MY600 Digital Insulation Tester

The MY600 Digital Insulation Tester has enhanced operation compared to the conventional model, by using a shortened measurement time and color indicating judging function. This is a new concept in insulation testing and includes enhanced communication to a PC or tablet.

Insulation testing made simpler

  • Featuring enhanced measurement response times of 0.5 seconds and new functionallity for PASS/FAIL Judgement and Polarization Index and Dielectirc Absoprtion Ratio testing
  • Ability to log up to a 1000 data points to internal memory for offline analysis to a PC
  • Automatic LED backlight when working in remote areas with low visibility


Guaranteed reliability for every scenario

  • Large voltage generation and resistance measurement ranges to suit a wide variety of insulaiton types
  • Basic voltage measurement accuracy of +/- 1% of reading and resistance measurement of +/- 2% of reading with the ability to measure up to 4000 MΩ
  • Power off function that minimizes idle time and conserves battery life
  • Built-in auto-ranging for improved resolution at lower resistance levels
  • IP40 Protection Grade for enhanced ruggedness in harsh enviornments

Measurement Functions

  • Wide Insulation Test Voltages: 50V to 1,000 V
  • AC Voltage: 2 Vrms to 600 Vrms (45 to 65 Hz)
  • DC Voltage: +/- 2 to 600 Vdc
  • Low-Resistance: 40.00 to 4,000 Ω

Measurement Accuracy

  • Voltage (AC & DC): 0.1% of reading +/- 4 digits
  • Resistance: ±2.5% reading ±8 digit (0.20 to 4000 Ω) ±8 digit (0.00 to 0.19 Ω)

Other Features

  • Two colors for judging measurement results
  • USB Version 1.1 Compliant
  • Insulation Detioration Diagnosis
  • Automatic LED and Backlight
  • Line probe with switch

Two colors for judging measurement results

Set a desired reference value with the comparator function, and it will judge PASS (Green) or FAIL (Red) of a measurement result.


Approximately 0.5 s high-speed measurement*

The measurement time of insulation resistance is approx. 0.5 s, which contributes to reducing the operation time.
*Under the conditions specified by Yokogawa, it may take time to measure due to the influence of capacitive component of a measuring target.


USB Version 1.1 Compliant

PC communication is possible with the dedicated USB  communication adaptor (91030). Users can save as many as 1000  measurements to the internal memory from which data required for report generation, such as measurement data/time, measured value and range can be transmitted to a PC via communication.

91030 USB  communication adaptor (Sold separately)

Driver installation is required to use the 91030 USB communication adaptor.

Insulation deterioration diagnosis (PI and DAR measurement*)

The increase and decrease of resistance value can be measured by continuously measuring the insulation resistance for a prescribed time. The insulation deterioration of the unit under test can be diagnosed by this increase/ decrease. This parameter is useful for preventive maintenance of industrial automation equipment such as Magnetic Flow Meters or electrical equipment.
*PI: Polarization Index (Resistance after 10 minutes and Resistance after 1 minute)
DAR: Dielectric Absorption Rate (Resistance after 1 minute and Resistance after 15 seconds)


Auto lighting backlight and LED light

MY600 has a backlight that automatically lights up in a dark place, as well as an LED light to illuminate objects.

Auto lighting backlight and LED light


Line probe with switch

Users can turn measurement on/ off with the hand switch on the line probe, allowing them to work more efficiently. This probe is included with the unit.

Line probe with switch

Main Specifications 

Resistance Measurement Accuracy (tolerance): Within 1 year of shipment

Rated Measuring Voltage 50V 100V 125V 250V 500V 1000V
Maximum Effective Reading 100 MΩ 200 MΩ 250 MΩ 500 MΩ 2000 MΩ 4000 MΩ
First Effective Measuring Range 0.100 to 10.00 MΩ 0.100 to 20.00 MΩ 0.100 to 25.00 MΩ 0.100 to 50.00 MΩ 0.100 to 500 MΩ 0.100 to 1000 MΩ
Accuracy at First Effective Measuring Range ±2% reading ±2 digit
Second Effective Measuring Range 10.01 to 100 MΩ 20.01 to 200.0 MΩ 25.01 to 250.0 MΩ 50.1 to 500 MΩ 501 to 2000 MΩ 1001 to 4000 MΩ
Accuracy at Second Effective Measuring Range ±5% reading
Accuracy at 0.050 to 0.099 MΩ ±2% reading ±4 digit
Accuracy at 0.000 to 0.049 MΩ ±2% reading ±6 digit


Other Specifications

Accuracy (tolerance): Within 1 year of shipment

AC Voltage Measurement Range 2 Vrms to 600 Vrms (45-65 Hz)
DC Voltage Measurement Range ±(2.0 to 600) Vdc
AC/DC Voltage Measurement Accuracy ±1% reading ±4 digit
Low Resistance Measurement Range 40.00/400.0/4000 Ω (Auto range)
Low Resistance Measurement Accuracy ±2.5% reading ±8 digit (0.20 to 4000 Ω) ±8 digit (0.00 to 0.19 Ω)
Display 4000 Counts Digital Display
Built-in Functions PI/DAR, PASS/FAIL with indicator, USB communication, Auto LED light
Measurement Categories CAT III 600V
Protection Grade IP40


91030 USB communication adaptor

USB communication dedicated cable between PC and the main unit

Infrared communication adaptor and Communications cable (USB) 1 set.
CD contents: Communication driver, User’s manual, Install manual.

93045 Soft case

Main baby and accessoryhousing

98008 Line probe with remote switch

Length: 1.4 m, MY600 only

98009 Earth probe set

Length: 2.0 m, Earth probe and alligator clip adapters

99012 Probe tip (hook type)

Size: 61.9 × 26 mm

99018 Shoulder strap

For hanging the main body during measurement


Preventative maintenance is crucial to maintaining reliable plant operations and reducing costly downtime. As electrical cables are found everywhere in industrial plants, insulaiton testing is one of the many active measures used in this type of periodic equipment validation. Insulation testers ensure the integrity of electrical cables by measuring the quality of the conductivity state. By diagnosing insulation quality early on, you can prevent harmful leakage currents from destroying nearby equipment or harming your personnel. 


This application brief goes into how an insulation tester such as the MY600 can be used to maintain the integrity of magnetic flow meters. 

Instruction Manuals

Product Overviews

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