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4. To replace the push-buttons and Window Housing Assembly:
4-34 | 241CE II Hydrocarbon Dewpoint Analyzer
a. Remove all of the M10 screws that secure the enclosure door (analyzer
housing) to its housing and open the door.
b. Take appropriate precautions to avoid causing electrostatic damage to
the circuit board. Remove the six (6) screws that secure the circuit board
to the enclosure door.
Remove the board and carefully allow the board to hang by its wiring
inside the Electronics Enclosure.
c. Remove the two (2) M4 x 16 screws that secure the Push-Button Retainer
to the enclosure door.
When removing the Push-Button Retainer, tilt it upward slightly to ensure
the Return Springs remain in the retainer when it is removed. These parts
can be re-used if they are not damaged.
Remove the Push-Button Actuators from the analyzer housing. Clean the
holes in the analyzer housing.
d. Insert one (1) new Push-Button into each push-button hole in the analyzer
housing. Place one (1) spring into the end of each push-button.
Align the holes in the Push-Button Retainer with the four push-buttons/
springs and slowly place it over the push-buttons/springs, making sure
they are properly enclosed in the retainer.
Replace the two (2) M4 x 16 screws that secure the Push-Button Retainer
to the enclosure door. Alternate turns on each screw while observing the
springs to ensure they do not bind as you tighten the retainer. Tighten
the screws only until they are snug. Do not overtighten them.
e. Take appropriate precautions to avoid causing electrostatic damage to
the circuit board and position the circuit board in its original mounting
location. Remove the six (6) screws that secure the circuit board to the
enclosure door. Tighten the screws only until they are snug. Do not
overtighten them.
f.
Close the enclosure door and replace all of the M10 screws that secure
the door to the Electronics Enclosure. The torque specification to fasten
M10 screws is 9.0 Nm, ±0.7 Nm (80 in.-lb, ±9 in.-lb).
PN 903-8797, Rev A
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Troubleshooting
