1. Uvod
The VIVOSUN Digital pH Meter is designed for accurate measurement of pH levels in various liquids. This pen-type tester provides precise readings for applications such as hydroponics, household drinking water, pools, and aquariums. Its compact design and automatic temperature compensation (ATC) feature ensure reliable performance.

Slika 1.1: The VIVOSUN Digital PH Meter, a pen-type device with a clear LCD display, designed for accurate pH measurement.
Sadržaj paketa:
- VIVOSUN pH Meter
- Uputstvo za upotrebu
- 2 x 1.5V Button Cells (built-in)
- 3 x pH Buffer Powders (for calibration)
2. Proizvod je gotovview
Familiarize yourself with the components of your VIVOSUN Digital pH Meter.

Slika 2.1: Diagram illustrating the components of the VIVOSUN Digital PH Meter, including the battery compartment, power on/off button, backlit LCD display, calibration function button, protective cap, and electrode.
- Zaštitna kapa: Pokriva elektrodu kada se ne koristi.
- Elektroda: The sensor responsible for measuring pH.
- LCD sa pozadinskim osvetljenjem: Displays pH readings and temperature.
- Dugme za uključivanje/isključivanje: Uključuje ili isključuje uređaj.
- Dugme CAL: Pokreće proces kalibracije.
- Pretinac za baterije: Houses the 2 x 1.5V button cells.
3. Specifikacije
Technical specifications for the VIVOSUN Digital pH Meter.

Slika 3.1: Visual representation of the VIVOSUN Digital PH Meter's specifications, including measuring range, resolution, accuracy, weight, power supply, and calibration method.
| Measuring Range | 0.00 - 14.00 pH |
| Rezolucija | 0.01 pH |
| Preciznost | ± 0.01 pH |
| Napajanje | 2 x 1.5V (LR44 Button Cell) |
| Operativno okruženje | 0℃ - 80℃ (32℉ - 176℉) |
| Dimenzije | 15.5 x 2.9 x 1.6 cm |
| Težina | 50g |
| Materijal | ABS |
4. Podešavanje
4.1. Instalacija baterije
The pH meter comes with two 1.5V button cells pre-installed. If replacement is needed:
- Slide off the battery compartment cover located at the top of the meter.
- Remove the old batteries and insert two new 1.5V LR44 button cells, ensuring correct polarity.
- Vratite poklopac odeljka za baterije.
4.2. Početna priprema
Before first use or after prolonged storage:
- Skinite zaštitni poklopac sa elektrode.
- Isperite elektrodu destilovanom vodom.
- Gently blot dry with a clean tissue. Do not rub.
- It is recommended to calibrate the meter before initial use.
5. Kalibracija
Calibration ensures accurate readings. The VIVOSUN pH meter supports one-point, two-point, or three-point calibration. It is recommended to calibrate the pH meter before each use, especially if it hasn't been used for a while or has been exposed to moisture for an extended period.

Slika 5.1: Illustration recommending calibration of the pH meter before each use, particularly if unused for a while or exposed to moisture.
5.1. Preparing Buffer Solutions
The meter comes with three pH buffer powders (pH 4.00, pH 6.86, pH 9.18). To prepare the solutions:
- Empty one packet of buffer powder into a clean 250ml beaker or container.
- Add 250ml of distilled water to the beaker.
- Stir until the powder is completely dissolved.
- Repeat for each buffer powder.
5.2. Calibration Procedure (Three-Point Recommended)

Slika 5.2: Step-by-step visual guide for auto-calibration, showing the process of dissolving buffer powder, immersing the meter, pressing the CAL button, and observing the flashing display.
- Uključite pH metar pritiskom na dugme "UKLJUČENO/ISKLJUČENO".
- Immerse the electrode into the pH 6.86 buffer solution (at 25°C).
- Press and hold the "CAL" button for 5 seconds. The display will flash "6.86" three times, indicating successful calibration at this point.
- Rinse the electrode with distilled water and gently blot dry.
- Immerse the electrode into the pH 4.00 buffer solution (at 25°C).
- Press and hold the "CAL" button for 5 seconds. The display will flash "4.00" three times.
- Rinse the electrode with distilled water and gently blot dry.
- (Optional for three-point calibration) Immerse the electrode into the pH 9.18 buffer solution (at 25°C).
- (Optional) Press and hold the "CAL" button for 5 seconds. The display will flash "9.18" three times.
- After calibration, the meter will automatically save the calibration data and return to measurement mode.
Napomena: If the meter cannot identify the buffer solution, it will display "----" and exit calibration mode. Ensure buffer solutions are correctly prepared and the electrode is clean.
6. Uputstvo za upotrebu
6.1. Measuring pH
- Skinite zaštitni poklopac.
- Rinse the electrode with distilled water and gently blot dry.
- Turn on the meter by pressing the "ON/OFF" button.
- Uronite elektrodu u rastvor koji se testira. Provjerite da je elektroda potpuno uronjena.
- Gently stir the solution and wait for the reading to stabilize. The display will show the pH value.
- The meter features Automatic Temperature Compensation (ATC), which adjusts the pH reading based on the solution's temperature, ensuring accuracy across varying temperatures.

Slika 6.1: Diagram illustrating the Automatic Temperature Compensation (ATC) feature, showing how the meter adjusts for temperature variations (low, heating, cooling, high) to provide reliable pH results.
6.2. Nakon mjerenja
- Isperite elektrodu destilovanom vodom.
- Gently blot dry with a clean tissue.
- Zamijenite zaštitni poklopac.
- Turn off the meter by pressing the "ON/OFF" button.
7. Održavanje
7.1. Cleaning the Electrode
Regular cleaning of the electrode is crucial for accurate readings and extending the meter's lifespan.
- After each use, rinse the electrode thoroughly with distilled water.
- If the electrode is heavily contaminated, soak it in a mild cleaning solution (e.g., pH electrode cleaning solution or a dilute acid solution like vinegar) for 10-20 minutes, then rinse with distilled water.
- Never touch the electrode with your fingers or abrasive materials.
7.2. Skladištenje
- Always replace the protective cap after use to keep the electrode moist. If the electrode dries out, soak it in pH 4.00 buffer solution or electrode storage solution for at least 30 minutes before use.
- Mjerač čuvajte na hladnom i suhom mjestu, dalje od direktne sunčeve svjetlosti i ekstremnih temperatura.
8. Otkrivanje problema
- Netačna očitavanja:
- Ensure the meter is properly calibrated. Recalibrate if necessary.
- Clean the electrode thoroughly.
- Provjerite nivo napunjenosti baterije i zamijenite je ako je niska.
- Ensure the electrode is fully submerged in the solution.
- Spori odgovor:
- The electrode might be dry. Soak it in pH 4.00 buffer solution or electrode storage solution for 30 minutes.
- The electrode might be dirty. Clean it as per maintenance instructions.
- Display Shows "----":
- During calibration, this indicates the meter could not recognize the buffer solution. Recheck buffer preparation and ensure the correct solution is used for the calibration point.
- Outside calibration, this might indicate a sensor error or extremely out-of-range measurement.
- Mjerač se ne uključuje:
- Provjerite ugradnju i polaritet baterije.
- Zamijenite baterije novima.
9. Prijave
The VIVOSUN Digital pH Meter is suitable for a wide range of applications requiring pH measurement.

Slika 9.1: Visual chart displaying various applications for the pH meter, including drinking water, aquariums, hydroponics, swimming pools, brewing, and tap water, alongside a pH scale with common substances.
- hidroponika: Monitoring nutrient solution pH for optimal plant growth.
- akvarijumi: Maintaining ideal water conditions for aquatic life.
- Swimming Pools & Spas: Ensuring proper chemical balance for safety and comfort.
- Household Drinking Water: Checking the pH of tap water or filtered water.
- Laboratorijska upotreba: General pH testing in educational or research settings.
- Liquid Food: Testing pH of beverages or other liquid food products.
- Pivovarstvo: Monitoring pH during beer or wine making processes.

Slika 9.2: Image showing the VIVOSUN Digital PH Meter next to a glass of water, highlighting the optimal pH range for drinking water (6.5 - 8.5).
10. Garancija i podrška
For warranty information or technical support, please refer to the VIVOSUN official webweb-mjesto ili kontaktirajte njihovu korisničku službu. Sačuvajte račun za kupovinu u slučaju reklamacije.
VIVOSUN službenik Webstranica: www.vivosun.com