5 in 1 Water Quality Tester User Manual

การแนะนำ

The JUANJUAN 5-in-1 Water Quality Tester (Model 9909) is a versatile digital instrument designed for precise measurement of various water parameters. It accurately measures pH, Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity, and Temperature. This device is ideal for a wide range of applications including testing drinking water, aquariums, swimming pools, fisheries, and laboratory use.

Figure 1: 5-in-1 Water Quality Tester with PH, EC, TDS ranges and calibration powders.

Figure 2: Tester in use, demonstrating its 5-in-1 functionality.

การตั้งค่า

1. การติดตั้งแบตเตอรี่

The tester requires three 1.5V LR44 button batteries (not included). To install or replace batteries:

1. Locate the battery compartment, typically at the top of the device.
2. เปิดฝาครอบช่อง
3. Insert the three 1.5V LR44 button batteries, ensuring correct polarity.
4. ปิดฝาช่องใส่แบตเตอรี่ให้แน่น

Figure 3: Battery compartment and electrode detail.

2. การสอบเทียบเบื้องต้น

For accurate readings, it is crucial to calibrate the tester before first use and periodically thereafter.

การสอบเทียบค่า pH:

The device supports 1-point, 2-point, or 3-point automatic calibration. Calibration solutions are typically included or can be purchased separately.

1. Prepare pH buffer solutions (e.g., pH 6.86, pH 4.00, pH 9.18).
2. เปิดเครื่องทดสอบ
3. จุ่มอิเล็กโทรดลงในสารละลายบัฟเฟอร์แรก (เช่น pH 6.86)
4. Press the "MODE/CAL" button to enter calibration mode. The device will automatically identify the solution.
5. Once stable, rinse the electrode with distilled water and repeat for other buffer solutions if performing 2-point or 3-point calibration.

EC/TDS/Salinity Calibration:

The device supports 3-point automatic calibration for conductivity (EC).

1. Prepare EC calibration solutions (e.g., 1413 uS/cm, 12.88 mS/CM, 111.8 mS/CM).
2. เปิดเครื่องทดสอบ
3. Immerse the electrode into the first EC calibration solution.
4. Press the "MODE/CAL" button to enter calibration mode. The device will automatically identify the solution.
5. Once stable, rinse the electrode with distilled water and repeat for other EC calibration solutions.

Figure 4: Calibration powders for pH measurement.

คำแนะนำการใช้งาน

1. ขั้นตอนการวัดโดยทั่วไป

1. ถอดฝาครอบป้องกันออกจากโพรบ
2. Rinse the electrode with distilled water before each use.
3. Press the "Open key" (power button) to turn on the tester.
4. จุ่มอิเล็กโทรดลงในสารละลายample solution, ensuring the liquid level is below the cap.
5. Gently stir the solution and wait for the reading to stabilize.
6. Press the "HOLD/TEMP" button to hold the current reading on the display. Press again to release.
7. To switch between measurement modes (PH, EC, TDS, Salinity, Temperature), press the "MODE/CAL" button repeatedly.
8. After use, press the "Open key" to turn off the tester.
9. Rinse the electrode with distilled water and replace the protective cover.

2. Backlight Function (for models with backlight)

Some models of the 9909 tester feature a backlight for improved visibility in low-light conditions. If your model has a backlight, it will typically activate automatically when the device is turned on or can be toggled via a specific button press (refer to the device's display for indication).

Figure 5: Tester with backlight display.

Figure 6: Tester without backlight display.

3. Key Functions Overview

• Open Key (Power Button): Turns the device ON/OFF.
• HOLD/TEMP Key: Holds the current reading; also switches between Celsius (°C) and Fahrenheit (°F) for temperature display.
• MODE/CAL Key: Cycles through measurement modes (PH, EC, TDS, Salinity, Temperature); also initiates calibration mode.

Figure 7: Labeled parts of the water quality tester.

แอปพลิเคชั่น

The 5-in-1 Water Quality Tester is suitable for a variety of water testing needs:

• น้ำดื่ม: Ensure the quality and safety of your tap or bottled water.
• Aquariums & Fish Tanks: Monitor water parameters crucial for aquatic life health.
• สระว่ายน้ำ: Maintain optimal chemical balance for safe and clean swimming.
• การประมง: Assess water conditions for aquaculture and fish farming.
• ห้องปฏิบัติการ: Perform routine water quality analysis for various experiments and tests.

Figure 8: Diverse applications of the water quality tester.

การซ่อมบำรุง

1. การทำความสะอาดอิเล็กโทรด

Always clean the electrode with distilled water after each use to prevent contamination and ensure accurate readings. Do not use tap water or abrasive materials.

2. การจัดเก็บ

Store the tester with the protective cap on. For pH electrodes, it is recommended to keep the electrode moist with a storage solution or a few drops of distilled water in the cap to prevent drying out.

3. การเปลี่ยนแบตเตอรี่

Replace the three 1.5V LR44 button batteries when the display indicates low power or the device fails to turn on. Refer to the "Battery Installation" section for instructions.

การแก้ไขปัญหา

• การอ่านค่าที่ไม่ถูกต้อง:
  • Ensure the electrode is clean.
  • Re-calibrate the tester, especially if it hasn't been used for a while or if readings seem off.
  • ตรวจสอบระดับแบตเตอรี่และเปลี่ยนใหม่หากเหลือน้อย
• pH Calibration Failure:
  • If the calibration solution is not recognized, the electrode might be damaged or worn out and may need replacement.
  • Ensure correct buffer solutions are used and they are not expired.
• อุปกรณ์ไม่เปิด:
  • ตรวจสอบว่าติดตั้งแบตเตอรี่อย่างถูกต้องหรือไม่
  • เปลี่ยนแบตเตอรี่ใหม่

ข้อมูลจำเพาะ

• หมายเลขรุ่น: 9909
• ชื่อยี่ห้อ: JUANJUAN
• ประเภทจอภาพ: ดิจิทัล
• แสงไฟแบ็คไลท์: Available in "with backlight" and "no backlight" variants.
• แหล่งพลังงาน: 3 x 1.5V LR44 button batteries (not included)
• ขนาด: 183 x 37 x 37 มม. (7.2 x 1.5 x 1.5 นิ้ว)
• น้ำหนัก: 90 ก. (3.2 ออนซ์)
• ต้นทาง: จีนแผ่นดินใหญ่

เคล็ดลับสำหรับผู้ใช้

• Salinity Measurement Units: The tester measures salinity in percentage (%). If you require readings in parts per million (ppm), you will need to convert the percentage value (1% = 10,000 ppm).
• การทำความสะอาดเป็นประจำ: Always rinse the electrode thoroughly with distilled water after each use to prevent residue buildup, which can affect accuracy.
• การจัดเก็บอย่างเหมาะสม: Keep the electrode moist when not in use, especially for pH measurements, to prolong its lifespan.
• ความถี่ในการสอบเทียบ: Calibrate the device regularly, especially if you notice inconsistent readings or if the device has been stored for an extended period.

การรับประกันและการสนับสนุน

For specific warranty details, repair services, or technical support, please contact the seller or refer to the documentation provided at the time of purchase. Keep your purchase receipt as proof of purchase.