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< 11. Inspection and Maintenance >
11-1
IM 11M12D01-01E
11. Inspection and Maintenance
This chapter describes the inspection and maintenance procedures that are performed to maintain
reliable performance of the AV550G Averaging Converter and to keep it in good operating condition.
The procedure for adding channel cards is also explained in this chapter.
WARNING
Do NOT touch the probe if it has been in operation immediately just before being checked. (The
sensor at the tip of the probe heats up to 750°C during operation. If you touch it, you will get burned.)
CAUTION
When checking the detector, carefully observe the following:
(1) Do not subject the probe to shock or cool it rapidly.
The sensor is made of ceramic (zirconia). If the detector is dropped or bumped into something,
the sensor may be damaged and no longer work.
(2) Do not reuse a metal O-ring to seal the cell assembly. If you replace the cell or remove it from
the probe for checking, be sure to replace the metal O-ring. Otherwise, the furnace gas may
leak, and then the leaking corrosive gas will cause the built-in heater or thermocouple to go open
circuit, or the detector may corrode.
(3) Handle the probe with care so that the dust-filter mounted screws on the tip of the probe do not
hurt your finger(s).
(4) Before opening or closing the terminal box, first remove dust, sand, or the like from the terminal
box cover.
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