A SERVICE OF

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1. INTRODUCTION
No. 99MCA094A
1-3
1.3.3 Replacing the protective glass and the condenser lens
Follow the procedures below to remove the protective glass for replacement or cleaning.
To replace the protective glass, first turn off the power switch, then disconnect the signal
cable for safety.
Model LSM-501S/LSM-503S/LSM-506S/LSM-512S/LSM-516S
Removing steps Unscrew the screws that secure the protective glass.
Remove the protective glass and the rubber packing.
Remounting steps Remount the protective glass by reversing the steps above.
NOTE Dust will enter the enclosure if the protective glass is not re-installed. In a
humid environment damp air will enter the enclosure, causing reduced
optical clarity. So, ensure that the work is done in an air-conditioned room
that is free from dust.
Model LSM-500S
Removing steps Remove the protective glass and the condenser lens by rotating them
counterclockwise.
Remove the O-ring.
Remounting steps
Attach the O-ring.
Mount the protective glass and the condenser lens in place by rotating them
clockwise, as shown below. If mounted in the wrong order, measurement
cannot be taken.
NOTE Dust will enter the enclosure if the protective glass is not re-installed. In a
humid environment damp air will enter the enclosure, causing reduced
optical clarity. So, ensure that the work is done in an air-conditioned room
that is free from dust.
Protective glass
Condenser lens