30
To review the parameter values currently programmed into the
personal
DataRAM,
click on
Get configuration
. After editing the parameters, click on
Set
configuration
to input the new values into the
personal
DataRAM program.
Most operations within
p
DR-COM are self-evidently labeled, including fly-over
dialog boxes. In addition, instructions may be found in the On-line Help files by
selecting
Help
and then
Contents
.
The following operating/logging parameters of the
personal
DataRAM are selected
(edited) via the computer:
•
Current date (month and day of the month)
•
Current time (hour, minute and second)
•
Display averaging time (1 to 60 seconds, in 1-second increments)
•
Calibration factor (0.01 to 9.99, in 0.01 increments)
•
Logging interval (1 to 14,400 seconds, in 1-second increments)
•
Analog output full scale concentration (0.1, 0.4, 1, 4, 10, 40, 100, or 400 mg/m
3
)
•
Analog output status (enabled, or disabled) (can also be selected directly through
personal
DataRAM keyboard, see Section 8.2)
•
Alarm level (0.001 to 400 mg/m3, in 1-µg/m
3
increments)
•
Alarm mode (Off, Instantaneous, or STEL) (can also be selected directly through
personal
DataRAM keyboard, see Section 8.2)
The serial number of the
personal
DataRAM is transferred automatically to the PC
and displayed on its screen.
In addition, the user can input any other identification for the instrument (up to 20
characters).
9.4
Real-Time RS-232 Output
During the RUN mode, the
personal
DataRAM can communicate real-time
concentration data through its serial port via the
p
DR-COM software package. This
software application decodes the data and displays it on the computer screen in both
graphical and tabulated form.
In order to use this output with some other application, the following information
will enable the user to decipher the encoded output signal.
The communication settings for the digital output of the
personal
DataRAM are:
•
Baud rate:
4800 bps or 9600 bps
• Data
bits: 8
• Stop
bits: 1
• Parity:
none
• Flow
control:
Xon/Xoff
