Safety Precautions

This instrument is designed, manufactured, and tested to meet IEC 61010 safety standards (safety requirements for electronic measuring products). This instruction manual includes warnings and safety regulations that users must follow to ensure the safe use and safe condition of the instrument. Please read the following instructions before use.

Warnings

The instrument outputs high voltage. Before use, read and understand the operating guidelines in this manual.
Keep this manual with you for easy reference.
The instrument must be used as instructed.
Understand and follow the safety operating instructions.

Strict adherence to the above operating instructions is mandatory.

Failure to comply may result in personal injury and damage to the instrument during measurement.

Danger (Indicates that improper operation may cause serious or fatal injury)

Wear insulated gloves before use.
Do not measure in circuits with AC/DC 600V or higher.
Do not test in flammable environments; sparks may cause an explosion.
Do not operate the instrument when the surface or the operator’s hands are wet.
Do not connect test leads while the instrument is energized.
Do not touch the circuit under test immediately during or after measurement, as this may result in electric shock.
Stop testing if dirt or carbon deposits that could damage the insulation properties are found on the test leads or ports.

WARNING (Indicates the possibility of serious or fatal injury due to improper operation)

Stop using the instrument if it malfunctions. For example, the instrument is damaged or has exposed metal parts.
Do not install replacement parts or make any unauthorized modifications to the instrument. Contact our company for repairs.
Ensure all test leads are securely connected to the instrument’s test ports.

Caution (Indicates the possibility of personal injury or instrument damage due to improper operation)

Before measurement, confirm that the voltage is selected at an appropriate value.
If not used for an extended period, fully charge the battery before storage and recharge it within three months.
Do not place the instrument in high temperature, humid conditions, areas where condensation is possible, or in direct sunlight for extended periods.
Clean the instrument casing with a damp cloth or detergent. Do not use abrasives or solvents.
If the instrument is damp, please dry it before storing it.

Features

This insulation resistance tester has five ranges: 250V, 500V, 1000V, 2500V, and 5000V, with a maximum testing capacity of 5TΩ. It also features a manual voltage boost function.

Designed strictly according to safety standards.
Insulation resistance range: 5TΩ@5kV
Adjustable short-circuit current, up to 5mA.
Automatically displays polarization index (PI) and absorption ratio (DAR) test values; can test leakage current and capacitance.
Excellent anti-interference performance; the instrument maintains testing accuracy even when the interference current reaches 2mA.
AC and DC voltage testing functions for the tested circuit; automatically identifies AC or DC.
Rapid discharge of capacitive samples; for cable testing, no manual discharge is required, as the instrument automatically discharges quickly.
Two power supply options: Lithium battery powered, providing up to 6 hours of runtime.
It can also be charged while in use. In the event of a power failure, it automatically switches from AC to battery power.
Full Chinese display and Chinese prompts for easy operation; straightforward; also displays the insulation resistance analog column.
Digital filtering function: uses filtering to mitigate the effects of external influences that cause deviations in the displayed value.
Comprehensive protection functions, including a fuse-blown indicator.

Technical Specifications

AC Power Supply: 220V±10%, 50/60 HZ, 20 VA
Battery Power: 16.8V Lithium-ion Battery
Battery Life: 5000V@100M, approximately 6 hours
Dimensions (L x W x H): 27cm x 23cm x 14cm
Weight: 3.8kg
Output Voltage Accuracy: 100% to 110% of nominal value
Output Voltage Monitoring Accuracy: ±5%±10V
Voltage Measurement Range: AC: 30-600V (50HZ/60HZ), DC: 30-600V
Voltage measurement accuracy: ±2%±3dgt
Current test range: 10mA
Current measurement accuracy: 5%+0.2nA
Short circuit current: 2 to 5mA, adjustable output
Capacitance test range: 15uF
Capacitance test accuracy: 15%+0.03uF
Capacitor discharge rate: From 5000V to 10V, 1S/µF
Insulation resistance test range and accuracy (Temperature: 23±5ºC, Relative Humidity: 45 – 75%RH)

Instrument Introduction

Panel Introduction

Description	Number	Explanation
AC Plug	2	AC Indicator Light
Test Terminals (E, G, L)	4	LCD Screen
Buttons	6

Button and function description

The buttons are numbered from left to right, a total of 5. The first one is the power button when the device is off.
Battery power indicator: When the battery voltage display shows only 1 bar remaining, charge the battery promptly. When the battery display flashes, it will automatically cut power at any time; you should charge it immediately.
Charging: Simply provide sufficient AC power to the panel’s AC socket to charge the instrument. During charging, the power indicator light will illuminate, and the battery indicator on the display will sequentially progress from (0 bars) to (full bar). When fully charged, it will display (full bar).
Contrast Setting Interface: Temperature changes can alter the LCD’s grayscale, potentially affecting usability. This instrument uses electronic contrast adjustment. Follow these steps:
- With the instrument powered off, press and hold button 2 (the second button).
- Press button 1 (power button) to turn on the instrument until you enter the contrast adjustment menu.
- Press button 1 or 2 to adjust the contrast until it is suitable.
- Press button 4 to save and exit. If no further adjustment is needed, press button 3 to exit.
System Help Menu Description
- Help: Records product number, production date, and version information.

Instrument Usage

Voltage Measurement:

Connect the L terminal of the instrument’s test lead to the test sample, and ground the E terminal.
Power on the instrument and check the displayed voltage. The instrument can automatically distinguish between DC and AC.
Regardless of whether it is DC or AC, if the voltage exceeds 10V, check if the circuit breaker of the tested circuit has tripped.

Absorption Ratio (DAR) Measurement:

Select a measurement duration greater than 1 minute.
Select an appropriate voltage and start the instrument.
The instrument automatically records the resistance values at 15-second and 60-second intervals, and calculates the absorption ratio after 60 seconds. Absorption Ratio Calculation Method: DAR = R60/R15.

Polarization Index (PI) Measurement:

Select a measurement duration greater than 10 minutes.
Select an appropriate voltage and start the instrument.
The instrument automatically records resistance values at 15, 60, and 600 seconds, and calculates the polarization index after 600 seconds. Polarization index calculation method: PI = R600/R60.

Test wiring precautions

Ensure the tested object is safely grounded and not energized.
Ensure the E terminal (grounding terminal) of the instrument is grounded.
Use of the G terminal (guard ring) (this machine is low-voltage side shielded)
- When measuring high insulation resistance, a conductor guard ring should be placed on the surface between the two measuring terminals of the test object. This conductor guard ring should be connected to the instrument’s G terminal with a test lead to eliminate measurement errors caused by leakage current at the test object’s surface and ensure accurate testing. Especially when calibrating the instrument, the G terminal should be connected to the G terminal of the resistance box to ensure regular calibration.