Yokogawa Multi Channel Oxygen Analyzer System ZR22/AV550G - Manual (Page 201)

IM 11M12D01-01E 11-7
11. Inspection and Maintenance
11.3.4 Replacement of the Heater Unit
This section describes the replacement procedure for the heater unit.
The sensor or ceramic heater-furnace core internal structure is subject to fracturing, so
do NOT subject it to strong vibrations or shock. Additionally, the heater unit reaches
high temperatures and is subjected to high voltages. So, maintenance services should be
performed after the power is off and the heater unit temperature has returned to normal
room temperature.
For details, refer to IM11M12A01-21E " Heater Assembly ".
Note
If the heater strut assembly can not be removed because a screw has fused to its thread,
one of our service representatives can fix it.