Emerson NGA2000 TO2 instruction manual TO2 analyzer gives erratic and very in- sensitive readings

Instruction Manual

748374-F March 2003

Model NGA2000 TO2

sensor is a partial pressure measuring device, an increase in sample pressure will cause an increase in reading. If the reading drops with increased flow, conduct the leak check outlined in the troubleshooting tip above.

The TO2 analyzer gives erratic and very in- sensitive readings.

Check to see that the electrolyte level is within the limits indicated on the reservoir. Add dis- tilled water as required. If the level is within lim- its, the electrolyte may have been contaminated. Refer to Section 4-3 on page 4-2 above for proper procedure to replace electro- lyte. If replacement of electrolyte does not im- prove the performance of the sensor, the sensor may have been damaged due to over- pressurization or poisoning. Sensor replace- ment may be required as described in Section 4-4 on page 4-2.

4-4 Maintenance and Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management