PPT001-1G-WW-2V-A Sensotec Precision Pressure Transducer

The Honeywell / Sensotec PPT Series Precision Pressure Transducers offer extraordinary value with high accuracy over a wide temperature range. The PPT Series combines proven silicon sensor technology with microprocessor-based signal conditioning to provide an extremely smart pressure transducer. Manufactured in a compact, rugged design, the PPT Series has many software features that support a wide range of applications.

The Honeywell / Sensotec PPT Series Precision Pressure Transducers provide high accuracy pressure readings in both digital and analog form. The first-time user will be able to use the PPT within minutes, yet capability exists to configure the PPT for optimum performance in specific applications.

The heart of the PPT measuring system is a silicon piezoresistive sensor which contains both pressure and temperature-sensitive elements. Digital signals representing temperature and pressure are processed by a microprocessor to produce fully temperature compensated and calibrated pressure readings over the entire -40 to 85°C temperature range.

The PPT Series receive commands and sends data from either a RS-232 port or a multidrop RS485 port. Using the RS-232 type PPT, up to 89 units can be connected in a ring configuration to a single serial port of a computer. The RS-485 type PPT allows up to 89 PPTs to be connected to a two-wire multidrop bus, when bus repeaters are used to satisfy the RS-485 bus electrical requirements. Group (multicast) addressing allows up to nine groups of PPTs to be addressed with a single command. Global (broadcast) addressing will send a command to all PPTs on the serial bus. Any computer having a serial port and terminal emulation software can be connected to the PPT to allow the user to select baud rates, sample rates, readout resolution, units of pressure and other choices.

Analog output from the 12-bit digital-to-analog converter may be obtained without a host computer. User selected functions may be set through the digital interface. The selected functions may either be used temporarily, until the PPT is powered down, or may be stored in the internal EEPROM to automatically configure the PPT each time power is applied.

Both the analog and digital outputs are corrected digitally over the full range of -40 to 85°CC. The PPT has a typical accuracy of 0.05% of full scale (FS) and the PPTR has a typical accuracy of 0.10%FS. Note that full scale for a 20 psig and a 20 psia is 20 psi, but for a 20 psid it is 40 psi. This is important to note when determining the accuracy allowance.