PTH is a series of electronic pressure transmitters designed primarily to measure total and differential air pressures in ventilation systems. The resulting measurements are used for monitoring, control and regulation purposesm via a regulator, PLC or monitoring system. Typical applications include:
– The maintenance/control of constant pressure
at a given position within the duct system.
– The maintenance/control of desired
underpressure within the duct system.
– The measurement of pressure differentials
across filters to determine optimum filter
replacement time.
– Flow determination via differential pressure
measurements across a standard aperture
FUNCTION
PTH is a pressure transmitter for comfort ventilation systems. It provides an active current or voltage signal proportional to the measured air pressure. PTH consists of semiconductor elements. There is no air throughput and the unit is thus protected against dust in the ventilation system. The pressure element is temperature compensated to provide accurate pressure measurement throughout the specified temperature range. The required measuring range of the pressure transmitter is set with DIP switches. The output signal can be changed from voltage [V] to current [mA] by setting a jumper. A DIP switch allows two different damping times to be selected so that pressure fluctuations within the ventilation system are attenuated in the transmitter output signal. A green LED indicates that supply voltage has been connected correctly. If the actual pressure is outside the selected measuring range, the green LED flashes