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Teledyne API – Model T300/T300M CO Analyzer 
140 
5.10. SETUP MORE  ALRM (OPTION): USING THE GAS 
CONCENTRATION ALARMS 
The T300/T300M includes two CO concentration alarms if OPT 61 is installed on your 
instrument.  Each alarm has a user settable limit, and is associated with a Single Pole 
Double Throw relay output accessible via the alarm output connector on the 
instrument’s back panel (See Section 3.3.1.4).  If the CO concentration measured by the 
instrument rises above that limit, the alarm‘s status output relay is closed. 
The default settings for ALM1 and ALM2 are: 
Table 5-10: 
CO Concentration Alarm Default Settings 
ALARM STATUS 
LIMIT 
SET 
POINT
alm1 Disabled 
100 
ppm 
alm2 Disabled 
300 
ppm 
1
Set points listed are for PPM.  Should the reporting range units of measure be changed (See 
Section 5.4.3) the analyzer will automatically scale the set points to match the new range unit 
setting. 
 
Note 
To prevent the concentration alarms from activating during span 
calibration operations ensure that the CAL or CALS button is pressed 
prior to introducing span gas into the analyzer. 
 
 
06864B DCN6314