Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 86)

Maintenance and Calibration Model 3500
Teledyne Analytical Instruments 72
absorption by the calibration tube and the connection tubes are
negligible.
6.2.1 Calibration Procedure
To calibrate the system, follow the procedure listed below:
1. Turn off the system power supply.
2. Loosen the mounting nut and take off the transmitter unit and the
receiver unit (Figure 6.2). Check the optical parts for cracks, dust
or other contaminants. If damage or contamination is evident
refer to section 6.1.2 to clean and maintain the optical parts.
Figure 6.2 Removing the Transmitter Receiver Units
3. Mount the transmitter and receiver units to the flanges at the
each end of the calibration devices, then and fasten the locknut
(Figure 6.3)