Multifunctional differential pressure transmitters with air flow measurement and Modbus communication
DPT-MOD is a multifunctional transmitter for measuring volume flow, velocity, and static and differential pressure. The measurements can be read and the configuration done via Modbus communication. DPT-MOD requires less wiring than the traditional 3-wire transmitters because multiple devices can be connected on serial line. DPT-MOD can also be used with several different measurement probes such as FloXact™ or pitot tube, and air dampers.
DPT-MOD series devices include:
• Two selectable functions:
o Measure and monitor in-duct volume flow, velocity or
differential pressure
o Measure and monitor air flow across centrifugal fans
• Multiple selectable measurement units:
o Volume flow: m3/s, m3/h, cfm, l/s
o Velocity: m/s, ft/min
o Pressure: Pa, inWC, mmWC, kPa, mbar
• Modbus communication protocol
DPT-MOD series device options offer:
• AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy
Technical details
| Communication: | RS-485 Modbus (RTU) |
| Accuracy (from applied pressure): (model 2500) |
Pressure < 125 Pa = 1 % + ±2 Pa Pressure > 125 Pa = 1 % + ±1 Pa |
| Accuracy (from applied pressure): (model 7000) |
Pressure < 125 Pa = 1.5 % + ±2 Pa Pressure > 125 Pa = 1.5 % + ±1 Pa |
| Zero point calibration: | automatic with autozero element (-AZ), by pushbutton or via Modbus |
| Measuring units: | Pressure: Pa, kPa, mbar, inchWC, mmWC, psi Flow: m3/s, m3/hr, cfm, l/s, m/s, ft/min |
| Measuring element: | MEMS, no flow-through |
| Supply voltage: | 24 VAC ±10 % / 24 VDC ±10 % |
| Power consumption: | < 1.0 W |
| Output signal: | via Modbus |
| Response time: | 1.0−20 s, selectable via menu or via Modbus |
| Operating temperature: | -20…+50 °C (with autozero calibration -5...+50 °C) |
| -40C model: -40…+50 °C | |
| Protection standard: | IP54 |