Справочник Пользователя для Teledyne gfc 7000ta

 

Teledyne Analytical Instruments 

183 

The Test Functions can be used to predict failures by looking at how their values change over time.  
Initially it may be useful to compare the state of these Test Functions to the values recorded on the 
printed record of the final calibration performed on your instrument at the factory, p/n 04307.  Table 9-3 
can be used as a basis for taking action as these values change with time.  The internal data acquisition 
system (DAS) is a convenient way to record and track these changes.  Use APICOM to download and 
review this data from a remote location. 
  
Table 8-3:     Predictive uses for Test Functions 

Zero Cal 

Increasing 

Pneumatic Leaks – instrument & sample system 
Detector deteriorating 

Zero Cal 

Decreasing 

Source Aging 
Detector deteriorating 
Optics getting dirty or contaminated 

Zero Cal 

Increasing 

Source Aging 
Detector deteriorating 
Contaminated zero gas (H2O) 

Decreasing 

Source Aging 
Detector deteriorating 
GFC Wheel Leaking  
Pneumatic Leaks 
Contaminated zero gas (CO

2

) 

Span Cal 

Increasing 

Source Aging 
Pneumatic Leaks – instrument & sample system 
Calibration system deteriorating 

Decreasing 

Source Aging 
GFC Wheel Leaking 
Calibration system deteriorating 

Sample 

Increasing > 1” 

Pneumatic Leak between sample inlet and Sample Cell 
Change in sampling manifold 

Decreasing > 1” 

Dirty particulate filter 
Pneumatic obstruction between sample inlet and Sample 
Cell 
Obstruction in sampling manifold 

Any, but with 

Bench Temp at 

48°C 

Increasing 

Mechanical Connection between IR-Detector and Sample 
Cell deteriorating 
IR-Photodetector deteriorating 

Zero Cal 

Increasing 

See MR Ratio - Zero Cal Decreasing above 

Decreasing 

See MR Ratio - Zero Cal Increasing above 

Span Cal 

Increasing 

See MR Ratio - Span Cal Decreasing above 

Decreasing 

See MR Ratio – Span Cal Increasing above