MeterMall USA - Pressure Meters / Differential Pressure Controllers and Switches / All Products

DH Dwyer Digihelic Differential Pressure Controller

Wed, 10 Apr 2013 20:19:00 GMT

DH Dwyer Digihelic Differential Pressure Controller
Buy Now: $595.00

Dwyer DH Digital Differential Pressure Controller User Manual

Dwyer DH Digital Differential Pressure Controller Dimensila Drawing

The Series DH Digihelic® Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. Combining these 3 features allows the reduction of several instruments with oneproduct, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 0.5% full scale accuracy on ranges from 0.25 to 100 in. w.c. Bi-directional ranges are also available, but without velocity and volumetric flow.

The Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units.Two SPDT control relays with adjustable dead bands are provided along with a scalable 4-20 mA process output. In velocity of flow modes, asquare root output is provided on the 4-20 mA signal to coincide with the actual flow curve. The Series DH provides extreme flexibility inpower usage by allowing 120/220 VAC and also 24 VDC power which is often used in control panels.

Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area inflow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process readings; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your application's range; Modbus® communications; and field calibration.

With all this packed into one product it is easy to see why the Digihelic® controller is the only instrument you will need for all yourpressure applications.

DH Digital Differental Pressure Controller Specifications

     Service: Air and non-combustible, non-conducting compatible gases.
      Wetted Materials: Consult Factory.
      Housing Material: ABS plastic, UL approved 94-V-0.
      Accuracy: ±0.5% at 77°F (25°C) including hysteresis and repeatability.
      Stability: < ±1% per year.
      Pressure Limits: Ranges =2.5" w.c. = 2 psi; 5": 5 psi; 10": 5 psi;
          25": 5 psi; 50": 5 psi; 100": 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: High Voltage Power = 100 to 240 VAC, 50 to 400 Hz or
          132 to 240 VDC. Low Voltage Power = 24 VAC ±20%.
      Power Consumption: Low Voltage Power = 24 VDC - 130 mA max.
          High Voltage Power = 100 to 240 VAC, 132 to 240 VDC - 7VA max.
      Output Signal: 4-20 mA DC into 900 ohms max.
      Zero & Span Adjustments: Accessible via menus.
      Response Time: 250 ms.
      Display: 4 digit LCD 0.4" height. LED indicators for set point and alarm status.
      Electrical Connections: Screw terminals.
      Process Connections: Compression fitting for use with 3/16" OD x 1/8" ID tubing.
      Enclosure Rating: Face designed to meet NEMA 4X (IP66).
      Mounting Orientation: Mount unit in horizontal plane.
      Size: 1/8 DIN.
      Panel Cutout: 1.772 x 3.620" (45 x 92 mm).
      Weight: 14.4 oz (408 g).
      Serial Communications: Modbus® RTU, RS485, 9600 Baud.
      Agency Approvals: CE, UL

DH Applications

• SCFM Flow in Ducts

• Air Flow for Industrial Ovens

• Filter Status

• Clean Room Pressure

• Fume Hood Air Flow

• Medical Room Pressures

• Static Pressures in Ducts or Buildings

• Damper Control

• Fan Control

See also DH3 Digihelic Differential Pressure Controller
DHII Digihelic Differential Pressure Controller, NEMA 4X

Order accessories below:

Visit Differential Pressure Controllers and Switches to see additional products in this category.

DHII Dwyer Digihelic Differential Pressure Controller

Wed, 10 Apr 2013 15:45:00 GMT

DHII Dwyer Digihelic Differential Pressure Controller
Buy Now: $1,550.00

Dwyer DHII Differental Pressure Controller User Manual

Dwyer DHII Differential Pressure Controller Dimensional Drawing

The Digihelic® Controller just got better with the New Series DHII Differential Pressure Controller. The DHII takes all the fabulous features of the standard Digihelic®Pressure Controller and packages them in a robust NEMA 4 (IP66) housing.

The Digihelic® II Pressure Controller combines the 2 SPDT control relays, 4-20 mA process output and Modbus® communications with a large, brightly backlit 4 digit LCD display that can easily be seen from long distances. The electrical wiring has alsobeen enhanced in the DHII with its detachable terminal blocks. Theremovable terminals allow the install to easily wire the terminal blockoutside the housing and then attach to the circuit board, reducingwiring difficulties and installation time on the process.

The Digihelic® II Differential Pressure Control in the new NEMA 4 (IP66) enclosure enables this product to be the perfect choice when mountingpressure controls outdoors in such applications as rooftop air handlers. This housing also makes it the ideal solution for surface mounting inclean rooms or facilities where water or a cleaning solution is utilized in maintaining plant cleanliness.

DHII Specifications

     Service: Air and non-combustible, compatible gases.
     Wetted Materials: Consult Factory.
     Housing Material: Aluminum, glass.
     Accuracy: ±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 in. w.c. = 2 psi; 5": 5 psi; 10": 5 psi; 25": 5 psi; 25": 5 psi;
          50": 5 psi; 100": 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: High Voltage Power = 100 to 240 VAC, 50 to 400 Hz or
          132 to 240 VDC. Low Voltage Power = 24 VDC ±20%.
     Power Consumption: Low Voltage Power = 24 VDC - 130 mA max.
          High Voltage Power = 100 to 240 VAC, 132 to 240 VDC - 7VA 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: 4 digit backlit LCD 0.6" height. LED indicators for set point and
          alarm status.
     Electrical Connections: Euro type removable terminals blocks with watertight
          conduit fittings for 1/2" watertight conduit.
      Process Connections: 1/8" female NPT.
     Enclosure Rating: Designed to meet NEMA 4X (IP66).
     Mounting Orientation: Mount unit in horizontal plane.
     Size: 4.73" x 4.73" x 3.43" (120 x 120 x 87.1 mm).
     Weight: 2 lb 10 oz (1.19 kg).
     Serial Communications: Modbus® RTU, RS485, 9600 Baud.
     Agency Approvals: CE and UL.

Switch Specifications
     Switch Type: 2 SPDT relays.
     Electrical Rating: 8 Amps at 240 VAC resistiv

DHII Applications

• Air handlers

• Clean rooms

See also DH Digihelic Differential Pressure Controller
DH3 Digihelic Differential Pressure Controller, NEMA 4X

Order accessories below:

Visit Differential Pressure Controllers and Switches to see additional products in this category.

DH3 Dwyer Digihelic Differential Pressure Controller

Wed, 10 Apr 2013 11:52:00 GMT

DH3 Dwyer Digihelic Differential Pressure Controller
Buy Now:

Dwyer DH3 Digital Differential Pressure Controller User Manual

Dwyer DH3 Digital Differential Pressure Controller Dimensila Drawing

The 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 featuresallows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications,achieving a 1% full scale accuracy on ranges down to the extremely low0.25" 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.

The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly usedengineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.

Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area inflow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manualalarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mAprocess output to fit your applications range and field calibration.

DH3 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 = 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.: 9psi.
     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: 12-24 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 (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 highdensity 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) O.D. 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 amp @ 30 VAC/VDC.
     Set Point Adjustment: Adjustable via keypad on face

DH3 Applications

• SCFM flow in ducts

• Filter status

• Static pressures in ducts or buildings

• Damper control

• Fan control

See also DH Digihelic Differential Pressure Controller
DHII Digihelic Differential Pressure Controller, NEMA 4X

Order accessories below:

Visit Differential Pressure Controllers and Switches to see additional products in this category.