Teledyne 465L operation manual Status LED/Output Definitions

Teledyne API Model 465L O3 Monitor Operation Manual

10.2.Troubleshooting Using Front Panel Status LED’s or Status Outputs

The M465L 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 4.2.3 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	Status LED	Normal	Triggers	Critical
Output #	Label	Operatin		Warning?
		g State
1	Sensor OK	On	∙ No bench communications	Yes
			∙ Reference < 125.0 mV
			∙ Reference > 1230.0 mV
2	Invalid Reading	Off	∙ O3 Concentration < -10.0 PPB	No
			∙ O3 Concentration > F.S. Range
3	Check Lamp	Off	∙ Reference < 250.0 mV	No
4	Pneumatic	Off	∙ Pressure < 9.0 psia	No
	Error		∙ Pressure > 14.9 psia
			∙ Flow < 640 cc/min
			∙ Flow > 960 cc/min

80 05509F DCN6409