Teledyne 465M instruction manual Status LED/Output Definitions

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	Status LED	Normal	Triggers		Critical
Output #	Label	Operating			Warning?
		State
1	Sensor OK	On		Reference < 125.0 mV	Yes
			 Reference > 1230.0 mV – 0.5 Wt%
2	Invalid Reading	Off		O3 Concentration < F.S. Range	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 > 18.0 psia
				Flow < 500 cc/min*
*If Flow	Switch installed

P/N 06160D DCN6409 Teledyne API Model 465M O3 Monitor Instruction Manual - Page 66