DeWalt Comprehensive Guide to Laser Distance Measurement Tools

5.Aim the LDM at the third desired target and press the DIST (ON) button (E) once to record the third distance.

6.The calculated volume is displayed in the main reading line (S). The third measurement is displayed in the additional reading line (P).

NOTE: The final measurement is displayed as cubic feet or cubic meters.

LASER MAINTENANCE

•Under some conditions, the lens of FIG. 9 the laser emitter and the receiver

may collect some dirt or debris. This will affect beam quality and operating range. The lens should be cleaned with a cotton swab moistened with water as shown in Figure 9.

WARNING: DO NOT turn the LDM on while cleaning the lens. Serious eye injury may result from staring at the beam.

•The housing can be cleaned with a wet lint-free cloth such as a cotton cloth. USE WATER ONLY — DO NOT use cleansers or solvents. Allow the LDM to air dry before storing.

•To maintain the accuracy of your readings, perform control measurements periodically. Refer to Field Calibration

Check.

•If your LDM requires repair, contact your local DEWALT service center.

•When the LDM is not in use, store it in the pouch provided.

•Do not store your LDM in the pouch if it is wet. Dry exterior parts with a soft, dry cloth and allow the LDM to air dry.

•Do not store your LDM at temperatures below 20˚F (–7˚C) or above 160˚F (70˚C).

CAUTION: Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the laser. These chemicals may

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weaken the materials used in these parts. Use a cloth dampened only with water and mild soap. Never let any liquid get inside the unit; never immerse any part of the unit into a liquid. Never use compressed air to clean the laser.

Field Calibration Check

Measure a known distance [within a 10–30' (3–10 m) range] with the LDM to confirm that the LDM is functioning properly.

Troubleshooting

If measurement conditions do not permit an accurate measurement, an error code will appear on the LCD display. For an error code description refer to the following table.

Code	Description	Correction
204	Calculation error	Repeat the measurement
252	LDM too hot	Let the LDM cool down
253	LDM too cold	Warm the LDM up
255	Weak signal	Change the target
		surface (e.g., put white paper
		on glass door)
256	Incorrect reading	Change the target
		surface (e.g., put white
		paper on glass door)
257	Too much	Shadow the
	background light	target area
258	Outside of range	Stay within the working range
260	Laser beam	Repeat the
	interrupted	measurement

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