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8. MAINTENANCE AND CARE
1. Handle instrument with great care. Avoid shock
and vibration. Always store and transport
instrument in its carrying case.
2. Keep instrument dry and clean after use and be-
fore packing it in the carrying case.
3. Check and calibrate the instrument regularly to
maintain accuracy.
4. Keep the lens of the laser aperture clean. Use
soft cloth and glass cleaner to clean it.