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Preventive Maintenance and Servicing
Maintenance for the Sample Probe
Replacing the
5-10
Omni FTIR Multi Gas CEMS Instruction Manual
12. Power up the probe by turning on the Probe circuit breaker on the
breaker box to complete the procedure.
Use the following procedure to replace the pre-filter element in the sample
probe. The pre-filter is located inside the stinger (probe barrel).
Pre-filter
Replacement of the pre-filter will require that the entire probe assembly be
removed from the stack. Depending on the type and level of
contamination, the pre-filter can be cleaned with water in an ultrasonic
bath and then re-used.
Equipment Required:
Wrench, 15/16-inch and 3/8-inch
Hex wrench, 5/32-inch and 5/16-inch
Pre-filter element
CAUTION High surface temperatures present. Allow sufficient time to
cool.
▲
1. Flush the probe with inert gas or air to clear any toxic gases.
2. Shut down the probe by turning off the Probe circuit breaker on the
breaker box.
3. Using the 15/16-inch wrench, loosen and remove the 4 flange nuts and
washers that secure the probe assembly to the stack flange. Carefully
remove the probe from the stack with its gasket, taking care to center
the probe tip shield through the flange as it is removed. Plug the stack
opening with a flange cap for safety. Be extremely careful of the high
surface temperatures. Allow the stinger to cool before replacing the pre-
filter.
4. Using the 3/8-inch wrench and the 5/32-inch hex wrench, loosen the
locknut and screw on the probe tip shield at the end of the stinger, and
then remove the probe tip shield.
5. The pre-filter is recessed inside of the stinger. Using the 5/16-inch hex
wrench, unscrew the pre-filter and remove it. Properly dispose of the
used pre-filter. The pre-filter could be cleaned with water in an
ultrasonic bath and then re-used. If doing so, perform several blow
backs on the system after installation is complete to dry the pre-filter.
Thermo Fisher Scientific
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