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06160J DCN7969
Teledyne API Model 465M O
3
Monitor User Manual
65
10.2.
Troubleshooting Using Front Panel Status
LED’s or Status Outputs
The 465M 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 > 16.0 psia
•
Flow < 500 cc/min*
No
*If Flow Switch installed