YOKOGAWA MY600 Digital Insulation Resistance Tester

YOKOGAWA MY600 Digital Insulation Resistance Tester

Product positioning and core functions

MY600 is a compact digital insulation resistance tester designed to measure the insulation resistance of electrical equipment or circuits. It supports voltage measurement (AC/DC) and low resistance on/off inspection, and is portable, high-precision, and adaptable to multiple scenarios. It is widely used in fields such as power equipment maintenance, electrical installation acceptance, and industrial circuit testing.

Packaging and Accessories

1. Standard accessories (included with the product)

After opening the box, it is necessary to confirm that the following accessories are intact. If they are missing or damaged, please contact the Yokogawa distributor:

Accessory Name Model/Part Number Quantity Usage

Portable case 93045 1 for storing instruments and accessories, easy to carry

Line probe with remote switch 98008 1 connected to LINE terminal for line side measurement

Grounding probe group 98009 1 is connected to the EARTH terminal for measuring the grounding side

Shoulder strap 99018 1 hanging instrument, supports dual hand operation

Alkaline dry battery -4 instrument power supply (AA alkaline battery recommended)

User manual set IM MY600-01EN/92Z1/00C01C01-01Z2/PIM113-01Z2, each containing multilingual instructions and global contact information

2. Optional accessories (to be purchased separately)

According to the requirements of the measurement scenario, it is necessary to ensure that the accessories meet the rated parameters of the instrument:

Accessory Name Model/Part Number Usage

USB communication adapter 91030 is used to connect to a PC and transfer measurement data from memory

Hook probe tip 99012 replaces standard probe, suitable for special wiring scenarios

Long probe tip 99013 deep into narrow spaces for measurement, expanding measurement range

Safety regulations

1. Core safety warning (to avoid electric shock/equipment damage)

Laser and high voltage protection: When measuring insulation resistance, there is high voltage at the tip of the probe, and touching the probe or the tested circuit is prohibited; After measurement, wait for automatic discharge to complete（“ ⚠️”  Symbol flashing+buzzing), then touch the circuit.

Measurement category restriction: The rated measurement category of the instrument is CAT III 600V, and it is prohibited to use it for CAT IV or main power circuits exceeding 600V; When the probe is paired with different accessories, the category is different (for example, 98008 with insulation cap is CAT III 600V, and without cap is CAT II 1000V).

Requirements for the tested equipment: Before measurement, the power supply of the DUT must be cut off, and the voltage measurement function must be used to confirm that there is no power before starting; Do not measure live circuits to avoid instrument damage or electric shock.

Equipment status check: If the instrument casing is damaged, the probe cable is exposed, or the battery compartment is damp, use is prohibited; After falling or colliding, it is necessary to contact the dealer for maintenance to avoid insulation protection failure.

2. Operation safety rules

Battery replacement: Before replacing, power off and remove the probe. It is forbidden to open the battery compartment during measurement; New batteries of the same type should be used to avoid mixing old and new/different models.

Environmental restrictions: Do not use in flammable gas, humid (with condensation) or outdoor rainy environments; Working temperature range -10~+50 ℃, storage temperature -20~+60 ℃, avoid direct sunlight.

Probe usage: Only Yokogawa designated probes can be used, damaged or aged probes should be replaced in a timely manner; Before connecting/disassembling the probe, it is necessary to disconnect it from the device being tested.

Core functions and operating procedures

1. Measurement mode and parameters

The instrument supports three core measurement modes, and the parameters and applicable scenarios for each mode are as follows:

(1) Voltage measurement (AC/DC automatic detection)

Range and Range: Automatic range (300.0V/600V), measurement range AC 2.0~600V (45~65Hz), DC ± 2.0~± 600V, over range display ">629V" (AC/positive DC) or "<-629V" (negative DC).

Accuracy: ± 1% reading ± 4 digits (23 ℃± 5 ℃, RH ≤ 80%), AC detected using true RMS, non sinusoidal (CF<2.5) requires an additional ± 1% error.

Operation steps:

Connect the line probe (98008) to the LINE terminal, and connect the ground probe (98009) to the EARTH terminal.

Set the range switch to "V/Ω" and connect the probes to the line side and ground side of the tested circuit.

No need to press the measurement switch, the instrument automatically detects AC/DC and displays the value (triggering a live warning when ≥ 30V:“ ⚠️”  Blinking and buzzing.

(2) Insulation resistance measurement (core function)

Rated voltage and range: Supports six rated voltages of 50V/100V/125V/250V/500V/1000V, with automatic range switching (such as 1000V range of 4~4000M Ω), and a fixed value displayed for exceeding the range (such as>4199M Ω).