Megger IDAX322-Idax322 Megger Insulation Diagnostic Analyser

Megger IDAX322-Insulation Diagnostic analyser idax322 megger is a high voltage insulation diagnostic instrument based on DFR.

(1 customer review)
SKU: 4205

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Megger Idax322 Insulation Diagnostic Analyser

DFR stands for Dielectric Frequency Response. The test is also known as FDS (Frequency Domain Spectroscopy). DFR is a measurement technique in which capacitance and loss (expressed as dissipation factor/tan delta or power factor) are measured over a variety of frequencies to assess insulation status in test objects. experiments, such as power transformers, bushings, and instrument transformers.

DFR technology is an established laboratory testing process that, through Megger’s innovative efforts, has been adapted for field use through the IDAX family of devices. In transformers, bushings, and instrument transformers, faults are often invisible under conditions where diagnostic tests are easy to perform (usually at room temperature and line frequency).

In contrast, problems are often better exposed to temperatures higher or closer to the operating limits of objects. Unfortunately, the temperature is not easily or effectively controlled in the field test environment. The strength of the DFR test as tan delta or power factor is the basis of the measurements. Tan delta or power factor is mainly a function of insulation system geometry, aging byproducts, humidity, insulation fluid conductivity, frequency, and temperature.

By leveraging the knowledge of these relationships, the assessment of aging by-products, moisture, and conductivity can be performed in the frequency domain, via DFR, rather than in the frequency domain. in the temperature, the domain is much more difficult to control. Therefore, DFR makes it easier to find insulation problems under conditions that can be easily achieved in the field.

Megger IDAX 322 Features

  • State-of-the-art high voltage Dielectric Frequency Response (DFR) instrument tailored for field testing of power transformers, bushings, and many other test objects.
  •  Instruments and accessories designed for the most demanding field conditions
  •  2 kV peak and 50 mA capacity – ideal for low capacitance objects such as bushings and instrument transformers
  •  Best hardware and specifications for the most accurate results
  •  Dual ammeters for two simultaneous measurements
  •  Easy-to-use software with assessment guidance by standards and 25+ years of field experience with DFR technology


  • General
  • Mains voltage: 100 – 240V ±10%, 50 / 60 Hz
  • Power consumption 180 VA (max)
  • Dimensions:
    420 x 480 x 220 mm (16,5″ x 18,9″ x 8,66″)
  • Weight:
    IDAX 322 unit 13 kg (28 lbs)
    Lead backpack 10 kg (22 lbs)
  • Measurement section
  • Inputs: Red, blue, ground
  • Capacitance range: 10 pF – 100 μF
  • Accuracy: 0.5% + 1 pF
  • Tan delta range: 0 – 100 (with retained accuracy of
  • Calibration
    Field calibration is Possible with IDAX Calibration Box CAL300 (AG-90010)
  • Time domain current measurement (PDC)
  • Range ±50 mA
  • Resolution: 0.1 pA
  • Accuracy: 0.5% ±1 pA
  • Input resistance (DC mode): ≤10 kΩ  


1 review

1 review for Megger IDAX322-Idax322 Megger Insulation Diagnostic Analyser

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  1. Weston

    as I expected

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Megger since 1889 is a leading global premium manufacturer of measurement and testing technology. Megger top priority has always been to make your everyday work easier and safer. As such, insulation testers, micro-ohmmeters, and multimeters are among the long line of Megger inventions, making this brand one of the pioneers in the electrical industry. Megger products combine many years of experience and the valued feedback from our global users with the inventiveness and conscientiousness of our product developers. In Germany, we manufacture at three sites, Aachen, and Baunach near Bamberg and Radeburg near Dresden. Other manufacturing locations are based in Sweden, England, and America.



Data Sheet


Category Specification Details
General Mains Voltage 100 – 240V ±10%, 50 / 60 Hz
Power Consumption 180 VA (max)
Dimensions 420 x 480 x 220 mm (16.5″ x 18.9″ x 8.66″)
Weight – IDAX 322 Unit 13 kg (28 lbs)
Weight – Lead Backpack 10 kg (22 lbs)
Measurement Section Inputs Red, Blue, Ground
Capacitance Range 10 pF – 100 μF
Accuracy 0.5% + 1 pF
Tan Delta Range 0 – 100 (with retained accuracy of calibration)
Field Calibration Possible with IDAX Calibration Box CAL300 (AG-90010)
Time Domain Current Measurement (PDC) Range ±50 mA
Resolution 0.1 pA
Accuracy 0.5% ±1 pA
Input Resistance (DC Mode) ≤10 kΩ