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Teledyne API Model 465H O
3
Monitor User Manual
06161H DCN7969
7.1.3.
Concentration Alarm Status/Reset
The 465H front panel displays the concentration alarm status of the sample gas. The
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.
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 7.2.3 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 provide 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.
NOTE
Alarms can only be reset if the concentration measured has
subsequently dropped below the alarm limit.
Summary of Contents for 465H
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