REVASRI BM-04s
REVASRI Digital Brix Refractometer BM-04s User Manual
Model: BM-04s
1. Product Overview
The REVASRI Digital Brix Refractometer is a precision instrument designed for measuring the sugar content in various liquids. It features a wide measurement range of 0-55% Brix with high accuracy (±0.2%) and resolution (0.1%). Equipped with automatic temperature compensation (10°C to 40°C) and a high light-transmission prism, it ensures consistent and reliable readings. The device includes a high-definition LCD for clear, fast readings and is powered by a built-in 750mAh lithium battery, offering extended use on a single charge. Its waterproof sample tank allows for easy cleaning, making it an ideal tool for brewers, winemakers, food and beverage producers, and fruit growers.
Figure 1: REVASRI Digital Brix Refractometer
2. Parts Identification
Figure 2: Key components of the refractometer
- Protection Cover: Protects the prism and sample tank. Must be closed during measurement.
- Display: High-definition LCD screen showing Brix value, temperature, and battery status.
- Power Button: Used to turn the device on and off.
- Measure Button: Initiates the measurement process.
- Zero Calibration Button: Used for calibrating the device to 0.0% Brix with distilled water.
- Measurement Slot: Area where the liquid sample is placed for testing.
- Type-C Charging Port: For recharging the built-in lithium battery.
3. Setup
3.1 Initial Charge
Before first use, ensure the refractometer is fully charged using the provided USB Type-C cable. The built-in 750mAh lithium battery provides approximately one month of use on a full charge.
3.2 Zero Calibration
Perform zero calibration before the first use and periodically to ensure accuracy. Use distilled water for calibration.
- Long press the power button to turn on the device.
- Clean the measurement slot thoroughly.
- Drop distilled water into at least 1/2 of the sample tank.
- Close the protection cover.
- Press the 'Zero' button. The display should show "Measurement 0.0%" when calibration is complete.
Figure 3: Steps 1 & 2 of operation
Figure 4: Steps 3 & 4 of operation
4. Operating Instructions
4.1 Taking a Measurement
- Ensure the device is calibrated (see Section 3.2).
- Clean the sample tank thoroughly with a soft cloth.
- Using a dropper, place a few drops of the liquid sample into the measurement slot, filling it at least two-thirds full.
- Close the protection cover gently.
- Press the 'Measure' button. The Brix value will be displayed on the LCD screen within seconds.
4.2 Measurement Precautions
- Avoid direct extrusion of fruit onto the prism; always use a prepared liquid sample.
- Do not measure samples with temperatures below 10°C or above 40°C, as this may affect accuracy.
- Always ensure the previous liquid sample is completely wiped clean from the prism before a new measurement.
- For best results, mix the liquid sample thoroughly before testing.
Figure 5: Important measurement precautions
4.3 Video Demonstration
Video 1: This video demonstrates the features and basic operation of the REVASRI Digital Brix Refractometer, including its display, buttons, and measurement process.
5. Maintenance
5.1 Cleaning
The sample tank part of the refractometer is waterproof (IP65 rated) and can be washed under running water after use. Immediately dry the sample tank after cleaning. It is crucial to keep the charging port away from water to prevent damage.
Figure 6: Cleaning the waterproof sample tank
5.2 Storage
Store the refractometer in a clean, dry place away from direct sunlight and extreme temperatures. Ensure the sample tank is clean and dry before storage.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Inaccurate readings | Improper calibration; dirty prism; sample temperature outside range; insufficient sample volume. | Perform zero calibration with distilled water; clean prism thoroughly; ensure sample temperature is between 10°C and 40°C; ensure sample tank is at least 1/2 full. |
| Device does not turn on | Low battery. | Charge the device using the USB Type-C cable. |
| Display shows "ERR3: sample quantity not enough" or "ERR2: sample over range" | Insufficient sample volume or sample Brix value exceeds 55%. | Ensure sample tank is at least 1/2 full. Note that this model measures up to 55% Brix; for higher concentrations, a different refractometer may be needed. |
7. Specifications
- Model: BM-04s
- Measurement Range: 0-55% Brix
- Accuracy: ±0.2%
- Resolution: 0.1%
- Automatic Temperature Compensation (ATC): 10°C to 40°C
- Battery: 750mAh Built-in Lithium Ion (rechargeable via USB Type-C)
- Dimensions: 13.21 x 5.08 x 3.05 cm (5.2 x 2 x 1.2 inches)
- Weight: 118 g
- Color: White, Blue
- Waterproof Rating: IP65 (sample tank only)
8. Warranty and Support
The REVASRI Digital Brix Refractometer comes with a 1-year warranty. Lifetime technical support is available for any issues or questions you may have. Please contact REVASRI customer service for assistance.