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Series DH3 Digihelic® Differential Pressure Controller

DH3The Series 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 Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1% 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.

The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering 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 in flow 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 reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration.

PRODUCT SPECIFICATIONS
Service: 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: 12-28 VDC, 12-28 VAC 50-400 Hz.
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 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) 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.
ACCESSORIES:
  • A-298 - Flat aluminum bracket for flush mounting Capsuhelic® gage, 603A, 605, and 3000MR.
  • A-370 - Mounting bracket, flush mount Capsuhelic® gage or Series 600 Transmitter in bracket. Bracket is then surface mounted. Steel with gray hammertone epoxy finish.
  • A-465 - Flush mount space pressure sensor.
  • A-301 - Static pressure tip, for 1/4" metal tubing connection.
  • A-302 - Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing.
  • A-303 - Portable static pressure tip, for 3/16" ID rubber or plastic tubing with 4" insertion.
  • A-414 - 316 SS clean room pressure sensor.
  • A-307 - Static pressure fitting, for 1/4" metal tubing connection.
  • A-308 - Static pressure fitting, for 3/16" and 1/8" ID plastic or rubber tubing.
  • A-417 - Static pressure pickup, for use in clean rooms, 100 micron filter picks up static pressure, stainless steel wall plate fits 2" x 4" electrical box, sealed with foam gasket, screws included. Barbed brass fitting holds 1/8" to 5/32" ID tubing.
  • A-418 - Static pressure pickup, room mount with Delta style plastic enclosure fits 2" x 4" electrical box, mesh screen hides static pressure pickup port, clean connection to 1/8" to 5/32" ID tubing and pressure sensor. Sealed with foam gasket, screws included.
  • A-419 - Static pressure pickup ceiling mount, plate rests on top of standard 3/4" thick ceiling tile while 100 micron filter faces down through 5/8" hole in tile, screws included for optional mounting to junction box, barbed fitting holds 1/8" to 5/32" ID tubing.
  • A-420 - Static pressure pickup for roof/outside mount, NEMA 4X (IP66) rated structure withstands harsh environmental elements, structure is 3-5/8" across and 2-1/2" deep, EMT conduit fitting is 1/2", pressure connection is brass barbed fitting for 1/4" tubing.
  • A-306-A - Outdoor static pressure sensor, provides average outdoor pressure signal for reference in building pressurization applications, includes sensor, 50 ft vinyl tubing, mounting bracket and hardware.
  • A-201 - Rubber tubing, 3/16" ID, 9 ft length.
  • A-202 - Rubber tubing, 3/16" ID, lengths to 50 ft, per ft.
  • A-203 - PVC tubing, 1/8" ID x 1/4" OD, per ft.
  • A-210 - Aluminum tubing, 1/4" OD, 5 ft length.
  • A-211 - Aluminum tubing, 1/4" OD, 50 ft length.
  • A-220 - Flexible vinyl tubing, clear 3/16" ID x 5/16" OD, lengths to 500 ft, per ft.
  • A-221 - Flexible vinyl tubing, clear 1/8" ID x 3/16" OD, lengths to 500 ft, per ft.
  • A-222 - Flexible vinyl tubing, clear .240" ID x .375" OD, lengths to 500 ft, per ft.
  • A-223 - Black polyethylene 1/8" ID 1/4" OD, 10 ft length, 200 psi maximum @ 140°F.
Standard Ranges
Model Number Description Usually Ships
DH3-002 Differential Pressure Controller, range 0-0.25" w.c. Same Day
DH3-003 Differential Pressure Controller, range 0-0.5" w.c. Same Day
DH3-004 Differential Pressure Controller, range 0-1" w.c. Same Day
DH3-005 Differential Pressure Controller, range 0-2.5" w.c. Same Day
DH3-006 Differential Pressure Controller, range 0-5" w.c. Same Day
DH3-007 Differential Pressure Controller, range 0-10" w.c. Same Day
DH3-009 Differential Pressure Controller, range 0-25" w.c. Same Day
DH3-010 Differential Pressure Controller, range 0-50" w.c. Same Day
DH3-011 Differential Pressure Controller, range 0-100" w.c. Same Day
Bi-Directional Ranges
Model Number Description Usually Ships
DH3-013 Differential Pressure Controller, range 0.25-0-0.25" w.c. Same Day
DH3-014 Differential Pressure Controller, range 0.5-0-0.5" w.c. Same Day
DH3-015 Differential Pressure Controller, range 1-0-1" w.c. Same Day
DH3-016 Differential Pressure Controller, range 2.5-0-2.5" w.c. Same Day
DH3-017 Differential Pressure Controller, range 5-0-5" w.c. Same Day
DH3-018 Differential Pressure Controller, range 10-0-10" w.c. Same Day
ACCESSORIES:
Model Number Description Usually Ships
A-298 Flat aluminum bracket for flush mounting Capsuhelic® gage, 603A, 605, and 3000MR. Same Day
A-370 Mounting bracket, flush mount Capsuhelic® gage or Series 600 Transmitter in bracket. Bracket is then surface mounted. Steel with gray hammertone epoxy finish. Same Day
A-465 Flush mount space pressure sensor. Same Day
A-301 Static pressure tip, for 1/4" metal tubing connection. Same Day
A-302 Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing. Same Day
A-303 Portable static pressure tip, for 3/16" ID rubber or plastic tubing with 4" insertion. Same Day
A-414 316 SS clean room pressure sensor. Same Day
A-307 Static pressure fitting, for 1/4" metal tubing connection. Same Day
A-308 Static pressure fitting, for 3/16" and 1/8" ID plastic or rubber tubing. Same Day
A-417 Static pressure pickup, for use in clean rooms, 100 micron filter picks up static pressure, stainless steel wall plate fits 2" x 4" electrical box, sealed with foam gasket, screws included. Barbed brass fitting holds 1/8" to 5/32" ID tubing. Same Day
A-418 Static pressure pickup, room mount with Delta style plastic enclosure fits 2" x 4" electrical box, mesh screen hides static pressure pickup port, clean connection to 1/8" to 5/32" ID tubing and pressure sensor. Sealed with foam gasket, screws included. Same Day
A-419 Static pressure pickup ceiling mount, plate rests on top of standard 3/4" thick ceiling tile while 100 micron filter faces down through 5/8" hole in tile, screws included for optional mounting to junction box, barbed fitting holds 1/8" to 5/32" ID tubing. Same Day
A-420 Static pressure pickup for roof/outside mount, NEMA 4X (IP66) rated structure withstands harsh environmental elements, structure is 3-5/8" across and 2-1/2" deep, EMT conduit fitting is 1/2", pressure connection is brass barbed fitting for 1/4" tubing. Same Day
A-306-A Outdoor static pressure sensor, provides average outdoor pressure signal for reference in building pressurization applications, includes sensor, 50 ft vinyl tubing, mounting bracket and hardware. Same Day
A-201 Rubber tubing, 3/16" ID, 9 ft length. Same Day
A-202 Rubber tubing, 3/16" ID, lengths to 50 ft, per ft. Same Day
A-203 PVC tubing, 1/8" ID x 1/4" OD, per ft. Same Day
A-210 Aluminum tubing, 1/4" OD, 5 ft length. Same Day
A-211 Aluminum tubing, 1/4" OD, 50 ft length. Same Day
A-220 Flexible vinyl tubing, clear 3/16" ID x 5/16" OD, lengths to 500 ft, per ft. Same Day
A-221 Flexible vinyl tubing, clear 1/8" ID x 3/16" OD, lengths to 500 ft, per ft. Same Day
A-222 Flexible vinyl tubing, clear .240" ID x .375" OD, lengths to 500 ft, per ft. Same Day
A-223 Black polyethylene 1/8" ID 1/4" OD, 10 ft length, 200 psi maximum @ 140°F. Same Day
 
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