Introduction
This manual provides detailed instructions for the safe and effective use of your Proster Digital Multimeter, Model FS999L. This device is a versatile tool designed for measuring AC/DC current, AC/DC voltage, resistance, capacitance, frequency, temperature, continuity, and diode. It features a 6000-count True-RMS display, a 5.0-inch color screen, and a rechargeable lithium battery, making it suitable for a wide range of electrical and electronic applications.
Safety Information
Always adhere to safety precautions when using electrical testing equipment. Failure to do so may result in injury or damage to the device or equipment under test.
- This multimeter complies with CAT III 600V safety standards. Ensure the measurement range is appropriate for the circuit being tested.
- Do not attempt to measure voltages or currents exceeding the specified maximum limits.
- Inspect test leads for damage before each use. Replace if insulation is compromised.
- Ensure the multimeter is in the correct function mode before connecting to a circuit.
- Avoid touching exposed wires or circuit components while testing.
- Use caution when working with live circuits. If possible, de-energize the circuit before testing.
- Do not operate the multimeter if it appears damaged or is not functioning properly.
Package Contents
Verify that all items are present in the package:
- Proster Digital Multimeter (Model FS999L)
- Test Leads (Red and Black)
- Temperature Probe
- USB Type-C Charging Cable
- User Manual
Image: The Proster Digital Multimeter FS999L shown with its complete set of accessories, including the main unit, red and black test leads, a temperature probe, a USB Type-C charging cable, and the instruction manual.
Product Overview and Features
The Proster FS999L Digital Multimeter is equipped with advanced features for accurate and convenient measurements:
- Type-C Rechargeable Battery: Features a built-in 1000 mAh lithium battery, eliminating the need for frequent battery replacements.
- True-RMS 6000 Counts: Provides accurate readings for non-sinusoidal waveforms and offers high resolution with 6000 display counts.
- Auto/Manual Range: Supports both automatic and manual ranging modes for flexibility in various measurement scenarios. Includes automatic current jack recognition.
- 5.0-Inch Color Screen: A large, backlit color display ensures clear visibility of test data, even in dim conditions.
- Integrated Flashlight: Enhances usability in poorly lit environments.
- Comprehensive Measurement Functions: Measures AC/DC Current, AC/DC Voltage, Resistance, Capacitance, Temperature, Frequency, Continuity, and Diode.
- NCV (Non-Contact Voltage) & Live Wire Detection: For safe and quick identification of live electrical presence without direct contact.
- CAT III 600V Safety Rating: Built-in fuse overload protection and sturdy ABS material provide dual insulation protection for enhanced safety.
Image: The Proster Digital Multimeter FS999L, showcasing its compact design and the included test leads, temperature probe, and USB-C charging cable.
Image: An illustrative diagram highlighting the extensive range of measurement capabilities of the Proster Digital Multimeter, such as AC/DC Voltage, AC/DC Current, Resistance, Live Test, NCV, Flashlight, Capacitance, Frequency, Temperature, Diode, and Continuity.
Setup
Charging the Multimeter
The multimeter comes with a built-in rechargeable lithium battery. Before first use, or when the battery indicator shows low power, charge the device using the provided USB Type-C cable.
- Connect the USB Type-C end of the cable to the charging port on the multimeter (located on the back, protected by a silicone cover).
- Connect the USB-A end of the cable to a standard USB power adapter (not included) or a computer USB port.
- The battery indicator on the display will show charging status. Charge until the indicator shows a full charge.
Image: The Proster Digital Multimeter demonstrating its compact and portable design, along with an illustration of its 1000 mAh rechargeable lithium battery being charged via a USB-C cable.
Connecting Test Leads
Always ensure test leads are securely connected before taking measurements.
- Insert the red test lead into the 'VΩHz' or '10A' input jack, depending on the desired measurement.
- Insert the black test lead into the 'COM' (common) input jack.
Operating Instructions
Powering On/Off
- To power on, press and hold the power button until the display illuminates.
- To power off, press and hold the power button again. The multimeter also features an Auto Power Off function to conserve battery.
Automatic Measurement Mode
The FS999L features an intelligent automatic mode that simplifies measurements by automatically identifying the type of input (voltage, resistance, continuity) and selecting the appropriate range.
- When powered on, the multimeter typically defaults to auto mode.
- Connect the test leads to the circuit or component. The multimeter will automatically detect and display the measurement.
Manual Mode Selection
To cycle through specific measurement functions (e.g., AC/DC voltage, current, capacitance, temperature, etc.), repeatedly press the 'FUNC' or mode selection button. The display will indicate the currently selected function.
Image: An electrician utilizing the Proster Digital Multimeter, highlighting its 5.0-inch highly readable color screen and dual-line display, which provides clear readings even in dim conditions with its night backlight function.
Specific Measurement Functions
- Voltage Measurement (AC/DC): Connect leads in parallel to the circuit. Select AC or DC voltage mode if not in auto.
- Current Measurement (AC/DC): Connect leads in series with the circuit. Ensure the red lead is in the '10A' jack for high currents.
- Resistance Measurement: Ensure the circuit is de-energized. Connect leads across the component.
- Capacitance Measurement: Ensure the capacitor is discharged before testing. Connect leads across the capacitor.
- Frequency Measurement: Connect leads to the signal source.
- Temperature Measurement: Plug the temperature probe into the appropriate jacks and place the probe tip on the object to be measured.
- Continuity Test: For checking if a circuit is open or closed. The multimeter will emit an audible beep if continuity is detected.
- Diode Test: For checking the functionality of diodes.
- NCV (Non-Contact Voltage) Detection: Hold the top of the multimeter near a live conductor. The display will indicate voltage presence without direct contact.
- Live Wire Detection: Insert the red test lead into the 'VΩHz' jack and touch the probe to the suspected live wire. The display will indicate 'LIVE' if detected.
Data Hold Function
Press the 'HOLD' button to freeze the current reading on the display. Press again to release.
Flashlight
Press the flashlight button to turn on the integrated LED light for illuminating dark work areas. Press again to turn off.
Maintenance
Cleaning
Wipe the multimeter casing with a damp cloth. Do not use abrasive cleaners or solvents. Ensure the device is powered off and disconnected from any circuits before cleaning.
Battery Care
The built-in lithium battery should be recharged regularly, especially if the multimeter will not be used for an extended period. Avoid fully discharging the battery frequently to prolong its lifespan.
Storage
Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures. Keep it away from strong magnetic fields. It is recommended to store it with the test leads disconnected.
Troubleshooting
- No Display/Power: Ensure the battery is charged. Connect the USB-C cable and charge for at least 30 minutes. If the issue persists, contact support.
- Inaccurate Readings: Verify that the test leads are properly connected and not damaged. Ensure the multimeter is in the correct measurement mode for the circuit being tested. Check for external interference.
- NCV Not Sensitive Enough: The sensitivity of NCV can vary. Ensure you are holding the sensor close to the live conductor. For critical applications, always verify with direct contact measurement.
- Slow Readings: In automatic mode, the multimeter may take a moment to auto-range. For faster readings, consider switching to a specific manual mode if you know the expected range.
- Continuity Latching: If the continuity buzzer latches for too long, ensure the probes are fully separated and there is no residual charge in the circuit.
Specifications
| Feature | Specification |
|---|---|
| Model Number | FS999L |
| Display Counts | 6000 Counts |
| Display Type | 5.0 Inch Color Screen |
| Battery Type | 1000 mAh Rechargeable Lithium Battery (included) |
| Power Source | Corded Electric (via USB-C) |
| Safety Rating | CAT III 600V |
| Item Weight | 240 Grams |
| Parcel Dimensions | 21 x 11.9 x 4 cm |
| Country of Origin | China |
Image: The Proster Digital Multimeter in action across different scenarios, including home appliance repair, automotive circuit inspection, and laboratory maintenance, emphasizing its CAT III 600V safety rating and built-in fuse overload protection.
Warranty and Support
PROSTER products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official PROSTER website. Keep your purchase receipt as proof of purchase for warranty claims.
