LI-COR LI-7500, Инструкция по эксплуатации

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Section 3
Setup and Operation 3-13
COM Port
Use the arrow buttons to select the serial port on your computer to which the LI-7500 RS-232
cable is connected. Valid numbers are between 1 and 38.
Baud Rate
Use the Baud Rate pull-down menu to select the baud rate at which to communicate with the
LI-7500 through the LI-7500 serial port. The rate of data transfer is also dependent upon the
maximum rate available with your computer's serial port, and the update frequency (see Data
Acquisition Frequency below) to be used while the program communicates with the LI-7500.
Select from 9600, 19200, or 38400.
Data Acquisition Frequency
This is the update frequency to be used while the LI7500 program communicates with the
LI-7500. Select from 1, 2, 5, 10, or 20 Hz, or enter your own value (
≥
0 and
≤
20.0). Note
that at 9600 baud, the maximum update frequency is 5 Hz; at 19200 baud, 10 Hz; and at
38400 baud, 20 Hz.
Calibration Page - Setting the Zero and Span
The Calibration page allows you to view current values of CO
2
, H
2
O, pressure, and
temperature in real time for the purpose of calibrating the analyzer. Complete instructions for
calibrating the LI-7500 can be found in Section 4.