DH3-007 | Differential Pressure Controller | range 0-10" w.c. | Dwyer (OBSOLETE)
Differential Pressure Controller, range 0-10" w.c.
Documents and manuals
Dwyer DH3-007 Documents
Overview
Details for DH3-007
Differential Pressure Controller | range 0-10" w.c.
Series DH3 Digihelic® Differential Pressure Controller
The 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 1.5% 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.
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.
Please see Series AT-DH3 for ATEX approved.
For additional ranges, see Series DHC Digihelic® Differential Pressure Controller.Product Applications
- SCFM flow in ducts
- Filter status
- Static pressures in ducts or buildings
- Damper control
- Fan control
Specifications
- Series
- DH3 Digihelic® Differential Pressure Controller
- Category/Type
- Pressure
- Type
- Differential Pressure
- Series
- DH3 Digihelic® Differential Pressure Controller
- 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. andcorresponding 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.: 15psi; 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 alarmstatus.
- 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.