Pro'sKit MT-7616 4-in-1 Fiber Optical Power Multimeter User Manual

1. Introduction

The Pro'sKit MT-7616 is a versatile 4-in-1 fiber optical power multimeter designed for comprehensive fiber optic and network cable testing. It integrates an Optical Power Meter (OPM), Visual Fault Locator (VFL), LAN Cable Tester, and LED Flashlight into a single, compact device. This manual provides detailed instructions for the safe and efficient operation, maintenance, and troubleshooting of your MT-7616 multimeter.

Figure 1: Pro'sKit MT-7616 4-in-1 Fiber Optical Power Multimeter and its retail packaging.

Figure 2: Front view of the Pro'sKit MT-7616 multimeter highlighting its four main functions.

2. Safety Information

Please read and understand all safety warnings and operating instructions before using this product. Failure to follow these instructions may result in injury or damage to the device.

• Laser Safety: The Visual Fault Locator (VFL) emits a visible laser. Do not stare directly into the laser beam or view it with optical instruments. Direct exposure can cause eye damage.
• Battery Safety: Use only the specified rechargeable Li-ion battery. Do not disassemble, crush, or expose the battery to extreme temperatures.
• Environmental Conditions: Operate the device within the specified working environment temperature and humidity ranges. Avoid exposure to water, dust, and corrosive substances.
• Maintenance: Refer all servicing to qualified personnel. Do not attempt to repair the device yourself.

3. Product Overview

The MT-7616 features a robust design with a protective rubber casing for durability and shock resistance. It includes a detachable remote unit for LAN cable testing.

3.1 Components and Controls

Figure 3: Detailed view of the MT-7616's integrated functions and ports.

• Optical Power Meter (OPM) Port: For measuring optical power. Supports ST/SC/FC and 2.5mm universal connectors.
• Visual Fault Locator (VFL) Port: Emits a red laser for fiber fault detection.
• LAN Cable Tester (RJ45) Ports: Main unit and detachable remote for UTP cable testing.
• LED Flashlight: Integrated light source for illumination.
• LCD Display: Shows measurement results, settings, and status.
• Control Buttons: ON/OFF, VFL, LED, Wavelength, REF, Save, ID, and numerical keys.
• Micro USB Charging Port: For recharging the internal Li-ion battery.

Figure 4: MT-7616's support for various fiber optic connectors.

4. Setup

4.1 Charging the Battery

The MT-7616 is equipped with a rechargeable 3.7V / 450mAh Li-ion battery. Before first use, fully charge the device.

• Connect the provided Micro USB cable to the charging port on the device.
• Connect the other end of the USB cable to a standard USB power adapter (e.g., wall charger, power bank, computer USB port, car charger).
• The battery indicator on the LCD will show charging status. A full charge typically takes approximately 3 hours.

Figure 5: Charging options for the MT-7616 via Micro USB.

4.2 Powering On/Off

Press and hold the ON/OFF button to power the device on or off.

5. Operating Instructions

5.1 Optical Power Meter (OPM) Function

The OPM measures optical power and loss across 10 wavelengths (850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm).

Figure 6: OPM display and controls.

1. Turn on the device. It will typically default to OPM mode.
2. Press the Wavelength button to cycle through the available wavelengths (nm).
3. Press the REF button to select the desired unit (dB, dBm, mW, uW, nW) or to set the current reading as a reference value for relative measurements.
4. Connect the fiber optic cable to the OPM port. The measurement will be displayed on the screen.

5.2 Visual Fault Locator (VFL) Function

The VFL emits a 650nm red laser to locate breaks, bends, and poor connections in fiber optic cables. The MT-7616 features a 30mW output for testing single-mode fibers up to 14-16km.

Figure 7: VFL port and control button.

1. Ensure the VFL port is clean and free of dust.
2. Connect the fiber optic cable to the VFL port.
3. Press the VFL button once for continuous laser output.
4. Press the VFL button a second time for flashing laser output.
5. Press the VFL button a third time to turn off the laser.

Figure 8: VFL in use for break point locating and continuity testing.

5.3 LAN Cable Tester Function

The LAN cable tester performs auto cable mapping for UTP cables (RJ45) up to 600 meters, identifying open circuits, short circuits, and cross-connections.

Figure 9: LAN cable testing with the MT-7616 and its remote unit.

1. Gently pull the remote unit from the main body of the MT-7616.
2. Connect one end of the RJ45 cable to the main unit's LAN port and the other end to the remote unit's LAN port.
3. Press the LAN button to initiate the cable test. The display will show the mapping results.
4. After testing, reattach the remote unit to the main body for storage.

5.4 LED Flashlight Function

The integrated LED flashlight provides illumination in dark environments.

Figure 10: LED flashlight in operation.

1. Press the LED button once to turn on the flashlight.
2. Press the LED button again to turn off the flashlight.

5.5 Data Storage

The MT-7616 can store up to 500 sets of measurement data. It also features wavelength memory, recalling the last used wavelength upon power-on.

Figure 11: Data storage and wavelength memory display.

• To save a measurement, press the SAVE button.
• To recall stored data, use the navigation buttons (if available, or refer to on-screen prompts).

5.6 Self-Calibration

The device supports self-calibration to maintain measurement accuracy.

Figure 12: Self-calibration procedure.

1. With the machine off, press and hold the ON/OFF and REF buttons simultaneously to enter offset setting mode.
2. Use the up/down buttons to adjust the setting within a ±5dB range.
3. Press the REF button to confirm the setting.
4. Press the Wavelength button to select the wavelength for calibration.

5.7 Backlight

The LCD backlight can be activated for better visibility in low-light conditions.

Figure 13: Backlight activation.

• Click the ON/OFF button to start the backlight function.

5.8 REF & Unit Switch

The device allows switching between different measurement units and setting a reference value.

Figure 14: REF and unit switching.

• Click the REF button to switch units and check settings.
• Press and hold the REF button to set the current value as a new reference.

6. Maintenance

6.1 Cleaning

• Keep all optical ports clean. Use a lint-free cloth and optical cleaning solution if necessary.
• Wipe the device exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.

6.2 Storage

• Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
• Ensure the protective caps are on all ports when not in use.
• If storing for extended periods, charge the battery periodically to maintain its health.

Figure 15: Protective features of the MT-7616.

7. Troubleshooting

• Device does not power on: Ensure the battery is charged. Connect to a power source and try again.
• Inaccurate OPM readings: Clean the optical port and fiber connectors. Perform self-calibration if necessary. Verify correct wavelength selection.
• VFL laser not visible: Check if the VFL function is activated (continuous or flashing mode). Ensure the fiber is properly connected and not severely damaged.
• LAN cable test errors: Ensure both ends of the cable are securely connected to the main unit and remote. Check the cable for visible damage.
• Battery drains quickly: Ensure the device is fully charged. Reduce backlight usage. Auto power-off is set to 10 minutes to conserve battery.

8. Specifications

Figure 16: Specifications table for MT-7615 and MT-7616.

9. Warranty and Support

For warranty information and technical support, please refer to the official Pro'sKit website or contact your local distributor. You can find more information at www.prokits.com.tw.

Figure 17: Diverse applications of the MT-7616.