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Series-DH
Multifunction Differential Pressure Controller, 0.5% Accuracy, Digital Display
- 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
- Modbus® communications supports Process and HVAC system integration and control
Product Overview
- Accuracy Note ± 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
- 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
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.
NIST CALIBRATION available in Product Configurator.
Product Applications
- SCFM duct flow
- Industrial ovens air flow
- Filter status
- Clean room pressurization
- Fume hood air flow
- Surgical and medical room pressurization
- Damper and fan control
PDFs & Manuals