Differential Pressure Controller
The Series DH3 DigihelicÂ® Differential Pressure Controller is a 3 in 1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular PhotohelicÂ® gage style housing. Combining these 3 features allows the reduction of several
instruments with one product, saving inventory, installation time and money. The DigihelicÂ® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1% full scale accuracy on ranges down to the extremely low 0.25? w.c. to 2.5? w.c. full scale. Ranges of 5? w.c. andgreater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.
The Series DH3 DigihelicÂ® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.
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.