Teledyne M201E Benutzerhandbuch

 

Calibration Procedure

 

05206H DCN5910

 

17

 

1. Press 

CALZ 

The M201E enters the calibrate mode from sample 
mode. The zero gas is supplied through the ZERO
inlet port on the rear panel of the M501 NH

3

,. 

2 

Table 2.1 

 

  Since the zero gas concentration is defined as 0 ppb, it is not necessary to 

enter the expected concentration values. 

  Both the TN

x

 and NO

x

 channels must be zeroed individually. When you 

zero the NO

x

 channel both the offsets for NO

x

 and NO are configured. All 

readings should display zero following this action. 

  It is recommended that the calibration of both the TN

x 

and NO

x

 channels 

be done at one time.  

  Always confirm that excess zero air is flowing past the sample or zero 

port, if the Zero/Span option is present, 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 zero offset 
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 zero gas for extended 

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

 

The analyzer can be spanned by either applying nitric oxide gas straight to the 
Sample port or through the Zero/Span valve option, if installed. It is important to 
remember that if the analyzer was previously sampling

 

ammonia gas, prior to 

conducting a nitric oxide span calibration, it will take some period of time before 
the TN

x

 channel stabilizes. The process of spanning the analyzer consists of 

diluting bottled gas, using a calibrator and delivering to the analyzer. The