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P/N 06160D DCN6409 Teledyne API Model 465M O
3
Monitor Instruction Manual - Page 66
10.2. Troubleshooting Using Front Panel Status
LED’s or Status Outputs
The M465M has 4 front-panel status LED’s that reflect the current operating status of the
monitor, and indicate fault conditions. There are also four relay Status Outputs on the
rear panel (or internally in the NEMA configuration) that also reflect the state of these
status LED’s. See Section 4.5.3 for more information on the Status Outputs.
Table 10-1: Status LED/Output Definitions
Status
Output #
Status LED
Label
Normal
Operating
State
Triggers Critical
Warning?
1 Sensor OK On
Reference < 125.0 mV
Reference > 1230.0 mV – 0.5 Wt%
Yes
2 Invalid Reading Off
O3 Concentration < F.S. Range
O3 Concentration > F.S. Range
No
3 Check Lamp Off
Reference < 250.0 mV
No
4 Pneumatic
Error
Off
Pressure < 9.0 psia
Pressure > 18.0 psia
Flow < 500 cc/min*
No
*If Flow Switch installed