Teledyne LGA-3500 - Laser Gas Analysis system - Manual (Page 19)

Laser Gas Analyzer Introduction
Teledyne Analytical Instruments 5
The central processing or control unit is a separate wall-mounted
enclosure located remotely from the process or point of analysis. It
houses the system electronics and includes the operator interface panel
on the front door. Figure 1 shows the Model 3500 control unit. A
separate enclosure is provided for the power supply
The operator interface consists of a panel of membrane switches for
controlling the operational mode of the instrument as well as entering
data. A large LCD display provides feedback to the user and indicates
the gas composition during analysis.
Figure 1-1 Control Section
The system is equipped with a separate power supply and output
control section which is also mounted remotely from the measurement
site. It houses power supplies and connectors for signal and relay output.
See Figure 1-2.