Download Model 42i-LS - User Manual

Servicing
NO2-to-NO Converter Replacement
reaction chamber and the quartz window. To clean these surfaces use
cotton swabs and methanol.
6. To continue removing rear of reaction chamber remove the three socket
head screws holding it to cooler, being careful to keep quartz window
and red filter in cooler body.
7. To reinstall reaction chamber, follow previous steps in reverse, making
sure to backfill the cooler with dry air or nitrogen prior to installing
reaction chamber.
8. Re-install the measurement bench. Refer to “Removing the
Measurement Bench and Lowering the Partition Panel” in this chapter.
NO2-to-NO Converter
Replacement
Use the following procedure to replace the converter (Figure 7-12).
Equipment Required:
NO2-to-NO Converter
Wrench, 7/16-inch
Wrench, 9/16-inch
Wrench, 1/2-inch
Wrench, 5/8-inch
Screwdriver
Nut driver, 1/4-inch
Nut driver, 5/16-inch
CAUTION Avoid contact with converter heated components. Allow
converter to cool to room temperature before handling converter
components. Thermo Fisher Scientific
Model 42i Low Source Instruction Manual
7-21