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TROUBLESHOOTING & REPAIR M102E/M501 TRS
(Addendum to M101E Manual - P/N 04740 Rev A)
2. Allow it to cool to room temperature. This may take up to 30 minutes.
3. Remove the instruments top cover (see Section 3.2 of this addendum)
4. Remove the four screws holding the converter cover in place.
5. Carefully lift the converter cover away.
6. Loosen front and rear pneumatic fittings at each end of the tube and remove the gas lines
from the converter tube.
7. Remove the front ceramic bobbin from the converter tube. The thermistor assembly will come
with it.
NOTE:
Be Careful!
The ceramic bobbins at each end of the heater assembly are fragile.
8. Slide a new tube into the heater coil assembly.
9. Make sure that the thermistor is threaded through its notch on the center hole of the front
converter bobbin and properly seated in the corresponding indentation in the body of the
quartz heater tube.
10. Reattach the front bobbin onto the converter tube.
11. Reattach the gas lines and retighten the pneumatic fittings.
12. Reassemble the converter cover and reattach the M501-TRS top cover.
NOTE
The M501-TRS will not operate properly with the top cover removed.
The air cooling required to stabilize the temperature of the converter tube is dependent
on air flow patterns that only exist with the top cover in place.
Without the top cover in place, the thermal cutout may overheat, and shut the heating
element off.
13. Restart the M501-TRS.
14. Check the converter efficiency. See Section 10.4.2 of this addendum.
10.6. Manually Programming the M501-TRS
Temperature Controller
NOTE
The temperature controller has been programmed at the factory and should not be
altered, (except for temperature set point).
64 05514 Rev A1