Справочник Пользователя для Teledyne gfc 7000ta

 

Teledyne Analytical Instruments 

223 

Values outside range indicate 
Contamination of the zero air or span gas supply  
Instrument is miss-calibrated 
Blocked gas flow 
Contaminated or leaking GFC wheel (either chamber) 
Faulty IR photo-detector  
Faulty sample faulty IR photo-detector pressure sensor (P1) or circuitry 
Invalid M/R ratio (see above) 
Bad/incorrect span gas concentration due. 

Values outside range indicate  
Contamination of the zero air supply  
Contaminated or leaking GFC wheel (either chamber) 
Faulty IR photo-detector  

The Signal I/O parameters found under the DIAG Menu (See Section 6.9.2 and Appendix A) combined 
with a thorough understanding of the instrument’s Theory of Operation (found in Section 10) are useful for 
troubleshooting in three ways: 

  The technician can view the raw, unprocessed signal level of the analyzer’s critical inputs and 

outputs.   

  All of the components and functions that are normally under algorithmic control of the CPU can be 

manually exercised.   

  The technician can directly control the signal level of the Analog and Digital Output signals. 

This allows the technician to systematically observe the effect of directly controlling these signals on the 
operation of the analyzer.  Below in Figure 11-2 is an example of how to use the signal I/O menu to view 
the raw voltage of an input signal or to control the state of an output voltage or control signal.  The 
specific parameter will vary depending on the situation.