DICTIONARY OF AUTOMOTIVE TERMS - "Ps"

PS

Acronym for Power steering.

PSA

Acronym for Pressure Switch Assembly

PSC

Acronym for Power Steering Control

P. seat

Abbreviation for Power seats.

PSI

Acronym for pounds per square inch -- a unit of inflation for a tire, air brake system pressure, and turbocharger boost, or a unit of measurement for an engine's Compression. Normal atmospheric pressure at sea level is 14.7 psi. Metric measurement uses kilopascals.

PSIA

Acronym for pounds per square inch absolute. Absolute pressure equals gauge pressure plus atmospheric pressure.

PSIG

Acronym for pounds per square inch gauge. The G indicates that it is gauge pressure and not absolute pressure.

PSOM

Acronym for Programmable Speedometer Odometer Module

PSOV

Acronym for Purge Shut Off Valve (Ford)

PSP

Acronym for Power Steering Pressure -- Detects power steering load

PSPS

Acronym for Power Steering Pressure Switch

PSR

Acronym for power sun roof.

Psychrometer

Instrument for measuring the relative humidity of atmospheric air. Also called wet bulb hygrometer

Psychrometric chart

Chart that shows relationship between the temperature, pressure, and moisture content of the air.

Psychrometric measurement

Measurement of temperature pressure and humidity using a psychrometric chart.