User Manual

Introduction

Thank you for purchasing the Smart Sensor AR3126 High Voltage Insulation Tester. This manual provides essential information on the proper use, measurement functions, and safety warnings for the device. To ensure optimal performance and safe operation, please read this manual thoroughly before use and keep it handy for future reference.

It is recommended to perform a test measurement to confirm the product is functioning correctly before any critical use.

Safety Warnings

Electricity is dangerous and can cause injury or death. Always follow safety precautions.

• This instrument is designed to meet safety standards: IEC 61010-1 CAT. III 600V (pollution level: 2), CAT. 5000V (pollution level: 2), IEC 61010-031 (test wire), IEC 61326-1 (EMC), and IEC 60529 (Ip40).
• Do not measure if the voltage exceeds 600V.
• Do not operate in flammable or explosive environments.
• Avoid using the device if it or your hands are wet.
• Do not exceed the specified measurement range of the tester.
• Do not open the battery compartment while performing measurements.
• Always turn off the unit after completing measurements.
• The tester should only be operated by qualified personnel who have received appropriate training.
• Do not open the device casing during testing. If the tester malfunctions, return it for repair.
• Avoid replacing batteries in humid conditions.
• Ensure all test wires are firmly connected to the tester.
• Always turn off the power before opening the battery compartment.
• Regularly inspect the tester for any damage, such as cracked lead wires or a broken casing. Do not operate if damage is found.
• Do not attempt any unauthorized alterations to the device. Contact your dealer for repairs.
• Do not touch the circuit under test immediately after testing, as stored capacitance can cause electric shock.
• Before performing insulation resistance measurements, ensure there is no residual electrical charge on the circuit using a high voltage detector.
• Wear insulated gloves when working with high voltage.
• Do not perform measurements during thunderstorms.
• Do not measure with the battery cover removed.
• Do not measure when the live circuit warning is active.

Product Overview

The Smart Sensor AR3126 is a multifunctional digital megohmmeter designed for high voltage testing, insulation resistance measurement, and voltage measurement. Below is a diagram illustrating the main components of the unit.

Unit Components:

1. LCD Display
2. Clear button
3. Time Set button
4. Press to Test / Lock button
5. Rotary Switch (for selecting 5000V, 2500V, OFF, AC.V, 500V, 1000V)
6. Up/Down buttons
7. Guard terminal
8. Earth terminal
9. Line terminal
10. USB port
11. Black testing wire and alligator clip
12. Green protective testing wire and alligator clip
13. Red Hi-volt testing wire

Package Contents

Carefully unpack your kit and ensure all the following items are present. If any item is missing or damaged, please contact your dealer immediately.

• High Voltage insulation tester: 1 pc
• English user's manual: 1 pc
• Warranty card: 1 pc
• Alligator clip: 2 pcs
• Test wire: 3 pcs
• USB connection cable: 1 pc
• Software CD: 1 pc
• 1.5V C type alkaline battery: 8 pcs
• Aluminum packing box: 1 pc

Specifications

Insulation Resistance Tester:

Voltage Tester:

General Specifications:

Setup

1. Battery Installation

1. Ensure the instrument is turned OFF.
2. Unscrew the four screws on the bottom panel and carefully open the battery door.
3. Insert 8 new 1.5V C type alkaline batteries, ensuring correct polarity (+/-) as indicated in the compartment.
4. Close the battery door and fasten the screws securely.

Refer to the battery replacement diagram on page 14 of the PDF user manual for visual guidance.

2. Software Installation (for PC Data Transfer)

System Requirements:

• CPU: Pentium III 600MHz or higher
• One spare USB port
• Monitor Resolution: 800x600, true color or better
• RAM: 8MB or more
• Hard Disk Space: 50MB or more
• Operating System: Microsoft Windows 98/ME/2000/XP Home/XP Professional (32Bit)

Installation Steps:

1. Insert the provided Software CD into your computer's CD drive.
2. Locate and double-click the "Setup.exe" program icon.
3. Follow the on-screen instructions of the InstallShield Wizard:
• Click "Next" to proceed.
• Enter your User Name and Company Name (e.g., PAG02 for User Name, ARCO for Company Name) when prompted, then click "Next".
• Select the "Complete" setup type (default) and click "Next".
• Click "Install" to begin the installation process.
• Once installation is complete, click "Finish" to exit the wizard. Shortcuts will be created on your desktop automatically.

3. Connecting Test Wires

1. Firmly insert the test wires into the corresponding connector terminals on the top of the instrument.
2. Connect the red test wire to the "LINE" terminal.
3. Connect the black test wire to the "EARTH" terminal.
4. Connect the green guard wire to the "GUARD" terminal.

Refer to the test wire connection diagram on page 15 of the PDF user manual for visual guidance.

Operating Instructions

1. LCD Display Overview

The LCD provides various indicators and measurement readings:

• Battery Mark: Shows current battery level (5 grades from sufficient to exhausted).
• Insulation Resistance Range Symbol: Indicates the current measurement range.
• Dynamic Bar Graph: Visually represents the insulation resistance.
• USB Data Transfer Symbol: Appears when connected to PC for data transfer.
• Set Time Symbol: Indicates timer setting mode.
• Timing Display Section: Shows elapsed time during timed measurements.
• Voltage/Insulation Resistance Display: Main area for numerical readings.
• Resistance Unit: MΩ (Megaohms) or GΩ (Gigaohms).
• Voltage Unit: V (Volts).
• Infinite Resistance Symbol (∞): Indicates resistance beyond the measurement range.
• Backlight Symbol (💡): Indicates backlight status.
• High Voltage Warning Symbol (⚡): Flashes when high voltage is present.
• Alternating Current Symbol (AC): Indicates AC measurement.
• Minus Symbol (-): Indicates negative polarity.
• Direct Current Symbol (DC): Indicates DC measurement.

Refer to the LCD Display section on page 9 of the PDF user manual for a detailed visual explanation.

2. Voltage Measurement (AC/DC)

1. Connect the red test lead and black test lead to the reciprocal terminal sockets on the instrument.
2. Set the function rotary switch to the "AC.V" position.
3. The voltage reading will be displayed on the LCD.
4. After measurement, remove the test pins from the circuit and set the function switch back to the "OFF" position.

Refer to the voltage measurement connection diagram on page 16 of the PDF user manual for visual guidance.

3. Insulation Resistance Measurement

1. Connect the red test wire and black test wire to the reciprocal terminal sockets.
2. Set the function rotary switch to the appropriate voltage (500V, 1000V, 2500V, or 5000V) based on the insulation material being tested. If unsure, you can try sequentially from lower to higher voltages.
3. Connect the test pin/clip to the unit under test.
4. Press and turn the "PRESS TO TEST" button clockwise to initiate a continuous measurement. The buzzer will sound, and the high voltage warning light will activate.
5. To stop the measurement, release the button. The instrument will automatically discharge the high voltage. The high voltage light and sound will cease.
6. Remove the test wires only when the LCD displays "0V".

Refer to the insulation resistance measurement connection diagram on page 18 of the PDF user manual for visual guidance.

4. Continuous Measurement

This function is similar to insulation resistance measurement but allows for continuous testing.

1. Follow steps 1-3 of the Insulation Resistance Measurement section.
2. Press and turn the "PRESS TO TEST" button clockwise to lock it in the continuous measurement position. The buzzer will sound, and the high voltage light will activate.
3. To stop the measurement, turn the "PRESS TO TEST" button anti-clockwise and release it. The instrument will discharge the high voltage, and the light/sound will stop.
4. Remove the test wires only when the LCD displays "0V", then set the function switch to "OFF".

5. Timer Measurement

This function allows for an automatic test duration.

1. Press the "TIME SET" button once. The "TIME1" mark will appear on the LCD.
2. Use the Up/Down buttons to set the desired measurement duration (e.g., 30 seconds).
3. Press and turn the "PRESS TO TEST" button clockwise. The buzzer will sound, and "TIME1" will flash.
4. The measurement will automatically complete after the set time. The high voltage light will turn off, the sound will stop, and the LCD will display the final result.

6. Polarization Index (PI) Measurement

The Polarization Index is calculated as the ratio of insulation resistance at two different time points (TIME2 / TIME1).

1. Press the "TIME SET" button once. The "TIME1" mark will appear. Set the first time point (e.g., 1 minute) using the Up/Down buttons.
2. Press the "TIME SET" button again. The "TIME2" mark will appear. Set the second time point (e.g., 10 minutes) using the Up/Down buttons.
3. Connect the test nip/clip to the insulation material under test.
4. Press and turn the "PRESS TO TEST" button clockwise. The buzzer will sound, and "TIME1" and "PI" will flash.
5. After the TIME1 duration, "TIME2" and "PI" will flash.
6. The LCD will display the insulation resistance values for both TIME1 and TIME2, along with the calculated Polarization Index.

Polarization Index Criteria:

• 4 or more: Very good
• 1.5 - 4: Good
• 1.0 - 1.5: Dubious
• 1.0 or less: Unsatisfactory

7. Using the Green Protect-Wire (GUARD Terminal)

The green protect-wire is connected to the GUARD terminal and is primarily used for measuring the insulation resistance of cables.

1. Connect the green protect-wire to the "GUARD" terminal on the instrument.
2. When measuring cable insulation resistance, nip the shield of the cable with the green protect-wire.
3. This helps to reduce the effect of leakage current, leading to more accurate measurements.

Refer to the green protect-wire connection diagram on page 10 of the PDF user manual for visual guidance.

8. PC Connection for Data Transfer

1. Connect the USB connection cable from the AR3126 tester's USB port to a spare USB port on your PC.
2. Once connected correctly, the software interface on your PC will display "connect OK", and the instrument will emit a "di" sound.
3. In the software, click "Download" to retrieve the measurement data. Voltage and resistance variation graphs will be generated simultaneously.
4. You can then save the measured data to an EXCEL file, print the data, or print the variation graphs.

Refer to the USB connection diagram on page 6 of the PDF user manual for visual guidance.

Maintenance

• Storage and Use Environment: Avoid storing or using the unit in locations with water splashes, high levels of dust, air with high salt or sulfur content, other corrosive gases or chemical materials, high temperature or humidity (above 50°C, 90%), or direct sunlight.
• Disassembly: Do not disassemble the unit or attempt internal alterations.
• Cleaning: Do not use alcohol or thinner to clean the unit casing, especially the LCD surface. Clean the unit lightly with a small amount of clean water as needed.
• Battery Removal: If the instrument will not be used for extended periods, remove the batteries to prevent damage from leakage to the battery compartment and electrodes.

Troubleshooting

• Screen is vacant after turning on: Check if the batteries are installed correctly and that their polarity (+/-) matches the indications in the battery compartment.
• Low battery indication (battery voltage below 8.5V ± 0.2V): Replace all 8 batteries with new 1.5V C type alkaline batteries to avoid incorrect readings.
• Instrument not functioning normally (e.g., cracked lead wire, broken casing): Do not operate the tester. Contact your dealer for repair. Do not attempt to repair it yourself.

User Tips

• Always perform a quick test to ensure proper functioning before critical measurements.
• Familiarize yourself with the LCD display symbols for quick interpretation of readings and device status.
• For accurate insulation resistance measurements, ensure the test environment is free from excessive humidity and extreme temperatures.
• When using the PC software, regularly back up your measurement data.

Warranty and Support

For detailed information regarding product warranties, please refer to the warranty card included with your purchase.

The manufacturer disclaims any liability for damages resulting from client's transportation, incorrect use or operation, unauthorized manipulation, alterations, or repair attempts, or the absence of a valid warranty card or invoice.

The manufacturer reserves the right to upgrade and amend the design of the product and update this manual without prior notification. Product specifications are subject to change.

Please dispose of used batteries in accordance with local laws and regulations.

A PDF version of this user manual is available for download: User Manual (PDF)