41. LOW OXYGEN ALARM
Set the operating point for the low oxygen alarm relay. Typically set at 2.5% oxygen, depending on the burner, it can be
used as a safety warning.
The low oxygen alarm has a dual range selected by a link on screw terminals 14 & 15 ( FUEL 1/2 ). If the link is NOT
connecting the two terminals, the range will be 0.1 to 30.0 % oxygen. If the terminals have a short circuit link between
them, the range will be 1 to 300 ppm oxygen.
Range:
0.1 –30% oxygen. The default setting is 2.5 % oxygen.
1 –300 ppm. (With screw terminals 14 & 15 linked)
42. LOW OXYGEN DELAY ( only available if ‘Continuous’ is selected in Set-up 26 )
Typically set at 10 seconds.
Range:
0–200 seconds. The default setting is 10 seconds.
43. VERY LOW OXYGEN / FILTER FAIL ALARM
Set the operating point for the very low oxygen alarm level, typically 0.5% oxygen. This limit can be used as an
extreme case alarm level where the normal operating level should never be this low.
If an external combustibles active filter is being used in a wave soldering application, link screw terminals 14 & 15.
This will automatically select the alarm range from 0.1 to 30 ppm. If the measured oxygen level falls below the alarm
level, the alarm message will be “Filter Fail”.
Range:
0.1 –30% oxygen. The default setting is 1.5 % oxygen.
0.1 –30 ppm. (With screw terminals 14 & 15 linked)
44. VERY LOW OXYGEN DELAY ( only available if ‘Continuous’ is selected in Set-up 26 )
Set the very low oxygen alarm delay.
Range:
0–200 seconds. The default setting is 2 seconds.
45. HIGH CARBON DIOXIDE ALARM
Set the operating point for the high carbon dioxide alarm relay.
Range:
0 – 100 % oxygen. The default setting is 40 % carbon dioxide.
46. HIGH CARBON DIOXIDE DELAY ( only available if ‘Continuous’ is selected in
Set-up 26 )
Typically set at 30 seconds.
Range:
0–200 seconds. The default setting is 30 seconds.
47. LOW CARBON DIOXIDE ALARM
Set the operating point for the low carbon dioxide alarm relay. Typically set at 20 % carbon dioxide.
Range:
0 – 100% carbon dioxide. The default setting is 20 % carbon dioxide.
48. LOW CARBON DIOXIDE DELAY (only available if ‘Continuous’ is selected in Set-up
26)
Typically set at 10 seconds.
Range:
0–200 seconds. The default setting is 10 seconds.
Page 38 Teledyne Analytical Instruments 9070 Oxygen Analyzer
