4-16 | Thermox TM2000 Oxygen Analyzer
Sensor Conguration
This menu option allows you to select either normal operations or hy-
drocarbon upset condition operations. The hydrocarbon upset condition
option allows the system to recognize a hydrocarbon upset condition and
trigger an alarm if that condition is reached.
If you do not want to use the Hydrocarbon Upset option, select Nor-
mal for the Sensor Configuration.
Congurating the Sensor
1. Select Sensor Config from the Setup Key menu.
2. Select Normal or Hydrocarbon Upset.
3. If you select Hydrocarbon Upset in Step 2 above, you are then
prompted to enter a millivolt value that, if exceeded, triggers the hy-
drocarbon upset condition.
If the oxygen reading drops to 0 PPM, and the millivolt value you
entered is reached or exceeded, the system displays a low oxygen/high
hydrocarbons message rather than the oxygen reading (assuming
oxygen is displayed on the control unit). It also trips Alarm 4.
If the oxygen reading is 0, but the cell millivolt threshold value has not
been reached, the system will display a low oxygen/low hydrocarbon
message.
If you select Hydrocarbon Upset in Step 2 above, Alarm 4 becomes
fixed as a high oxygen alarm and also acts as a hydrocarbon upset
alarm. You may need to reenter your alarm setpoints and configura-
tion.
Once a hydrocarbon upset condition is reached (and assuming you select-
ed Hydrocarbon Upset), the display switches from displaying the oxygen
reading to displaying a hydrocarbon condition text message.
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