The Temperature 2 Pressure Probe (T2P): Technical Manual

INTRODUCTIONThe University of Texas (UT) has developed a pressure probe to be referred to as ‘The Temperature TwoPressure Probe’ (Figure 1) or T2P, for short (Flemings et al., 2006). The T2P is composed of interlockingsteel cylinders accentuated by a needle shaft housing two porous pressure ports. Within the DAQ Housingof the probe is an IODP-USIO developed data acquisition system (CDAQ) (Meiring, 2008) adapted for thespecific uses of the T2P.Figure 1: Diagram of Temperature Two Pressure Probe (T2P)The CDAQ is an inclusive controller for the T2P. It operates an onboard accelerometer, onboard thermistor,and (1) thermistor and (2) analog pressure transducers that sample in-situ conditions at the tip of the probe.The program T2PLOGGR.run is housed on the CDAQ and is initiated by an external computer via serialcable. Once the program is initiated it follows the logic shown in Figure 2. It is terminated by user input. Thesubsequent data are analyzed by a separate post-processing program (T2PImport.xls).Figure 2: Flow Diagram for T2P Data AcquisitionVersion 1.0 Page 39/21/2012