RCYAGO PH-W218 8-in-1 WiFi Tuya Water Quality Tester Instruction Manual

1. Introduction

The RCYAGO PH-W218 is an advanced 8-in-1 WiFi online water quality tester designed for comprehensive monitoring of various water parameters. This device allows for real-time data detection and transfer to your smartphone via the Tuya Smart APP, making it ideal for applications such as aquariums, mariculture, drinking water analysis, soilless cultivation, hydroponics, and swimming pools. It measures pH, ORP, EC, TDS, SALT, S.G., TEMP, and CF, providing accurate and reliable data for effective water management.

Figure 1: RCYAGO PH-W218 8-in-1 WiFi Tuya Water Quality Tester

2. Key Features

• APP Real-Time Monitoring: Connects via WiFi to the Tuya Smart APP for real-time data monitoring on your smartphone.
• Data Logging Function: Records data over time and provides graphs for comparative analysis. Supports exporting data to email for daily, weekly, and monthly review.
• Functional Partition Design: Features three backlit screens displaying key data simultaneously, with one-key switching for different functions.
• Wall-Mounted Design: Easy installation with included clips and suction cups, suitable for walls or fish tanks.
• Dedicated Probes: Utilizes specialized probes for PH, ORP, TDS/EC/Salt/S.G./CF, and Temperature for enhanced accuracy and reduced errors.
• Easy Operation: Simple immersion of electrodes provides quick data readings on the LCD screen.
• Wide Application Range: Suitable for diverse environments including fish tanks, mariculture, drinking water, soilless culture, aquariums, hydroponics, laboratories, spas, and swimming pools.

Figure 2: Diverse applications of the PH-W218 tester

3. Package Contents

Please check the package carefully to ensure all items are present and undamaged:

• 1 x Multifunctional Monitor (Main Unit)
• 1 x PH Probe
• 1 x ORP Probe
• 1 x TDS/EC/Salt/S.G./CF Probe
• 1 x Temperature Probe
• 1 x Power Adapter (EU/US/UK/AU Plug, depending on region)
• 1 x Clip
• 2 x Suction Cups
• 1 x User Manual

Figure 3: Package contents

4. Specifications

Other Specifications:

• Operating Temperature: 0°C - 50°C
• Temperature Compensation: 0°C - 50°C
• Power Supply: DC6V
• Product Dimensions: 152 mm x 80 mm x 26 mm (approx. 5.98 in x 3.15 in x 1.02 in)
• Product Weight: 245g
• Certifications: CE, RoHS

Figure 4: TDS Value Interpretation

Figure 5: EC (Electrical Conductivity) Values

Figure 6: ORP Value Interpretation

Figure 7: Product Dimensions

5. Setup

1. Unpack: Carefully remove all components from the packaging.
2. Connect Probes: Connect the PH, ORP, TDS/EC/Salt/S.G./CF, and Temperature probes to their respective ports on the main unit. Ensure connections are secure.
3. Power On: Connect the DC6V power adapter to the main unit and plug it into a power outlet. The device will power on and display readings.
4. Mounting (Optional): Use the provided clip and suction cups to mount the main unit to a wall or the side of an aquarium. Ensure the unit is placed in a stable position and away from direct water splashes.
5. Initial Immersion: Immerse the probes into the water you wish to test. Ensure the probe tips are fully submerged but the main unit remains dry.

Figure 8: Probe and Power Adapter Connections

Figure 9: Wall-mounted installation example

5.1 WiFi Connection and App Setup

1. Download Tuya Smart App: Download and install the 'Tuya Smart' app from your smartphone's app store (available for Apple and Android systems).
2. Register/Login: Open the app and register for a new account or log in with an existing one.
3. Enter Pairing Mode: On the PH-W218 main unit, long press the 'MODE' button (located under the PPM/EC/SALT/S.G./CF display) until the WiFi indicator on the display starts blinking, indicating it's in pairing mode.
4. Add Device in App: In the Tuya Smart app, tap 'Add Device' or the '+' icon. The app should automatically discover the device. If not, select 'Add Manually' and search for 'Water Quality Tester' or similar.
5. Connect to WiFi: Follow the on-screen prompts to enter your WiFi network name and password. Ensure your phone and the device are connected to a 2.4GHz WiFi network.
6. Completion: Once connected, the device will appear in your app, and you can view real-time data and settings.

Video 1: Demonstration of WiFi connection and app setup

6. Operation

6.1 Reading Measurements

Once the probes are immersed in the water and the device is powered on, the three backlit screens will display the current readings for PH/TEMP, ORP, and PPM/EC/SALT/S.G./CF. The specific parameter displayed on the third screen can be cycled through.

Figure 10: Main Unit Interface and Controls

6.2 Switching Measurement Modes

• PPM/EC/SALT/S.G./CF: Short press the 'MODE' button (under the third display) to cycle through PPM, EC, SALT, S.G., and CF measurements.
• Temperature Unit: Short press the 'TEMP CAL' button (under the PH/TEMP display) to switch between Celsius (°C) and Fahrenheit (°F).

Figure 11: Switching PPM/EC/SALT/S.G./CF Modes

Figure 12: Switching Temperature Units

6.3 WiFi Control and Data Transfer

• WiFi On/Off: Long press the 'MODE' button to toggle WiFi connectivity on or off.
• App Monitoring: Once connected to the Tuya Smart app, you can view all parameters, set alarms (e.g., pH high/low alarm), and review historical data (weeks, days, month, hour).
• Data Export: The app allows you to export measurement data to your email in a form (e.g., Excel). Click 'Export' in the app, enter your email, and then download the file from your inbox.

Figure 13: Mobile Application Monitoring Interface

Figure 14: Data Logging Capabilities

Figure 15: Data Export Process

Figure 16: Controlling Multiple Devices

7. Calibration

Regular calibration is essential for maintaining the accuracy of your water quality tester. The PH-W218 features dedicated calibration buttons for PH, ORP, and PPM/EC/SALT/S.G./CF.

1. Prepare Calibration Solutions: Obtain appropriate calibration buffer solutions for the parameters you wish to calibrate (e.g., pH 4.00, 6.86, 9.18 for pH; specific EC/TDS solutions). These solutions are typically not included and must be purchased separately.
2. PH Calibration: Long press the 'TEMP CAL' button (under the PH/TEMP display) to enter PH calibration mode. Follow the on-screen instructions or refer to the detailed user manual for the specific calibration steps using your pH buffer solutions.
3. ORP Calibration: Press the 'CAL' button under the ORP display to initiate ORP calibration. Use a known ORP standard solution as per the detailed user manual.
4. PPM/EC/SALT/S.G./CF Calibration: Press the 'CAL' button under the PPM/EC/SALT/S.G./CF display to initiate calibration for these parameters. Use appropriate standard solutions for EC/TDS/SALT as per the detailed user manual.
5. Rinse Probes: Always rinse the probes with distilled water before and after calibration to prevent contamination.

Note: Calibration solutions are crucial for accurate readings and are typically not included with the device. Please acquire them separately if needed.

8. Maintenance

• Keep Dry: The main unit is NOT waterproof. Do not expose the tester to water or damp conditions. Water ingress can cause malfunction.
• Clean Probes: Regularly clean the probes with distilled water to remove any residue or buildup that could affect accuracy. For stubborn deposits, use a soft brush or a mild cleaning solution specifically designed for probes, then rinse thoroughly.
• Store Probes Properly: When not in use, ensure pH and ORP probes are stored in their protective caps with a small amount of storage solution (or pH 4 buffer if storage solution is unavailable) to prevent them from drying out. Other probes can be stored dry.
• Check Connections: Periodically check all probe connections and the power adapter for any signs of wear or damage.
• Software Updates: Keep the Tuya Smart app updated to the latest version for optimal performance and new features.

9. Troubleshooting

Q: Device not connecting to WiFi / App not finding device.

A: Ensure the device is in pairing mode (WiFi indicator blinking after long pressing 'MODE' button). Check that your smartphone and the tester are both connected to a 2.4GHz WiFi network. Verify your WiFi password. Try restarting both the tester and your router.

Q: Readings are inaccurate or fluctuating.

A: This often indicates that the probes need cleaning or calibration. Refer to the 'Maintenance' and 'Calibration' sections. Ensure probes are fully submerged and there are no air bubbles around them. Check for any damage to the probe tips.

Q: Cannot export data to email.

A: Ensure your device has a stable internet connection. Check your email's spam/junk folder. Verify that the email address entered in the app is correct. Note that there might be limits on the number of data exports per day/week/month (e.g., 55 sets of data within 24 hours, 30 sets of Days, Weeks or Month, and 25 sets of Hour).

Q: Device displays '0000' or '---' for a parameter.

A: This could mean the probe for that parameter is not connected correctly, is faulty, or the measurement is out of range. Check the probe connection and ensure it's properly immersed. If the issue persists, the probe may need replacement.

10. User Tips

• Regular Calibration: Calibrate your probes frequently, especially pH and ORP, to ensure the most accurate readings. The accuracy of your measurements directly depends on proper calibration.
• Probe Care: Always keep pH and ORP probes moist when not in use to prolong their lifespan. Never let them dry out completely.
• Data Analysis: Utilize the app's data logging and export features to track trends in your water quality over time. This can help identify potential issues before they become critical.
• Environmental Awareness: Remember the main unit is not waterproof. Protect it from splashes and high humidity to prevent damage.

11. Warranty & Support

For any technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.