Dwyer Omega – Series DHC Digihelic® Differential Pressure Controller, 4-20 mA Output, 1.5% Accuracy
Product Code: Series DHC
Manufacturer: Dwyer Omega
The Series DHC Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with both current and voltage outputs. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time, and cost. The Series DHC Digihelic® differential pressure controller is the ideal instrument for pressure, velocity, and volumetric flow applications reading in several commonly used engineering units with optional unidirectional or bidirectional ranges. These units achieve a 1.5% or better accuracy on extremely low ranges, and 0.5% accuracy for ranges at or above 1 in w.c. Calibration can be performed in the field, making maintaining its accuracy more manageable. Additionally, the Series DHC Digihelic® differential pressure controller includes 2 SPDT control relays with adjustable deadbands. Programming the unit is simple using the built-in menu. With scalable 4-20 mA, selectable voltage process outputs, and selectable Modbus® or BACnet communication, this controller can easily fit into your application.
Accuracy Detail
± 0.5% FSO for all ranges, except 0.5 in w.c. @ ± 1% FSO, and ranges at or below ± 0.25 in w.c. @ ± 1.5% FSO
Applications
Fluid Measurement and Control
Baud Rate
9600 to 115200
Burst Pressure
6 psi Maximum
Compliance
BTL, CE
Data Interface
BACnet MS/TP, Modbus RTU
Device Load
1/8 Unit
Display Note
Backlit LCD display, LED setpoint indicators
Display Type
LCD
Electrical Connection
Sub-D Male Miniature Connector
Enclosure Ratings
IP66, NEMA Type 4X
Height
1.9 in
Materials
Polycarbonate
Materials, Wetted
Consult Factory
Media Compatibility
Air, Argon, Carbon dioxide, Helium, Nitrogen, Non-Corrosive Dry Gases
Mounting Orientation
None
Number of Wires
4
Operating Temperature, Max
158 °F
Operating Temperature, Min
-4 °F
Outer Diameter
5 in
Output Detail
4 to 20 mA; 0 to 10 V, 0 to 5 V, 1 to 5 V, 2 to 10 V
Output Signal
Current, Voltage
Power Consumption
3 VA
Measurement Pressure Type
Differential
Process Connection Note
1/8″ female NPT ports on side and back
Process Connection Size
1/8 in
Process Connection Type
NPT Female
Response Time
400 ms
Response Time Note
400 ms (damping set to 0)
Set Point Adjustment
Menu Configurable
Stability
<± 1% FSO/year
Supply Power Note
12-28 VDC or 12-28 VAC 50 to 400 Hz
Supply Power Type
AC/DC
Supply Voltage
12 to 28 Vac/Vdc
Switch Note
2 SPDT relays, 1 A @ 30 VAC/VDC
Switch Rating
1 A @ 30 Vac/Vdc
Switch Type(2)
SPDT
Thermal Effects
0.02% FS/°F
Weight
8.8 oz
Zero Setting Adjustable Range
Accessible via Menus
- One instrument saves inventory, installation time, and money with its measurement versatility and innovative 3-in-1 design
- Measurement precision via full-scale accuracy of 1.5% or better on extremely low ranges, and 0.5% for ranges at or above 1 in w.c.
- Safe and secure with security menu programming
- Simplified field upgrade to DHC pressure controller with optional stainless steel bezel
