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Dwyer DH3 Digihelic® Differential Pressure Controller

Dwyer DH3 Digihelic® Differential Pressure Controller

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SKU
DH3
Manufacturer:
Dwyer
Dwyer

Key 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% 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
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The DH3 controller is a perfect tool for pressure, velocity and flow applications. The DH3 ranges from 0.25" w.c. to 100" w.c. and it is also available in bi-directional ranges. Given a 4-20 mA process output the controller uses 2 SPDT control relays with adjustable deadbands. It is simple to access the 5 menus that gives you access to the security level; selection of pressure, velocity or flow operation, engineering units; and K-factor for use with flow sensors. See more info in the pdf datasheet.
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 in w.c.: 25 psi; ±2.5", 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.: 5 psi; 100 in 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). For 0.25" and ±0.25" w.c. ranges: ±0.03%/°F (±0.054%/°C).
Power Requirements:
12-28 VDC, 12-28 VAC 50 to 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. 4' and 10' cables available.
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 amp @ 30 VAC/VDC.
Set Point Adjustment:
Adjustable via keypad on face.

Data Sheet

Dwyer DH3 Data Sheet

Manuals

Dwyer DH3 User Manual

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