Teledyne 300M User Manual

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A 
 

1.  Turn off the analyzer. This will stop the pump and eliminate the possibility of sucking debris 

into the analyzer while changing the filter element. 

2.  Open the front panel and remove the transparent filter cover and knurled retaining ring. 

3.  Remove the Teflon hold-down O-ring. 

4.  Remove the old filter element and discard. 

5.  Install a new filter element in the filter cavity. Be careful with the element, it is fragile.  

6.  Replace the hold-down O-ring (notch up) on top of the filter element. 

7.  Replace the filter top and re-tighten. 

8. Leak check. 

9.  Turn on the analyzer. 

There are two methods of leak checking. 

Turn the power off. Disconnect the fittings from the pump and bypass the pump. Connect the 
leak checker to the sample inlet of the Model 300M. Cap the exhaust of the analyzer. Set the leak 
checker to pressure mode. 

 

 

Leave the checker on until 15 PSI is achieved. Close the valve and ensure the pressure remains at 
15 PSI for at least 5 minutes. If pressure drops more than 1 PSI in 5 minutes, there is a leak and 
it must be repaired. 

If there is a leak present, pressurize the Model 300M to 15 PSI and put soap bubble solution on 
pneumatic assemblies until the leak is found.