DWYER INSTRUMENTS - DH3 Digihelic Differential Pressure Controller Digihelic Controller in Photohelic Gage, Square Root Output for Flow, a 3 in 1 instrument

SPECIFICATIONSService: Air and non-combustible, compatible gases.Wetted Materials: Consult factory.Housing Material: Die cast aluminum case and bezel.Accuracy: 5˝ w.c. (except ±2.5˝ w.c.) : ±1%; All other ranges: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).Stability: ±1% per year.Pressure Limits: Ranges ≤ 2.5˝ w.c.: 25 psi; ±2.5”, 5˝ w.c.: 5 psi; 10˝ w.c.: 5 psi; 25˝ w.c.: 5 psi; 50˝ w.c.: 5 psi; 100˝ w.c.: 9 psi.Temperature Limits: 32 to 140°F (0 to 60°C).Compensated Temperature Limits: 32 to 140°F (0 to 60°C).Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C).Power Requirements: 12-24 VAC/VDC.Power Consumption: 3 VA max.Output Signal: 4-20 mA DC into 900 ohms max.Zero & Span Adjustments: Accessible via menus.Response Time: 250 ms (dampening set to 1).Display: Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm status.Electrical Connections: 15 pin male high density D-Sub connection. 18˝ (46 cm) cable with10 conductors included.Process Connections: 1/8˝ female NPT. Side or back connections.Mounting Orientation: Mount unit in vertical plane.Size: 5˝ (127 mm) O.D. x 3-1/8˝ (79.38 mm).Agency Approvals: CE.SWITCH SPECIFICATIONSSwitch Type: 2 SPDT relays.Electrical Rating: 1 amp @ 30 VAC/VDC.Set Point Adjustment: Adjustable via keypad on face

APPLICATIONS

Dust collection bag filters

SCFM flow in ducts

Filter status

Static pressures in ducts or buildings

Damper control Fan control

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