MODEL 300 COMBUSTION ANALYZER
1-6 Instruction 24-9223
Display Mode
Indicator Lit Meaning of Display Indication
Stack temperature detected by probe (°F or °C, see
label inside case).
Carbon Monoxide concentration as measured by the
CO sensor.
OK – No errors or warnings to report.
W*CO – Warning, CO sensor bad or trip limit of
+115 ppm was detected during calibration.
E*O2 – Error, O
2
cell bad or missing. Occurs at end
of calibration cycle if output of O
2
cell is
either less than 15.1 mV or greater than
65.9 mV.
E*TC – Error, thermocouple temperature is below
–100° or above 2300°F (–148° & 1260°C).
E*AM – Error, instrument temperature below or
above its operating temperature range of
32° to 122°F (0° to 50°C).
OR/C – CO channel overrange.
OR/A – Ambient temperature overrange.
OR/T – Thermocouple channel overrange.
OR/O –O
2
channel overrange, O
2
CELL indication
has exceeded 74.4 mV.
The Pump On indicator lights whenever the pump is
running.
Figure 1-2. Pump ON Light
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