Teledyne 465L, Operation Manual, Page: 79 / 89

Teledyne API Model 465L O3 Monitor Operation Manual
05509G DCN6806 Teledyne API Model 465L O
3
Monitor Manual 77
10.2.
Troubleshooting with Front Panel Status
LED’s or Status Outputs
The 465L 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 4.4.3 for more information on the Status
Outputs.
The Status LED’s are categorized into Critical and Non-Critical warnings. Critical
warnings are those that would normally require immediately removing the monitor
from service and repairing it. Non-critical warnings are those that indicate some
maintenance would be useful, but not immediately required.
Table 10-1: Status LED/Output Definitions
Status
Output # Status LED
Label Normal
Operating
State Triggers Critical
Warning?
1 Sensor OK On
•
No bench communications
•
Reference < 125.0 mV
•
Reference > 1230.0 mV
Yes
2 Invalid Reading Off
•
O
3
Concentration < -10.0 PPB
•
O
3
Concentration > F.S. Range
No
3 Check Lamp Off
•
Reference < 250.0 mV
No
4 Pneumatic
Error Off
•
Pressure < 9.0 psia
•
Pressure > 14.9 psia
•
Flow < 640 cc/min
•
Flow > 960 cc/min
No