Dwyer Omega – Series DH Multifunction Differential Pressure Controller, 0.5% Accuracy, Digital Display
Product Code: Series DH
Manufacturer: Dwyer Omega
The Series DH Digihelic® Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 0.5% full scale accuracy on ranges from 0.25 to 100 in. w.c.
The Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. Two SPDT control relays with adjustable dead bands are provided along with a scalable 4-20 mA process output. In velocity of flow modes, a square root output is provided on the 4-20 mA signal to coincide with the actual flow curve. The Series DH provides extreme flexibility in power usage by allowing 120/220 VAC or 24 VDC power which is often used in control panels.
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 readings; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your application’s range; Modbus® communications; and field calibration. With all this packed into one product it is easy to see why the Digihelic® controller is the only instrument you will need for all your pressure applications.
Accuracy Detail
± 0.5% at 77°F (25°C) including hysteresis and repeatability.
Baud Rate
9600
Compensated Temperature, Max
140 °F
Compensated Temperature, Min
32 °F
Compliance
CE, UL
Data Interface
Modbus RTU, RS485
Display Note
4 digit LCD 0.4˝ height. LED indicators for set point and alarm status
Display Type
LCD
Electrical Connection
Screw Terminal
Enclosure Ratings
IP66, NEMA Type 4X
Height
3.62 in
Length
1.772 in
Materials
ABS
Materials, Wetted
Consult Factory
Media Compatibility
Air, Argon, Carbon dioxide, Helium, Nitrogen, Non-Corrosive Dry Gases
Mounting
1/8 DIN
Mounting Orientation
Horizontal
Number of Digits
4
Operating Temperature, Max
140 °F
Operating Temperature, Min
32 °F
Output Detail
4-20 mA DC into 900 Ω max
Output Signal
Current
Power Consumption
7 VA, Low Power: 130 mA
Measurement Pressure Type
Differential
Process Connection Note
Compression fitting for use with 1/8˝ ID X 1/4˝ OD tubing (3.175 mm ID x 6.35 mm OD). Optional barbed fitting for 3/16˝ ID tubing
Process Connection Size
1/8 in
Process Connection Type
Compression Fitting
Response Time
250 ms
Set Point Adjustment
Menu Configurable
Stability
<± 1%/year
Supply Power Note
High voltage power = 100-240 VAC, 50-400 Hz or 132-240 VDC, Low voltage power = 24 VDC ± 20%.
Supply Power Type
AC/DC
Supply Voltage
100 to 240 Vac/132 to 240 Vdc
Switch Note
8 A at 240 VAC resistive
Switch Rating
8 A @ 240 Vac
Switch Type(2)
SPDT
Thermal Effects
0.020%/°F @ 77°F
Weight
14.4 oz
Zero Setting Adjustable Range
Accessible via Menus
- 3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
- Velocity of flow modes, a square root output coincides with the actual flow curve for greater precision
- Power usage of 120/220 VAC or 24 VDC provides flexibility to incorporate device in control panel
- Secure menu program provides access to device operation only for the right skill level
