Specifications(PDF) Series 477Handheld Digital Manometers arepacked with features you need to make low pressuremeasurement and recording faster, easier and moreaccurate than ever. First, you can instantly selectfrom up to nine of the most widely used pressure unitswithout having to waste time and risk mistakes withtedious conversions. Next, a non-volatile memoryfunction enables storage of up to 40 readings –perfect for HVAC technicians making Pitot tubetraverses of airflow readings across a duct. TheSeries 477 is FM approved intrinsically safe forhazardous locations, Class 1, Div. 1, Group A, B, C,D, T4. When working in poorlylighted areas, just switch on the handy backlightfeature. It automatically shuts itself off after 20minutes to minimize battery drain. Electronic zeroingmeans you simply touch a single key to perfectly nullout any minor pressure differences. A display HOLD keyfreezes the current pressure for those all-too-commonsituations where readings fluctuate. We even includedan audible alarm to warn you of overpressure plus avisual alarm also confirms a value has been stored,eliminating the need to observe display during a ducttraverse. A new option for theSeries 477 is a USB interface. Combined with the 477’sdatalogging capability, a user can now quickly andconveniently download the stored readings to any USBcompatible device. Data manipulation can be easilyaccomplished in a multitude of word processing orspreadsheet programs. USB models come with a USB cableand a software CD.
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Service:Air and compatible gases. FM models: air and compatiblecombustible gases.Wetted Materials:Consult Factory.Accuracy:±0.5% F.S., 60 to 78°F (15.6 to 25.6°C); ±1.5% F.S. from 32 to60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C).Pressure Hysteresis:±0.1% of full scale.Pressure Limits:See Ordering page.Temperature Limits:0 to 140°F (-17.8 to 60°C).Compensated TemperatureLimits: 32 to 104°F (0 to 40°C).Storage Temperature Limits:-4 to 176°F (-20 to 80°C).Display:0.42″ (10.6 mm) 4-digit LCD.Response Time:1 second.Resolution:See Ordering page.Power Requirements:9 volt alkaline battery. Battery included but not connected.Weight:10.2 oz (289 g).Connections:Two barbed connections for use with 1/8″ (3.18 mm) or3/16″ (4.76 mm) I.D. tubing. Two compression fittings for usewith 1/8″ (3.18 mm) I.D. x 1/4″ (6.35 mm) O.D. tubingfor 477-7-FM & 477-8-FM only.Agency Approvals:CE and FM, USB models are not FM approved intrinsically safe.
| New Low Pressure Ranges. New USB Option Comes with Cable and Software for Easy Data Downloading. Instant Selection from up to Nine English/Metric Units. Stores 40 Readings in Memory for Later Reference. Measures Positive, Negative or Differential Pressures. Large Easy-to-Read 0.4″ LCD Display Includes Switchable Backlight for Great Visibility – Anywhere! Both Audible and Visual Overpressure Alarms. Includes + and – Indicators plus Low Battery Warning. Operates up to 100 Hours on a Single 9 Volt Battery. All models include an NIST calibration certificate. |
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| Field calibration. Monitoring or trouble shooting HVAC systems. Clean room checks. Air velocity monitoring with Dwyer Pitot tube. Natural gas appliance line pressure. |








