4-2
4.2 ROUTINE MAINTENANCE
• Do not touch the optical elements, such as the cover glass, with your
fingers. Keep them clean. Accuracy of the reading may be adversely
affected by dust or dirt.
• Keep the dust cover over the instrument when the instrument is not in
immediate use.
• Use a dry cloth to clean the cover, screen and the front panel. Use
diluted non-organic detergents for any heavy stains. Do not use organic
solvents, such as thinners, which may cause damage to the surface of
the instrument.
• Disconnect the power cord if you do not plan to use the instrument for a
long time.
4.2.1 CLEANING COVER GLASS
Clean the cover glass periodically.
1) Remove the nose piece.
2) Clean the cover glass as follows:
Remove the dust on the cover glass using a blower (i.e., compressed
air). If the dirt still remains, gently wipe it off using a soft cloth or lens
cleaning accessories.
4.2 ROUTINE MAINTENANCE
• Scratches on the cover glass may result in inaccurate
readings.
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