Triplett LD70 User manual

Laser Distance Meter
LD70 User Manual
Triplett Test Equipment & Tools
850 Perimeter Rd. Manchester, NH 03103

Contents
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7
11
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Introduction
This meter measures distance up to 70m (229.6’) and calculates Area,
Volume, and Indirect readings using the Pythagorean Theorem (a2+b2=c2). It
also includes a laser pointer, tripod mount and 20 point historical data group
function. Please visit www.triplett.com for the latest version of this User Guide,
Product Updates, and Customer Support.
Safety Instructions
This meter has been designed for safe use,
but must be operated with caution.
Laser classification (Class 2)
The meter produces a visible Class 2 laser beam
from the top of the instrument.
WARNING: Do not directly view or point the laser at an eye. Do not
look directly into the beam using an optical aid such as binoculars. This can
create a hazard. Low power visible lasers do not normally present a hazard,
but may present some potential for hazard if viewed directly for extended
periods of time.
Please read all safety instructions carefully before using this instrument
Do not use this device in flammable or explosive environments
Do not use this device near aircraft or medical equipment
Do not use this device near strong electro-magnetic interference Do not
aim the meter directly into sunlight
Do not dis-assemble or modify the instrument
Do not store in areas of high temperature/humidity
Remove the batteries when storing the instrument for long periods
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Product introduction
Safety instructions
Description of display interface
Keypad description
Initial operation and setting
Measurement
Measurement condition
Product maintenance
Failure prompt
Technical parameters
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Display Description Keypad description
Laser indication
The reference edge of measurement
(Pythagorean Theorem)
Indirect measurement
Setting-out measurement
Area/volume measurement
Length measurement
Battery level indication
Stored data indication
Angle indication
Signal strength Indication
Auxiliary display area
Main display area
1. Power on/measurement key
2. Area/volume key
3. Indirect measurement key
4. “+” Key
5. Historical record key
6. “-” Key
7. Reference edge key
8. Clear/power off key
9. Unit key
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LIMITED WARRANTY
The manufacturer warrants to the original consumer that this product is in good
working order for a period of one year from the date of manufacture or the date
of purchase. During This period, the product will be repaired or replaced without
charge for either parts or labor. Repair or replacement as provided under this
warranty is the exclusive remedy of the Purchaser.

Initial operation and setting
1. Install/replace the battery
◆Open the battery cover.
◆Install two battery AAA batteries provided by the manufacturer; it is
suggested to use alkaline battery in the future); pay attention to the
polarity and don’t install reversely.
◆Put the battery cover in place
2. Power on
Hold down 【】key for about 2 seconds to power on and enter the
length (distance) measurement mode automatically.
3. Power off
Manual power off: hold down 【 】key to power off at any mode.
Automatic power-off: the instrument will power off automatically if there is no
key operation within 46 seconds.
4. Clearing functions
Press 【】key to cancel the last instruction or clear the display.
5. Setting of the reference edge
The default reference edge of the instrument is back side. And the
measurement starting point is the tail end. If the reference edge is set as front
edge, the measurement starting point is the top of the instrument.
Press 【】key to select reference edge: back side/front edge/
positioning hole. The reference edge returns to the default state (back edge)
after powering on the instrument again.
6. Setting of function menu
At the power-off state, hold down 【】for about 5 seconds to enter
setting state and set laser, data calibration, buzzer.
Back edge
The positioning hole of the tripod on the
back of the instrument body is the benchmark.
Front edge
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Unit
Measurement
1. Single measurement
In the length measurement mode, press 【】key to open the laser.
After the laser aims at the object, press【 】key to carry out measure-
ment. The measurement result is displayed at main display area. The
auxiliary display area displays the distanced measured last time.
2. Continuous measurement
The continuous measurement function may enable users to start from one
measurement point and find a distance point or measure the minimum or
maximum distance. For example, measure the diagonal distance (maximum
value) or vertical distance (minimum value) of a room.
In the length measurement mode, hold down 【】key to enter the
continuous measurement mode and the buzzer sounds. The auxiliary display
area on the screen displays the measured maximum value (MAX) and
minimum value (MIN). The main display area displays the currently measured
distance. Press [ ] key to exit from the continuous measurement mode.
3. Area measurement
Press 【】key once and the screen displays . The edge to be
measured flashes to prompt. Press 【】key to complete measure-
ment of length and width respectively and the instrument calculates the area
automatically.
4. Volume measurement
Press 【】key twice and the screen displays . The edge to be
measured flashes to prompt. Press 【 】key to complete measurement
of length and width and height respectively and the instrument calculates the
volume automatically.
7. Check historical record
The instrument saves 20 groups of latest data automatically. The new data
overwrites the old data in proper order. In the length measurement mode,
press 【】key to enter historical record mode. Press 【 】and
【 】key to check the data. Press 【】to exit.
8. Unit setting
Press[ ] key to switch the unit.
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The operating method is as follows:
In the interface, press 【 】key to set the laser (the
laser symbol on top left of the screen displays or
disappears).
The laser symbol appears: indicate that the laser will open
automatically after powering on.
The laser symbol disappears: indicate that the laser will not
open automatically after powering on.
Hold down【 】key for about 2 seconds and it enters data calibration
interface. press 【 】key to adjust the parameters from -7mm to+7mm.
Hold down 【】key for 2 seconds to exit from the setting
state.
Hold down【】key for about
2 seconds and it enters buzzer
setting interface. press 【】
key to select on or off.
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↑
↓
X
c
b
a
a
b
c
d
5. Accumulation/ subtraction function
For measurement of distance, area and volume, accumulation/subtraction
operation may be conducted through operation of addition and subtraction.
Press [ ] key to carry out additive operation and press [ ] key to
carry out subtraction.
Accumulation/ subtraction of distance: At the length measurement mode,
press [ ]key to measure and obtain a distance. For additive operation,
press [ ] key and the left side of the screen displays “+” (for
subtraction, press [ ] key and the left side of the screen displays “-”).
Press [ ] key again to measure the distance to be added (it is to
subtract for subtraction). The result of accumulation (or subtraction) is
displayed on the main display area.
Accumulation/ subtraction of area/volume: At the area/volume measurement
mode, carry out the measurement to obtain an area/volume. For additive
operation, press [ ] key and the left side of the screen displays “+” (for
subtraction, press [ ] key and the left side of the screen displays “-”).
Continue to press [ ] key to measure and obtain the area/volume to
be added (it is to subtract for subtraction). At last, press [ ] key again,
the result of accumulation (or subtraction) is displayed on the main display
area.
6. Indirect measurement with Pythagorean Theorem
(1). As illustrated in following figure, measure the bottom edge and
hypotenuse to calculate the height of the triangle.
At the length measurement mode, press [ ] once and the screen
displays . The edge to be measured flashes to prompt. Press
[ ] key to complete measurement of hypotenuse c and right-angle
side b of a triangle. The instrument calculates the height of the triangle
automatically (edge a).
Note: when the bottom edge b of a triangle is measured, keep instrument
horizontal as possible.
(2). As illustrated in following figure, measure hypotenuse a, hypotenuse c
and common right-angle edge b of a triangle to calculate the length of edge d
of the triangle.
At the length measurement mode, press [ ] key twice and the screen
displays . The edge to be measured flashes to prompt. Press
[ ] key to complete measurement of hypotenuse a, hypotenuse c and
common right-angle side b of a triangle. The instrument calculates the length
of edge d of the triangle automatically.
Note: when the common right-angle side b of a triangle is measured, keep the
instrument horizontal as possible.
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(3). As illustrated in following figure, measure hypotenuse a, hypotenuse b
and common right-angle edge c of a triangle to calculate the length of edge d
of the triangle.
In the length measurement mode, press [ ] key three times and the
screen displays . The edge to be measured flashes to prompt. Press
【 】key to complete measurement of hypotenuse a, hypotenuse b
and common right-angle side c of a triangle. The instrument calculates the
length of edge d of the triangle automatically.
Note: when the common right-angle side c of a triangle is measured, keep the
instrument horizontal as possible.
7. Angle measurement function
The angle and length of the hypotenuse are known, calculate the length of
right-angle side a and b.
Measurement condition
The measurement result will have large error under the condition of extremely
strong sunshine, large fluctuation of temperature, weak reflection of reflector,
etc. The effect will be better if objective reflect sheet is used under such
condition.
When the measured objects are colorless liquid (such as water), clean glass,
etc or objects with transparent surfaces, mistaken measurement may take
place. When the measured objects can reflect light strongly, the laser may be
reflected. Accordingly, mistaken measurement may take place. When surface
without reflection or very dark surface is measured, the measurement time is
increased or error may be reported. Under such condition, the objective
reflector sheet is used together.
Product maintenance
Don’t place the instrument at a high temperature and high humidity
environment for storage. Please take out the battery if it is out of use for a
long time to avoid corrosion to the instrument by battery leakage.
Please keep the instrument clean. Use soft and wet cloth to wipe the
instrument shell. Please use cleanser for optical lens to wipe sensor lens and
screen. Don’t use corrosive cleansers.
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a
b
c
d
Angle indication
a
b
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Measurement accuracy ±(3.0mm+5*10-5*D)
Measurement unit Feet, inch and meter
Laser grade Grade Ⅱ
Laser parameters 620-670nm，＜1mW
Continuous measurement
Addition/subtraction measurement:
Area/volume measurement
Measurement with Pythagorean Theorem
Maximum/minimum value measurement
Angle measurement
Historical measurement record
Setting-out function
Calibration function
Multiline display
Buzzing prompt
Operation temperature 0～40℃
Storage temperature -20～60℃
Power supply 2 AAA. 1.5V alkaline batteries
Laser automatic off 1 minute
Automatic power off 3 minutes
Size 112.3mm×51.6mm×28.8mm
Failure prompt
Code hint
Er.b.L
Er.b.H
Er.t.L
Er.t.H
Er.d.H
Er.d.E
Er.L.H
Er.S.L
Er.S.H
Product type
Measurement range
Weight
Causes
The battery voltage
is too low.
The battery voltage
is too high.
The temperature
is too low.
The temperature
is too high.
Data overflow
Data error
Ambient light
is too strong
Too weak
signal
Too strong signal
Code hint
Er.H.F
Er.A.L
Er.A.H
Er.A.d
Er.F.E
Er.R o
Er.U.L
Er.U.H
Causes
Hardware error
Internal error
Internal error
Internal error
Storage error
Excessive fluctuation
Hardware error
(the internal voltage is low)
Hardware error
(the internal voltage is high)
Technical parameters
HT-191
0.05～70M
100g (battery not included)
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