Teledyne 465M Concentration Alarm Status/Reset, Status LED’s, Alarm Status LED Color Alarm State

7.1.3.Concentration Alarm Status/Reset

The M465M front panel displays the concentration alarm status. An LED labeled ‘ALARM STATUS’ shows the alarm status as follows:

Table 7-1: Alarm LED’s

Alarm Status LED Color	Alarm State
Green	No alarm active
Amber	‘HI’ alarm active
Red	‘HI-HI’ alarm active

If the alarms are configured for latching operation, then the RESET button can be used to attempt to reset all alarms.

NOTE

Alarms can only be reset if the concentration measured has subsequently dropped below the alarm limit.

If the alarms are configured for non-latching operation, they will be automatically cleared when the concentration falls below the alarm threshold. The RESET button has no effect when the alarms are configured for non-latching operation.

See Sections 7.2.6 and 4.5.4 for additional details on concentration alarms.

7.1.4.Status LED’s

There are four Status LED’s on the front panel to the right of the concentration display. These LED’s provide a quick view of the instrument’s Status and provides indication of any problems that may exist. The normal state for these LED’s after the initial warm-up period is as follows:

Table 7-2:	Status LED’s
Status LED		Normal State
Sensor OK		ON
Invalid Reading		OFF
Check Lamp		OFF
Pneumatic Error		OFF

If any of these LED’s are in a different state than shown above, then some adjustment or troubleshooting should be performed. See Section 10.2 for more detailed information.

P/N 06160D DCN6409 Teledyne API Model 465M O3 Monitor Instruction Manual - Page 32