Teledyne 300M - Manual (Page 114)

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
11.2 Replacement of Sample Filter
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.
11.3 Leak Checking
There are two methods of leak checking.
11.3.1 Using a Leak Checker
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.
CAUTION
Do not exceed 15 PSI of pressure.
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.
11-2