Tarmo 311675 User manual

ko0421 311675
Laser Distance Meter • Lasertoiminen etäisyysmittari
Laseravståndsmätare • Laser-kaugusmõõdik
Lāzera tālmērs • Lazerinis tolimatis • Лазерный дальномер

EN Laser Distance Meter
1. Safety regulations
Please read all of the operational instructions and safety regulations in this
manual before operation. Inappropriate operation without complying with this
manual could cause damage to the device, influence the measurement result or
cause bodily injury to the user.
Do not attempt to disassemble or repair the meter in any way. It is
forbidden to make any modifications to the meter. Please keep it out of reach of
children.
It is strictly forbidden to aim the laser at someone’s eyes or other parts of
their body. Do not use the laser on highly reflective surfaces.
Because of electromagnetic radiation interference with other equipment
and devices, do not use the meter in an aeroplane or around medical equipment.
Laser level
•The laser beam is visible and emitted from the laser aperture next to the sensor
area. The laser pointer used in the tool is Class II and complies with IEC 60825-
1:2007.

EN Laser Distance Meter
1. Safety regulations
Please read all of the operational instructions and safety regulations in this
manual before operation. Inappropriate operation without complying with this
manual could cause damage to the device, influence the measurement result or
cause bodily injury to the user.
Do not attempt to disassemble or repair the meter in any way. It is
forbidden to make any modifications to the meter. Please keep it out of reach of
children.
It is strictly forbidden to aim the laser at someone’s eyes or other parts of
their body. Do not use the laser on highly reflective surfaces.
Because of electromagnetic radiation interference with other equipment
and devices, do not use the meter in an aeroplane or around medical equipment.
Laser level
•The laser beam is visible and emitted from the laser aperture next to the sensor
area. The laser pointer used in the tool is Class II and complies with IEC 60825-
1:2007.
•Do not look into the laser beam. Never aim the beam at any person or any object
other than the object you are measuring. Do not view the laser beam using optical
instruments such as eyepieces and telescopes. Avoid indirect exposure via
reflective surfaces, such as glass and mirrors.
2. Installation and replacement of batteries
•Remove the battery cover on the back of the device, insert batteries according
to the correct polarity, then reattach the battery cover.
•The batteries should be replaced when the battery power symbol on the LCD
shows that the battery power is low.
•Only 1.5 V AA alkaline batteries are compatible with this meter.
•Remove the batteries when not in use for a long time to avoid battery corrosion
of the meter’s body.
3. Features
•Measurement time: single measurement 0.3 seconds/measurement,
continuous measurement 7 times/second.
•The meter automatically stores the measured values and can record 10 groups
of data. All the stored values, including each single measurement and the final
calculated results, can be reviewed.
•You can add and subtract the stored measured values.

4. Specifications
Measuring accuracy ± 1.5 mm
Display accuracy 1 mm
Laser level Class II
Laser type 630–670 nm, < 1 mW
Area and volume measurement function √
Pythagorean theorem measurement function
√
Add and subtract measurements function √
Continuous measurement function √
MAX/MIN √
Multi-line backlit display
√
Dust and waterproof IP 54
Operating temperature range 0...+40 °C
Storage temperature range –20...+70 °C
Battery type 2 x 1.5 V AA (LR6)
Auto laser off 30 s
Auto power off
Approx. 80 seconds
Size 118 x 53 x 26 mm
Remarks: Measurement can reach 10m in good conditions (depending on the
measuring surface and room temperature, etc.). Under adverse measuring conditions,
such as the light being too strong or the temperature difference too large, deviations
will increase when measuring distances over 10m.
The measuring tool is supplied with a warning label. If the text on the warning label
is not in your language, glue the label with text in your language, which is included
in the packaging, over the original label before the first use.

5. LCD description
1. Laser emission on
2. Measurement starting point
3. Indirect measurement
4. Area and volume measurement
5. Store data / check stored data
6. Main measurement display
7. Measurement unit symbols
8. Auxiliary display
9. Battery power symbol
10. Device failure symbol
11. MAX/MIN symbols
12. Operation error symbol
6. Meter description
1. Sensor area
2. LCD display
3. Laser emission on (MEAS)
4. Spirit level
5. Measurement unit button (UNIT)
6. Pythagorean theorem indirect
measurement button
7. Delay button (TIMER)
8. Minus button (–)
9. Off/delete button (OFF/DEL)
4. Specifications
Measuring accuracy ± 1.5 mm
Display accuracy
1 mm
Laser level Class II
Laser type
630–670 nm, < 1 mW
Area and volume measurement function √
Pythagorean theorem measurement function
√
Add and subtract measurements function
√
Continuous measurement function √
MAX/MIN √
Multi-line backlit display
√
Dust and waterproof IP 54
Operating temperature range
0...+40 °C
Storage temperature range –20...+70 °C
Battery type
2 x 1.5 V AA (LR6)
Auto laser off 30 s
Auto power off
Approx. 80 seconds
Size 118 x 53 x 26 mm
Remarks: Measurement can reach 10m in good conditions (depending on the
measuring surface and room temperature, etc.). Under adverse measuring conditions,
such as the light being too strong or the temperature difference too large, deviations
will increase when measuring distances over 10m.

10. Storage button (M)
11. Area and volume measurement button
12. Plus button (+)
13. Measurement starting point select button
14. Tripod connection
15. Battery cover
7. Operation
7.1 Power on/off the meter
•To turn the meter on, hold the button and the display and laser will turn on
simultaneously, ready to measure.
•To turn the meter off, hold the button for 3 seconds. The meter will
automatically turn off after around 80 seconds of inactivity.
7.2 Measuring unit setting
Press the button to select the desired unit: m (metre), ft (feet) or in (inch).
7.3 Delay measurement
After the meter is powered on, press the button, and the measurement will
be delayed by 5 seconds.

7.4 Measurement starting point setting
Press the button to switch between the front and end measurement starting
point. The system usually takes the end measurement starting point as the default.
7.5 Single measurement and continuous measurement
•Press the button while in measuring mode and the meter will emit the
laser to the target measuring location. Re-press the button for a single
measurement of distance. The measured results will appear on the LCD display.
•Press the button for a long interval whilst in measuring mode to enter
continuous measurement. The maximum and minimum measured values during
continuous measurement will appear on the display. The current measured values
will appear on the main measurement display. Press the button again to exit
continuous measurement.
7.6 Area measurement
Press the button, and the rectangle icon with one edge flashing
will appear on the left-hand side of the display. Complete the following operations
according to the instructions:
1) Press the button to measure the first edge (length).
2) Press the button to measure the second edge (width). The area will be
calculated automatically by the meter and the results shown on the main measurement
display.
10. Storage button (M)
11. Area and volume measurement button
12. Plus button (+)
13. Measurement starting point select button
14. Tripod connection
15. Battery cover
7. Operation
7.1 Power on/off the meter
•To turn the meter on, hold the button and the display and laser will turn on
simultaneously, ready to measure.
•To turn the meter off, hold the button for 3 seconds. The meter will
automatically turn off after around 80 seconds of inactivity.
7.2 Measuring unit setting
Press the button to select the desired unit: m (metre), ft (feet) or in (inch).
7.3 Delay measurement
After the meter is powered on, press the button, and the measurement will
be delayed by 5 seconds.

then the other cathetus). It is recommended to attach the meter to a tripod to aid
measuring.
•Under the Pythagorean theorem measurement mode, length of the other cathetus
must be shorter than the hypotenuse length so that the instrument can make the
calculation, otherwise an error symbol will be displayed.
7.8.1 Indirect measurement to determine the distance of a cathetus by
measuring the hypotenuse edge and the other cathetus
1) Press the button, and the triangle icon with the hypotenuse edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the hypotenuse line (1)
according to the display prompt.
3) Press the button to measure the length of the bottom line (2).
4) The length of the dotted line will be calculated automatically by the meter and will
appear on the main measurement display.
3) Press the button again to remove the previous measured result and to exit
area measurement.
7.7 Volume measurement
Double press the button, and the cube icon with one edge flashing
will appear on the left-hand side of the display. Complete the following operations
according to the instructions:
1) Press the button to measure the first edge (length).
2) Press the button to measure the second edge (width).
3) Press the button to measure the third edge (height). The volume will be
calculated automatically by the meter and the results shown on the main measurement
display.
4) Press the button again to remove the previous measured result and to exit
volume measurement.
7.8 Pythagorean theorem indirect measurement
There are three methods for measuring the unilateral distance of a triangle using
the Pythagorean theorem. This is convenient for users undertaking indirect
measuring in certain complex environments.
Notes:
•All measuring points must be on the same horizontal or vertical surface.
•To ensure the accuracy of the measurement, the distance must be measured from
the same starting point, measuring in a certain order (the hypotenuse edge first,

then the other cathetus). It is recommended to attach the meter to a tripod to aid
measuring.
•Under the Pythagorean theorem measurement mode, length of the other cathetus
must be shorter than the hypotenuse length so that the instrument can make the
calculation, otherwise an error symbol will be displayed.
7.8.1 Indirect measurement to determine the distance of a cathetus by
measuring the hypotenuse edge and the other cathetus
1) Press the button, and the triangle icon with the hypotenuse edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the hypotenuse line (1)
according to the display prompt.
3) Press the button to measure the length of the bottom line (2).
4) The length of the dotted line will be calculated automatically by the meter and will
appear on the main measurement display.
3) Press the button again to remove the previous measured result and to exit
area measurement.
7.7 Volume measurement
Double press the button, and the cube icon with one edge flashing
will appear on the left-hand side of the display. Complete the following operations
according to the instructions:
1) Press the button to measure the first edge (length).
2) Press the button to measure the second edge (width).
3) Press the button to measure the third edge (height). The volume will be
calculated automatically by the meter and the results shown on the main measurement
display.
4) Press the button again to remove the previous measured result and to exit
volume measurement.
7.8 Pythagorean theorem indirect measurement
There are three methods for measuring the unilateral distance of a triangle using
the Pythagorean theorem. This is convenient for users undertaking indirect
measuring in certain complex environments.
Notes:
•All measuring points must be on the same horizontal or vertical surface.
•To ensure the accuracy of the measurement, the distance must be measured from
the same starting point, measuring in a certain order (the hypotenuse edge first,

7.8.3 Indirect measurement to determine the distance of the hypotenuse edge
by measuring the two catheti
1) Press the button 3 times, and the triangle icon with vertical edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the vertical line (1) according
to the display prompt.
3) Press the button to measure the length of the bottom line (2).
4) The length of the dotted hypotenuse line will be calculated automatically by the meter
and will appear on the main measurement display.
7.9 Adding and subtracting measurements
Adding and subtracting measurements can be done by adding/subtracting single
distance measurements to get accumulated results.
•Press the button, “+” will appear on the display and the device will enter
accumulated adding mode. The previously measured value, the current measurement
and their combined value will be displayed.
•Press the button, “–” will appear on the display and the device will enter
accumulated subtracting mode. The previously measured value, the current
measurement and their difference will be displayed.
•To turn on/off the sound signal, press the button for 3 seconds.
7.8.2 Indirect measurement to determine a distance by measuring the
hypotenuse edges and one cathetus in two right-angled triangles
1) Double press the button, and the triangle icon with the hypotenuse edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the hypotenuse line (1)
according to the display prompt.
3) Press the button to measure the length of the second line (2).
4) Press the button to measure the length of the hypotenuse edge of the
bottom triangle (3).
5) The length of the dotted line (the catheti of two triangles) will be calculated
automatically by the meter and will appear on the main measurement display.

7.8.3 Indirect measurement to determine the distance of the hypotenuse edge
by measuring the two catheti
1) Press the button 3 times, and the triangle icon with vertical edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the vertical line (1) according
to the display prompt.
3) Press the button to measure the length of the bottom line (2).
4) The length of the dotted hypotenuse line will be calculated automatically by the meter
and will appear on the main measurement display.
7.9 Adding and subtracting measurements
Adding and subtracting measurements can be done by adding/subtracting single
distance measurements to get accumulated results.
•Press the button, “+” will appear on the display and the device will enter
accumulated adding mode. The previously measured value, the current measurement
and their combined value will be displayed.
•Press the button, “–” will appear on the display and the device will enter
accumulated subtracting mode. The previously measured value, the current
measurement and their difference will be displayed.
•To turn on/off the sound signal, press the button for 3 seconds.
7.8.2 Indirect measurement to determine a distance by measuring the
hypotenuse edges and one cathetus in two right-angled triangles
1) Double press the button, and the triangle icon with the hypotenuse edge
flashing will appear on the display; the laser is turned on.
2) Press the button to first measure the length of the hypotenuse line (1)
according to the display prompt.
3) Press the button to measure the length of the second line (2).
4) Press the button to measure the length of the hypotenuse edge of the
bottom triangle (3).
5) The length of the dotted line (the catheti of two triangles) will be calculated
automatically by the meter and will appear on the main measurement display.

9. Troubleshooting
During operation, symbols may appear on the display. The below errors can be
detected:
Symbol
Causes
Solutions
Improper measurement; too
weak or too strong a signal.
Re-measure or measure target objects that
have a stronger or weaker reflective capability,
or use a reflection board.
Light surrounding the target
object is too strong.
Measure the target objects in a weaker
surrounding light.
Beyond operating temperature
(above 40 °C or below 0 °C).
Carry out measurement with the meter in the
specified range (0 °C to 40 °C).
2800 Device failure.
The device is not damaged if this symbol
appears on the display and disappears when
the device is turned off and then on again. If
this symbol remains on the display when the
device is turned off and on several times, the
device is damaged.
7.10 Storage and browsing
•Store measurements: Under measuring mode, the measured value will be
automatically stored in the memory. The device has memory for 10 readings.
•Browse measurements: Press the button once to browse the stored
measurement data. Press the or button to browse forwards or
backwards.
Press and hold the button to remove all stored data.
8. Notes
•Using the meter in harsh environments may affect the measurement results: these
include environments with strong sunlight, high temperatures or large temperature
fluctuations. Surfaces that are not reflective enough and low battery power can also
affect the measurement results.
•The meter should not be stored in environments with high temperature and humidity.
If it is not being used for a long period, remove the batteries and place the meter in
the supplied storage pouch and store in a cool dry place.
•Please keep the device clean. Use a soft damp cloth to wipe off dust. Do not use any
corrosive liquids during cleaning or maintenance of this meter.

9. Troubleshooting
During operation, symbols may appear on the display. The below errors can be
detected:
Symbol Causes Solutions
Improper measurement; too
weak or too strong a signal.
Re-measure or measure target objects that
have a stronger or weaker reflective capability,
or use a reflection board.
Light surrounding the target
object is too strong.
Measure the target objects in a weaker
surrounding light.
Beyond operating temperature
(above 40 °C or below 0 °C).
Carry out measurement with the meter in the
specified range (0 °C to 40 °C).
2800 Device failure.
The device is not damaged if this symbol
appears on the display and disappears when
the device is turned off and then on again. If
this symbol remains on the display when the
device is turned off and on several times, the
device is damaged.
7.10 Storage and browsing
•Store measurements: Under measuring mode, the measured value will be
automatically stored in the memory. The device has memory for 10 readings.
•Browse measurements: Press the button once to browse the stored
measurement data. Press the or button to browse forwards or
backwards.
Press and hold the button to remove all stored data.
8. Notes
•Using the meter in harsh environments may affect the measurement results: these
include environments with strong sunlight, high temperatures or large temperature
fluctuations. Surfaces that are not reflective enough and low battery power can also
affect the measurement results.
•The meter should not be stored in environments with high temperature and humidity.
If it is not being used for a long period, remove the batteries and place the meter in
the supplied storage pouch and store in a cool dry place.
•Please keep the device clean. Use a soft damp cloth to wipe off dust. Do not use any
corrosive liquids during cleaning or maintenance of this meter.

FI Laseretäisyysmittari
1. Turvallisuusohjeet
Lue kaikki tämän oppaan käyttö- ja turvallisuusohjeet ennen laitteen käyttöä.
Näiden ohjeiden noudattamatta jättäminen voi vahingoittaa laitetta, johtaa
virheellisiin mittaustuloksiin tai aiheuttaa käyttäjälle ruumiillisia vammoja.
Laseretäisyysmittaria ei saa yrittää purkaa tai korjata millään tavalla.
Laitetta ei saa muunnella millään tavalla. Pidä laite lasten ulottumattomissa.
Lasersädettä ei saa suunnata silmiin tai muihin kehonosiin. Älä suuntaa
lasersädettä voimakkaasti heijastaviin pintoihin.
Koska laseretäisyysmittarin sähkömagneettinen säteily aiheuttaa häiriöitä
muissa järjestelmissä ja laitteissa, älä käytä laitetta lentokoneissa tai
lääketieteellisten laitteiden läheisyydessä.
Lasertaso
•Lasersäde on näkyvä, ja se lähetetään sensorialueen vieressä sijaitsevasta
laseraukosta. Laitteen laserosoitin kuuluu luokkaan II, ja se on standardin IEC
60825-1:2007 mukainen.

•Älä katso suoraan lasersäteeseen. Älä koskaan suuntaa lasersädettä ihmiseen
tai mihinkään muuhun kuin mitattavana olevaan kohteeseen. Lasersädettä ei saa
katsoa optisilla laitteilla, kuten okulaareilla tai kaukoputkilla. Vältä epäsuoraa
lasersäteelle altistumista heijastavien pintojen, kuten lasien tai peilien, kautta.
2. Paristojen asettaminen ja vaihtaminen
•Irrota laitteen takapuolella oleva paristokotelon kansi, aseta paristot
napaisuusmerkintöjen mukaisesti koteloon ja kiinnitä sitten paristokotelon kansi
takaisin paikalleen.
•Kun LCD-näytön paristotilan symboli ilmoittaa, että paristovirta on alhainen,
paristot pitää vaihtaa uusiin.
•Laseretäisyysmittarissa saa käyttää ainoastaan 1,5 V:n AA-alkaliparistoja.
•Jos et aio käyttää laitetta pitkään aikaan, poista paristot laitteesta välttääksesi
paristojen vuotamisesta aiheutuvan laitteen kotelon vaurioitumisen.
3. Ominaisuudet
•Mittausaika: yksittäinen mittaus 0,3 sekuntia/mittaus, jatkuva mittaus
7 mittausta/sekunti.
•Laite tallentaa mitatut arvot automaattisesti. 10 mittaustulosta pysyy laitteen
muistissa. Käyttäjä voi tarkastella kaikkia tallennettuja arvoja, mukaan lukien
yksittäiset mittaukset sekä lasketut mittaustulokset.
•Laitteella voi suorittaa tallennettujen mittausarvojen yhteen- ja
vähennyslaskuja.

4. Tekniset tiedot
Mittaustarkkuus
± 1,5 mm
Näytön tarkkuus
1 mm
Lasertaso
Luokka II
Lasertyyppi
630–670 nm, < 1 mW
Pinta-alan ja tilavuuden mittaustoiminnot
√
Pythagoraan lauseen mittaustoiminto
√
Toiminto mittaustulosten yhteen- ja
vähennyslaskuihin
√
Jatkuvan mittauksen toiminto
√
MAX/MIN
√
Taustavalaistu monirivinen näyttö
√
Pöly- ja vesitiivis
IP 54
Käyttölämpötila-alue
0...+40 °C
Säilytyslämpötila
–20...+70 °C
Paristot
2 x 1,5 V AA (LR6)
Lasersäteen automaattinen sammutus
30 s
Automaattinen virrankatkaisu
Noin 80 sekuntia
Koko
118 x 53 x 26 mm
Huomioitavaa: Hyvissä olosuhteissa laite voi mitata 10 metrin etäisyyteen saakka
(esim. mitattavasta pinnasta tai huoneen lämpötilasta riippuen). Epäsuotuisat
mittausolosuhteet, kuten liian voimakas valo tai liian suuret lämpötilaerot, voivat
aiheuttaa poikkeamia, kun mitattavat etäisyydet ovat yli 10 metriä.
Mittaustyökalu toimitetaan varustettuna varoituskilvellä. Jos varoituskilven teksti ei
ole sinun kielelläsi, liimaa ennen ensimmäistä käyttöä toimitukseen kuuluva, oman
kielesi tarra alkuperäisen kilven päälle.

5. LCD-näytön kuvaus
1. Lasersäde käytössä
2. Mittauksen aloituspiste
3. Epäsuora mittaus
4. Pinta-alan ja tilavuuden mittaus
5. Tietojen tallennus / tallennettujen
tietojen tarkastelu
6. Ensisijaisen mittauksen näyttö
7. Mittayksiköiden symbolit
8. Lisänäyttö
9. Paristotilan symboli
10. Laitevian symboli
11. MAX-/MIN-symbolit
12. Toimintavirheen symbolit
6. Laitteen kuvaus
1. Sensorialue
2. LCD-näyttö
3. Lasersäteen käyttöönotto (MEAS)
4. Vesivaaka
5. Mittayksikön painike (UNIT)
6. Pythagoraan lauseen mukaisen
epäsuoran mittauksen painike
7. Aikaviiveen painike (TIMER)
8. Miinuspainike (–)
9. Sammutus-/poistopainike (OFF/DEL)

10. Tallennuspainike (M)
11. Pinta-alan ja tilavuuden mittauksen painike
12. Pluspainike (+)
13. Mittauksen aloituspisteen valinnan painike
14. Liitäntä jalustalle
15. Paristokotelon kansi
7. Käyttö
7.1 Virran kytkeminen päälle ja pois päältä
•Käynnistä mittari pitämällä -painiketta painettuna, kunnes näyttö ja laser
kytkeytyvät samanaikaisesti päälle. Laite on valmis mittaukseen.
•Sammuta mittari pitämällä -painiketta painettuna 3 sekunnin ajan. Mittari
sammuu automaattisesti, jos sitä ei käytetä noin 80 sekuntiin.
7.2 Mittayksikön valinta
Valitse haluamasi mittayksikkö – m (metri), ft (jalka) tai in (tuuma) – painamalla
-painiketta.
7.3 Mittaus aikaviiveellä
Mittaus aloitetaan 5 sekunnin aikaviiveen kuluttua, kun painat -painiketta
laitteen ollessa päällä.

7.4 Mittauksen aloituspisteen valinta
Paina -painiketta valitaksesi mittauksen aloituspisteeksi mittarin ylä- tai
alaosan. Laitteen oletusasetuksena on mittarin alaosan käyttö aloituspisteenä.
7.5 Yksittäinen ja jatkuva mittaus
•Paina -painiketta, kun laite on mittaustilassa. Laite lähettää lasersäteen
kohteena olevaan mittauspisteeseen. Paina painiketta uudelleen mitataksesi
yksittäisen etäisyyden mittauspisteeseen. Mittauksen tulos näkyy LCD-näytöllä.
•Suorita jatkuvia mittauksia pitämällä mittaustilassa olevan laitteen -painiketta
pitkään painettuna. Jatkuvan mittauksen tilassa saadut maksimi- ja minimiarvot
näkyvät näytöllä. Ajantasainen mittausarvo näkyy ensisijaisen mittauksen näytöllä.
Paina painiketta uudelleen lopettaaksesi jatkuvan mittauksen.
7.6 Pinta-alan mittaaminen
Paina -painiketta. Näytön vasempaan reunaan ilmestyy suorakulmiokuvake
, jonka yksi sivu vilkkuu. Suorita seuraavat ohjeiden mukaiset vaiheet:
1) Paina -painiketta mitataksesi ensimmäisen sivun (pituus).
2) Paina -painiketta mitataksesi toisen sivun (leveys). Laite laskee pinta-alan
automaattisesti ja näyttää tuloksen ensisijaisen mittauksen näytöllä.
3) Paina -painiketta uudelleen poistaaksesi edellisen mittaustuloksen ja
poistuaksesi pinta-alan mittauksen tilasta.

7.7 Tilavuuden mittaaminen
Paina -painiketta kaksi kertaa. Näytön vasempaan reunaan ilmestyy
kuutiokuvake , jonka yksi sivu vilkkuu. Suorita seuraavat ohjeiden mukaiset
vaiheet:
1) Paina -painiketta mitataksesi ensimmäisen sivun (pituus).
2) Paina -painiketta mitataksesi toisen sivun (leveys).
3) Paina -painiketta mitataksesi kolmannen sivun (korkeus). Laite laskee
tilavuuden automaattisesti ja näyttää tuloksen ensisijaisen mittauksen näytöllä.
4) Paina -painiketta uudelleen poistaaksesi edellisen mittaustuloksen ja
poistuaksesi tilavuuden mittauksen tilasta.
7.8 Pythagoraan lauseen mukaiset epäsuorat mittaukset
Pythagoraan lauseeseen perustuvia kolmion yksittäisten sivujen mittauksia voidaan
suorittaa kolmella eri tavalla. Tämä on erityisen kätevää silloin, kun epäsuoria
mittauksia tehdään hankalissa olosuhteissa.
Huomaa:
•Kaikkien mittauspisteiden pitää olla samalla horisontaalisella tai vertikaalisella
pinnalla.
•Mittaustarkkuuden varmistamiseksi etäisyydet pitää mitata samasta
aloituspisteestä ja mittaukset suorittaa tietyssä järjestyksessä (mittaamalla ensin
hypotenuusa ja sen jälkeen toinen kateetti). Mittauksen helpottamiseksi
suosittelemme asettamaan mittarin jalustaan.
•Jos mittaria käytetään Pythagoraan lauseen mukaisiin mittauksiin, kolmion toisen
kateetin pituuden pitää olla hypotenuusan pituutta lyhyempi. Muutoin mittari ei voi
suorittaa laskelmaa, ja laitteen näytölle ilmestyy virhesymboli.