Introduction
The Atago AES-421 Digital Salt-Meter ES-421 is a precision instrument designed for accurately measuring the level of salinity in various solutions. Utilizing a conductivity method, this device provides reliable salt concentration readings for a wide range of soluble materials, including dilute solutions of soy sauce, ketchup, mayonnaise, Worcester sauce, and squeezed juices from pickles. Its funnel-shaped sensor section ensures efficient sample application and measurement.
Figure 1: The Atago AES-421 Digital Salt-Meter ES-421. The device is white with a black and grey control panel. The digital display shows a temperature of 20.3°C and a salt percentage reading of 1.95%. Below the display are two buttons: 'START/OFF' and 'ZERO'. The sensor section is visible on the right side of the device.
Setup
Before initial use, ensure the device is properly prepared.
- Unpacking: Carefully remove the AES-421 Salt-Meter from its packaging. Inspect for any visible damage.
- Battery Installation: Locate the battery compartment, usually on the back or bottom of the unit. Insert the required batteries (e.g., AAA or AA, refer to specific product labeling if available) ensuring correct polarity. Close the compartment securely.
- Initial Power On: Press the START/OFF button to power on the device. The display should illuminate.
- Zero Calibration: For accurate measurements, perform a zero calibration.
- Ensure the sensor section is clean and dry.
- Apply a small amount of distilled water to the funnel-shaped sensor section.
- Press the ZERO button. The display should show 0.00% or a similar indication of zero.
- Rinse the sensor with distilled water and dry thoroughly after calibration.
Operating Instructions
Follow these steps to obtain accurate salt concentration readings:
- Prepare the Sample: Ensure the sample to be measured is homogeneous and free of large particles. For highly concentrated samples, dilution may be necessary to fall within the measurement range of 0.0 to 10.0% salt concentration.
- Clean the Sensor: Before each measurement, clean the funnel-shaped sensor section with distilled water and dry it thoroughly with a soft, lint-free cloth.
- Apply Sample: Place a small amount of the prepared sample into the funnel-shaped sensor section. Ensure the sample completely covers the sensor electrodes.
- Take Reading: The device will automatically display the salt concentration percentage (Salt %) and temperature (°C) on the digital screen. Allow a few seconds for the reading to stabilize.
- Record Data: Note down the displayed salt concentration and temperature.
- Rinse Sensor: Immediately after each measurement, rinse the sensor section thoroughly with distilled water to prevent residue buildup. Dry the sensor completely before the next measurement or storage.
- Power Off: Press the START/OFF button to turn off the device when not in use to conserve battery life.
Important Considerations:
- The measurement range is 0.0 to 10.0% salt concentration.
- Temperature compensation is typically automatic, but extreme temperature variations in samples can affect accuracy.
- Always ensure the sensor is clean and dry before and after use.
Maintenance
Proper maintenance ensures the longevity and accuracy of your Atago AES-421 Salt-Meter.
- Cleaning the Sensor: After each use, rinse the funnel-shaped sensor section with distilled or deionized water. Use a soft, lint-free cloth or tissue to gently wipe and dry the sensor. Avoid abrasive materials or harsh chemicals that could damage the sensor electrodes.
- Cleaning the Body: Wipe the main body of the device with a soft, damp cloth. Do not immerse the device in water or use organic solvents.
- Storage: Store the salt meter in a cool, dry place, away from direct sunlight and extreme temperatures. Ensure the sensor is clean and dry before storage.
- Battery Replacement: If the battery indicator on the display shows low power, replace the batteries promptly to ensure continuous operation and prevent data loss or inaccurate readings.
- Regular Calibration: Perform zero calibration regularly, especially if you suspect inaccurate readings or after prolonged storage.
Troubleshooting
Refer to the following table for common issues and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Dead or incorrectly installed batteries. | Replace batteries with new ones, ensuring correct polarity. |
| Inaccurate or unstable readings. |
|
|
| Display shows "Err" or error code. | Measurement outside range, sensor issue, or internal malfunction. |
|
Specifications
Key technical specifications for the Atago AES-421 Digital Salt-Meter ES-421:
- Measurement Method: Conductivity method
- Measurement Range: 0.0 to 10.0% (100g) of salt concentration
- Accuracy (0.00 to 1.00%): Displayed value ± 0.05%
- Relative Precision (1.00 to 10.0%): ± less than 5%
- Item Model Number: AES-421
- Item Weight: 1 ounces
- Manufacturer: Atago
Warranty and Support
For information regarding product warranty, service, or technical support, please contact Atago directly or refer to their official website.
Manufacturer: Atago
Website: www.atago.net (Note: This is a general link to Atago's global site, specific regional support may vary.)
