Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 55)

Laser Gas Analyzer Operation
Teledyne Analytical Instruments 41
a. Item name
b. Unit of the item
c. Current value
d. New data input. The underscore after the number shows where
the next digit goes.
Note: After the system parameter input window pops up,
keystrokes “<” and “>” are disabled.
The “SET” key is used to accept the new setting and close the input
window. If no data is keyed in, and “SET” is pressed, the system
defaults to 0. If the data keyed in is out of range, an error alert is issued.
Use the “ESC” key to reject the new setting and close the input
window. The “ESC” key is used when you have input wrong data and do
not want the system to accept it.
The numerical keys “0-9” are used to enter data digits. The
underscore moves a position to the right with each input. Similarly, the
decimal point key “.” Is used to input the decimal point.
The Backspace key, “BKSP”, is used to delete the last data digit,
The underscore moves a position to the left with each deletion.
4.3.3.2 S YSTEM SUB MENUS
The sub menus of the System menu are:
• Path: —set optical path length value (0-12m), manual.
• Temp: — set temperature of the gas under test (200-3000) K,
manual or from a measurement. When choose Measure, the
system enters Measured Temperature Set menu.
• Pressure: —set pressure of the gas under test (0-20) bar, manual
or from a measurement. When choose Measure, the system
enters Measured Pressure Set menu.
• Av Times: —set number of times used to calculate average
concentration (0-90), manual.
• Out Set: —set the range of 4-20mA concentration output.
• Purge: —set parameters of the purging gas including purging gas
concentration, purging path and purging gas temperature.