YOKOGAWA MY600 Digital Insulation Resistance Tester

Key parameters:

Open circuit voltage: 100-110% of rated voltage.

Short circuit current: ≤ 1.5mA (1000V range) to ensure measurement safety.

Accuracy: First effective range (such as 1000V range 0.100~1000M Ω) ± 2% reading ± 2 digits; Second effective range (1001~4000M Ω) ± 5% reading.

Featured Features:

Automatic discharge: After measurement, keep the probe connected, and the instrument will automatically release the charge of the measured capacitor load. Before the discharge is completed“ ⚠️”  Flashing and buzzing.

Pass/Tail judgment: A reference value (0.001~4199M Ω) can be set. When the measured value is ≥ the reference value, the backlight flashes green and "PASS", otherwise it flashes red and "FAIL".

DAR/PI calculation: Automatically calculate the dielectric loss absorption ratio (DAR=1 minute value/15 second value) and polarization index (PI=10 minute value/1 minute value), ranging from 0.00 to 9.99, with ">9.99" displayed if out of range.

Operation steps:

Connect the probe, confirm that the tested device is powered off, and verify that there is no power using voltage measurement.

Turn the range switch to the corresponding rated voltage level (long press SELECT to switch between 125V/100V levels).

Connect the probe to the device under test, and simultaneously press the instrument's "measurement switch" and the probe's "remote switch" to start measuring (continuous measurement requires locking the measurement switch).

After the measurement is completed, wait for the automatic discharge to end before removing the probe.

(3) Low resistance measurement (on-off check)

Range and Range: Automatic Range (40.00 Ω/400.0 Ω/4000 Ω), Measurement Range 0.00-4199 Ω, Over Range Display ">4199 Ω".

Key parameters:

Open circuit voltage: DC 4~6.9V.

Measurement current: below 2 Ω ≥ 200mA, when the current is ≥ 200mA, a buzzer will sound to indicate on/off.

Accuracy: 0.20-4000 Ω± 2.5% reading ± 8 digits; 0~0.19 Ω± 8 digits (0 Ω calibration needs to be performed first).

Featured feature: 0 Ω calibration (can counteract probe and fuse resistance, up to 3 Ω), ensuring low resistance measurement accuracy.

Operation steps:

Turn the range switch to "V/Ω" and press SELECT to switch to low resistance mode.

Short circuit the probe, long press the "0 Ω ADJ" button to perform calibration (display "0.00 Ω" and light up the "0 Ω" indicator light).

Connect the probe to the tested circuit, press the measurement switch, and display the resistance value (beep when the current is ≥ 200mA).

2. Auxiliary functions

Backlight and LED lights: The illuminance sensor automatically detects the ambient brightness, automatically turns on the backlight and measurement point LED lights when dim, and automatically turns off after 2 minutes of inactivity; It can also be manually set to be normally off.

Automatic shutdown: Automatic shutdown after 10 minutes of inactivity (disabled during measurement or when the measurement switch is locked), with a warning beep before shutdown.

Clock settings: Year/month/day/hour/minute can be set, measurement data is automatically associated with timestamps, and there is a built-in lithium battery backup clock (with a lifespan of about 10 years).

Memory function: can store 1000 sets of measurement data (voltage/insulation resistance/low resistance), including DAR/PI, time, range and other information; Support data viewing and deletion (single/all), and transfer to PC through USB adapter.

System Settings and Data Management

1. Function configuration (long press SETUP to enter configuration mode)

Pass/Tail reference value: Set the judgment threshold for each voltage level, supporting preset values (such as default 0.5M Ω for 500V level) or custom values (0.001-4199M Ω).

Backlight/LED lights: Set to "ON" (automatic start stop) or "OFF" (normally off).

Buzzer: Set "ON" (live warning, discharge, on/off prompt) or "OFF" (turn off all beeps).

Clock calibration: Adjust the year/month/day/hour/minute to ensure accurate data timestamps.

2. Data management

Storage: When holding the measurement value, press the MemoRY button briefly to set the site number (SITE No.1/2, 0~99) and data number (automatically increasing) to complete the storage.

View: Press and hold the Memory button during standby time, select the data number using the directional keys, and view the measured values and station information.

Delete: When viewing data, select the number (or "ALL") and press ENTER to confirm the deletion (single or all).

Transmission: Connect to the PC via USB communication adapter (91030), install the driver, and export data using commands (refer to IM 91030-01EN manual).

Maintenance and repair

1. Daily maintenance

Battery management: When the battery level is low, the "battery icon" displays "empty" and needs to be replaced in a timely manner (4 AA alkaline batteries); Long term disuse requires removing the battery to avoid leaking and damaging the instrument.

Cleaning: Wipe the outer shell with a dry soft cloth, and do not use abrasives or solvents; The surface of the illuminance sensor needs to be kept clean to avoid affecting the automatic backlight/LED function.