Ferrida LDM 50M User manual
Laser Distance Measurer
LDM 50M
User Manual
ENGLISH 4
DEUTSCH 12
ČESKY 21
SLOVENSKY 29
MAGYAR 37
WARRANTY & SUPPORT 45
GARANTIE & BETREUUNG 45
ZÁRUKA & PODPORA 45
ZÁRUKA & PODPORA 45
GARANCIA & TÁMOGATÁS 45
4ENGLISH
SAFETY INSTRUCTIONS
All instructions must be read and observed in order for the mea-
suring tool to function safely. The safeguards integrated into the
measuring tool may be compromised if the measuring tool is not
used in accordance with these instructions. Never make warning
signs on the measuring tool unrecognisable. SAVE THESE IN-
STRUCTIONS FOR FUTURE.
LASER RADIATION
DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT
• Do not direct the laser beam at persons or animals and do not
look directly into the laser beam or at its reflection. Doing so
could lead to blindless, or could cause accidents or damage
to the eyes.
• If laser radiation hits your eye, you must close your eyes and
immediately turn your head away from the beam.
• Do not make any modifications to the laser equipment.
• Do not use the laser goggles as protective goggles. The laser
goggles make the laser beam easier to see; they do not pro-
tect you against laser radiation.
• Do not use the laser goggles as sunglasses or while driving.
The laser goggles do not provide full UV protection and
impair your ability to see colours.
• Have the measuring tool serviced only by a qualified specialist
using only original replacement parts. This will ensure that the
safety of the measuring tool is maintained.
• Do not let children use the laser measuring tool unsupervised.
They could accidentally dazzle someone.
5
ENGLISH
• Do not use the measuring tool in explosive atmospheres
which contain flammable liquids, gases or dust. Sparks may
be produced inside the measuring tool, which can ignite dust
or fumes.
• Protect the measuring tool against heat, e.g. including pro-
longed sun exposure, fire, water, and moisture. Danger of
explosion.
TECHNICAL SPECIFICATION
Maximum measu-
ring range 0.2-50) m
Typical measuring
accuracy ± 2mm
Measuring units m / in / ft / ft+in
Laser class Class 2
Laser type 630-670 Nm, < 1 mw
Measuring functions Area and volume measurement, addi-
tion/subtraction, single distance mea-
surement, continuous measurement,
continuous distance measurement
(min/max)
Ingress protection IP54
Historical data 20 sets
Operating tempe-
rature 0-40 °C
Storage temperature -10-60 °C
Battery type Type AAA 2× 1.5V
Battery life approx. 5000 measurements
Dimensions 115 × 52 × 32 mm
Weight 118 g
6ENGLISH
OVERVIEW
BUTTONS
1 Power on / Laser on / Measure
2 More functions
3 Continuous measurement
4 Addition / Subtraction
5 Historical data
6 Reference point
7 Backlight / Unit
8 Clear / Power off
DISPLAY
1 Laser on
2 Reference point (top)
3 Reference point (bottom)
4 Reference point (end-piece)
5 Continuous measurement
6 Error message
7 (8, 9, 10): auxiliary functions
11 Battery status
12 Historical data
13 Value 1
14 Value 2/Min value
15 Value 3/ Max value
16 Summary line / latest value/ calculation result
OPERATION
POWER ON / OFF
Power on
Long press
MEAS
ON
to power on the device, and directly goes to single
distance measurement interface.
Power off (manually)
Long press
CLEAR
OFF
to switch off the device.
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ENGLISH
Power off (automatically)
The instrument switches off automatically after three minutes of
inactivity.
SINGLE DISTANCE MEASUREMENT
Press
MEAS
ON
to activate the laser. Press
MEAS
ON
again to trigger the distance
measurement. The result is displayed immediately.
CONTINUOUS MEASUREMENT (MIN / MAX)
Press key to activate continuous
measurement. User can press
MEAS
ON
or
CLEAR
OFF
to stop the function and the
values of maximum and minimum
distances are shown in the display
as well as the last measured value
in the summary line.
This function will be stopped au-
tomatically after 5 minutes of inactivity.
AREA MEASUREMENT
Press once, the symbol appears in function filed of display.
Press
MEAS
ON
to take the first distance measurement (e.g. length). Press
MEAS
ON
again to take the second distance measurement (e.g. width).
The results of length, width and area are displayed in the display
orderly.
VOLUME MEASUREMENT
Press twice, the symbol appears in the function field on the
display.
Press
MEAS
ON
to take the first length measurement (e.g. length). Next
get the width, then height, the result of length, width, height and
volume is displayed orderly.
INDIRECT MEASUREMENT USING THE PYTHAGORAS
THEOREM
This laser distance measurer calculates indirect distance using
Pythagorean Theorem. Note that target points should be in the
same line. When measuring the 2nd distance, laser beam should
be right-angled to the line.
8ENGLISH
Two points measurement
Refer to figure 1. Press three times to activate
the function, the symbol appears in the func-
tion field on the display.
Take No. 1, and No. 2 length, the result is dis-
played on the summary line. Press
CLEAR
OFF
to delete
any measured length and then press
MEAS
ON
to re-
-measure.
Three points measurement
Refer to figure 2. Press four times to activate
the function, the symbol appears in the func-
tion field on the display. Take No. 1, No. 2 and
No. 3 length, the result is calculated and dis-
played on the summary line.
Press
CLEAR
OFF
to delete any measured length and
then press
MEAS
ON
to re-measure.
SETTING UP A REFERENCE POINT
Press to switch reference point between the top, bottom and
end-piece of the instrument.
There is a beep warning tone when reference point is changed.
The default reference setting is from the rear of the instrument.
The reference point will be set to default every time when
it’s powered off. The measuring reference point is from the rear
of the instrument every time when it’s powered on.
Figure 1
?
Figure 2
9
ENGLISH
AUXILIARY FUNCTIONS
Backlight
Press
Unit
to turn on and off backlight, to read data on display clear-
ly in darkness.
Unit Change
Long press
Unit
to change distance unit between m, ft, in and ft+in
Addition/Subtraction
Take a measurement, then press +/- or long press it, addition/
subtraction symbol will appear on display, then press
MEAS
ON
button
to take the second measurement, the second value will be auto-
matically added to/subtracted from the first one.
This process can be repeated as required.
Cancel/Clear measurement
When measuring, press
CLEAR
OFF
to cancel the last action or clear me-
asured data.
Historical Data
Press to view historical data, the last 20 measured data will be
displayed in reversed order.
Press
CLEAR
OFF
to quit historical data viewing.
TROUBLESHOOTING
All errors or failures will be shown as codes. The following table
explains the meaning of codes and solutions.
Code Cause Corrective Measure
204 Calculation error Refer to user manual, repeat the
procedures.
208 Excessive current Please contact your distributer
220 Battery low Replace new batteries.
252 Temperature is
too high The external temperature for the
instrument should be kept at
0°C-40°C
253 Low temperature Warm up the device to meet work
conditions.
10ENGLISH
255 Received signal
too weak, mea-
surement time
too long
Use target plate or change a good
refection.
256 Received signal
too strong Target too reflective use target
plate or do not aim at strong light
objective.
261 Measure value
over range Please make measurement within
its range.
500 Hardware error Switch on/off the device several
times. If the symbol still appears,
then your instrument is defective.
Please call your dealer for as-
sistance.
EU DECLARATION OF CONFORMITY
Identification details of the authorised representative of the
manufacturer/importer:
Importer: Alza.cz, a. s.
Registered office: Jankovcova 1522/53, Holešovice, 170 00 Prague 7
Company ID: 27082440
Subject of the declaration:
Name: Laser Distance Measurer
Model/Type: FRD-LDM50M
The above product has been tested in accordance with the
standard(s) used to demonstrate compliance with the essen-
tial requirements set out in the Directive(s):
Directive 2014/30/EU
Directive (EC) 2011/65/EU (RoHS)
Reference to harmonised standards:
EN 61326-1:2013
EN 61326-2-2:2013
EN 60825-1:2014
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