Principles of Operation Teledyne API T803 CO2/O2 Analyzer Operation Manual
216

AC Relay Retainer

Plate

Retainer

Mounting

Screws

Figure 12-10: Relay PCA with AC Relay Retainer in Place

12.6.3.1. STATUS LEDS

LEDs located on the Analyzer’s relay PCA, show the current status of various

control functions performed by the relay PCA The three that are used in the T803

are described in Table 12-1, and their locations are illustrated in Figure 12-11.

Table 12-1: Relay PCA Status LEDs
LED Color Function Status When LED Lit
(Energized State)
Status When LED Unlit
(Default State)
D1 Red Watchdog Circuit Cycles ON/OFF every 3 Seconds
under direct control of the analyzer’s CPU.
D2-D4 SPARE
D5 Yellow CO2 Sensor Cell heater Heating Not Heating
D6 Yellow O2 Sensor heater Heating Not Heating
D72 Green
D82 Green
D92 Green
D102 Green
D11 - 16 SPARE
2 Not Used.
07276B DCN6418