1. Product Overview
The Atago PAL-1 is a compact, handheld digital refractometer designed for quick and accurate measurement of Brix (sugar concentration) in various solutions. It is commonly used in culinary, food and beverage, pharmaceutical, and other industrial applications. Its robust design and IP-65 rating ensure durability and ease of cleaning.
Image 1.1: Atago PAL-1 Refractometer. This image displays the Atago PAL-1 digital refractometer. The device is white with a blue and white label on the front. It features a digital LCD screen showing a Brix reading of "13.5" and a temperature of "20.3°C", along with a battery indicator. Below the screen are two circular buttons: a "START" button and a "ZERO" button. At the top, there is a metallic sample stage where liquid samples are placed for measurement. The text "Pocket REFRACTOMETER PAL-1" is visible at the bottom of the label.
2. Key Features
- Simple Operation: Apply sample, press start, and reading is displayed in seconds.
- Extended Range: Measures Brix in the 0.0 to 53.0% range.
- Rugged Design: IP65-rated for dust and water jet protection, making it easy to clean.
- Easy Calibration: Calibrate with water by cleaning the prism, adding water, and pressing the zero key.
- Automatic Temperature Compensation (ATC): Provides accurate readings regardless of ambient temperature.
- External Light Interference (ELI) Warning: Alerts the user if direct light is affecting the measurement.
- Compact and Lightweight: Designed for portability and one-handed operation.
3. What's in the Box?
Upon opening the package, please verify that all the following items are included:
- Atago 3810 PAL-1 Refractometer
- (2) AAA Alkaline Batteries
- Plastic Storage Case
- Instruction Manual (this document)
4. Setup
4.1. Battery Installation
- Locate the battery compartment cover on the back of the unit.
- Slide or unclip the cover to open the compartment.
- Insert two (2) AAA alkaline batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Replace the battery compartment cover securely.
4.2. Initial Calibration (Zero Setting)
For accurate measurements, the PAL-1 must be calibrated with water before first use and periodically thereafter.
- Ensure the prism surface is clean and dry. Use a soft, lint-free cloth.
- Place a few drops of distilled or deionized water onto the prism surface. Ensure the water covers the entire surface.
- Press the ZERO button. The display will show "0.0%" Brix.
- Wipe the water off the prism surface with a clean, soft cloth. The device is now calibrated and ready for use.
Note: Calibration should be performed at room temperature. The device features Automatic Temperature Compensation (ATC) for sample measurements.
5. Operating Instructions
5.1. Taking a Measurement
- Ensure the prism surface is clean and dry.
- Place a few drops (approximately 0.3 mL) of the sample liquid onto the prism surface. Ensure the sample covers the entire surface.
- Close the daylight plate (if applicable, though not explicitly mentioned for PAL-1, it's standard for refractometers).
- Press the START button.
- The Brix value and temperature will be displayed on the LCD screen within 3 seconds.
- After measurement, immediately clean the prism surface with water and a soft cloth to prevent sample residue from drying.
5.2. Understanding the Display
The LCD screen provides the following information:
- Brix Value: The main large number indicates the sugar concentration in percent by weight (%).
- Temperature: Displays the sample temperature in degrees Celsius (°C).
- Battery Indicator: Shows the remaining battery life.
- Measurement Range: Indicates the operational Brix range (0.0 to 53.0%).
5.3. Automatic Temperature Compensation (ATC)
The PAL-1 is equipped with ATC, which automatically adjusts the Brix reading to a standard reference temperature (typically 20°C) to ensure accuracy, even if the sample temperature varies between 10°C and 100°C.
5.4. External Light Interference (ELI) Warning
If the device detects strong external light interfering with the measurement, an ELI warning message will appear on the display. To resolve this, move the refractometer to a location with less direct light or shield the prism from strong light sources.
6. Maintenance
6.1. Cleaning the Prism
Always clean the prism immediately after each use to prevent sample residue from drying and affecting future measurements. Use a soft, lint-free cloth or tissue moistened with water. Do not use abrasive materials or harsh chemicals.
6.2. Washing the Unit
The PAL-1 has an IP65 rating, meaning it is protected against dust ingress and low-pressure water jets. It can be washed under running water. Ensure the battery compartment cover is securely closed before washing. Do not immerse the unit in water.
6.3. Battery Replacement
When the battery indicator shows low power, replace both AAA batteries as described in Section 4.1. Remove batteries if the unit will not be used for an extended period to prevent leakage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display / Unit does not turn on | Dead or incorrectly installed batteries. | Check battery polarity. Replace with new AAA batteries. |
| Inaccurate readings | Dirty prism; improper calibration; sample not covering prism; ELI warning. | Clean prism thoroughly. Recalibrate with distilled water. Ensure sample covers entire prism. Move away from strong light sources. |
| "ELI" warning displayed | External light interference. | Move to a darker location or shield the prism from direct light. |
| Display shows "---" or "HHH" | Measurement out of range or error. | Ensure sample is within 0.0-53.0% Brix range. Re-apply sample. If problem persists, contact support. |
8. Specifications
| Parameter | Value |
|---|---|
| Measurement Scale Range (Brix) | 0.0 to 53.0% |
| Measurement Scale Range (Temperature) | 9.0 to 99.9 °C |
| Measurement Resolution (Brix) | 0.1% |
| Measurement Resolution (Temperature) | 0.1 °C |
| Measurement Accuracy (Brix) | ± 0.2% |
| Measurement Accuracy (Temperature) | ± 1 °C |
| Sample Measurement Temperature (ATC) | 10 to 100 °C |
| Ambient Temperature | 10 to 40 °C |
| Sample Volume | 0.3 mL |
| Measurement Time | 3 seconds |
| Ingress Protection (IP) Rating | IP-65 |
| Display | Digital LCD |
| Power Supply | (2) AAA Alkaline Batteries |
| Dimensions (H x W x D) | 10.9 x 5.5 x 3.1 cm (4.3 x 2.2 x 1.2 inches) |
| Weight | 100g (3.5 oz) |
| Country of Origin | Japan |
9. Warranty Information
The Atago PAL-1 Digital Hand Held Pocket Refractometer comes with a 1-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper maintenance. Please retain your proof of purchase for warranty claims.
10. Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Atago customer support. Refer to the official Atago website or the packaging for the most current contact information.
You may also visit the Atago Official Website for product information and support resources.
