Pwodwi souview
The Extech RH300 is a compact digital psychrometer designed for field applications, providing simultaneous measurements of relative humidity, air temperature, dew point, and wet bulb temperature. Its robust design includes a unique sensor cap for protection during storage.
This device is capable of calculating T1-T2 differential (air temperature minus external probe temperature) when an optional TP890 probe is used, and also T2 minus dew point. Advanced features include Data Hold, selectable Auto Power Off, and MAX/MIN/Average reading capabilities.
Figi 1: Devan view of the Extech RH300 Digital Psychrometer, showing the display and control buttons.
Enfòmasyon sou Sekirite
Please read and understand all safety precautions before operating the Extech RH300. Failure to follow these instructions may result in injury or damage to the device.
- Pa ekspoze aparèy la anba tanperati ekstrèm oswa anba limyè solèy dirèk pou yon peryòd tan pwolonje.
- Evite jete aparèy la oswa soumèt li a gwo enpak.
- Pa eseye demonte oswa modifye aparèy la. Konfye tout antretyen bay pèsonèl kalifye.
- Ensure proper battery installation and disposal according to local regulations.
- Keep the sensor cap closed when the device is not in use to protect the sensor.
Enstalasyon
Enstalasyon batri
The Extech RH300 requires two AAA (1.5V) batteries for operation. Follow these steps to install the batteries:
- Jwenn kouvèti konpatiman batri a sou dèyè aparèy la.
- Glise kouvèti a louvri nan direksyon flèch la endike a.
- Insert two AAA batteries, ensuring correct polarity (+ and -) as marked inside the compartment.
- Fèmen kouvèti konpatiman batri a byen fèm jiskaske li fè yon klik an plas.
Figi 2: Dèyè view of the Extech RH300, showing the battery compartment and two AAA batteries.
Premye pouvwa sou
After installing the batteries, press the ON/OFF button to power on the device. The display will illuminate and show the current humidity and temperature readings.
Enstriksyon Operasyon
Pran mezi
To ensure accurate readings, allow the device to stabilize in the measurement environment for a few minutes. Keep the sensor clear of obstructions.
- Relative Humidity (%RH): Displayed on the top line of the LCD.
- Tanperati lè a: Displayed on the middle line of the LCD.
- Dew Point (DP) / Wet Bulb (WB): Peze a T/DP or T2/WB button to cycle between these readings on the bottom line of the LCD.
Unit Selection (°C/°F)
Peze a ° C / ° F. bouton pou chanje ant inite tanperati Sèlsiyis ak Farennayt.
Done Kenbe Fonksyon
Peze a KENBE button to freeze the current readings on the display. Press KENBE again to release and resume live measurements.
MAX/MIN/Average Readings
The RH300 can record maximum, minimum, and average readings. To access these functions:
- Peze a RESET MN/MX Peze bouton an yon fwa pou montre valè maksimòm ki anrejistre yo.
- Press it again to display the minimum recorded values.
- Press it a third time to display the average recorded values.
- To clear the recorded MAX/MIN/Average values, press and hold the RESET MN/MX button until the display resets.
Auto Power Off
The device features a selectable Auto Power Off function to conserve battery life. Refer to the full manual for details on enabling or disabling this feature.
Antretyen
Netwayaj
Siye aparèy la ak yon mou, damp cloth. Do not use abrasive cleaners or solvents. Ensure the sensor area remains clean and free of dust or debris.
Depo
When not in use, store the RH300 in a cool, dry place. Always close the sensor cap to protect the humidity sensor from damage and contamination. Remove batteries if storing for extended periods to prevent leakage.
Kalibrasyon
The Extech RH300 is factory calibrated. For professional applications requiring periodic recalibration, contact Extech customer support or an authorized service center. Calibration kits (e.g., RH305) may be available for user calibration at specific humidity levels.
Depanaj
| Pwoblèm | Kòz posib | Solisyon |
|---|---|---|
| Aparèy pa limen. | Pil ki mouri oswa ki mal enstale. | Ranplase pil yo, asire w ke polarite a kòrèk. |
| Lekti ki pa kòrèk. | Sensor obstructed or contaminated; device not stabilized; extreme environmental conditions. | Clean sensor; allow device to acclimate to environment; avoid direct breath on sensor. |
| Display shows "OL" or "---". | Measurement range exceeded or sensor error. | Move to an environment within the specified operating range. If issue persists, contact support. |
Espesifikasyon
| Paramèt | Valè |
|---|---|
| Modèl | RH300 |
| Ranje imidite relatif | 10 a 90% RH |
| Ranje Tanperati lè a | -4 a 122 ° F (-20 a 50 ° C) |
| Dew Point Range | -90.4 a 122 ° F (-68.0 a 49.9 ° C) |
| Wet Bulb Range | -6.9 a 122 ° F (-21.6 a 49.9 ° C) |
| Pwovizyon pou pouvwa | 2 x AAA (1.5V) batteries |
| Dimansyon | 3.1 x 1.9 x 9 pous (7.9 x 4.8 x 22.9 cm) |
| Pwa | 0.704 ons (0.02 kg) |
| Peyi orijin | Lachin |
Figure 3: Extech RH300 with approximate dimensions indicated.
Enfòmasyon sou Garanti
The Extech RH300 Digital Psychrometer comes with a 1-ane garanti limite from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from misuse, abuse, accident, unauthorized alteration or repair, or acts of nature.
For warranty service, please retain your proof of purchase and contact Extech customer support.
Sipò pou Kliyan
For technical assistance, troubleshooting, or service inquiries, please visit the official Extech websit oswa kontakte ekip sipò kliyan yo.
- Extech Websit: www.extech.com
- Sipò sou entènèt: Refer to the support section on the Extech website for FAQs, downloads, and contact forms.
