3 in 1 Instrument: Gage, Switch, and Transmitter, Flame-Proof Enclosure
ATEX/IECEx Approved DH3 Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. Ideal for hazardous area pressure and flow.
Features
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3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
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Flame-proof enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to process pressure and set point status
Product Applications
Specifications
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Service: Air and non-combustible, compatible gases.
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Wetted Materials: Consult factory.
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Housing Material: Die cast aluminum case and bezel.
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Accuracy: < 5 in w.c. (except ±2.5 in w.c.): ±1%; All other ranges: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).
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Stability: < ±1% per year.
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Pressure Limits: Ranges ≤ 2.5 in w.c.: 25 psi; ±2.5", 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in w.c.: 9 psi.
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Temperature Limits: 32 to 140°F (0 to 60°C) (Note: Product temperature limits differ from case).
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Compensated Temperature Limits: 32 to 140°F (0 to 60°C).
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Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C).
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Power Requirements: 12 to 28 VDC, 12 to 28 VAC 50 to 400 Hz.
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Power Consumption: 3 VA max.
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Output Signal: 4 to 20 mA DC into 900 Ω max.
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Zero & Span Adjustments: Accessible via menus in safe zone only.
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Response Time: 250 ms (damping set to 1).
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Display: Backlit 4 digit LCD 0.4" height LED indicators for set point and alarm status.
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Electrical Wiring: Screw terminal.
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Mounting Orientation: Mount unit in vertical plane.
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Dial Size: 5" (127 mm) OD x 3-1/8" (79.38 mm).
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Enclosure Rating: (IP66). IP65 with option OPV, overpressure relief valve.
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Housing Material: Aluminum.
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Finishing: Texture epoxy coat RAL7038.
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Pressure Connections: 1/8" NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.
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Electrical Connections: Two 1/2" FNPT. Cable gland not included.
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Weight: 12.3 lb (5.6 kg).
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ATEX Certificate: BVI 14ATEX0072.
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Agency Approvals: ATEX Compliant CE 1370 Ex II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C=Tamb=+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db
SWITCH SPECIFICATIONS
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Switch Type: 2 SPDT relays.
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Electrical Rating: 1 A @ 30 VAC/VDC.
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Set Point Adjustment: Adjustable via keypad on face in safe zone only.
