Teledyne 9060 - Zirconium oxide flue gas oxygen analyzer - Manual (Page 67)

9060-Zirconia Analyser
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Typically set at 30 seconds. This delay is to avoid nuisance alarms when the burner is
undergoing transitions in firing rate that can cause it to deviate from the oxygen set point,
but recover quickly.
Range:
0–200 seconds. The default setting is 60 seconds.
73. Low Oxygen Alarm
Set the operating point for the low oxygen alarm relay. Typically set at 2.0% oxygen,
depending on the burner, it can be used as a safety warning.
Range:
0.1 –21% oxygen. The default setting is 2.5 % oxygen.
74. Low Oxygen Delay
Typically set at 30 seconds. This delay is to avoid nuisance alarms when the burner is
undergoing transitions in firing rate that can cause it to deviate from the oxygen set point,
but recover quickly.
Range:
0–200 seconds. The default setting is 10 seconds.
75. Oxygen Deviation Alarm (Only available if ‘2 sensors’ is selected in set-up 1)
If the difference between 2 sensors running on a transmitter is greater than the limit set
here, the alarm will be triggered.
This alarm could be used to give an on-line warning of a problem in one of the sensors.
Range:
0.1 –21% oxygen. The default setting is 2.0 % oxygen.
76. Oxygen Deviation Alarm Delay (Only available if ‘2 sensors’ is selected in set-up 1)
A 30 second delay in the activation of this alarm will usually be ample to cover any
deviation due to short-term stratification differences between the two sensors.
Range:
0–200 seconds. The default setting is 30 seconds.
77. Very Low Oxygen Alarm
Set the operating point for the very low oxygen alarm relay, typically 0.5% oxygen. This
limit can be used as a shut down on a boiler as the normal operating level should never be
this low.
Range:
0.001 –2.000% oxygen. The default setting is 0.500 % oxygen.
78. Very Low Oxygen Delay
Set the very low oxygen alarm delay to the smallest possible period to avoid nuisance
alarms/shut-downs, but still maintain the fastest response to a fuel rich atmosphere
Range:
0–200 seconds. The default setting is 2 seconds.
79. Alarm Relay #2
Any or all of the following alarm functions may be used to activate the alarm relay. They
may be selected or de-selected using the ‘ENTER’ buttons as in set-up step 33.
Options :
1. Low oxygen