Flow Transmitter

Product Details:

General description:
The transmitters of the 985V series are used to measure volumeflow, differential pressure, overpressure and vacuum. A jumperenables switching between volume flow and pressure measurement.

Applications:
Monitoring of gaseous, non-combustible and non-aggressivemedia.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.

Configuration of volume flow measurement:

• Select a calculation formula and enter a k-factor, both of whichare dependent on the type of ventilator or measuring probe.

• Or create a reference volume flow, which is entered directly.A menu guide on the device is available for all settings.

Output signal selection:
The output signal can be changed between 0 - 10 Volt and 4 - 20 mA by removing a jumper.

Switching output:
To give a switch signal at an user defined pressure level thetransmitter has an adjustable transistor switching output(npn NO) with a maximum switching capacity of 30 Vdc/100 mA.(npn NC or pnp NO / NC on request).

Configurable response time:
The response time of the output signal can be configured usinga jumper. If the jumper is in place the response time is slow(factory setting), which is useful for suppressing brief pressurepeaks. If the application requires a fast response time thejumper must be removed.

Easy offset calibration:
Press the left button to adjust the output signal to zero in anunpressurized state. A version with automatic zero-point adjustmentis available as an option.

Mounting position:
Can be mounted in any position. The zero offset calibration eliminates any possible position error. 

Product Details:

Multifunctional air flow meter for building automation systems where electricity is not available
The DPT-Flow-Batt series air flow transmitters are engineered for building automation in the HVAC/R industry. The most technologically advanced transmitters on the market, measuring volume flow, velocity, and static and differential pressure. The DPT-Flow-Batt series devices can be connected directly to the pressure measurement points in a centrifugal fan, providing accurate flow measurement of the fan. The smart user interface enables easy selection of settings according to the selected fan or in-duct measurement probe.

DPT-Flow-Batt series devices include:

• Two field selectable functions:
• Measure in-duct volume flow, velocity or differential pressure
• Measure airflow across centrifugal fans
• Multiple field selectable measurement units:
• Volume flow: m3/s, m3/h, cfm, l/s
• Velocity: m/s, ft/min o Pressure: Pa, inWC, mmWC, kPa, mbar

DPT-Flow-Batt series devices are commonly used in HVAC/R systems for:

• Air flow monitoring across centrifugal fans and blowers
• In-duct air flow monitoring

Technical details: