Teledyne Dollhouse 400E Manuale Utente

While it is possible to perform the following procedure with any range setting, we recommend that you perform 
this initial checkout using following reporting range settings: 

  Unit of Measure: PPB 
 Reporting 

Range: 

 Mode Setting: SNGL 

These are the default setting for the M400E analyzer; however, it is a good idea to verify them before proceeding 
with the calibration procedure.  Use the same method as described in Section 3.6.2.1. 

 

Unlike other versions of the M400E, analyzers with the IZS option installed do not require the expected span gas 
concentration be set during initial start-up because no initial span calibration is performed.   
 

To ensure that the analyzer maintains maximum performance levels when monitoring low levels of O

3

, the 

instrument’s AUTOCAL feature (only active on analyzers with the IZS option  installed) should be used to initiate 
a zero-point calibration once every day.   

The appropriate AUTOCAL sequence settings are: 

Define sequence #1 

Select zero calibration  mode 

Enable the timer 

Start running sequence after January 
1, 2003 

Start initial zero-point calibration at 
starts at midnight. 

Do Sequence #1 every day 

Do Sequence #1 at the same time 
every day 

Operate zero-cal valve for 15 min 

The instrument will re-set the slope 
and offset values for the O

3

 

measurement calculation at the end of 
the auto-cal sequence 

1

 While most of the settings required for this sequence are the instrument’s default 

settings, and therefore do not need to be changed, they should be verified. 
If any of these settings do not match those shown, see the instructions in Section 9.4. 

To activate this daily zero point calibration: