Description
Series: DH3 Digihelic
Model: DH3-002
Brand: Dwyer, USA
Description:
- Differential Pressure Controller, range 0-0.25″ w.c.
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.
Product Applications:
- SCFM flow in ducts
- Filter status
- Static pressures in ducts or buildings
- Damper control
- Fan control
