Filter
Top Products
Instruction Manual
IM-106-880C, OI
September 2009
8-7
Hazardous Area OCX 8800
Figure 8-2. Oxygen and Cell
Output
Cal Warning (Calibration warning)
Cal Failed (Calibration failed)
Probable Cause Recommended Corrective Action
COe sensor degraded
COe Slope Error (Slope not between 200
ppm/Ohm to 4,500 ppm/Ohm)
COe Constant Error (Constant not between
-100 Ohms to +100 Ohms)
Replace COe sensor or increase warning level (SYSTEM, CALIB SETUP, COe Slope
Warn via HART.)
Low sample gas flow in sensor housing due to
flow path plugging
Check the following portions of the flow path for plugging:
• blowback filter
• in-situ filter
• eductor outlet path
Calibration Gas concentration incorrect or gas
bottle empty
O
2
TOL Error (not within 10% of configured O2 test gas).
COe TOL Error (not within 30% of configured CO test gas).
Table continued on next page
20
10
8
9
7
5
0.8
0.9
0.7
0.5
0.6
0.4
0.3
0.2
0.1
6
4
3
2
1
-20 0 20 40 60 80 100 120
ANALYZER OUTPUT (MILLIVOLT)
(23)
(73)
37390051
OXYGEN CONCENTRATION (%)