Stream Selector Status/Control (Optional); Concentration Alarm Status/Reset; Table 7-1: Alarm Led's - Teledyne 465L Operation Manual

Teledyne API Model 465L O 3 Monitor Operation Manual

7.1.3. Stream Selector Status/Control (Optional)

The optional multi-channel stream selector can be controlled via the front panel.
The stream selector operates in two modes, Auto and Manual. The Auto mode is
normally the default mode. The 'AUTO' and 'MAN' LED's show the current
mode. To switch modes, press and hold the SELECT button for at least 2 seconds.
When in Manual mode, momentarily pressing the SELECT button will switch to
the next stream.
The stream selector status is shown by the six LED's labeled 'SAMPLE POINT.'
One of the LED's should always be lit, showing the current channel being measured.
Note that for a three-channel instrument, only streams 1-3 can be measured. See
Section 7.3 for additional details on the operation of the stream selector.
When the instrument is in its default configuration, there is a Manual mode timeout
feature that will automatically return the stream selector to Auto mode when no keys
are pressed for 10 minutes. This is the recommended setting for instruments used
for critical safety applications. This feature prevents the instrument from being
inadvertently left in Manual mode, and subsequent loss of monitoring data from the
other, unmeasured channels. For applications where Manual mode is the preferred
mode of operation, this timeout feature can be turned off. See Section 7.2.6 for
details on changing this setting.

7.1.4. Concentration Alarm Status/Reset

The 465L front panel displays the concentration alarm status of all channels being
sampled. The row of LED's labeled 'ALARM STATUS' shows the alarm status for
each channel as follows:
If the alarms are configured for latching operation, then the RESET button can be used to attempt
to reset all alarms. Note that alarms can only be reset if the concentration measured for a specific
channel 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 7.2.7, 4.2.4, and 4.2.5 for additional details on concentration alarms.
38

Table 7-1: Alarm LED's

Alarm Status LED Color
Green
Amber
Red
Teledyne API Model 465L O
Alarm State
No alarm active
'HI' alarm active
'HI-HI' alarm active
NOTE
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