1. Introducció
Thank you for choosing the BENETECH GM760 Digital LCD PH Meter. This high-precision, waterproof device is designed for accurate measurement of pH levels and temperature in various solutions. Featuring an easy-to-read LCD display, automatic calibration, and temperature compensation, it is ideal for a wide range of applications including laboratories, aquariums, hydroponics, and water quality testing. Please read this manual thoroughly before use to ensure proper operation and to maximize the lifespan of your device.
2. Informació de seguretat
- Always handle the glass electrode with care.
- Do not immerse the entire meter in water; only the electrode tip is designed to be submerged.
- Mantingueu el dispositiu fora de l'abast dels nens.
- Store the meter in a cool, dry place when not in use.
- No intenteu desmuntar ni modificar el dispositiu, ja que això anul·larà la garantia.
- Eliminar les bateries segons la normativa local.
3. Contingut del paquet
En obrir el paquet, comproveu que tots els elements hi siguin presents i que no estiguin danyats:
- BENETECH GM760 PH Meter (or selected model: GM761, GM762, GM763)
- Manual d'usuari
- Button Battery LR44 1.5V * 3 (may be pre-installed)
- Protective cap for electrode
4. Producte acabatview
Familiarize yourself with the components and controls of your PH meter:
Figura 1: Frontal view of the GM760 PH Meter with protective cap.
Figura 2: Frontal view of the GM760 PH Meter with electrode exposed.
Figure 3: Hand holding the GM760 PH Meter, showing the LCD display and control buttons.
Components clau:
- Pantalla LCD: Shows pH and temperature readings, battery indicator, and hold function.
- Botó d'engegada (encesa/apagada): Per encendre o apagar el dispositiu.
- Botó HOLD: To freeze the current reading on the display.
- Botó ℃/℉: To switch between Celsius and Fahrenheit temperature units.
- Botó CAL: For initiating the automatic calibration process.
- Elèctrode: The sensor tip for measuring pH and temperature.
- Tapa protectora: Covers the electrode when not in use to keep it moist and protected.
5. Configuració
5.1 Instal·lació de la bateria
The GM760 PH Meter uses 3 LR44 1.5V button batteries. If the display does not turn on or shows a low battery indicator, replace the batteries:
- Locate the battery compartment, usually at the top of the meter.
- Obriu la tapa del compartiment de la bateria.
- Insert three LR44 1.5V button batteries, ensuring correct polarity (+/-).
- Tanqueu bé la tapa del compartiment de la bateria.
5.2 Preparació inicial
- Remove the protective cap from the electrode tip. If the electrode is dry, soak it in distilled water for 10-15 minutes before first use.
- Rinse the electrode with distilled water before each use.
6. Funcionament
6.1 Engegada/apagada
- Premeu el botó Poder botó per encendre el mesurador.
- Manteniu premut el botó Poder button for a few seconds to turn the meter OFF. The device features power-off memory, retaining previous settings.
6.2 Taking Measurements (pH and Temperature)
- Enceneu el comptador.
- Immerse the electrode tip into the solution to be tested. Ensure the electrode is fully submerged but do not immerse the entire meter.
- Gently stir the solution and wait for the reading to stabilize on the LCD display. The display will show both pH and temperature.
- Després de la mesura, esbandiu l'elèctrode amb aigua destil·lada i torneu a col·locar la tapa protectora.
Figure 4: GM760 PH Meter measuring a solution.
6.3 Calibration (Automatic)
The GM760 features automatic calibration. Regular calibration ensures accuracy. It is recommended to calibrate the meter before first use, after long periods of inactivity, or if readings appear inaccurate.
- Prepare standard buffer solutions (e.g., pH 4.00, pH 6.86, pH 9.18).
- Turn on the meter and immerse the electrode into the first buffer solution (e.g., pH 6.86).
- Premeu el botó CAL button. The meter will automatically recognize the buffer solution and calibrate itself. Wait for the reading to stabilize and for the calibration indicator to confirm completion.
- Esbandiu l'elèctrode amb aigua destil·lada.
- Repeat the process for other buffer solutions (e.g., pH 4.00 and pH 9.18) if multi-point calibration is desired for higher accuracy.
6.4 Funció de retenció de dades
Durant la mesura, premeu el botó MANTENIM button to freeze the current reading on the display. Press it again to release the hold and resume live measurement.
6.5 Interruptor de la unitat de temperatura
Premeu el botó ℃ / ℉ button to toggle the temperature display between Celsius and Fahrenheit.
7. Manteniment
7.1 Neteja de l'elèctrode
- Always rinse the electrode with distilled water before and after each use to prevent contamination.
- If the electrode is heavily soiled, gently clean it with a soft brush and a mild detergent solution, then rinse thoroughly with distilled water.
7.2 Emmagatzematge
- Always replace the protective cap after use. The cap should contain a small amount of electrode storage solution or pH 4.0 buffer solution to keep the electrode moist. Never store the electrode dry.
- Guardeu el mesurador en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
7.3 Substitució de la bateria
Refer to section 5.1 for instructions on replacing the LR44 batteries when the low battery indicator appears or the device fails to power on.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El comptador no s'encén | Piles gastades o instal·lades incorrectament. | Replace batteries (LR44 x 3) and ensure correct polarity. |
| Lectures inexactes o inestables | Dirty electrode, dry electrode, or meter needs calibration. | Clean the electrode, soak in distilled water, or perform calibration. |
| Temps de resposta lent | Electrode is dry or aged. | Soak electrode in storage solution or distilled water. If problem persists, electrode may need replacement. |
| Temperature reading incorrect | Sensor issue or environmental factors. | Ensure the meter has acclimatized to the environment. If problem persists, contact support. |
9. Especificacions
The following table outlines the technical specifications for the GM760 series PH meters:
Figure 5: Product Parameters for GM760 and GM761.
| Paràmetre | GM760 | GM761 (for comparison) |
|---|---|---|
| Interval de mesura de PH | 0.0 ~ 14.0 pH | 0.00 ~ 14.00 pH |
| Relació de resolució de PH | 0.1 | 0.01 |
| Error de mesura de PH | ±0.1% | ±0.1% |
| Interval de mesura de temperatura | 0 ~ 60 ℃ (32 ~ 140 ℉) | |
| Relació de resolució de temperatura | 1℃ | |
| Error de temperatura | ± 1.0 ℃ | |
| Font d'alimentació | Bateria de botó LR44 1.5 V * 3 | |
| Mostra | LCD large screen display | |
| Temperatura ambient de treball | 0 ~ 60 ℃ | |
| Humitat de l'entorn de treball | ≤85% HR | |
| Llum de fons | Llum de fons blanc | |
| Dimension (Size) | 41 * 42 * 189.23 mm | |
| Pes | 83.8 g | |
| Calibració | Calibració automàtica | |
| Funció | Compensació de temperatura de la solució | |
Figure 6: Measurement Range and Working Environment.
10. Aplicacions
The BENETECH GM760 PH Meter is suitable for a variety of applications, including but not limited to:
- Industrial processes
- Agricultural testing
- Drinking water quality monitoring
- Medical and laboratory research
- Aquariums and hydroponics
Figure 7: Range of Applications.
11. Garantia i Suport
The BENETECH GM760 Digital LCD PH Meter comes with a 1 any de garantia des de la data de compra. Aquesta garantia cobreix els defectes de fabricació i els mals funcionaments en condicions d'ús normal. No cobreix els danys causats per un mal ús, accidents, modificacions no autoritzades o un manteniment inadequat.
For technical support, warranty claims, or service inquiries, please contact your retailer or the BENETECH customer service department with your purchase details.
