Úvod
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.
Nastavenie
1. Inštalácia batérie
The tester requires three 1.5V LR44 button batteries (not included). To install or replace batteries:
- Locate the battery compartment, typically at the top of the device.
- Otvorte kryt priehradky.
- Insert the three 1.5V LR44 button batteries, ensuring correct polarity.
- Bezpečne zatvorte kryt priestoru pre batérie.
Figure 3: Battery compartment and electrode detail.
2. Počiatočná kalibrácia
For accurate readings, it is crucial to calibrate the tester before first use and periodically thereafter.
Kalibrácia pH:
The device supports 1-point, 2-point, or 3-point automatic calibration. Calibration solutions are typically included or can be purchased separately.
- Prepare pH buffer solutions (e.g., pH 6.86, pH 4.00, pH 9.18).
- Zapnite tester.
- Ponorte elektródu do prvého tlmivého roztoku (napr. pH 6.86).
- Press the "MODE/CAL" button to enter calibration mode. The device will automatically identify the solution.
- 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).
- Prepare EC calibration solutions (e.g., 1413 uS/cm, 12.88 mS/CM, 111.8 mS/CM).
- Zapnite tester.
- Immerse the electrode into the first EC calibration solution.
- Press the "MODE/CAL" button to enter calibration mode. The device will automatically identify the solution.
- Once stable, rinse the electrode with distilled water and repeat for other EC calibration solutions.
Figure 4: Calibration powders for pH measurement.
Návod na obsluhu
1. General Measurement Procedure
- Odstráňte ochranný kryt zo sondy.
- Rinse the electrode with distilled water before each use.
- Press the "Open key" (power button) to turn on the tester.
- Ponorte elektródu doample solution, ensuring the liquid level is below the cap.
- Roztok jemne premiešajte a počkajte, kým sa nameraná hodnota stabilizuje.
- Press the "HOLD/TEMP" button to hold the current reading on the display. Press again to release.
- To switch between measurement modes (PH, EC, TDS, Salinity, Temperature), press the "MODE/CAL" button repeatedly.
- After use, press the "Open key" to turn off the tester.
- 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. Kľúčové funkcieview
- 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.
Aplikácie
The 5-in-1 Water Quality Tester is suitable for a variety of water testing needs:
- Pitná voda: Ensure the quality and safety of your tap or bottled water.
- Aquariums & Fish Tanks: Monitor water parameters crucial for aquatic life health.
- Bazény: Maintain optimal chemical balance for safe and clean swimming.
- Fisheries: Assess water conditions for aquaculture and fish farming.
- Laboratóriá: Perform routine water quality analysis for various experiments and tests.
Figure 8: Diverse applications of the water quality tester.
Údržba
1. Čistenie elektródy
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. Skladovanie
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. Výmena batérie
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.
Riešenie problémov
- Nepresné čítania:
- Ensure the electrode is clean.
- Re-calibrate the tester, especially if it hasn't been used for a while or if readings seem off.
- Skontrolujte úroveň nabitia batérie a v prípade nízkej úrovne vymeňte.
- 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.
- Zariadenie sa nezapína:
- Skontrolujte, či sú batérie správne nainštalované.
- Vymeňte batérie za nové.
Špecifikácie
| Parameter | Rozsah | Rozlíšenie | Presnosť |
|---|---|---|---|
| pH | pH 0.01 – 14.00 | 0.01 pH | ± 0.05 pH |
| EC (elektrická vodivosť) | 0 - 10000 uS/cm; 10.01 - 19.99 mS; 20.1 - 400 mS/CM | 1 uS/cm; 0.1 mS/CM | ±2 % čítania |
| TDS (celkový obsah rozpustených tuhých látok) | 0 - 1000 ppm; 1000 ppm - 10000 ppm; 10.1 - 200.0 ppt | 1 ppm; 0.1 ppt | ±2 % čítania |
| Slanosť | 0.00 – 25.00 % | 0.01 % | 0.01-5.00% (±0.1%); 5.10-25.00% (±1%) |
| Teplota | 0.1 – 60.0 °C (32.0 – 140 °F) | N/A | N/A |
- Číslo modelu: 9909
- Názov značky: JUANJUAN
- Typ zobrazenia: DIGITÁLNE
- Podsvietenie: Available in "with backlight" and "no backlight" variants.
- Zdroj napájania: 3 x 1.5V LR44 button batteries (not included)
- Rozmery: 183 x 37 x 37 mm (7.2 x 1.5 x 1.5 palca)
- Hmotnosť: 90 g (3.2 oz)
- Pôvod: Pevninskej Číne
Tipy pre používateľa
- 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).
- Pravidelné čistenie: Always rinse the electrode thoroughly with distilled water after each use to prevent residue buildup, which can affect accuracy.
- Správne skladovanie: Keep the electrode moist when not in use, especially for pH measurements, to prolong its lifespan.
- Kalibračná frekvencia: Calibrate the device regularly, especially if you notice inconsistent readings or if the device has been stored for an extended period.
Záruka a podpora
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.
