Ametek 888

E-2 | Model 888 ATEX IECEx Tail Gas Analyzer
Operational Alarms
Op[erational alarms indicate a condition that prevents normal analyzer
operation. The condition may or may not require user intervention to
clear the problem. Operational alarms include:
• Low Light Intensity on a detector channel
• Sample Cell Temperature is outside the minimum/maximum values
• Demister Cell Temperature is outside the minimum/maximum values
• Sample Flow is outside the minimum/maximum values
• Excessive Sample Cell Pressure indicating a possible probe blockage
• Manifold Pressure is too low: pneumatic valves may not be operating
properly.
Level 2 Alarms
A Level 2 alarm condition indicates a serious problem with the analyzer.
The analyzer responds by opening both the system alarm and data valid
alarms. The state machine, however, does not jump to the Not Ready
state. A Level 2 alarm condition can occur when there is a failed zero or
span calibration cycle or if a service technician stops the period timer.
Level 2 alarms include:
• Period Timer stopped
• Span calibration factor is outside the minimum/maximum values
• Zero calibration failure
Level 3 Alarms
A Level 3 alarm condition is a warning that a more serious problem is im-
minent. There is a visual warning on both the local and remote displays.
The operator should take action to prevent the problem from becoming a
Level 1 or Level 2 alarm. Level 3 alarms include:
• Excessive Flash Warning indicating that the light intensity is dropping
• Low Flange Temperature warning indicating the possibility of a blockage
• Detector Temperature alarm indicating that the accuracy of the con-
centration measurements may be affected.