General LDM60 User Manual
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General LDM60 User Manual

Laser distance meter 200 ft. (60m)
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LASER DISTANCE METER
200 FT. (60m)
USER'S MANUAL
LDM60
Please read this manual carefully and thoroughly before using this product.

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  • Page 1 LASER DISTANCE METER 200 FT. (60m) USER’S MANUAL LDM60 Please read this manual carefully and thoroughly before using this product.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Introduction ......3 – 5 Key Features ....... . 6 What’s in the Box .

  • Page 3: Introduction

    This time is proportional to the distance to the target. The LDM60’s range of approximately 200 ft. (60m) makes it suitable for most indoor measuring tasks and many outdoor jobs as well.
  • Page 4 What’s more, it’s much easier to read the LDM60’s digital display, which can be held at eye level, than to read a tape measure that needs to be held in a measuring position that makes reading tiny hash marks difficult.

  • Page 5: Key Features

    LDM60 can use triangulation to measure the height of a tree or a building without anyone needing to climb it, or the width of a river without anyone needing to cross it. • It’s safer. Because the LDM60 can measure distance from a distance, it takes the risk out of routine but tricky tasks.

  • Page 6: What's In The Box

    WHAT’S IN THE BOX The LDM60 comes in a box along with: • A holster (soft pouch with a belt loop) • Two “AAA” Alkaline batteries • A small Phillips-head screwdriver for opening the battery compartment • This user’s manual PRODUCT OVERVIEW Fig.
  • Page 7 MEAS Fig. 1 9. Dual function button: Chooses any of four distance units Turns display backlight on and off 10. Triple function button: Powers meters off Clears last measurement or cancels last action Clears (resets to zero) stored measure ment/calculation values one at a time, starting with the oldest value...
  • Page 8 Fig. 2. The LDM60’s display indications and icons 1. Measurements referenced from front edge of meter 2. Flashes when laser is on 3. Measurements referenced from rear edge of meter 4. Operating in Direct or Continuous Measurement Mode 5. Operating error indication 6–10.
  • Page 9 11 12 11 12 ➤ 6 7 8 9 10 6,7,8,9,10 Fig. 2...

  • Page 10: Safety Instructions

    SETUP INSTRUCTIONS INSTALL BATTERIES The LDM60 is ready to use after you install the two supplied “AAA” batteries in a compartment in the back of the meter. To open the compartment, use the small supplied Phillips-head screwdriver to loosen the single screw holding the battery compartment cover in place.

  • Page 11: Quick Start Instructions

    While the meter is powered on, any push of any button produces a beep to confirm that some action has taken place (a measurement was made, an operating mode or measurement unit was changed, etc.). The only actions that are not accompanied by a beep are the laser timing out (after 30 seconds of inactivity) for safety reasons and the backlight timing out (after 1 minute of inactivity) to conserve battery charge.

  • Page 12: Choosing A Measurement Reference

    CHOOSING A MEASUREMENT REFERENCE The LDM60 can reference its measurements from the front edge of the meter or the rear edge. For most distance measurements, choosing the rear edge as the reference produces more-accurate readings. Doing so allows you to hold the bottom of the meter horizontally against one wall of a room, or vertically against the floor, and send the laser beam out the top of the unit toward the opposite wall or the ceiling.

  • Page 13: Clearing The Display/Cancelling An Action

    (see pp. 24 and 25) in chronological order, oldest first CHANGING THE MEASUREMENT UNIT The LDM60’s default distance measurement unit is meters, expressed as m. The default area measurement unit is square meters, expressed as m .

  • Page 14: Measuring Distances

    MEASURING DISTANCES Direct Measurements To measure the distance to a target: 1. Power on the meter and select a measurement unit, an appropriate measurement reference (in most cases, the rear of the meter) and an appropriate backlight state (on for indoor work, off for outdoor work).

  • Page 15: Continuous Distance Measurement (Distance Tracking)

    Fig. 4. A direct distance measurement of 5 feet, 1 and 15/16 inches ➤ In direct distance measurement mode, you can display up to four consecutive measurements in the order in which they 5’01” were made. Fig. 5 is a screen shot which shows the values of four direct distance measurements made in top-to-bottom order.
  • Page 16 the wall. The icon will appear on the display and the meter ➤ will sound two beeps and begin to measure the distance from the meter to the wall twice per second. Each measurement will cause the beeper to sound, and the measurements will be shown and continuously updated on the bottom line of the display.

  • Page 17: Adding And Subtracting Distances

    Adding and Subtracting Distances The LDM60 has two front-panel buttons that make it easy to add or subtract a distance measurement from an existing measurement, in effect turning the earlier measurement into a baseline. This addition/subtraction function comes in handy when accumulating multiple distance measurements.

  • Page 18: Indirect Measurements Of Height Or Length Using Triangulation

    Indirect Measurements of Height or Length using Triangulation The LDM60 can use triangulation (one type of indirect measurement based on Pythagorean geometry) to calculate the height or length of an object from a distance. The meter can perform two kinds of calculations: •...
  • Page 19 perpendicular to “B”—one of the distances you can measure. The meter can measure “B” as well as the distance to the top of the building (“C” in the figure), which is the hypotenuse of the right triangle. Once the meter has determined the values of “B”...
  • Page 20 B1/B2 Fig. 9. Triangulating a height using three inputs A=A1+A2 To measure the height of an object using triangulation with two inputs: 1. First make sure that the line of sight from the meter to the bottom of the object forms a right angle. 2.
  • Page 21 7.687 Fig. 10. A two-input indirect measurement of the 5.846 height of a tree standing 4.990 4.990 meters tall To measure the height of an object using triangulation with three inputs: 1. Use the button to choose the front edge of the meter as the measurement reference.

  • Page 22: Measuring Areas

    14.27 ft. tall 14.27 MEASURING AREAS The LDM60 can calculate the area of a square or rectangular room or space by measuring its length and width and multiplying the two values. To measure an area: 1. Make sure the meter is using its rear edge as the measurement reference and that the laser is on.

  • Page 23: Measuring Volumes

    9 06 6 and 1/2 inches 155.65 MEASURING VOLUMES The LDM60 can calculate the volume of a square or rectangular room or space by measuring its height, depth and width and multiplying the three values. To measure a volume: 1. Make sure the meter is using its rear edge as the measurement reference and that the laser is on.

  • Page 24: Recalling And Clearing Stored

    58.582 RECALLING AND CLEARING STORED MEASUREMENTS/CALCULATIONS The LDM60 automatically stores its last 20 measurements or calculations and retains them in memory after being powered off. The records also are unaffected by a battery discharge or battery change. Once the memory is full, the next measurement or calculation overwrites the oldest record in a first in-first out (FIFO) scheme.
  • Page 25 To recall a record, press the button. The value of the first (most recent) measurement or calculation will appear on the bottom line, and a “1” will appear over the icon near the top of the display, below the battery icon. Use the + and — buttons to navigate to the desired record number (Fig.

  • Page 26: Specifications

    SPECIFICATIONS Measurement Range (indoor) 0.33 to 197 ft. (0.1 to 60m) Measurement Accuracy ±1/16 in. (±1.5mm) Resolution Display Unit Options meters (default) + fractional inches, inches, feet + decimal inches Response Time 2 seconds, max Laser Type, Wavelength, Power Class 2M II, 635nm, < 1mW Operating Modes Direct Distance Measurement, Distance Addition/Subtraction,...

  • Page 27: Operating & Maintenance Tips

    OPERATING & MAINTENANCE TIPS Because the laser silently auto powers off after 30 seconds of inactivity while the meter remains powered on, you’ll often find that when you press the button expecting to make a MEAS measurement, all you have done is reactivate the laser. In this case, you have to press the button a second time to take a reading.
  • Page 28 The following errors can be corrected: Code Cause Corrective Measures Info 204 Calculation error Repeat the measurement(s) Info 208/252 Temperature too high Cool down the meter Info 220 Low battery Change batteries Info 253 Temperature too low Warm up the meter Info 255 Received signal too weak/ Use white target plate...

  • Page 29: Warranty Information

    Acceptance of the exclusive repair and replacement remedies described herein is a condition of the contract for purchase of this product. In no event shall General be liable for any incidental, special, consequential or punitive damages, or for any cost, attorneys’...

  • Page 30: Return For Repair Policy

    Customer Service to obtain an RGA (Return Goods Authorization) number before forwarding the unit via prepaid freight to the attention of our Service Center at this address: General Tools & Instruments 80 White Street New York, NY 10013 212-431-6100...
  • Page 31 NOTES ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________...
  • Page 32 New York, NY 10013-3567 PHONE (212) 431-6100 FAX (212) 431-6499 TOLL FREE (800) 697-8665 e-mail: sales@generaltools.com www.generaltools.com LDM60 User’s Manual Specifications subject to change without notice ©2014 GENERAL TOOLS & INSTRUMENTS NOTICE - WE ARE NOT RESPONSIBLE FOR TYPOGRAPHICAL ERRORS. MAN# LDM60 2/19/14...

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