Teledyne M201E Benutzerhandbuch

 

Calibration Procedure

 

05206H DCN5910

 

19

 

 
 

1. Press 

CALS 

The M201E enters the calibrate mode from sample 
mode. The NO gas is supplied through the SPAN inlet 
port on the rear panel of the M501 NH

3

,. 

2 

Table 2.3 

 

  Both the TN

x

 and NO

x

 channels must be spanned individually with nitric 

oxide gas. When you span the NO

x

 channel both the NO and NO

x

 

concentrations must be manually inputted. 

  It is recommended that the calibration of both the TN

x

 and NO

x

 channels 

be done at the same time.  

  Always confirm that SPAN gas is flowing past the sample or span port on 

the rear of the M501 NH

3

, converter. There should always be some 

excess flow. If insufficient flow is supplied to the analyzer ambient gas will 
be entrained and the span values will be incorrect. However, it is important 
not to over pressurize the analyzer. 

  It is a good idea to allow the analyzer to sample span gas for extended 

periods following span calibration. Large drifts can signify leaks or indicate 
an issue with the span gas source. 

  If after spanning with nitric oxide, the analyzer slopes are out of range 

conduct the following: 

  Confirm the gas sources are good. Usually the bottle is certified to 

a known level of nitric oxide. The bottle should be balanced with 
nitrogen. Try not to use the same regulator for nitric oxide as was 
used on ammonia. This also holds for the tubing between the 
different bottles and the mixing source (calibrator). 

  Confirm the zero reading is good by delivering Zero gas. 
  Confirm that the concentration delivered to the analyzer is equal to 

what you entered under the CONC menu NOx and TNx. 

  Leak check both the M501 NH

3

, and analyzer together. 

  Using section 11.6.5 of the M200E manual confirm that the PMT 

sensor hardware calibration is set correctly.