UEi IRT807 Insulation Resistance Tester User Manual

1. Introduction

This manual provides essential instructions for the safe and effective operation, maintenance, and troubleshooting of the UEi IRT807 Insulation Resistance Tester. Please read this manual thoroughly before using the device.

The IRT807 is a professional-grade insulation resistance tester designed for various electrical testing applications. It features multiple voltage testing ranges, advanced measurement capabilities, and a robust design for field use.

2. Safety Information

WARNING: To avoid electric shock or personal injury, follow these safety guidelines:

• Always adhere to local and national safety codes.
• Do not use the tester if it appears damaged or operates abnormally.
• Ensure test leads are in good condition and properly connected.
• Do not apply more than the rated voltage, as marked on the tester.
• The IRT807 is rated CAT IV 600V and CAT III 1000V. Always use appropriate Personal Protective Equipment (PPE).
• Do not operate the tester in explosive gas, vapor, or dust environments.
• Replace batteries when the low battery indicator appears to ensure accurate readings.

3. Product Overview and Contents

The UEi IRT807 is an advanced megohmmeter capable of measuring insulation resistance up to 2GΩ and voltage up to 1000V AC/DC. It includes features such as PI/DAR testing, continuity, and a clear LCD display with backlight.

3.1 Package Contents

The complete kit includes the following items:

• UEi IRT807 Insulation Resistance Tester
• Silicone test leads with alligator clips (red and black) (ATL57)
• Insulation test probe with alligator clips (red & black)
• K-Type thermocouple
• Soft carrying case
• 4 AA batteries
• User Manual

Image 1: UEi IRT807 Insulation Resistance Tester with included test leads, probes, thermocouple, soft carrying case, and manual.

Image 2: Front panel of the IRT807, highlighting its functions including True RMS, 1000V AC/DC, Resistance, Earth-bond resistance, Capacitance, Frequency, and features like Pi/DAR test, A-hold/Hold, Min/Max, rotary selector, protective rubber boot, kick stand, and test lead holders.

4. Setup

4.1 Battery Installation

1. Locate the battery compartment on the rear of the tester.
2. Use a screwdriver to open the battery compartment cover.
3. Insert the 4 AA batteries, observing correct polarity (+/-).
4. Replace the battery compartment cover and secure it with the screw.

4.2 Connecting Test Leads

1. Ensure the tester is OFF before connecting or disconnecting test leads.
2. Insert the red test lead into the "VΩ" input jack.
3. Insert the black test lead into the "COM" input jack.
4. For insulation testing, use the dedicated insulation test probe with alligator clips, connecting the red probe to the "INSULATION" jack and the black probe to the "COM" jack.

Image 3: The UEi IRT807 with red and black test leads connected to the appropriate input jacks.

5. Operating Instructions

5.1 Powering On/Off

Rotate the central selector switch from the "OFF" position to any desired measurement function to power on the device. To power off, rotate the switch back to "OFF". The device features auto power-off to conserve battery life.

5.2 Display and Controls

The IRT807 features an easy-to-read LCD display with a backlight for dark environments. Key controls include:

• SELECT: Toggles between measurement modes within a function (e.g., AC/DC voltage).
• MIN/MAX: Records minimum and maximum readings.
• RANGE: Manually selects measurement range.
• A-HOLD: Activates auto-hold function.
• TEST: Initiates insulation resistance test.
• PI/DAR: Initiates Polarization Index (PI) and Dielectric Absorption Ratio (DAR) tests.
• Backlight Button: Activates the display backlight and work light.

Image 4: A close-up view of the IRT807's LCD display and control buttons, including SELECT, MIN/MAX, RANGE, A-HOLD, TEST, and PI/DAR.

5.3 Insulation Resistance Testing

The IRT807 offers insulation resistance testing at 50V, 100V, 250V, 500V, and 1000V, with a range of 0.01MΩ to 2GΩ.

1. Ensure the circuit under test is de-energized and safely discharged.
2. Connect the insulation test probe (red) to the "INSULATION" jack and the black lead to the "COM" jack.
3. Connect the test probes to the circuit under test.
4. Rotate the selector switch to the desired insulation test voltage (e.g., "INSULATION 1000V").
5. Press the TEST button to initiate the test. The test voltage will be applied, and the insulation resistance will be displayed.
6. Release the TEST button to stop the test.

Image 5: The IRT807 displaying a reading during an insulation resistance test, with test leads connected to a component.

5.4 Voltage Testing (AC/DC)

The tester can measure voltage up to 1000V AC/DC.

1. Rotate the selector switch to the "V~" (AC Voltage) or "V-" (DC Voltage) position.
2. Connect the red test lead to the "VΩ" jack and the black test lead to the "COM" jack.
3. Connect the test leads in parallel to the circuit or component to measure voltage.
4. The voltage reading will be displayed on the LCD. Use the SELECT button to toggle between AC and DC if on a combined range.

5.5 Resistance and Continuity Testing

1. Rotate the selector switch to the "Ω" (Resistance) position.
2. Connect the red test lead to the "VΩ" jack and the black test lead to the "COM" jack.
3. Connect the test leads across the component to measure resistance.
4. For continuity, the tester will emit an audible tone if resistance is below a certain threshold.

5.6 PI/DAR Test

The Polarization Index (PI) and Dielectric Absorption Ratio (DAR) tests are used to assess the condition of insulation over time.

1. Perform steps 1-3 of Insulation Resistance Testing (Section 5.3).
2. Rotate the selector switch to an insulation test voltage.
3. Press the PI/DAR button. The tester will automatically perform the timed measurements and calculate the PI and DAR values.

5.7 Other Functions

• Capacitance: Rotate the selector to "Capacitance" and connect leads across the capacitor.
• Frequency (Hz): Rotate the selector to "Hz" and connect leads to the signal source.
• Hold: Press the A-HOLD button to freeze the current display reading.
• Zero: Used to zero out lead resistance for precise low-resistance measurements.
• Lock: Locks the insulation test button for continuous testing without holding the button.
• Compare: Allows setting a reference value for comparison during measurements.

6. Maintenance

6.1 Cleaning

Wipe the tester with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the device is dry before use.

6.2 Battery Replacement

When the low battery indicator appears on the display, replace the batteries as described in Section 4.1. Dispose of old batteries responsibly.

6.3 Storage

Store the tester in its soft carrying case in a cool, dry environment away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.

Image 6: The UEi IRT807 with its integrated kickstand extended, providing a stable viewing angle for hands-free operation.

7. Troubleshooting

If the UEi IRT807 is not functioning as expected, consider the following common issues and solutions:

• No Display/Power: Check battery installation and ensure batteries are not depleted. Replace if necessary.
• Inaccurate Readings: Ensure test leads are securely connected and not damaged. Verify the correct measurement function and range are selected.
• No Continuity Tone: Check if the circuit is open or if resistance is above the continuity threshold.
• Insulation Test Fails: Ensure the circuit is de-energized. Check for proper lead connection and test voltage selection.

If problems persist after attempting these steps, contact UEi Test Instruments customer support.

8. Specifications

9. Warranty and Support

9.1 Warranty Information

The UEi IRT807 Insulation Resistance Tester is backed by a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For full warranty terms and conditions, please refer to the warranty card included with your product or contact UEi Test Instruments directly.

9.2 Customer Support

For technical assistance, warranty claims, or service inquiries, please contact UEi Test Instruments customer support. Refer to the contact information provided in the product packaging or on the official UEi Test Instruments website.

Manufacturer: UEI TEST INSTRUMENTS