158 °F)

  • Humidity: 95 % RH (non-condensing)

Dimensions & weight

  • 274 × 250 × 124 mm (10.78" × 9.84" × 4.88")

  • 2.7 kg (5.95 lbs)

Included Accessories

  • 2 × measuring test leads

  • 1 × GUARD test lead

  • 1 × AC adapter

  • 1 × USB cable

  • 1 × T-Logger software (CD-ROM)

  • 1 × User guide

  • 1 × Protective carrying bag

Desktop Software

T-Logger software allows downloading stored test data, trend analysis, graphical/test report generation, and operator notes.

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