VTSYIQI VD-99P Smart Food Water Activity Meter

1. Introduction

This manual provides detailed instructions for the operation and maintenance of the VTSYIQI VD-99P Smart Food Water Activity Meter. This instrument is designed for precise measurement of water activity in various food products such as paste, jam, jello, and dough. It features real-time printing and data recording capabilities, ensuring accurate and efficient quality control.

2. Product Features

• Measuring range: Temperature, -10℃～50℃; Water activity, 0～1.000aw
• Resolution: Water activity: 0.001aw; Temperature: 0.1 C
• Measurement accuracy: Temperature ±0.5℃; Water activity ±0.012 (@23℃±5℃)
• Display mode: Large-screen LCD 128×64DOTS
• Repeatability: ≤0.008aw
• Data Storage: Can circularly record 5,000 sets of measured data
• Measurement time: 5～40min; automatic measurement
• Connectivity: RS232 interface or USB interface for computer connection
• Printing Function: Print at the end of measurement or real-time print
• Work environment: Temperature -10℃～50℃; Relative humidity 0～95%RH

Image: VTSYIQI VD-99P Smart Water Activity Meter displaying its key features and specifications.

3. Package Contents

Upon unpacking, please verify that all items listed below are present and in good condition:

• VTSYIQI VD-99P Smart Water Activity Meter Main Unit
• WSC-4 Water Activity Sensor (1 unit)
• Mini Printer (TPμP-T Series)
• Power Cable
• RS232 Interface Cable
• USB Interface Cable
• Sample Dishes (multiple plastic cups)
• Printer Paper Roll
• Calibration Solutions (AR MgCl2, AR NaCl)
• User Manuals (for meter and printer)
• Carrying Case

Image: A complete view of the VTSYIQI VD-99P Smart Water Activity Meter, including the main unit, sensor, printer, cables, calibration solutions, sample dishes, and carrying case.

4. Setup

1. Unpacking: Carefully remove all components from the carrying case.
2. Power Connection: Connect the power cable to the 'Power Socket' on the rear panel of the main unit and plug it into a compatible power outlet (100-230VAC ±10% 50Hz/60Hz).
3. Sensor Connection: Connect the WSC-4 Water Activity Sensor cable to one of the 'Sensor Socket' ports (No.1, No.2, No.3, or No.4) on the rear panel. Ensure a secure connection.
4. Printer Connection: Connect the mini printer to the 'Printer Power Outlet' and the 'Communication Port' on the rear panel of the main unit using the provided cables.
5. Initial Power-On: Flip the 'Power Switch' to the ON position. The device will perform a self-check and display the main menu.

Image: The rear panel of the VD-99P meter, highlighting the sensor sockets, communication ports, printer power outlet, and power switch.

5. Operating Instructions

5.1. Basic Navigation

Use the 'SELECT' button to cycle through menu options and the 'CONFIRM' button to enter a selected option. The '+' and '-' buttons are used for adjusting values or navigating within sub-menus.

5.2. Measurement

1. From the main menu, select "1. Measurement" and press 'CONFIRM'.
2. Prepare your sample (e.g., dough, paste) in a clean sample dish.
3. Place the WSC-4 sensor directly onto the sample, ensuring good contact.
4. The meter will begin measuring water activity (AW) and temperature (Temp). The measurement time will be displayed.
5. Once the measurement is complete (typically 5-40 minutes), the results will be displayed on the LCD screen.
6. If the printer is connected and enabled, the results will automatically print.

Image: The VTSYIQI VD-99P Smart Water Activity Meter connected to multiple WSC-4 sensors, actively measuring water activity in dough samples.

5.3. Calibration

Regular calibration ensures the accuracy of your water activity meter. The VD-99P supports one-point and two-point calibration using standard solutions.

1. From the main menu, select "2. Calibration" and press 'CONFIRM'.
2. Choose between "1. One-Point" or "2. Two-Point" calibration.
3. For one-point calibration, select the desired standard solution (e.g., NaCl). For two-point, select two different standard solutions (e.g., NaCl and MgCl2).
4. Place the WSC-4 sensor onto the respective calibration solution in a sample dish.
5. Follow the on-screen prompts to complete the calibration process. The meter will display the current AW and temperature readings during calibration.

Image: Petri dishes containing calibration solutions (NaCl and MgCl2) used for accurate water activity measurement.

5.4. Settings

The settings menu allows you to configure various parameters of the meter.

1. From the main menu, select "3. Setting" and press 'CONFIRM'.
2. You can adjust the measurement time (M Time) using the '+' and '-' buttons.
3. Toggle "Automatic measurement" ON or OFF.
4. Press 'CONFIRM' to save changes and exit the settings menu.

5.5. Query

The query function allows you to review previously recorded measurement data.

1. From the main menu, select "4. Query" and press 'CONFIRM'.
2. Use the '+' and '-' buttons to navigate through the stored data sets.
3. Press 'SELECT' to view details of a specific record.

6. Maintenance

• Cleaning: Regularly clean the exterior of the main unit and sensors with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
• Sensor Care: Keep the WSC-4 sensors clean and free from sample residue. Store them in a dry, dust-free environment when not in use.
• Calibration Solutions: Store calibration solutions according to their instructions to maintain their integrity and accuracy. Replace expired solutions.
• Storage: When not in use for extended periods, store the meter and all accessories in the provided carrying case in a cool, dry place.

7. Troubleshooting

8. Specifications

9. Warranty and Support

VTSYIQI provides a standard quality assurance for one year from the date of purchase. In addition, if you encounter any quality issues with the meter within the first three months, a replacement will be provided. The printer's warranty period is also one year.

The warranty does not cover:

• Damage to visible components of the sensor.
• Damage caused by pulling out the plug incorrectly or inserting the wrong plug type.
• Damage due to improper operation, unauthorized disassembly, or human factors.

This warranty card must be owned and fully preserved by the user for warranty claims. The card service is not accepted without it.

For technical support or service inquiries, please contact your vendor or refer to the contact information provided in the product packaging.