Introduction
The GODIYMODULES Precision Voltage Reference Module is designed for accurate voltage and resistance calibration. It features low-temperature drift components and is powered via a Type-C 5V port, eliminating the need for a battery. This module provides five distinct voltage reference levels and five resistance reference levels, making it suitable for verifying the accuracy and linearity of digital multimeters.
Product Overview
Figure 1: Top-down view of the GODIYMODULES Precision Voltage Reference Module. This image shows the overall layout of the module, including the Type-C power input, DIP switches for selecting voltage, and output terminals.
The module incorporates an EMI filter for a cleaner power supply. It includes a green LED to indicate power status. The compact design (85x55x25mm) makes it convenient for various applications.
Setup and Connection
- Power Supply: Connect a 5V Type-C power source (0.5A minimum) to the Type-C port on the module. The green LED will illuminate to indicate power.
- Output Connection: Use appropriate test leads to connect your multimeter or device under test to the red (+) and black (-) output terminals on the module.
- Environment: For optimal accuracy, especially when verifying 4 1/2 digit multimeters, ensure the working environment maintains a stable temperature (16-30℃) and humidity (RH≤70%). Avoid direct airflow from air conditioners, which can introduce errors.
Figure 2: Close-up view of the module showing the Type-C power input and the DIP switches for selecting reference values.
Operating Instructions
Selecting Voltage Reference
The module provides five voltage reference levels: 1.24V, 2.5V, 5V, 7.5V, and 10V. These are selected using the DIP switches labeled 1 to 5. Each switch corresponds to a specific voltage level.
- Switch 1: 1.24V
- Switch 2: 2.5V
- Switch 3: 5V
- Switch 4: 7.5V
- Switch 5: 10V
Caution: Only one DIP switch for voltage selection should be in the "ON" position at any given time. Activating multiple voltage switches simultaneously is not permitted and may lead to incorrect readings or module damage.
Selecting Resistance Reference
The module provides five fixed resistance reference levels: 10Ω, 100Ω, 1KΩ, 10KΩ, and 100KΩ. These are available at dedicated terminals on the board. To measure a specific resistance, connect your multimeter to the corresponding resistance terminals.
Figure 3: View of the module highlighting the fixed resistance output terminals (10R, 100R, 1K, 10K, 100K).
Usage for Multimeter Calibration
- 3 1/2 Digit Multimeters: The module can be used to verify the accuracy and linearity of handheld 3 1/2 digit digital multimeters.
- 4 1/2 Digit Multimeters: For 4 1/2 digit digital multimeters, it is crucial to maintain the same temperature and humidity conditions as specified in the multimeter's data sheet for accurate verification.
Maintenance
- Cleaning: Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Storage: Store the module in a dry environment, away from extreme temperatures and humidity.
- Handling: Handle the module with care to avoid physical damage to components or connections.
Troubleshooting
- No Power Indication (Green LED Off):
- Ensure the Type-C power cable is securely connected.
- Verify that the 5V Type-C power source is functional and provides at least 0.5A.
- Incorrect Voltage Output:
- Check that only one voltage selection DIP switch is in the "ON" position.
- Ensure proper connection to the multimeter.
- Verify environmental conditions (temperature, humidity) for sensitive measurements.
- Unstable Readings:
- Operate in a low airflow environment to prevent temperature fluctuations.
- Avoid direct cold wind from air conditioners.
Specifications
| Feature | Specification |
|---|---|
| Product Name | Voltage Reference Module |
| Brand | GODIYMODULES |
| Power Supply | Type-C 5V port, 0.5A |
| No-load Power Consumption | 45mA |
| Power Indication | Green LED light |
| Reference Voltage Levels | 1.24V, 2.5V, 5V, 7.5V, 10V (5 levels) |
| Reference Resistance Levels | 10Ω, 100Ω, 1KΩ, 10KΩ, 100KΩ (5 levels) |
| Resistor Material | 0.1% Metal film copper feet & TCR: 25PPM |
| Dimensions (Clear Box Size) | 85mm x 55mm x 25mm |
| Net Weight | 34g |
| Working Environment | 16-30℃, RH≤70% |
Additional Resources
For a visual demonstration of a voltage reference module (note: this video may feature a similar but not identical product), please refer to the video below:
Video 1: Demonstration of a Voltage Reference Module. This video provides a general overview of how a voltage reference module might be used, including handling and basic operation. While the module shown may differ slightly from the GODIYMODULES model, it illustrates the general principles of such devices.
Warranty and Support
Specific warranty information for the GODIYMODULES Precision Voltage Reference Module is not provided in the product details. For warranty claims or technical support, please contact your retailer or the manufacturer directly.
