DWYER DH3 Digihelic Differential Pressure Controller

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Description

Series DH3 Digihelic® Differential Pressure Controller,3 in 1 Instrument: Gage, Switch and Transmitter, Square Root Output for Flow

 

DWYER DH3 Digihelic Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The DWYER DH3 Digihelic Differential Pressure Controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1.5% full scale accuracy on ranges down to the extremely low 0.25″ w.c. to 2.5″ w.c. full scale. Ranges of 5″ w.c. and greater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.

 

Specifications

  • Service: Air and non-combustible, compatible gases.
  • Wetted Materials: Consult factory.
  • Housing Material: Die cast aluminum case and bezel.
  • Accuracy: ±1.5% for 0.25″ and ±0.25″ w.c. ranges. Ranges 0.5″ to 5″ w.c. and corresponding bi-directional (except ±2.5″ w.c.) ±1%; All other ranges: ±0.5% @ 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).
  • Stability: < ±1% per year.
  • Pressure Limits: Ranges (uni- and corresponding bidirectional), ≤ 1 in w.c.: 9 psi; 2.5 and 5 in w.c.: 1.5 psi; 10 in w.c.: 3 psi; 25 in w.c.: 8 psi; 50 in w.c.: 15 psi; 100 in w.c.: 20 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). For 0.25″ and ±0.25″ w.c. ranges: ±0.03%/°F (±0.054%/°C).
  • Power Requirements: 12 to 28 VDC, 12 to 28 VAC 50 to 400 Hz.
  • Power Consumption: 3 VA max.
  • Output Signal: 4 to 20 mA DC into 900 Ω max.
  • Zero & Span Adjustments: Accessible via menus.
  • Response Time: 250 ms (damping 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 with 10 conductors included.
  • Process Connections: 1/8″ female NPT. Side or back connections.
  • Mounting Orientation: Mount unit in vertical plane.
  • Size: 5″ (127 mm) OD x 3-1/8″ (79.38 mm).
  • Weight: 1.75 lb (794 g).
  • Agency Approvals: CE.
  • SWITCH SPECIFICATIONS
  • Switch Type: 2 SPDT relays.
  • Electrical Rating: 1 A @ 30 VAC/VDC.
  • Set Point Adjustment: Adjustable via keypad on face.

 

Features

  • 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
  • Full scale accuracy of 1.5% even on extremely low ranges, and 0.5% for ranges above 5 in w.c. provide for greater measurement precision
  • Secure menu program provides access to device operation only for the right skill level

 

Models & Ordering

 

Standard Ranges

Model Description
DH3-002 Differential Pressure Controller, range 0-0.25″ w.c.
DH3-003 Differential Pressure Controller, range 0-0.5″ w.c.
DH3-004 Differential Pressure Controller, range 0-1″ w.c.
DH3-005 Differential Pressure Controller, range 0-2.5″ w.c.
DH3-006 Differential Pressure Controller, range 0-5″ w.c.
DH3-007 Differential Pressure Controller, range 0-10″ w.c.
DH3-009 Differential Pressure Controller, range 0-25″ w.c.
DH3-010 Differential Pressure Controller, range 0-50″ w.c.
DH3-011 Differential Pressure Controller, range 0-100″ w.c.

 

Bi-Directional Ranges

Model Description
DH3-013 Differential Pressure Controller, range 0.25-0-0.25″ w.c.
DH3-014 Differential Pressure Controller, range 0.5-0-0.5″ w.c.
DH3-015 Differential Pressure Controller, range 1-0-1″ w.c.
DH3-016 Differential Pressure Controller, range 2.5-0-2.5″ w.c.
DH3-017 Differential Pressure Controller, range 5-0-5″ w.c.
DH3-018 Differential Pressure Controller, range 10-0-10″ w.c.

 

 

Additional information

Model

DH3-002, DH3-003, DH3-004, DH3-005, DH3-006, DH3-007, DH3-009, DH3-010, DH3-011, DH3-013, DH3-014, DH3-015, DH3-016, DH3-017, DH3-018

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