Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 60)

Operation Model 3500
Teledyne Analytical Instruments 46
measurement result.
4.3.4 Cali.
Cali. main menu is third from left on MainMenu. Pressing “SET”,
the system prompts for the password, if the password is entered
correctly, the system enters Cali. main menu. (Figure 4.23)
Note: In error mode, the system is in Error Protection Menu (see
Figure 4.39), and the Cali. menu is not accessible.
Figure 4.23 Cali. Main Menu
From this menu, the operator can perform the following operations:
• Adjust zero point: Fill the calibration tube with standard gas
(such as high purity nitrogen) with 0% of the gas under test, and
zero calibrate.
• Calibrate coefficient: Fill the calibration tube with standard gas
(such as high purity Nitrogen) with known concentration of the
gas under test, and perform a span calibration operation.
Note: Perform the zero calibration before doing the span
calibration.