1. Introduction
The RuoShui 8045mini is a high-precision desktop digital multimeter featuring 30000 counts, a dual display, USB communication capabilities, and intelligent protection. Designed for a wide range of electrical testing and analysis, this instrument offers reliable and accurate measurements for professionals and enthusiasts alike.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1x Host (RuoShui 8045mini Digital Multimeter)
- 1x Color Box
- 1x Instruction Manual
- 1x Certificate of Conformity
- 1x USB Data Cable
- 1x Type-C Charging Cable
- 1x Test Probe (Red and Black)
- 1x K-type Temperature Probe
3. Setup
3.1 Powering the Device
The RuoShui 8045mini is powered by built-in rechargeable lithium batteries (2 × 18650) and can also be powered via an external 5V Type-C power supply. To charge the device or operate it using external power:
- Connect the provided Type-C charging cable to the Type-C interface on the side of the multimeter.
- Connect the other end of the Type-C cable to a compatible 5V power adapter (not included).
- The indicator light will show charging status.
3.2 Panel Overview
Familiarize yourself with the front and back panels of the multimeter:
- Display screen
- Menu selection key
- Operation key
- Range/direction key
- Power button
- Measurement function button
- Signal input terminal (10A, uAmA, COM, INPUT)
- USB Device Communication Interface
- External Power Interface
- Indicator Light
4. Operating Instructions
4.1 Basic Operation
- Power On/Off: Press the Power button (5) to turn the device on or off.
- Function Selection: Use the Measurement function buttons (6) to select the desired measurement mode (e.g., V for voltage, A for current, Ω for resistance, Temp for temperature, Freq for frequency).
- Range Selection: The multimeter features an Auto Range function. If manual range selection is needed, use the Range/direction key (4).
- Connecting Probes: Insert the red test lead into the 'INPUT' terminal and the black test lead into the 'COM' terminal for most measurements. For high current measurements (up to 10A), use the '10A' terminal. For micro/milliampere measurements, use the 'uAmA' terminal.
4.2 Measurement Functions
The RuoShui 8045mini supports a variety of measurement functions:
- DC Voltage (DCV): Measures direct current voltage.
- AC Voltage (ACV): Measures alternating current voltage.
- DC Current (DCA): Measures direct current.
- AC Current (ACA): Measures alternating current.
- Resistance (Ω): Measures electrical resistance.
- Capacitance (F): Measures capacitance.
- Frequency/Duty Cycle (Hz): Measures frequency and duty cycle.
- Temperature (Temp): Measures temperature using the K-type temperature probe.
- Diode Testing: Checks the forward voltage drop of diodes.
- Continuity (On-off Testing): Checks for continuity in a circuit with an audible alert.
4.3 Advanced Functions
-
Dual Display Function: The 3.5-inch TFT screen can display results of two measurement functions simultaneously. In ACV/ACA test mode, the accompanying frequency sub-display of the AC signal can be selected.
Figure 5: Dual display showing main and secondary measurements. - Recorder Function: Supports automatic/manual recording of up to 255 points. Automatic recording time step is adjustable from 1.0s to 10.0s.
- Mathematical Operations: Perform mathematical operations on measurement results, including dB/dBm, or relative value operations.
-
USB Communication: Connect the multimeter to a computer via the USB Device Communication Interface (8) for remote control and data transfer.
Figure 6: Auxiliary system functions, including USB communication. -
Auxiliary System Functions:
- Switchable display language.
- Adjustable backlight brightness.
- Can set timed shutdown time.
5. Maintenance
5.1 General Care
- Keep the multimeter clean and dry. Wipe the casing with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
- Store the device in a safe place when not in use to prevent physical damage.
5.2 Battery Care
- Recharge the built-in lithium batteries regularly to maintain their lifespan.
- If the device will not be used for an extended period, ensure it is fully charged before storage and periodically recharged.
5.3 Fuse Replacement
The multimeter contains built-in fuses for protection (600mA 250V 5×20mm and 10A 250V 5×20mm). If a fuse blows, it must be replaced with a fuse of the same type and rating. Fuse replacement should only be performed by qualified personnel to ensure safety and proper function.
6. Troubleshooting
If you encounter issues with your RuoShui 8045mini, please refer to the following common problems and solutions:
- Device does not power on: Ensure the batteries are charged or connected to a 5V Type-C power supply. Check the power button.
- No reading or incorrect reading: Verify that the test leads are correctly inserted into the appropriate input terminals (INPUT, COM, 10A, uAmA) for the selected function. Ensure the function mode is correctly selected. Check for proper contact between probes and the circuit.
- "Overload" displayed: This indicates that the input signal exceeds the selected range or the maximum input limit of the multimeter. Disconnect the probes immediately and select a higher range or a different function if necessary.
- USB communication issues: Ensure the USB data cable is securely connected to both the multimeter and the computer. Verify that the necessary drivers are installed on your computer.
If the problem persists, please contact customer support for assistance.
7. Specifications
7.1 General Characteristics
| Feature | Description |
|---|---|
| Display screen | 3.5-inch TFT display, resolution 480 * 320 |
| Measuring accuracy | 30000 words |
| Operating temperature | 0℃-40℃ |
| Storage temperature | -25 ℃ to 50 ℃ |
| Relative humidity | ≤ 90% 5-28 ℃ (non condensing), ≤80% 28-40℃, ≤70% 10-40 ℃ (for high resistance ranges above 300KΩ) |
| Temperature coefficient | ≤ basic accuracy ×0.1/℃ (5-18 ℃, 28-40℃) |
| Altitude | Not exceeding 2000m |
| Product power supply | Built-in rechargeable lithium batteries (2 × 18650) / TYPE-C 5V power supply |
| Electromagnetic compatibility | Compliant with EMC directive and standard EN 61326-1 |
| Security | Compliant with low voltage directive and standard EN 61010-1 |
| Configuration interface | USB Device |
| Soak time | 15 minutes |
| Dimensions | 200 × 90.64 × 62mm |
| Weight | About 440g |
| Current fuse | 600mA 250V 5×20mm (built-in) / 10A 250V 5×20 (built-in) |
| Pollution level | 2 |
7.2 Measurement Ranges and Accuracy
Detailed ranges, resolutions, and accuracies for various measurement functions are provided below:
DC Voltage (DCV)
| Range | Resolution | Accuracy |
|---|---|---|
| 300.00mV | 0.01mV | ±(0.1%+5) |
| 3.0000V | 0.0001V | ±(0.05%+5) |
| 30.000V | 0.001V | ±(0.05%+5) |
| 300.00V | 0.01V | ±(0.5%+10) |
| 1000.0V | 0.1V | ±(0.5%+10) |
AC Voltage (ACV)
| Range | Frequency Range | Resolution | Accuracy |
|---|---|---|---|
| 300.00mV | 40Hz ~ 400Hz | 0.01mV | ±(1.0%+25) |
| >400Hz ~ 10kHz | ±(2.5%+60) | ||
| 3.0000V | 40Hz ~ 400Hz | 0.0001V | ±(0.8%+25) |
| >400Hz ~ 10kHz | ±(3.0%+50) | ||
| 30.000V | 40Hz ~ 400Hz | 0.001V | ±(0.8%+25) |
| >400Hz ~ 10kHz | ±(3.0%+50) | ||
| 300.00V | 40Hz ~ 400Hz | 0.01V | ±(0.8%+25) |
| >400Hz ~ 5kHz | ±(2.0%+25) | ||
| 750.0V | 40Hz ~ 200Hz | 0.1V | ±(1.0%+25) |
| >200Hz ~ 1kHz | ±(5.0%+50) |
DC Current (DCA)
| Range | Resolution | Accuracy |
|---|---|---|
| 300.00uA | 0.01uA | ±(0.15%+20) |
| 3.0000mA | 0.0001mA | ±(0.15%+20) |
| 30.000mA | 0.001mA | ±(0.15%+20) |
| 300.00mA | 0.01mA | ±(1.2%+50) |
| 3.0000A | 0.0001A | ±(1.2%+50) |
| 10.000A | 0.001A | ±(1.2%+50) |
AC Current (ACA)
| Range | Frequency Range | Resolution | Accuracy |
|---|---|---|---|
| 300.00uA | 40Hz ~ 400Hz | 0.01uA | ±(0.8%+30) |
| >400Hz ~ 10kHz | ±(3.0%+50) | ||
| 3.0000mA | 40Hz ~ 400Hz | 0.0001mA | ±(0.8%+30) |
| >400Hz ~ 10kHz | ±(3.0%+50) | ||
| 30.000mA | 40Hz ~ 400Hz | 0.001mA | ±(1.2%+30) |
| >400Hz ~ 10kHz | ±(3.0%+50) | ||
| 300.00mA | 40Hz ~ 400Hz | 0.01mA | ±(1.2%+30) |
| >400Hz ~ 1.5kHz | ±(3.0%+50) | ||
| 3.0000A | 40Hz ~ 400Hz | 0.0001A | ±(1.5%+30) |
| >200Hz ~ 1kHz | ±(2.5%+25) | ||
| 10.000A | 40Hz ~ 400Hz | 0.001A | ±(1.5%+20) |
| >200Hz ~ 1kHz | ±(2.5%+25) |
Resistance
| Range | Resolution | Accuracy |
|---|---|---|
| 300.00Ω | 0.01Ω | ±(0.5%+10) |
| 3.0000kΩ | 0.0001kΩ | ±(0.5%+10) |
| 30.000kΩ | 0.001kΩ | ±(0.5%+10) |
| 300.00kΩ | 0.01kΩ | ±(0.5%+10) |
| 3.0000MΩ | 0.0001MΩ | ±(0.8%+25) |
| 30.000MΩ | 0.001MΩ | ±(1.5%+50) |
| 300.0MΩ | 0.1MΩ | ±(5.0%+50) |
Capacitor
| Range | Resolution | Accuracy |
|---|---|---|
| 30.000nF | 0.001nF | ±(5.0%+50) |
| 300.00nF | 0.01nF | ±(5.0%+50) |
| 3.0uF | 0.1nF | ±(4.0%+50) |
| 30.000uF | 0.001uF | ±(4.0%+50) |
| 300.00uF | 0.01uF | ±(4.0%+50) |
| 3.0mF | 0.001mF | ±(10%+50) |
| 30.000mF | 0.001mF | ±(20%+50) |
Note: Measurement speed for capacitors below 30mF, maximum 6s.
Frequency
| Range | Resolution | Accuracy |
|---|---|---|
| 10Hz ~ 300MHz | 0.01Hz ~ 0.01MHz | ±(0.1%+5) |
Temperature
| Range | Resolution | Accuracy |
|---|---|---|
| (-40~1000)℃ | 0.1℃ | ±(1.5%+3℃) |
8. User Tips
- Leverage Dual Display: For complex circuit analysis, utilize the dual display function to monitor two parameters simultaneously, such as voltage and frequency, to gain a more complete understanding of circuit behavior.
- Data Logging: Use the recorder function for long-term monitoring or to capture intermittent events. The adjustable time step allows for flexible data collection.
- PC Connectivity: For advanced analysis, data export, or remote control, connect the multimeter to your computer via the USB interface. Refer to the software manual (if applicable) for detailed instructions on using the PC interface.
- Safety First: Always ensure the correct function and range are selected before making any measurements. Pay attention to the input terminals and maximum ratings to prevent damage to the device or personal injury.
9. Warranty and Support
RuoShui provides the following warranty and support for the 8045mini Desktop Digital Multimeter:
- Product Warranty: A 1-year warranty is provided for the multimeter, excluding items damaged and/or misused after receipt.
- Accessories Warranty: Accessories included with the product come with a 3-month warranty.
- Defective Items: Defective items must be reported and returned within the warranty period and in the original packaging, if possible.
- Customer Support: If you encounter any problems with your product or require technical assistance, please contact RuoShui customer service. We are committed to providing the best possible solution.