|Power Supply||18 - 30 VAC and VDC|
|Application||Building automation and air conditioning systems,Dynamic filter and ventilator monitoring|
|Operating Temperature||0 - 50 Deg C|
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.
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.
Can be mounted in any position. The zero offset calibration eliminates any possible position error.