2955i_Manuals 6/4/18 10:37 AM Page 1 150′ Laser Distance Meter Model No. LDM150 Instruction Manual Congratulations on your choice of this Laser Distance Meter. We suggest you read this instruction manual thoroughly before using the instrument and save this instruction manual for future use. This is a Class II laser tool and is manufactured to comply with CRF 21, parts 1040.10 and 1040.11 as well as international safety rule IEC 285.
955i_Manuals 6/4/18 10:37 AM Page 2 Table of Contents 1. Kit Contents 2. Features and Functions 3. Safety Instructions 4. Location/Content of Warning Labels 5. Location of Parts/Components 6. Battery Installation 7. Operating Instructions 8. 9. 10. 11. 12. 13. 14. Tips from the Pros Care and Handling Troubleshooting Guide Technical Specifications Product Warranty Warranty Registration Accessories 1.
2955i_Manuals 6/4/18 10:37 AM Page 3 2. Features and Functions • Four (4) measurement modes: Length (Single or Continuous), Area, Volume and 2-Point Pythagoras • Displays in English or metric units with decimals or fractions (English units only) • ISO 16331-1 tested* to typical accuracy of +/- 1/16″ (0.0625″, or 1.
2955i_Manuals 6/4/18 10:37 AM Page 4 3. Safety Instructions Please read and understand all of the following instructions, prior to using this tool. Failure to do so, may void the warranty. DANGER! Class II Laser Product Max. Power Output: ≤ 1mW Wavelength: 640-660nm THIS TOOL EMITS LASER RADIATION. DO NOT STARE INTO BEAM. AVOID DIRECT EYE EXPOSURE. ATTENTION IMPORTANT • Read all instructions prior to operating this laser tool. Do not remove any labels from tool.
2955i_Manuals 6/4/18 10:37 AM Page 5 4. Location/Content of Warning Labels Error Code Label The LDM may return an error code during use, as indicated by the display showing “ERR X,” where “X” represents a number from 1 to 6. The error codes are as follows: 1. Laser Range – The measurement distance is outside the range listed in the specifications. 2. Weak Signal – The reflected laser signal is too weak, either due to high ambient lighting at the target or poor target reflectivity. 3.
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2955i_Manuals 6/4/18 10:37 AM Page 7 LCD Screen Not all features found on the LCD screen are found in every Johnson Level & Tool Laser Distance Meter. See the notes below for further information. 1. Measurement Reference Position 2. Measuring Mode 3. Memory (recent measurements)* 4. Active Laser Indicator 5. Add and Subtract‡ 6. Maximum Display 7. Indirect Measuring Mode (Pythagoras Measurements)‡ 8. Minimum Display 9. Stake-out Direction Indicator† 10. Main Screen – Current Measurement 11.
2955i_Manuals 6/4/18 10:37 AM Page 8 6. Battery Installation To install batteries in the Laser Distance Meter: 1. Remove the battery cover by lifting the cover straight up from the bottom of the Laser Distance Meter as shown by the arrow in the image to the right. 2. Insert 2 “AAA” batteries into the battery compartment according to the polarity illustrated inside. 3. Replace the battery cover.
2955i_Manuals 6/4/18 10:37 AM Page 9 7. Operating Instructions IMPORTANT: It is the responsibility of the user to ensure proper maintenance of the Laser Distance Meter. Conduct periodic test measurements to ensure the instrument is measuring accurately and consistently. This is most important if the instrument has been exposed to extreme temperatures or moisture. Always confirm accuracy before and during important measurements. Keep the Laser Distance Meter optic lens clean and inspect for damage.
2955i_Manuals 6/4/18 10:37 AM Page 10 Volume Control The Laser Distance Meter has three volume settings: high, low and off. When the instrument is powered on, it will default to the most recently used volume setting. To change the volume setting, press and hold the button. The unit will cycle through the three settings (S1 = high, S-2 = low, Off = mute) until you release the button. Measuring Modes The Laser Distance Meter has 4 measuring modes.
2955i_Manuals 6/4/18 10:37 AM Page 11 Units of Measure The Laser Distance Meter has 7 units of measure. 1. Feet in decimal format (e.g., 11.48 ft) 2. Inches in decimal format (e.g., 137.83 in) 3. Feet and inches in 1/32″ (e.g., 11′5″ 27/32) 4. Inches in 1/32″ (e.g., 137″ 27/32) 5. Inches in 1/16″ (e.g., 137″ 7/8) 6. Inches in 1/8″ (e.g., 137″ 7/8) 7. Meters (e.g., 3.501 m) To select a unit of measure before making a measurement, press the button.
2955i_Manuals 6/4/18 10:37 AM Page 12 Measurement Reference Position Note: Setting the measurement reference correctly is critical to obtaining an accurate measurement, as it establishes the place where a reading of zero (0) is located. If the wrong reference position is selected, the measurement will be off by the length of the tool (4.14 inches/≈4 1/8″). The Laser Distance Meter has two reference positions for measurement, which establish the place where a reading of zero (0) is located.
2955i_Manuals 6/4/18 10:37 AM Page 13 Length Measurement Mode – Single 1. After turning on the instrument, it will default to the Length mode. If the mode has been changed and you wish to return to the Length mode, press the button until the measuring mode icon on the LCD screen disappears. 2. After selecting the desired unit of measure and reference position, aim the Laser Distance Meter so that the laser dot is on the selected target. 3. Keep your position stable and press the button. 4.
2955i_Manuals 6/4/18 10:37 AM Page 14 Area/Square Measurement Mode 1. Press the button once until the Area/Square mode icon ( ) displays near the top left of the LCD screen. 2. After selecting the desired unit of measure and reference position, aim the Laser Distance Meter so that the laser dot is on the selected target to measure the length (indicated by a “1” in the figure to the right). 3. Keep your position stable and press the button. The length measurement will appear above the main display. 4.
2955i_Manuals 6/4/18 10:37 AM Page 15 Volume/Cube Measurement Mode 1. Press the button two times until the Volume/Cube mode icon ( ) displays near the top left of the LCD screen. 2. After selecting the desired unit of measure and reference position, aim the Laser Distance Meter so that the laser dot is on the selected target to measure the length (indicated by a “1” in the figure to the right). 3. Keep your position stable and press the button. The length measurement will appear above the main display. 4.
2955i_Manuals 6/4/18 10:37 AM Page 16 2-Point Pythagoras Measurement Mode 2-Point Pythagoras measurement mode refers to a measurement mode based off the Pythagorean Theorem (A2 + B2 = C2). If you know 2 lengths (but not the third), this formula allows you to calculate a missing dimension of a triangle. The Laser Distance Meter uses this theorem to indirectly measure lengths that are otherwise not directly measureable, enhancing the utility of the tool.
2955i_Manuals 6/4/18 10:37 AM Page 17 4. Aim the Laser Distance Meter so that the laser dot is on the selected target to measure the length of the base (represented by “A” in the figure above). 5. Keep your position stable and press the button again. The hypotenuse and base length measurements will appear above the main screen. The indirect height will appear on the main screen (represented by “B” in the figure above). The laser will turn off. 6.
2955i_Manuals 6/4/18 10:37 AM Page 18 To subtract consecutive measurements, complete the following steps: 1. Complete your first measurement 2. Press the button. The first measurement will appear above the main display. 3. Complete your second measurement. The second measurement will appear above the main display, and the difference of the two measurements will appear in the main display. 4. Repeat step 3 above as necessary to subtract further measurements.
2955i_Manuals 6/4/18 10:37 AM Page 19 8. Tips from the Pros • Take more than one measurement in situations where accuracy is critical. • Take 3-4 measurements from the same position to compare the consistency of each reading. • To accurately measure objects lacking an inside corner from the rear of the instrument, use a scrap piece of drywall or other flat material to extend the corner. Butt the Laser Distance Meter up to the material (as shown).
2955i_Manuals 6/4/18 10:37 AM Page 20 9. Care and Handling •This Laser Distance Meter unit is a precision tool that must be handled with care. •Avoid exposing unit to shock vibrations and extreme temperatures. •Remove the batteries when storing the unit for an extended time (more than 3 months) to avoid damage to the unit should the batteries deteriorate. •Avoid getting the unit wet. •Keep the laser unit dry and clean, especially the laser output window. Remove any moisture or dirt with a soft, dry cloth.
2955i_Manuals 6/4/18 10:37 AM Page 21 10. Troubleshooting Guide This section is designed to help you diagnose and troubleshoot common problems that prevent the Laser Distance Meter from working properly. If the Laser Distance Meter returns an ERR code (display shows ERR plus a number from 1 to 6), please refer to Section 4 of this manual for possible resolutions.
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2955i_Manuals 6/4/18 10:37 AM Page 23 *Tested per ISO 16331-1. **Per ISO16331-1, unfavorable conditions are designed to simulate bright sunlight and give an approximate indication of the working range of the tool outdoors on a bright, sunny day. Overcast or darker days will offer a longer working range. 12. Product Warranty Johnson Level & Tool offers a two year limited warranty on each of its products.
2955i_Manuals 6/4/18 10:37 AM Page 24 13. Warranty Registration Please register within 30 days of purchase. Registering ensures we have your information on file for warranty service even if you lose your receipt, and lets us contact you if there is ever a product recall. We will never sell your information and only send you marketing information if you opt-in. To register, go to www.johnsonlevel.com/register. 14.
