Teledyne M300EM User Manual

8.6.6. HESSEN PROTOCOL GAS LIST ENTRIES  

8.6.6.1. Gas List Entry Format and Definitions 

The M300E/EM Analyzer keeps a list of available gas types.  Each entry in this list is of the following format. 

WHERE: 

=  The type of gas to be reported (e.g. CO, CO

2

, O

2

, etc.).

 

=  The concentration range for this entry in the gas list.  This feature permits the user to 

select which concentration range will be used for this gas list entry.  The M300E/EM 
Analyzer has two ranges: RANGE1 or LOW & RANGE2 or HIGH (See Section 6.6.1). 
0 -  The HESSEN protocol to use whatever range is currently active.   
1 -  The HESSEN protocol will always use RANGE1 for this gas list entry. 
2 -  The HESSEN protocol will always use RANGE2 for this gas list entry. 
3 -  Not applicable to the M300E/EM Analyzer. 

 

=  An identification number assigned to a specific gas.  In the case of the M300E/EM 

Analyzer in its base configuration, there is only one gas CO, and its default GAS ID is 
310.  (Note: This ID number should not be modified). 

=  States whether this list entry is to be reported or not reported when ever this gas type or 

instrument is polled by the HESSEN network.  If the list entry is not to be reported this 
field will be blank. 

While the M300E/EM Analyzer is a single gas instrument that measures CO, it can have additional, optional 
sensors for CO

2

 or O

2

 installed.  The default gas list entries for these three gases are: 

These default settings cause the instrument to report the concentration value of the currently active range.  If you 
wish to have just concentration value stored for a specific range, this list entry should be edited or additional 
entries should be added to the list. 

EXAMPLE:  Changing the above CO gas list entry to read: 

would cause only the last CO reading while RANGE2 (HIGH) range was active to be recorded. 

 

04288D DCN5752