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Temperature Transmitter Application
Process industry Industrial furnace construction and the thermal industry Plant construction and mechanical engineering Food industry Pharmaceutical industry Cooling systems Heating and air conditioning Plastics industry Renewable energy Water and wastewater
Pressure Transmitter Applications
Monitoring of gaseous, non-aggressive media. Possible usage areas are: • Building automation and air conditioning systems • Overpressure measurement in clean rooms and laboratories • Measurement of constant pressure in VAV applications • Dynamic filter and ventilator monitoring.
Occupancy Sensor Applications
Education, Healthcare, Hospitality, Industrial, Retail

Series DPI Differential Pressure Controller

Series DPI electronic pressure measuring devices are engineered for building automation in HVAC/R industry. The most technologically advanced and versatile electronic differential pressure switch combining up to two relay outputs and 0-10V output options.

Optional Auto-Zero feature which electronically adjusts the transmitter zero at predetermined time intervals (every 10 minutes). The AZ adjustment takes
4 seconds. The AZ calibration eliminates all output signal drift due to thermal, electronic or mechanical effects.

Product Application:

  • Fan, Blower and Filter monitoring
  • Staircase pressure monitoring and alarm
  • Pressure monitoring in cleanrooms
  • Boiler pressure monitoring and alarm

AZ-calibration is a function in the form of an automatic zeroing circuit built into the PCB board. The AZ-calibration electronically adjusts the transmitter zero at predetermined time intervals (every 10 minutes). The AZ-calibration eliminates all output signal drift due to thermal, electronic or mechanical effects, as well as the need for technicians to remove high and low pressure tubes when performing initial or periodic transmitter zero point calibration.

The AZ adjustment takes 4 seconds. To avoid conflict with the BAS system, the output and display values will freeze to the latest measured value, after which the device returns to its normal measuring mode. Transmitters equipped with the AZ-calibration are virtually maintenance free.

When the AZ-calibration option is not selected, the product is provided with a manual pushbutton autozero. To maintain proper functionality and accuracy of the transmitter, it is recommended that the manual pushbutton autozero point calibration is performed annually, at a minimum.

  • Service: Dry air or non-aggressive gases
  • Measuring units: PA, kPA, MM WC, IN. WC, mBar selectable via menu Measuring element: Piezo resistive Operating Temperature:
  • Without autozero: -10...50 °C With autozero: -5...50 °C Storage temperature: -20...70 °C Humidity: 0 to 95 % RH, non-condensing Accuracy: ±0.5 % F.S.
  • Long term stability: Typical 1 year With autozero: ±1 Pa Without autozero: ±8 Pa Overpressure:
  • Proof pressure: 25 kPA Burst pressure: 30 kPA
  • Zero point calibration: Automatic with autozero (-AZ) circuit or Manual via menu
  • Response time: 0.5/10 s, selectable via menu Dimensions: 89 x 86.5 x 37.1 mm Weight: 150 g Materials: ABS Protection standard: IP54
  • Touch sensitive buttons on the lid: Menu, Back, OK, down arrow, up arrow
  • Display: 3 1/2 digit LCD backlit display Size: 46.0 W x 14.5 H mm Electrical connections:
  • V out: Terminal block (24 V, GND, 0-10 V)
  • Wire: 12-24 AWG (0.2-1.5 mm2)
  • Relay 1: Terminal block (NC, COM, NO)
  • Wire: 12-24 AWG (0.2-1.5 mm2)
  • Relay 2: Terminal block (NC, COM, NO)
  • Wire: 12-24 AWG (0.2-1.5 mm2)
  • Cable entries:
  • Strain relief: M16 & M20 Knockout: 16 mm Knockout: 20 mm
  • Pressure fittings: 5.2 mm barbed brass Circuit: 3-wire (24 V, GND, 0-10 V)
  • Input:
    • Without autozero: 21-35 VDC/ 24 VAC, ±10 %
    • With autozero: 24 VAC or VDC, ±10 %
  • Output:
    • Analog: 0-10 VDC, Relay 1: 250 VAC / 30 VDC / 6 A Relay 2: 250 VAC / 30 VDC / 6 A Resistance minimum: 1 kQ
    • Current consumption: 35 mA + relays (7 mA each) + AZ circuit (20 mA)

Add -AZ for models with Auto-Zero Feature. + 0^0 v output (10 mA)

For E.g.: DPI2500-2R-AZ-D Conformance: Meets requirements for CE marking

Model Selection Table:

Model

Field Selectable Measuring Range using menu

DPI2500-2R-D

100 / 250 / 1000 / 2500 PA

DPIC500-2R-D

±100 Pa / ±250 / ±300 / ±500 PA