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Most operations within pDR-COM are self-evidently labeled,including fly-over dialog <br /> boxes. In addition, instructions may be found in the On-line Help files by selecting <br /> Help and then Contents. <br /> The following operating/logging parameters of the personalDataRAM are selected <br /> (edited)via the computer: <br /> • Current date (month and day of the month) <br /> • Current time (hour,minute and second) <br /> • Display averaging time (1 to 60 seconds,in 1-second increments) <br /> • Calibration factor(0.01 to 9.99,in 0.01 increments) <br /> • Logging interval (1 to 14,400 seconds,in 1-second increments) <br /> • Analog output full scale concentration (0.1,0.4,1,4,10,40, 100,or 400 mg/m3) <br /> • Analog output status (enabled, or disabled) (can also be selected directly through <br /> personalDataRAM keyboard, see Section 8.2) <br /> • Alarm level (0.001 to 409.599 mg/m3,in 1-µg/m3 increments) <br /> • Alarm mode (Off,Instantaneous,or STEL) (can also be selected directly through <br /> personalDataRAM keyboard, see Section 8.2) <br /> The serial number of the personalDataRAM is transferred automatically to the PC and <br /> displayed on its screen. <br /> In addition, the user can input any other identification for the instrument(up to 20 <br /> characters). <br /> Note:The year is entered as a two-digit number;year 2000 is treated correctly as a leap <br /> year (personalDataRAM version 1.70 or higher). <br /> 9.4 Real-Time RS-232 Output <br /> During the RUN mode, the personalDataRAM can communicate real-time concentration <br /> data through its serial port via the pDR-COM software package. This software <br /> application decodes the data and displays it on the computer screen in both graphical <br /> and tabulated form. <br /> In order to use this output with some other application,the following information will <br /> enable the user to decipher the encoded output signal. <br /> The communication settings for the digital output of the personalDataRAM are: <br /> • Baud rate:4800 bps <br /> • Data bits: 8 <br /> • Stop bits: 1 <br /> • Parity: none <br /> • Flow control:Xon/Xoff <br /> Every second during a run, the personalDataRAM serial port will output a sixteen- <br /> character code. It consists of two brackets with 14 hexadecimal digits between them, <br /> 25 <br />