Teledyne T101, Operation Manual, Page: 211 / 375

Teledyne ML – T101 Operation Manual Instrument Maintenance
207
Converter Efficiency = 490.3 ÷ 499.1
Converter Efficiency = 0.982 (98.2%)
10. It is recommended that the H
2
S

SO
2
converter catalyst material be
replaced if the converter efficiency falls below 96% or whatever efficiency
rating is specified by local regulatory requirements.
8.3.5.3. Changing the H
2
S

SO
2
Converter Catalyst Material
The H
2
S

SO
2
converter is located in the center of the instrument, see Figure 3-5 for
location, and Figure 8-3 for the assembly. The converter is designed for replacement of
the cartridge only; the heater with built-in thermocouple can be reused.
• Turn off the analyzer power, remove the cover and allow the converter to
cool.
•
Remove the top lid of the converter as well as the top layers of the
insulation until the converter cartridge can be seen.
CAUTION
The converter operates at 315º C. Severe burns can result if the
assembly is not allowed to cool. Do not handle the assembly until it is at
room temperature. This may take several hours.
•
Remove the tube fittings from the converter.
•
Disconnect the power and the thermocouple of the converter. Unscrew
the grounding clamp of the power leads with a Phillips-head screw driver.
•
Remove the converter assembly (cartridge and band heater) from the
can. Make a note of the orientation of the tubes relative to the heater
cartridge.
• Unscrew the band heater and loosen it, take out the old converter
cartridge.