1. Introduction
Thank you for choosing the GOLDCHAMP 990B SMD Tweezers Meter. This device is designed for precise measurement of surface-mount device (SMD) components, offering functions such as resistance, capacitance, diode, and continuity testing. Its compact design and automatic features make it an ideal tool for electronics repair, manufacturing, and DIY projects.
This manual provides essential information for the safe and effective operation of your 990B SMD Tweezers Meter. Please read it thoroughly before use and retain it for future reference.
Figure 1: GOLDCHAMP 990B SMD Tweezers Meter and included accessories.
2. Safety Information
To ensure safe operation and prevent damage to the meter, please observe the following safety precautions:
- Always inspect the meter for any damage before use. Do not use if damaged.
- Do not apply voltage exceeding the maximum input rating (36V DC/AC) to the test pins.
- Ensure the device under test is de-energized before performing resistance, capacitance, or continuity measurements.
- Avoid touching the metal parts of the test pins during measurements to prevent electric shock.
- Replace batteries promptly when the low battery indicator appears to ensure accurate readings.
- Do not operate the meter in explosive atmospheres or in the presence of flammable gases or dust.
- Keep the device dry and clean.
3. Product Overview
The GOLDCHAMP 990B SMD Tweezers Meter features a clear LCD display and intuitive controls for efficient component testing. Below is a diagram illustrating the key components of the device.
Figure 2: Structure of the GOLDCHAMP 990B SMD Tweezers Meter.
Key Components:
- LCD Display: Shows measurement readings and indicators.
- HOLD Button: Freezes the current reading on the display.
- FUNC Button: Selects measurement functions (Resistance, Capacitance, Diode, Continuity, LED/Semiconductor Test).
- Function Switch: Rotary switch for selecting primary measurement modes (R/D/C, DC 36V, LED/Semiconductor Test).
- Test Pins (Gold-plated): Used to contact SMD components for measurement. Gold plating ensures better conductivity and durability.
- Pin Holder: Connects to external test leads for larger components or traditional multimeter use.
4. Setup
4.1 Battery Installation
The GOLDCHAMP 990B is powered by 1.5V (AAA) batteries. To install or replace batteries:
- Locate the battery compartment cover on the back of the meter.
- Slide the cover open.
- Insert the batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
4.2 Initial Power On
To turn on the meter, rotate the Function Switch to any desired measurement mode. The LCD display will illuminate, indicating the meter is ready for use. The meter features an auto power-off function after 15 minutes of inactivity to conserve battery life.
Figure 3: Package contents including the meter, case, test leads, and batteries.
5. Operating Instructions
The 990B SMD Tweezers Meter offers various measurement modes and smart functions for efficient testing.
5.1 Measurement Modes
The meter can perform the following tests:
- Resistance: Measures resistance from 400Ω to 40MΩ.
- Capacitance: Measures capacitance from 5.12nF to 200µF.
- Diode Test: Checks the forward voltage drop of diodes.
- Continuity Check: Indicates continuity with an audible buzzer if resistance is below a certain threshold (<30Ω).
- LED/Semiconductor Test: Tests LEDs and other semiconductors.
Figure 4: The 990B meter displaying its various measurement capabilities.
5.2 Performing Measurements
- Select Function: Rotate the Function Switch to the desired primary mode (R/D/C for Resistance, Diode, Capacitance, or LED/Semiconductor Test). Use the FUNC button to cycle through specific functions within that mode.
- Contact Component: Gently pinch the SMD component with the gold-plated test pins. Ensure good contact for accurate readings.
- Read Display: The measurement will be shown on the LCD display. The meter features auto-ranging, so it will automatically select the appropriate range.
- Hold Reading: Press the HOLD button to freeze the current reading on the display. Press again to release.
Figure 5: Examples of Resistance Measurement, Diode Test, Auto Range Test, and LED Test.
Figure 6: Using the 990B for accurate control and testing on a circuit board.
5.3 Smart Functions
- Auto-Range: The meter automatically selects the correct measurement range, eliminating the need for manual range selection.
- Auto Power-Off: The meter will automatically power off after 15 minutes of inactivity to save battery power.
- Relative Value Measurement: This function allows you to measure the difference between a stored reference value and the current measurement.
6. Maintenance
6.1 Cleaning
To maintain the accuracy and longevity of your meter:
- Wipe the meter with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Keep the test pins clean and free of debris to ensure good electrical contact.
6.2 Battery Replacement
When the low battery warning appears on the display, replace the batteries as described in Section 4.1. Always use fresh 1.5V (AAA) batteries.
6.3 Storage
When not in use for extended periods, remove the batteries to prevent leakage. Store the meter in its protective case in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity or replace with new batteries. |
| Low battery warning displayed. | Batteries are low. | Replace batteries immediately. |
| "OL" (Overload) indicator. | Measurement exceeds the meter's range. | Ensure the component value is within the meter's specifications for the selected range. |
| Inaccurate or unstable readings. | Poor contact with component, dirty test pins, or environmental interference. | Ensure firm contact, clean test pins, and perform measurements in a stable environment. |
| Auto power-off too soon. | Meter inactive for 15 minutes. | This is a normal function to save battery. Reactivate by pressing a button or rotating the switch. |
8. Specifications
The following table outlines the technical specifications of the GOLDCHAMP 990B SMD Tweezers Meter:
| Feature | Specification |
|---|---|
| Display Counts | 4000 |
| Resistance Range | 400Ω – 40MΩ |
| Capacitance Range | 5.12nF – 200µF |
| Diode Test Voltage | 1.5V |
| Continuity Check | <30Ω (audible buzzer) |
| DC Voltage Test (via Pin Holder) | 36V (Max) |
| Auto Range | Yes |
| Auto Power Off | 15 minutes |
| Overload Protection | Yes (OL indicator) |
| Low Battery Warning | Yes |
| Power Supply | 1.5V (AAA) battery |
| Dimensions | 207 × 36 × 24mm (8 x 2.8 x 1.3 inches) |
| Weight | 50g (2.4 ounces) |
| Material | ABS |
Figure 7: Comparison of GOLDCHAMP 990A and 990B models.
9. Warranty and Support
9.1 Warranty Information
The GOLDCHAMP 990B SMD Tweezers Meter comes with a 365-day warranty from the date of purchase, covering manufacturing defects. This warranty does not cover damage caused by misuse, accidents, unauthorized modifications, or improper operation.
9.2 Customer Support
If you have any questions regarding the operation, maintenance, or troubleshooting of your GOLDCHAMP 990B SMD Tweezers Meter, please do not hesitate to contact our customer support team. We are committed to providing assistance and ensuring your satisfaction.
