Introduction
The Atago 3405 PR-32α Palette is a portable digital refractometer designed for precise measurement of low Brix concentrations (0.0 to 32.0%) in various liquid samples. This device is ideal for applications in food and beverage, chemical, and industrial sectors, providing accurate results with automatic temperature compensation (ATC) and external light interference (ELI) technology.
This manual provides essential information for the proper setup, operation, maintenance, and troubleshooting of your Atago PR-32α refractometer to ensure optimal performance and longevity.
What's in the Box?
- 3405 PR-32α refractometer
- 9V battery
- Carrying case
- Instructions (this manual)
Image: The Atago 3405 PR-32α digital refractometer is shown alongside its black carrying case. The refractometer is black with a yellow display area and gray buttons. The carrying case is a rectangular black box with "Palette DIGITAL REFRACTOMETER" and "ATAGO www.atago.net" printed on its lid.
Setup
1. Battery Installation
- Locate the battery compartment on the back of the refractometer.
- Open the battery compartment cover.
- Insert the included 9V battery, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
2. Initial Calibration (Zero Setting)
For accurate measurements, the refractometer must be calibrated with distilled water before first use and periodically thereafter.
- Ensure the refractometer is clean and dry.
- Place a few drops of distilled water onto the sample well (prism surface). Ensure the prism surface is completely covered.
- Press the START/OFF button to turn on the device.
- Press the ZERO button (refer to device buttons for exact labeling if different from generic). The display should show "0.0%" or similar, indicating successful calibration.
- Wipe the distilled water from the sample well using a soft, lint-free cloth.
Note: Calibration should be performed at an ambient temperature between 5 to 40 degrees C.
Operating Instructions
1. Taking a Measurement
- Ensure the sample well is clean and dry.
- Place one to two drops of the liquid sample onto the sample well (prism surface). Ensure the prism is fully covered without air bubbles.
- Close the daylight plate (if applicable) gently over the sample.
- Press the START/OFF button to initiate the measurement.
- The % Brix reading will be displayed on the LED screen within approximately three seconds. The device automatically compensates for temperature variations within its operating range (5 to 40 degrees C).
- Record the measurement if necessary.
- After measurement, clean the sample well thoroughly with distilled water and a soft cloth.
2. Using the User-Scale Function
The PR-32α features a user-scale function, allowing you to input a coefficient to convert the Brix reading into a specific concentration unit relevant to your sample (e.g., concentration = Brix X coefficient).
- Refer to the detailed instructions in the full user manual (if provided separately) or Atago's official website for specific steps on programming and utilizing the user-scale function.
- This function is particularly useful for specific industrial or chemical applications where a direct Brix reading needs conversion to a custom unit.
3. External Light Interference (ELI) Technology
The refractometer incorporates ELI technology, which minimizes interference from strong external light sources (e.g., direct sunlight, bright windows). This ensures accurate measurements even when operating outdoors or near bright light sources.
Maintenance
1. Cleaning the Sample Well
- Always clean the sample well (stainless steel 316 prism surface) immediately after each use.
- Use distilled water and a soft, lint-free cloth or tissue to gently wipe away any sample residue.
- Do not use abrasive materials or harsh chemicals, as they can damage the prism surface.
- Ensure the sample well is completely dry before storing the device or taking a new measurement.
2. General Care and Storage
- The device has an Ingress Protection (IP)-65 rating, offering protection against dust and splashing water. However, avoid submerging the unit in water or exposing it to excessive moisture.
- Store the refractometer in its carrying case when not in use to protect it from dust, dirt, and physical damage.
- Store in a cool, dry place, away from direct sunlight and extreme temperatures.
- If the device will not be used for an extended period, remove the 9V battery to prevent leakage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Battery is dead or incorrectly installed. | Check battery polarity. Replace with a new 9V battery. |
| Inaccurate readings. |
|
|
| Display shows error message. | Specific error condition (e.g., low battery, sensor issue). | Refer to the full user manual for specific error codes. Try replacing battery or re-calibrating. If problem persists, contact Atago support. |
Specifications
| Feature | Detail |
|---|---|
| Measurement Scale Range | 0.0 to 32.0% Brix |
| Minimum Detection Scale | 0.1% Brix |
| Accuracy | ± 0.1% Brix |
| Sample Measurement Temperature Range | 5 to 40 degrees C (ATC) |
| Ambient Temperature | 5 to 40 degrees C |
| Light Source and Display Type | LED digital, % Brix, or degrees C |
| Power Source | 9V battery (included) |
| Standards Met | Ingress Protection (IP)-65; ISO 9001 |
| Dimensions (H x W x D) | 4 x 17 × 9cm |
| Weight | 300g |
| Model Number | ATA-3405 |
Warranty and Support
Atago Co., Ltd. products are manufactured to high quality standards. For specific warranty information regarding your PR-32α refractometer, please refer to the warranty card included with your product or visit the official Atago website.
For technical support, service, or inquiries, please contact Atago customer service or visit their official website:
