Instruction Manual
IM-106-350C, Rev 2.2
July 2008
4-3
Hazardous Area Oxymitter 5000
Read O
2
Concentration
The O
2
range of the Oxymitter is set through the fieldbus interface using the
A1 function block.
Refer to Appendix D for more information on using the A1 function block.
Once the cell is up to operating temperature, the O
2
percentage can be read:
1. To access TP5 and TP6 under the LOI module (Figure 4-2), power
down the Oxymitter 5000 and remove the LOI module. Attach alligator
leads from a multimeter across TP5 and TP6. Install the LOI module
and power up the Oxymitter 5000. Allow time for the cell to reach
operating temperature. The calibration and process gases can now be
monitored. When a calibration has been initiated, the value at TP5 and
TP6 is the % O
2
seen by the cell. Oxygen levels, as seen on the
multimeter, are:
8.0% O2 = 8.0 VDC
0.4% O2 = 0.4 VDC
NOTE
The maximum reading available at TP5 and TP6 is 30 VDC. While the
Oxymitter will measure concentrations up to 40% the test point output will
reach a maximum of 30 VDC at a 30% oxygen concentration.
2. FOUNDATION fieldbus.
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