1. Introduction
This manual provides comprehensive instructions for the TEKCOPLUS TK295PLUS pH electrode. This electrode is designed for accurate and reliable pH measurement across a wide range of applications, connecting to compatible pH meters or controllers via a standard BNC connector. It features a durable design, a long cable for flexible placement, and automatic temperature compensation capabilities when used with a compatible meter.
Image 1.1: The TEKCOPLUS TK295PLUS pH electrode with its protective cap.
2. Product Features
- Measuring Range: 0.00 to 14.00 pH, suitable for most aqueous solutions.
- Automatic Temperature Compensation (ATC): Operates effectively in temperatures ranging from 0°C to 50°C, ensuring accurate readings regardless of temperature fluctuations (requires a compatible pH meter with ATC function).
- Long Cable Length: Approximately 300 cm (3 meters) cable provides extended reach and flexibility for various setups.
- Standard BNC Connector: Ensures broad compatibility with most pH meters, controllers, and testers.
- Large Probe Diameter: A 1.2 cm probe diameter contributes to stability and durability during measurements.
- Wide Application: Ideal for testing pH levels in drinking water, swimming pools, aquariums, wine, RO systems, spas, hydroponics, laboratories, and wastewater treatment.
Image 2.1: Key features of the pH electrode, including measuring range and cable length.
Image 2.2: The electrode shown in water, highlighting its Automatic Temperature Compensation capability.
Image 2.3: Examples of various applications for the pH electrode, such as wastewater, swimming pools, laboratories, and hydroponics.
3. Setup
- Unpacking and Inspection: Carefully remove the pH electrode from its packaging. Inspect the electrode for any visible damage. Ensure the protective cap is securely in place.
- Connecting the Electrode: Connect the BNC connector of the electrode cable to the corresponding BNC input port on your pH meter or controller. Ensure the connection is firm and secure.
- Rinsing: Before first use and after storage, rinse the electrode tip with distilled or deionized water. Do not wipe the glass bulb; gently blot it dry with a soft tissue.
- Initial Calibration: For accurate measurements, the pH electrode must be calibrated with your pH meter using standard buffer solutions (e.g., pH 4.01, pH 6.86, pH 9.18). Refer to your pH meter's manual for specific calibration procedures. Typically, a two or three-point calibration is recommended.
Image 3.1: Diagram showing the sensor, BNC connector, and sensor cover of the pH electrode.
Image 3.2: The pH electrode shown alongside calibration buffer powders (pH 4.01, pH 6.86, pH 9.18) for accurate calibration.
4. Operating Instructions
- Preparation: Ensure the electrode is clean and calibrated. Remove the protective cap from the electrode tip.
- Immersion: Immerse the electrode tip into the sample solution, ensuring the glass bulb and junction are fully submerged. Stir gently to ensure homogeneity and allow the reading to stabilize.
- Reading: Wait for the pH reading on your connected meter to stabilize. The stabilization time may vary depending on the sample and electrode condition.
- Rinsing After Use: After each measurement, rinse the electrode thoroughly with distilled or deionized water to prevent cross-contamination and residue buildup.
- Storage: Replace the protective cap, ensuring the sponge or cotton inside is kept moist with a storage solution (or pH 4 buffer if storage solution is unavailable). Never store the electrode dry.
5. Maintenance
- Cleaning: If the electrode becomes sluggish or readings are inconsistent, clean it. For general cleaning, soak the electrode in a mild cleaning solution (e.g., 0.1 M HCl or a specialized electrode cleaning solution) for 15-30 minutes, then rinse thoroughly with distilled water.
- Storage: Always store the electrode with its protective cap filled with a pH electrode storage solution. If storage solution is not available, a pH 4 buffer solution can be used. Never store the electrode in distilled water for extended periods, as this can deplete the electrolyte and shorten its lifespan.
- Calibration: Calibrate the electrode regularly, ideally before each critical measurement session or at least once a week for frequent use. Frequent calibration ensures optimal accuracy.
- Electrolyte Level: For refillable electrodes (if applicable to your specific model), ensure the electrolyte level is maintained. This model is typically a sealed electrode.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Inaccurate or drifting readings | Electrode not calibrated, dirty electrode, depleted electrolyte, air bubbles on bulb. | Recalibrate the electrode. Clean the electrode. Ensure proper storage. Gently tap the electrode to dislodge air bubbles. |
| Slow response time | Dirty electrode, clogged junction, old electrode. | Clean the electrode thoroughly. Soak in cleaning solution. If problem persists, the electrode may need replacement. |
| No reading or erratic readings | Loose BNC connection, damaged cable, broken glass bulb, electrode stored dry. | Check BNC connection. Inspect cable for damage. Replace electrode if glass bulb is broken or if it was stored dry for too long. |
7. Specifications
| Parameter | Value |
|---|---|
| Model Number | TK295PLUS |
| Measuring Range | 0.00 ~ 14.00 pH |
| Automatic Temperature Compensation (ATC) Range | 0°C ~ 50°C (requires compatible meter) |
| Cable Length | Approximately 300 cm |
| Connector Type | BNC (50 ohms) |
| Probe Diameter | 1.2 cm |
| Electrode Length | 14.7 cm |
| Product Dimensions (L x W x H) | 17.81 x 5.69 x 3.2 cm |
| Product Weight | 175 grams |
| Material | PLA |
| Manufacturer | TekcoPlus Ltd |
| UPC | 713072684626 |
Image 7.1: Visual representation of the pH electrode's dimensions, including overall length, probe diameter, and cable length.
8. Warranty and Support
Warranty information for the TEKCOPLUS TK295PLUS pH electrode is typically provided at the time of purchase or included with the product packaging. Please refer to these documents for details regarding warranty coverage and terms.
For technical support, troubleshooting assistance beyond this manual, or inquiries about replacement parts, please contact TEKCOPLUS customer service through the retailer where the product was purchased or visit the official TEKCOPLUS website for contact information.
