Manuale utente del misuratore di pH elettronico a penna Lutron PH-222

1. Introduzione

This manual provides comprehensive instructions for the proper setup, operation, calibration, and maintenance of the Lutron PH-222 Electronic Pen pH Meter. The PH-222 is a portable, high-precision instrument designed for accurate pH measurements in various applications, including water quality testing, laboratory analysis, and industrial processes. Adherence to these instructions will ensure optimal performance and longevity of the device.

2. Informazioni sulla sicurezza

Please read and understand all safety instructions before operating the Lutron PH-222 pH Meter. Failure to follow these guidelines may result in injury or damage to the instrument.

• Always handle the pH electrode with care. The glass bulb is fragile.
• Do not ingest pH buffer solutions. In case of accidental ingestion, seek medical attention immediately.
• Tenere il dispositivo lontano da temperature estreme, luce solare diretta e umidità elevata.
• Ensure the battery compartment is properly sealed to maintain the IP-67 waterproof rating.
• Smaltire le batterie usate secondo le normative locali.
• Do not attempt to disassemble or modify the meter, as this will void the warranty and may cause damage.

3. Contenuto della confezione

Dopo aver disimballato, verificare che tutti gli articoli elencati di seguito siano presenti e integri:

• Lutron PH-222 Electronic Pen pH Meter
• Manuale operativo
• Certificato di calibrazione
• pH 4.00 Buffer Solution (small bottle)
• pH 7.00 Buffer Solution (small bottle)

Figura 3.1: Contents of the Lutron PH-222 package. This image displays the PH-222 pen pH meter, its operation manual, a calibration certificate, and two small bottles of pH buffer solutions (pH 4.00 and pH 7.00).

4. Caratteristiche del prodotto

The Lutron PH-222 pH Meter incorporates several features designed for user convenience and accurate measurement:

• Easy to Change the pH Electrode: Facilitates quick replacement of the sensing electrode.
• High Input Impedance: Ensures minimal current draw from the pH electrode, leading to stable and accurate readings.
• Data Hold Function: Allows freezing of the displayed value for convenient recording.
• Spegnimento automatico: preserva la durata della batteria spegnendosi automaticamente dopo un periodo di inattività.
• 100 Point Data Logger with Recall: Stores up to 100 measurement points for later review.
• IP-67 Waterproof Rating: Provides protection against dust and immersion in water up to 1 meter for 30 minutes.

Figura 4.1: Davanti view of the Lutron PH-222 Electronic Pen pH Meter, showing the display and control buttons (POWER, HOLD, REC).

5. Impostazione

5.1 Installazione della batteria

The Lutron PH-222 requires batteries for operation (not included in the package). To install or replace batteries:

1. Twist the top cap of the meter counter-clockwise to open the battery compartment.
2. Inserire due batterie AAA da 1.5 V, rispettando la polarità corretta (+/-) come indicato all'interno del vano.
3. Securely close the battery compartment by twisting the cap clockwise until it is tight to maintain the waterproof seal.

5.2 Electrode Preparation

1. Carefully remove the protective cap from the bottom of the pH electrode. The cap typically contains a small amount of storage solution to keep the electrode moist.
2. Rinse the electrode tip with distilled or deionized water to remove any residual storage solution. Gently blot dry with a lint-free tissue. Do not rub the glass bulb.

6. Funzionamento

6.1 Accensione/spegnimento

Premere il tasto ENERGIA pulsante per accendere o spegnere il misuratore.

6.2 Esecuzione di una misurazione

1. Ensure the meter is calibrated (refer to Section 7).
2. Immerse the pH electrode tip into the sampla soluzione, assicurandosi che il bulbo di vetro sia completamente immerso.
3. Gently stir the solution to ensure homogeneity and allow the reading to stabilize. The display will show the pH value.
4. Registrare la lettura stabile del pH.
5. Dopo la misurazione, sciacquare l'elettrodo con acqua distillata e riposizionare il cappuccio protettivo.

6.3 Funzione di conservazione dei dati

Per congelare la lettura corrente sul display, premere il tasto PRESA button. Press it again to release the hold and return to live measurement.

6.4 Data Logging and Recall

The PH-222 can store up to 100 measurement points. Refer to the detailed operation manual included in the package for specific instructions on how to use the RICORDA button for data logging and recall functions.

7. Calibrazione

Regular calibration is essential for accurate pH measurements. The Lutron PH-222 supports multi-point calibration using standard buffer solutions. It is recommended to calibrate the meter before each use or if readings appear inaccurate.

7.1 Calibration Procedure (Two-Point)

The PH-222 typically uses a two-point calibration with pH 7.00 and pH 4.00 (or pH 10.00) buffer solutions.

1. Prepare fresh pH 7.00 and pH 4.00 buffer solutions. Ensure they are at the same temperature as your sampmeno.
2. Turn on the meter and rinse the electrode with distilled water.
3. Immergere l'elettrodo nella soluzione tampone a pH 7.00.
4. Premere e tenere premuto il tasto CAL button (often integrated with the REC button, refer to the device's specific button functions) until the calibration mode is activated. The display will typically show 'CAL' or a flashing pH value.
5. Wait for the reading to stabilize. The meter will automatically recognize the buffer and complete the calibration for pH 7.00.
6. Sciacquare l'elettrodo con acqua distillata.
7. Immergere l'elettrodo nella soluzione tampone a pH 4.00.
8. Repeat the calibration process. The meter will automatically recognize the buffer and complete the calibration for pH 4.00.
9. Once calibration is complete, the meter will return to measurement mode.

Figura 7.1: Standard pH 4.00 and pH 7.00 buffer solutions used for calibrating the pH meter.

8. Manutenzione

8.1 Electrode Care and Storage

• Always keep the electrode tip moist. Never allow the electrode to dry out. Store it in its protective cap containing a small amount of storage solution (or 3M KCl solution).
• Rinse the electrode with distilled water after each use to prevent contamination.
• If the electrode becomes dirty or fouled, clean it gently according to the instructions in the full operation manual.
• Replace the electrode when it no longer calibrates correctly or provides stable readings.

8.2 Pulizia generale

Wipe the meter body with a damp panno. Non usare detergenti abrasivi o solventi.

8.3 Sostituzione della batteria

Replace batteries when the low battery indicator appears on the display or if the meter fails to power on. Refer to Section 5.1 for battery installation instructions.

9. Risoluzione Dei Problemi

10. Specifiche

11. Garanzia e supporto

For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or contact your authorized Lutron dealer or the manufacturer directly. Ensure you have your product model number (PH-222) and purchase details available when seeking support.