Teledyne IR-7000 - Non-dispersive infrared series - Manual (Page 19)

NDIR Gas Analyzer Operational Theory 2
Teledyne Analytical Instruments., - Rev. 3 11
2.3 Electronics
The IR7000 uses a sophisticated microprocessor to control the signal
processing, I/O, and display functions within the analyzer. Custom
EPROMs are installed with permanently stored data and routines specific
to the customer’s application. Depending on what options are installed, 2
or more PCB’s are used in the electronic subsystem. Figure 2-2 shows the
location of the boards in the portable model. Other models are similar but
mount the boards differently.
2.3.1 Power Supply
This unit is externally powered by either 120 or 230 VAC. Fuses are
located on the back panel for circuit protection.
Figure 2-2: PC Board Identification and Location