1. Introduzione
The Lutron HT-305 is a precision pocket-sized humidity meter designed for accurate measurement of relative humidity, temperature, and dew point. This device is ideal for various applications requiring environmental monitoring. This manual provides detailed instructions for the proper setup, operation, and maintenance of your HT-305 meter to ensure optimal performance and longevity.
Figure 1: Lutron HT-305 Pocket Humidity Meter and Probe. This image displays the main unit of the HT-305 meter alongside its detachable humidity/temperature probe.
2. Caratteristiche principali
- Simultaneous display of Humidity, Temperature, and Dew Point.
- High accuracy and fast response time for humidity measurements.
- 0.1%RH resolution for humidity and 0.1° resolution for temperature.
- Pocket size with a separate humidity and temperature probe for easy operation and remote measurement.
- Data Hold function to freeze the displayed value.
- Records Maximum and Minimum readings with Recall function.
- Indicatore di batteria scarica integrato.
- Spegnimento automatico per preservare la durata della batteria.
- Wide humidity and temperature measuring range.
- Microprocessor circuit ensures maximum possible accuracy.
- Heavy duty and compact housing design.
3. Componenti e controlli
Familiarize yourself with the main components and controls of your HT-305 meter:
Figure 2: HT-305 Meter and Accessories. This image shows the HT-305 meter, its detachable probe, a carrying case, and the instruction manual.
- Unità principale: The handheld device housing the display and control buttons.
- Humidity/Temperature Probe: Detachable probe for sensing environmental conditions.
- Schermo LCD: Shows humidity, temperature, and dew point readings.
- Pulsante di accensione: Accende o spegne l'unità.
- Pulsante ATTESA: Blocca la lettura corrente del display.
- Pulsante REC: Activates/deactivates Max/Min recording mode.
- Pulsante FUNZIONE: Cycles through display modes or units.
- Probe Input Jack: Connector for the humidity/temperature probe.
- Vano batteria: Situato nella parte posteriore dell'unità.
Figure 3: HT-305 Display. The LCD shows humidity (4.9%RH), temperature (-40.3°C), and dew point. The "HOLD" indicator is also visible.
Figure 4: HT-305 Buttons and Probe Input. Close-up of the POWER, HOLD, REC, and FUNCTION buttons, along with the probe input jack.
4. Configurazione e utilizzo iniziale
4.1. Installazione della batteria
- Individuare il coperchio del vano batterie sul retro del misuratore.
- Per aprire, far scorrere o svitare il coperchio.
- Insert a new 9V alkaline battery, observing the correct polarity (+/-).
- Riposizionare saldamente il coperchio del vano batteria.
4.2. Collegamento della sonda
- Align the connector of the humidity/temperature probe with the probe input jack on the top of the main unit.
- Gently push the connector into the jack until it is firmly seated. Do not force the connection.
5. Funzionamento
5.1. Accensione/spegnimento
- Per girare il contatore ON, premere il tasto ENERGIA pulsante.
- Per girare il contatore SPENTO, premere e tenere premuto il tasto ENERGIA per circa 2 secondi fino allo spegnimento del display.
5.2. Misurazione
- Ensure the probe is connected and the meter is powered on.
- Position the probe in the environment where you wish to take measurements. Allow sufficient time (typically 10-30 seconds) for the readings to stabilize.
- The LCD will simultaneously display the Relative Humidity (%RH), Temperature (°C or °F), and Dew Point (°C or °F).
5.3. Funzione di conservazione dei dati
- Premere il tasto PRESA button to freeze the current readings on the display. The "HOLD" indicator will appear on the LCD.
- Premere il tasto PRESA button again to release the data hold and resume live measurements.
5.4. Maximum/Minimum Record
- Premere il tasto RICORDA button once to enter Maximum/Minimum recording mode. The "REC" indicator will appear.
- Premere il tasto RICORDA nuovamente il pulsante per visualizzare il Massimo recorded values.
- Premere il tasto RICORDA button a third time to display the Minimo recorded values.
- Premere e tenere premuto il tasto RICORDA button for approximately 2 seconds to exit recording mode and clear the recorded values.
5.5. Unit Selection (Temperature)
- Premere il tasto FUNZIONE button to toggle between Celsius (°C) and Fahrenheit (°F) for temperature and dew point readings.
5.6. Spegnimento automatico
The meter features an automatic power-off function to conserve battery life. If no buttons are pressed for approximately 10 minutes, the meter will automatically shut down. This feature can typically be disabled by holding a specific button during power-on (refer to the original manual for specific instructions if this feature needs to be disabled).
6. Manutenzione
6.1. Sostituzione della batteria
When the low battery indicator appears on the display, replace the 9V battery as described in the "Battery Installation" section (4.1). Prompt battery replacement ensures accurate readings and prevents potential damage from battery leakage.
6.2. Pulizia
- Pulisci il contatore casing con un morbido, damp panno. Non usare detergenti abrasivi o solventi.
- Keep the humidity sensor on the probe clean and free from dust or debris. Avoid touching the sensor directly.
6.3. Conservazione
When not in use for extended periods, remove the battery to prevent leakage. Store the meter and probe in a cool, dry place, preferably in its protective carrying case.
7. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Il misuratore non si accende. | Batteria scarica o installata in modo errato. | Sostituire la batteria da 9 V, assicurandosi della corretta polarità. |
| Le letture sono instabili o imprecise. | Probe not fully connected; sensor dirty; environment not stable. | Ensure probe is securely connected. Clean the sensor carefully. Allow more time for readings to stabilize in the measurement area. |
| "LO BAT" indicator displayed. | Basso volume della batteriatage. | Sostituire immediatamente la batteria da 9 V. |
| No Dew Point reading. | Dew Point calculation requires both humidity and temperature. | Ensure both humidity and temperature sensors are functioning correctly and providing valid data. |
8. Specifiche
Specifiche generali:
- Circuito: Un chip personalizzato del circuito LSI del microprocessore.
- Display: LCD size 44 mm x 29 mm, dual function LCD display.
- Unità di misura: Humidity: %RH (Relative Humidity), Temperature: °C or °F, Dew Point: °C or °F.
- Tempo di risposta: Tipicamente da 10 a 30 secondi.
- Compensazione della temperatura: Automatic, for humidity function.
- Data Hold: Blocca la lettura del display.
- Richiamo della memoria: Valore massimo e minimo.
- Samptempo di ling: Circa. 0.8 secondo.
- Spegni: Lo spegnimento automatico consente di risparmiare la durata della batteria.
- Temperatura di esercizio: Main instrument: 0 to 50 °C.
- Umidità di esercizio: Probe: 0 to 95% RH. Main instrument: Less than 85% R.H.
- Alimentazione elettrica: 006P DC 9V battery (Alkaline or Heavy duty type).
- Corrente di alimentazione: ca. 6 mA CC.
- Peso: 264 g / 0.67 LB (Battery is included).
- Dimensioni: Main instrument: 135 x 60 x 33 mm (5.3 x 2.4 x 1.3 inch). Humidity Sensor Probe: 197 mm (7.8 inch) in length.
- Accessori inclusi: Instruction manual, Humidity probe, Hard carrying case (CA-06), Soft carrying case (CA-05A).
Electrical Specifications (23 ± 5 °C):
| Misurazione | Allineare | Risoluzione | Precisione |
|---|---|---|---|
| Umidità | Dal 10% al 95% di umidità relativa | 0.1% UR | ≤ 70% RH: ± 3% RH. |
| > 70% RH: ± (3% reading + 1% RH). | |||
| Temperatura | -20 a 60 °C | 0.1 gradi | ± 0.8 °C |
| ± 1.5 °F | |||
| Punto di rugiada | -25.3 a 48.9 °C | 0.1 °C | |
| -13.5 a 120.1 °F | 0.1 °F |
Remark: Dew Point display value is calculated from the Humidity/Temp. measurement automatically. The Dew Point accuracy is sum accuracy value of Humidity & Temperature measurement.
9. Garanzia e supporto
For warranty information and technical support, please refer to the documentation included with your product or contact Lutron customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
