Česky (CZK)Digihelic® Differential Pressure Controller
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. More
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.
The model configurator above works with INWC pressure units (inch of water column, inH₂O). 1 INWC = 249.1 Pa, see table below.
| RANGES (conversion of INWC [inH₂O] to Pa/kPa) | ||
| INWC | Pa | kPa |
| 0,100 | 24,91 | |
| 0,250 | 62,27 | |
| 0,500 | 124,5 | 0,1245 |
| 1,000 | 249,1 | 0,2491 |
| 2,500 | 622,7 | 0,6227 |
| 5,000 | 1245 | 1,245 |
| 10,00 | 2491 | 2,491 |
| 25,00 | 6227 | 6,227 |
| 50,00 | 12,45 | |
| 100,0 | 24,91 | |
Note: in the device menu you can select the following display units - Pa, kPa, hPa, mBar, PSI, INWC, FTWC, MMWC, CMWC, INHG, MMHG, OZIN
SPECIFICATIONS:
Service: Air and non-combustible, compatible gases
Display: Backlit LCD display, LED setpoint indicators
Accuracy: ± 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
Response Time: 400 ms (damping set to 0)
Stability: <± 1% FSO/year
Set Point Adjustment: Menu Configurable
Switch: 2 SPDT relays, 1 A @ 30 VAC/VDC
Output: 4 to 20 mA; 0 to 10 V, 0 to 5 V, 1 to 5 V, 2 to 10 V
Process Connection: 1/8" female NPT ports on side and back
Data Interface: BACnet MS/TP, Modbus RTU
Enclosure Ratings: IP66, NEMA Type 4X
Supply Power: 12-28 VDC or 12-28 VAC 50 to 400 Hz
Size: 127 mm x 48 mm deep
Weight: 250 g
Complete informations can be found in the spec sheet (PDF), see the "Download" section.
Pressure Transducers and Transmitters
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The conversion of pressure into an electrical signal is achieved by the physical deformation of strain gages which are bonded into the diaphragm of the pressure transducer and wired into a wheatstone bridge configuration. Pressure applied to the transducer produces a deflection of the diaphragm which introduces strain to the gages. The strain will produce an electrical resistance change proportional to the pressure...
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