Megger IDAX300 Insulation Diagnostic Analyzers

Sell used Megger IDAX-300 Insulation Diagnostic Analyzer, IDAX is an insulation diagnostic instrument based on Dielectric Frequency Response (DFR) and Frequency Domain Spectroscopy (FDS). Unit is used and in excellent condition.

Condition: Used

Up for sale Used and Excellent condition Megger IDAX 300 Insulation Diagnostic Analyzer with accessories and cables. Unit has been thoroughly tested and comes with a 60-day warranty.

Packages includes:

  • Megger IDAX 300 Insulation Diagnostic Analyzer
  • Megger Measuring Cable Orange 60ft (Red Connector)
  • Megger Measuring Cable Orange 60ft (Blue Connector)
  • Megger Generator Cable Black 60ft
  • IEC Power Cable
  • Ground Clamp Cable 15ft
  • RJ45 Communication Cable
  • USB Communication Cable
  • Megger Memory Stick
  • IDAX User Manual
  • Megger Hard Carry Case

IDAX is an insulation diagnostic instrument based on DFR (Dielectric Frequency Response), also known as FDS (Frequency Domain Spectroscopy). DFR technology is an established test procedure in laboratories, that in an innovative effort by Megger, has been adapted for field use in the IDAX range of instruments.

In short, DFR is the measurement of capacitance and losses (tan delta or power factor) over multiple frequencies. The measured DFR curve is dependent on insulation geometry, moisture, oil conductivity, and temperature. By advanced curve fitting to the reference material model, it is possible to calculate moisture content mainly in solid insulation, the oil’s conductivity at 25 °C reference temperature and tan delta/power factor at 20 °C reference temperature.

In these calculations, ITC (Individual Temperature Correction), another important Megger innovation, is used to translate test data from the test object temperature to the reference temperatures. The IDAX SW incorporates an ITC corrected frequency sweep specifically designed for assessment of instrument transformers and bushings.

Thanks to a novel approach to the combination of time and frequency domain data, IDAX provides the shortest measurement time in the marketplace for a full DFR measurement from 1 kHz to 10 μHz. Separate reference models are fitted to each data set (time or frequency) prior to transformation and combination, which eliminates the risk of artifacts introduced by approximations or transformation of incomplete data sets.

IDAX is exceedingly easy to use with an automated test flow and presentation of results that uses an easy-to-understand “traffic light” manner.

  • State-of-the-art measurement of moisture content, tan delta / power factor and oil conductivity using DFR (Dielectric Frequency Response)
  • Dedicated test procedures for power transformers, bushings, and current transformers
  • Automated individual temperature correction (ITC) for accurate comparison with reference data/tests
  • Reliable measurements even in high interference environments
  • Fastest system in marketplace due to novel and reliable combination of frequency
  • Fastest system on the market, due to its novel and reliable combination of frequency and time domain measurement data


IDAX300 Specifications

PC requirements
Processor Pentium 500 MHz
Memory 512 Mb RAM
Interface USB 2.0 and Ethernet
Mains voltage 100 – 240 V ±10 %, 50 / 60 Hz
Power consumption 250 VA (max)
Dimensions 340 x 330 x 100 mm (13.38” x 13” x 3,93”)
Weight 4.9 kg (11 lbs) unit and 21 kg (43 lbs) incl. accessories in flight case
Measurement section 100-250 V ac, 50/60 Hz ±2 Hz Unit can be operated while charging. Charging time is approximately three hours
Inputs Red, blue, ground
Capacitance range 10 pF – 100 μF
Inaccuracy 0.5 % + 1 pF
Tan delta range 0 - 100 (with retained accuracy of capacitance; otherwise higher)
Power factor range 0 - 1 (with retained accuracy of capacitance; otherwise higher)
Inaccuracy (at 200 Vpeak)
  • >1000 : pF 0.5 % of rd + 0.01 % absolute
  • >300 : pF 0.5 % of rd + 0.02 % absolute
  • >10 : pF 0.5 % of rd + 0.10 % absolute
Max AC interference
  • 1 mA, 1:10 SNR (IDAX)
  • 10 mA, 1:10 SNR (VAX020)
Max DC interference 2 μA (IDAX) 20 μA (VAX020)
Field calibration Possible with IDAX Calibration Box CAL300 (AG-90010)
Time domain current measurement (PDC)  
Range ±50 mA
Resolution 0.1 pA
Inaccuracy 0.5% ±1 pA
Input resistance (DC mode) ≤10 kΩ


Voltage/current ranges, 10 V
  • 0 – 10 Vpeak
  • 0 – 50 mA peak
Voltage/current ranges, 200 V
  • 0 – 200 Vpeak
  • 0 – 50 mA peak
Frequency range DC, 0.1 mHz - 10 kHz
For external amplifier E.g,. VAX020
Application field The instrument is intended for use in medium and high-voltage substations and industrial environments.
Ambient temperature
  • Operating: -20 °C to +55 °C (-4 °F to +131 °F)
  • Storage: -40 °C to 70 °C (-40 °F to +158 °F)
Humidity < 95 %RH, non-condensing


LVD 2014/35/EC
EMC 2014/30/EC
RoHS 2011/65/EC