Figure 9-6: Reaction Cell Assembly - Teledyne 200E Instruction Manual

Instrument Maintenance
all. To clean the reaction cell, it is necessary to remove it from the sensor housing. refer to
Section 11.6.6. for an overview of the entire sensor assembly. Use the following guide to
clean the reaction cell:
• Turn off the instrument power and vacuum pump. Refer to the Figure 9-6for the
following procedure.
• Disconnect the black 1/4" exhaust tube and the 1/8" sample and ozone air tubes
from the reaction cell. Disconnect the heater/thermistor cable.
• Remove four screws holding the reaction cell to the PMT housing and lift the cell and
manifold out as shown in the inset of Figure 9-6.
• The reaction cell will separate into two halves, the stainless steel manifold assembly
and the black plastic reaction cell with window, stainless steel cylinder and O-rings.
• The reaction cell (both plastic part and stainless steel cylinder) and optical glass
filter should be cleaned with methanol and a clean tissue and dried thereafter.
• Usually it is not necessary to clean the sample and ozone flow orifices since they are
protected by sintered filters. If tests show that cleaning is necessary, refer to
Section 9.3.10 on how to clean the critical flow orifice.
• Do not remove the sample and ozone nozzles. They are Teflon threaded and require
a special tool for reassembly. If necessary, the manifold with nozzles attached can
be cleaned in an ultrasonic bath.
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Figure 9-6: Reaction Cell Assembly

Model 200E Instruction Manual
044100102 Rev A