1. Giriş
The Dwyer 475-1-FM Handheld Digital Manometer is designed for fast, accurate positive, negative, and differential pressure measurements. This device is suitable for use with air and compatible combustible gases. Its robust design and intrinsic safety features make it ideal for various industrial and scientific applications, including HVAC system monitoring, clean rooms, fume hoods, and isolation cabinets.
2. Güvenlik Bilgileri
2.1 Intrinsically Safe Operation
The Dwyer 475 Series Manometer is FM-approved intrinsically safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations. Adhere to all local and national safety regulations when operating in such environments.
2.2 Gas Compatibility
This manometer is compatible with air and compatible combustible gases. Do not use with incompatible or corrosive gases, as this may damage the instrument and pose a safety risk. Always verify gas compatibility before connecting the manometer.
2.3 Genel Önlemler
- Ensure the manometer is in good working condition before each use.
- Cihazınızı düşürmekten veya sert darbelere maruz bırakmaktan kaçınınız.
- Do not attempt to open or repair the unit yourself, as this may void the warranty and compromise intrinsic safety.
- Cihazınızı aşırı sıcaklıklardan ve nemden uzak tutunuz.
3. Paket İçeriği
Aşağıda listelenen tüm öğelerin paketinizde mevcut olduğundan emin olun:
- Dwyer 475-1-FM Handheld Digital Manometer
- Rubber Latex Tubing (3/16 inch ID, 9 foot length)
- bilek İpi
- 9V Alkalin Pil
- Çalıştırma Talimatları (bu kılavuz)

Image: The Dwyer 475-1-FM Digital Manometer shown alongside the included rubber latex tubing. The manometer features a digital display and control buttons for ON/OFF, ZERO, and UNITS.
4. Kurulum
4.1 Pil Kurulumu
- Locate the battery compartment cover on the back of the manometer.
- Kapağı çıkarın.
- Insert the supplied 9V alkaline battery, ensuring correct polarity.
- Pil bölmesi kapağını güvenli bir şekilde yerine takın.
4.2 Boru Bağlantısı
The manometer features two barbed connections for tubing. These connections accept 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing.
- For positive pressure, connect the tubing from the pressure source to the positive (+) port.
- For negative pressure (vacuum), connect the tubing from the vacuum source to the negative (-) port.
- For differential pressure, connect the higher pressure source to the positive (+) port and the lower pressure source to the negative (-) port.
- Ensure tubing connections are snug to prevent leaks.
5. Kullanım Talimatları
5.1 Açma/Kapatma
- Basın AÇIK/KAPALI Cihazı açmak için düğmeye basın.
- Basın AÇIK/KAPALI button again to power off the device.
5.2 Auto Zero Function
Ölçüm yapmadan önce, doğruluğu sağlamak için aleti sıfırlamak çok önemlidir.
- Ensure both pressure ports are open to atmospheric pressure (disconnected from any pressure source).
- Basın SIFIR button. The display will show '0.00' or a similar indication, confirming the zeroing process.
5.3 Pressure Unit Selection
The manometer allows selection between U.S. and metric pressure units.
- Basın BİRİMLER button to cycle through available pressure units (e.g., in. w.c., kPa).
- Ölçümünüz için istediğiniz birimi seçin.
5.4 Ölçüm Alma
- Perform the Auto Zero function as described in Section 5.2.
- Connect the tubing to the appropriate pressure source(s) as described in Section 4.2.
- The large LCD will display the pressure reading in the selected units.
- The manometer can display positive, negative, or differential pressures.
6. Bakım
6.1 Temizlik
Manometrenin dış yüzeyini yumuşak bir bezle silin.amp Kumaşı kullanmayın. Aşındırıcı temizleyiciler veya çözücüler kullanmayın, çünkü bunlar kumaşa zarar verebilir.asing veya göster.
6.2 Pil Değişimi
When the battery indicator appears on the display, replace the 9V alkaline battery following the steps in Section 4.1. A fresh battery provides up to 100 hours of operation.
6.3 Depolama
Store the manometer in a dry, cool place, away from direct sunlight and extreme temperatures. Disconnect tubing and remove the battery if storing for extended periods to prevent leakage.
7. Sorun Giderme
| Sorun | Olası Neden | Çözüm |
|---|---|---|
| Açıldığında görüntü yok | Pil bitmiş veya yanlış takılmış | Pil kutuplarını kontrol edin veya yeni bir 9V pil ile değiştirin. |
| Yanlış okumalar | Not zeroed correctly; Tubing leaks; Sensor issue | Perform Auto Zero function. Check tubing for kinks or leaks. If problem persists, contact support. |
| Display shows 'OVER' or 'UNDER' | Pressure exceeds or is below measurement range | Ensure the applied pressure is within the 0-20.00" w.c. range. |
8. Özellikler
- Çift Aralık: 0-20.00" w.c. (4.982 kPa)
- Kesinlik:
- ±0.5% Full Scale, 60 to 78°F (15.6 to 25.6°C)
- ±1.5% Full Scale, 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C)
- Basınç Histerisi: Tam Ölçeğin ±0.1%'ü
- Sıcaklık Sınırları: 0 ila 140°F (-17.8 ila 60°C)
- Telafi Edilen Sıcaklık Limitleri: 32 ila 104°F (0 ila 40°C)
- Depolama Sıcaklığı Limitleri: -4 ila 176°F (-20 ila 80°C)
- Görüntülemek: 0.42" (10.6 mm) 4-digit LCD
- Güç Gereksinimleri: 9V alkaline battery (user replaceable)
- Ağırlık: 10.8 oz. (306 gr)
- Proses Bağlantıları: Two barbed connections for 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing
- Hizmet: Air and compatible combustible gases
- Ajans Onayları: CE, FM (Intrinsically Safe for Class 1, Div. 1, Group A, B, C, D, T4 hazardous locations)
- Boyutlar: 6.5 x 3.5 x 0.75 inç
- Malzeme: Latex, Rubber (for tubing)
9. Garanti ve Destek
9.1 Garanti Bilgileri
Dwyer Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of one year from the date of purchase. For full warranty details and conditions, please refer to the official Dwyer Instruments website veya müşteri desteği ile iletişime geçin.
9.2 Teknik Destek
For technical assistance, troubleshooting beyond this manual, or to inquire about repairs, please contact Dwyer Instruments customer service. Contact information can typically be found on the manufacturer's official websitede veya ürün ambalajında yer almamaktadır.