Metrel MI 3309 BT DeltaGT PAT Tester Instruction Manual

1. Introduction

The Metrel MI 3309 BT DeltaGT is a versatile, battery and mains-powered instrument designed for comprehensive electrical safety testing of portable electrical equipment. This manual provides essential information for the safe and effective operation, setup, and maintenance of your device.

Key features include integrated PRCD testing technology to prevent RCD tripping during measurements, dual power capability for differential leakage current tests, and a large graphical LCD with backlight for clear readability. The instrument supports storing up to 1500 test results for later analysis and report generation.

2. Safety Information

Always adhere to local safety regulations and guidelines when operating the MI 3309 BT DeltaGT. Failure to do so may result in injury or damage to the instrument.

• Ensure the instrument is in good working condition before each use.
• Do not use the instrument in wet conditions or in the presence of explosive gases or vapors.
• Only qualified personnel should perform electrical safety tests.
• Refer to the specific test procedures for correct connection and measurement techniques.
• Use only accessories supplied or approved by Metrel.

3. Package Contents

Verify that all items listed below are present in your package:

• Instrument MI 3309 BT DeltaGT
• Soft carrying bag
• IEC cable, 2 m, 2 pcs
• Test lead, brown, green, black, 1.5 m
• Crocodile clip, brown, green, black
• Test tip, brown, green, black
• PC software PATLink PRO
• RS232 cable
• USB cable
• Instruction manual (this document)
• Short instruction manual
• Calibration certificate
• NiMH rechargeable batteries, type AA, 6 pcs

Image: The Metrel MI 3309 BT DeltaGT PAT Tester shown with its complete set of accessories, including cables, test leads, clips, software, and carrying bag.

4. Product Overview

The MI 3309 BT DeltaGT is designed for efficient and accurate portable appliance testing. Its robust design and intuitive interface make it suitable for professional use.

Image: A close-up view of the Metrel MI 3309 BT DeltaGT PAT Tester, displaying its screen, control buttons, and input ports. The screen shows a "VISUAL INSPECT" prompt.

Key Features:

• Dual Power Capability: Operates from both mains power and internal NiMH rechargeable batteries.
• Large Graphical LCD: Features a backlight for clear visibility in various lighting conditions.
• PASS / FAIL Indicators: Two prominent LED indicators (green/red) provide immediate test result feedback.
• Help Screens: Integrated help screens for each measurement guide the user through testing procedures.
• Data Storage: Internal memory stores up to 1500 test results with parameters.
• PC Connectivity: USB and RS232 ports for data download to PC software (PATLink PRO) for analysis and report generation.
• Autosequencing: Supports pre-programmed VDE compatible autosequences and up to 50 custom autosequences for efficient testing.
• PRCD Testing: Unique technology prevents tripping of mains RCDs during testing.

5. Setup

5.1. Battery Installation and Charging

1. Locate the battery compartment on the rear of the instrument.
2. Insert the 6 supplied AA NiMH rechargeable batteries, ensuring correct polarity.
3. Close the battery compartment securely.
4. Connect the instrument to mains power using the provided IEC cable to charge the batteries. The charging indicator will illuminate.

5.2. Initial Power On

Press the power button to turn on the instrument. The display will show the startup screen. Follow any on-screen prompts for initial setup, such as language selection or date/time settings.

5.3. Connecting Test Leads

Connect the appropriate test leads (brown, green, black) and accessories (crocodile clips, test tips) to the designated input terminals on the instrument as required for the specific test being performed.

6. Operating Instructions

The MI 3309 BT DeltaGT offers a range of tests for portable appliance safety. Navigate through the menus using the arrow keys and confirm selections with the appropriate button (e.g., 'MEM' or 'ESC' for back).

6.1. Functional and Visual Inspection

Before any electrical tests, perform a thorough visual inspection of the appliance and its power cord for any damage, wear, or incorrect wiring. The instrument may prompt for visual inspection steps.

6.2. Earth Bond Resistance Test

This test measures the resistance of the protective earth conductor. Connect the earth bond test lead to the appliance's accessible metal parts and follow the on-screen instructions.

6.3. Insulation Resistance Test

Measures the insulation resistance between live conductors and the protective earth, or between live conductors and isolated accessible conductive parts. Ensure the appliance is disconnected from mains power before performing this test.

6.4. Leakage Current Tests

The instrument supports various leakage current tests:

• Substitute Leakage Current: A non-mains powered test to simulate leakage.
• Differential Leakage Current: Measures the difference in current between live and neutral conductors.
• Touch Leakage Test: Measures current flowing through a person touching the appliance.

6.5. RCD and Portable RCD Testing

Tests the tripping time and current of Residual Current Devices (RCDs) and portable RCDs (types K, S). Connect the instrument to the RCD and follow the specific test sequence.

6.6. Power Test and IEC Cord Polarity Test

Measures the power consumption of the appliance and verifies the correct polarity of IEC cords.

6.7. Autosequencing

Utilize pre-programmed or custom autosequences to streamline testing. Select the desired autosequence from the menu and follow the prompts. This ensures all necessary tests are performed in the correct order.

6.8. Data Management

Test results are automatically stored in the internal memory. To download data, connect the MI 3309 BT DeltaGT to a PC using the USB or RS232 cable and use the PATLink PRO software.

7. Maintenance

7.1. Cleaning

Clean the instrument's casing with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure no moisture enters the instrument.

7.2. Battery Care

For optimal battery life, fully charge the NiMH batteries regularly. If the instrument will not be used for an extended period, remove the batteries to prevent leakage.

7.3. Calibration

Regular calibration by an authorized service center is essential to maintain the accuracy and reliability of the instrument. Refer to the calibration certificate for recommended intervals.

7.4. Software Updates

Check the Metrel website periodically for software updates for the MI 3309 BT DeltaGT and PATLink PRO software to ensure optimal performance and access to new features.

8. Troubleshooting

This section addresses common issues you might encounter. For more complex problems, contact Metrel technical support.

• Instrument does not power on: Check battery charge level or mains power connection. Ensure batteries are correctly inserted.
• Inaccurate readings: Verify test lead connections. Ensure the instrument is calibrated. Check for damaged test leads or accessories.
• Display issues: Adjust backlight settings. If the display remains blank or distorted, contact support.
• Data transfer failure: Ensure correct USB/RS232 cable connection. Verify PATLink PRO software is installed and running correctly. Check device drivers.
• RCD tripping during test: Ensure PRCD testing technology is enabled or check the appliance for excessive leakage.

9. Specifications

10. Warranty and Support

The Metrel MI 3309 BT DeltaGT comes with a two-year (24 Month) warranty from the manufacturer. Please retain your proof of purchase for warranty claims.

For technical support, service, or warranty inquiries, please contact your authorized Metrel distributor or visit the official Metrel website for contact information.

Image: The official Metrel company logo, featuring a stylized blue and grey design.