Futech DISTY 120RC User manual

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 1
INSTRUCTION MANUAL [EN]
250.120RC – DISTY 120RC
OVERVIEW
1. Battery compartment
2. Micro USB socket
3. Measure / ON
4. Plus / Up (*)
5. Minus / Down (*)
6. Menu/Equal
7. Measuring modes
8. Camera
9. Digital bubble / Staking-out
10. Reference point / Timer
11. Records / Save
12. Clear / OFF
13. End piece
14. 1/4” tripod connection
a. Reference point setting
b. Laser indicator
c. Measuring mode
d. Tilt angle
e. Power supply
f. Measuring mode: dimension
g. Auxiliary display area: value + unit
h. Major display area
i. Unit of the major display.
(*) It is possible that on your device the up and down arrows printed on the keys are swapped.
We apologise for the inconvenience.
SAFETY
Please read the complete safety instructions in the booklet delivered with this device.
Use extreme caution when the laser beam is turned on.
Do not let the beam enter your eyes, another person’s eyes or the eyes of an animal. Be careful that reflections
of the beam (on a reflective surface) do not strike your eyes.
Do not aim the laser beam at any gas that may explode.
DO NOT USE THE MICRO USB SOCKET [2] IN COMBINATION WITH ALKALINE BATTERIES.
DISTY120RC
1
11 2
14
13
9
7
6
4
12
10
8
5
3
a
c
d
e
g³
g²
g¹
h
f³
b
f²
f¹
i

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 2
FIRST USE
Remove protective films where applied.
Open the battery compartment [1] on the back of the product and insert the recommended
batteries.
Type of battery: 3 x 1,2V AAA Ni-MH batteries (recharcheable) or 3 x 1,5V AAA Alkaline batteries
(not recharcheable). Never use two types of batteries at the same time!
Using the micro-USB socket [2] and the supplied (micro-)USB cable you can charge the
recharcheable Ni-MH batteries. Don’t use the micro-USB socket [2] in combination with Alkaline
batteries!
Switch on the device by holding the Measure / ON button [3] for 1 second. The screen lights and
the major interface is shown.
The product is turned off in two ways.
The product can be turned off by holding the Clear / OFF button [12] for 3 seconds.
When not being used, the meter will be turned off automatically after 150 seconds. This setting can
be changed in the menu.
SETTINGS
Enter the menu by pressing the Menu / Equal button [6]. The settings menu will be visible.
Navigate in the menu using the Plus / Up [4] and the Minus / Down [5] button.
Select the item you like to change pressing the Menu / Equal button [6].
Change the value using the Plus / Up [4] and the Minus / Down [5] button.
Press the Menu / Equal button [6] again to confirm.
Repeat these steps to change other settings or exit the Menu using the Clear / OFF button [12].
Backlight
Determine how long the display remains fully lit after
the last touch. After this time, the display will dim.
5 seconds ~ 60 seconds
Laser Lasting
Determine how long the laser is activated after
activation without measuring.
20 seconds ~ 120 seconds
Auto Power OFF
Determine how long the device remains switched on
after the last manipulation. After this time the device
will turn itself off.
100 seconds ~ 300 seconds
Tone
(De-)Activate the sound

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 3
Distance Unit
Choose the preferred unit to display the measuring
results.
0.000m
0.00m
0.0 in
In 1/32
0’ 00” 1/32
0.000
0.00
0.00 ft
Angle Unit
Choose the preferred unit to display angles.
° (degrees)
%
Calibration
NOTE: Calibration function may affect precision of the
device! This item cannot be adjusted in default mode.
User need to follow below steps to enter calibration.
× Turn off the device
× Hold the Records / Save button [11] and press the
measure / ON [3] button shortly. The device will
start-up.
× Release the Records / Save button [11] after the
start-up screen has disappeared. The mainscreen
is visible.
× Enter the menu and navigate to Calibration like
described above. Now the Calibration function is
free to enter.
- 0.009m ~ +0.009m
USAGE
§ Reference point
Four different reference points can be used.
Front Middle (screw) Back End-piece
Different reference points can be chosen using the Reference point / Timer button [10]. The
Reference point setting [a] will be visible on screen.

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 4
§ Measuring modes
Note:
These two operations can be done in all modes below.
- To undo the last measurement, press the Clear / OFF button [12].
- To save the measured values/results, hold the Records / Save button [11] for 1 sec.
For all Pythagoras measurements the user must follow the instructions’ order strictly!
We recommend to mount the instrument on a tripod with tilting head to increase the
accuracy of your measurement.
1. Distance measurement (single / continuous)
Single measurement
For a single measurement: press the Measure / ON button [3] and focus on the target.
Press the Measure / ON button [3] a second time for a single measurement.
The result is displayed in the Major display area [h]. The previous 3 measurements are
displaced above in the auxiliary displays [g1, g2, g3].
Continuous measurement (minimum/maximum)
Hold the Measure / On [3] and focus on the target point.
To know the minimum and maximum distance, slightly move the focus left / right / up / down.
During measuring the actual maximum distance is displayed in the auxiliary display area [g2],
the minimum actual distance is displayed in the auxiliary display area [g1]. The mayor display
area [h] shows the actual distance measured during continuous measuring.
Press the Measure / On button [3] again to end the continuous measuring.
You can read the maximum measured distance in the auxiliary display area [g2], the minimum
actual distance in the auxiliary display area [g1]. The mayor display area [h] shows the last
distance measured.
2. Area Measurement
Press the Measuring modes button [7] that number of times needed until the Area
Measurement symbol appears on the measuring mode area [c] on the screen.
Measure the area in 2 steps:
Press the Measure / ON button [3]
to measure the first side
Length of side 1 appears on
auxiliary display area [g3]

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 5
Press the Measure / On button [3]
a second time to measure the
second side
Length of side 2 appears on
auxiliary display area [g2]
The Major display Area [h] and it’s
unit [i] shows the result of the area
calculation.
(m2)
3. Volume Measurement
Press the Measuring modes button [7] that number of times needed until the Volume
Measurement symbol appears on the measuring mode area [c] on the screen.
Measure the Volume in 3 steps:
Press the Measure / ON button [3]
to measure the first side
Length of side 1 appears on
auxiliary display area [g3]
Press the Measure / On button [3] a
second time to measure the
second side
Length of side 2 appears on
auxiliary display area [g2]
Press the Measure / On button [3] a
third time to measure the third side
Length of side 3 appears on
auxiliary display area [g1]
The Major display Area [h] and it’s
unit [i] shows the result of the
volume calculation.
(m3)
4. Painter function
This function can be used for example to know the total area of all the walls in one room.
Press the Measuring modes button [7] that number of times needed until the Painter function
symbol appears on the measuring mode area [c] on the screen.
Measure the Volume in 3 steps:
Press the Measure / ON button [3]
to measure the height of the room
The height appears on auxiliary
display area [g3]

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 6
Press the Measure / On button [3] a
second time to measure the first
wall
Length of wall1appears on
auxiliary display area [g2]
The Major display Area [h] and it’s
unit [i] shows the result of the area
calculation. (m2)
(height x wall1)
Press the Measure / On button [3] a
third time to measure the second
wall
Length of wall2appears on
auxiliary display area [g1]
The Major display Area [h] and it’s
unit [i] shows the updated result
of the area calculation. (m2)
(height x wall1)+(height x wall2)
You can repeat this last step and continue measuring additional walls for as long as
necessary. The height always remains visible in secondary display [g3], the previously
measured walls move up one place each time. After each additional wall measured, the
Major display area [h] will show the new, updated total area of all walls measured.
5. Simple Pythagoras: Two legs (based on Hypothenuse and angle)
Only 1 measurement is needed. Pointing the distance meter along the axis of interest (c), the
angle (α) and length of c will be calculated.
Press the Measuring modes button [7] that number of times needed until the “Simple
Pythagoras” symbol appears on the measuring mode area [c] on the screen.
Press the Measure / ON button [3]
to measure the length of the
hypotenuse (c).
The angel (α) appears on auxiliary
display area [g3]
Length of Hypothenuse (c)
appears on auxiliary display area
[g2]
The length of the horizontal side
(a) appears on auxiliary display
area [g1]
The Major display Area [h] shows
the length of side (b).

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 7
6. Pythagoras: Second leg (based on Hypothenuse and one leg)
Calculate the third leg, by measuring the hypothenuse and base leg of a right (90°) triangle.
Press the Measuring modes button [7] that number of times needed until the “Pythagoras,
second leg” symbol appears on the measuring mode area [c] on the screen.
The device uses your measured values a and b to determine the dimension of c. The device
assumes a triangle with a right angle (90°).
Press the Measure / ON button [3]
to measure the length of the
hypotenuse (c).
The length of the hypotenuse (c)
appears on the auxiliary display
area. [g2]
Press the Measure / ON button [3]
a second time to measure the
length of one side (a).
The length of side (a) appears on
the auxiliary display. [g1]
The Major display Area [h] shows
the length of side (b).
7. Pythagoras: Hypothenuse (based on two legs of a right triangle)
Calculate the hypothenuse (c) by measuring two legs of a right (90°) triangle.
Press the Measuring modes button [7] that number of times needed until the “Pythagoras:
Hypothenuse” symbol appears on the measuring mode area [c] on the screen.
The device uses your measured values a and b to determine the dimension of c. The device
assumes a triangle with a right angle (90°).
Press the Measure / ON button [3]
to measure the length of the first
side (a).
The length of side (a) appears on
the auxiliary display area. [g2]

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 8
Press the Measure / ON button [3]
a second time to measure the
second length, side (b).
The length of side (b) appears on
the auxiliary display. [g1]
The Major display Area [h] shows
the length of the hypothenuse (c).
8. Pythagoras: Sum of 2 triangles (based on two legs and distance)
Calculate the third side of a triangle by measuring the other two sides and the altitude.
Press the Measuring modes button [7] that number of times needed until the “Pythagoras:
Sum of 2 triangles” symbol appears on the measuring mode area [c] on the screen.
The device asks for the dimensions a, h & b. The display always shows which dimension is
asked. The device calculates and displays the dimension of c.
Press the Measure / ON button [3]
to measure the length of the first
side (a).
The length of side (a) appears on
the auxiliary display area. [g3]
Press the Measure / ON button [3]
a second time to measure the
horizontal distance (h).
The horizontal distance (h)
appears on the auxiliary display.
[g2]
Press the Measure / ON button [3]
a third time to measure the second
side (b).
The length of second side (b)
appears on the auxiliary display.
[g1]
The Major display Area [h] shows
the length of third side (sum of 2
triangles) (c).
9. Pythagoras: Subtraction of 2 triangles (based on Hypothenuse, auxiliary line and
base leg of right triangle)
Calculate the length of the highlighted side by measuring hypothenuse, auxiliary line and
base leg of the right (90°) triangle.
Press the Measuring modes button [7] that number of times needed until the “Pythagoras:
subtraction of 2 triangles” symbol appears on the measuring mode area [c] on the screen.

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 9
The device uses your measurements c, l1and a (respectively) to determine the height l2.
Press the Measure / ON button [3]
to measure the length of the
hypothenuse (c).
The length of the hypothenuse (c)
appears on the auxiliary display
area. [g3]
Press the Measure / ON button [3]
a second time to measure the
auxiliary line (l1).
The length of auxiliary line (l1)
appears on the auxiliary display.
[g2]
Press the Measure / ON button [3]
a third time to measure the altitude
(a).
The length of the altitude (a)
appears on the auxiliary display.
[g1]
The Major display Area [h] shows
the length of (l2), the part between
auxiliary line (l1) and hypothenuse
(c).
10. Area of an irregular triangle (based on 3 sides)
Calculate area of an irregular triangle by measuring the length of 3 sides.
Press the Measuring modes button [7] that number of times needed until the “Area of
triangle” symbol appears on the measuring mode area [c] on the screen.
The dimensions of a, b & c are asked respectively. The device calculates the total area of the
triangle.
Press the Measure / ON button [3]
to measure the first leg (a).
The length of leg (a) appears on
the auxiliary display. [g3]
Press the Measure / ON button [3]
a second time to measure the
second leg (b).
The length of leg (b) appears on
the auxiliary display. [g2]

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 10
Press the Measure / ON button [3]
a third time to measure the third
leg (c).
The length of leg (c) appears on
the auxiliary display. [g1]
The Major display Area [h] shows
the area of the measured triangle.
Note:
“ERR 5” will be displayed in the event that a measurement contradicts the characteristics of
a triangle (e.g. c is shorter than b). The measurement must be redone.
CALCULATION OPTIONS
1. Addition / Subtraction distances
Add
Subtract
Measure the distance as described above at ‘1. Distance measurement, single measurement’.
To add a measurement to this result, press
the Plus / Up button [4]. The result moves to
the auxiliary display [g2], a + appears in front
of the major display area [h]
To subtract a measurement to this result,
press the Minus / Down button [5]. The result
moves to the auxiliary display [g2], a –
appears in front of the major display area [h]
Measure the second distance as described above.
The last measurement appears on auxiliary display [g3], the result of the calculation will be
visible on the major display area [h]
àTo add / subtract additional measurements, just continue with the next measurement.
Tip:
You can switch between Addition and Subtraction by pressing the Plus / Up button [4] (to add
a measurement) or the Minus / Down button [5] (to subtract a measurement) just before
measuring an additional measurement.
2. Addition / Subtraction of areas
Add
Subtract
Measure the area as described above at ‘2. Area measurement’.
To add a measurement to this result, press
the Plus / Up button [4]. The result of the
previous measurement disappears, a +
appears in front of the major display area [h]
To subtract a measurement to this result,
press the Minus / Down button [5]. The result
of the previous measurement disappears, a –
appears in front of the major display area [h]
Measure the second area as described above.
The results of the new measurement will be visible.

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 11
à Option 1:
To add / subtract additional measurements, just continue with the next measurement.
àOption 2:
To see the result of all added / subtracted area measurements, press the Menu / Equal button
[6].
Tip:
You can switch between Addition and Subtraction by pressing the Plus / Up button [4] (to add
a measurement) or the Minus / Down button [5] (to subtract a measurement) just before
measuring an additional measurement.
3. Addition / Subtraction of volumes
Add
Subtract
Measure the volume as described above at ‘3. Volume measurement’.
To add a measurement to this result, press
the Plus / Up button [4]. The result of the
previous measurement disappears, a +
appears in front of the major display area [h]
To subtract a measurement to this result,
press the Minus / Down button [5]. The result
of the previous measurement disappears, a –
appears in front of the major display area [h]
Measure the second volume as described above.
The results of the new measurement will be visible.
à Option 1:
To add / subtract additional measurements, just continue with the next measurement.
àOption 2:
To see the result of all added / subtracted volume measurements, press the Menu / Equal
button [6].
Tip:
You can switch between Addition and Subtraction by pressing the Plus / Up button [4] (to add

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 12
a measurement) or the Minus / Down button [5] (to subtract a measurement) just before
measuring an additional measurement.
OTHER OPTIONS
1. Multi-direction electronic level bubble
Press the Digital bubble / Staking out button [9] to enter the Multi direction electronic bubble.
The left-bottom side shows the vertical angle of the device, the right bottom side the
horizontal angle of the device.
Press the Digital bubble / Staking out button [9] again to exit the Multi direction electronic
bubble.
2. Delay measurement
To delay a measurement, hold the Reference point / Timer button [10].
The delay time is shown on the top of the screen (in seconds). This value can be adjusted using
Plus / Up [4] or Minus / Down [5] button. Delay times between 3 and 60 seconds can be
chosen.
To start the delay measuring, press the Measure / On button [3] and the timer will start
counting down before measuring.
3. Staking out
This function is used to measure positions with a fixed distance.
S: Staking out value. The distance to the nearest, measured from the start.
a: Value a Distance between Start and the first target
b
a
S
M
b
a

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 13
b: Value b Distance between two targets, except start
M: Distance to the next target (in the direction of the arrow)
Arrow: Shows the direction to the nearest step
Hold the Digital bubble / Staking-out button [9]. The staking out symbol appears as measuring
mode [c].
Use the Plus / Up [4] and Minus / Down [5] button to set value a.
Confirm with the Measure / ON button [3].
Use the Plus / Up [4] and Minus / Down [5] button to set value b.
Confirm with the Measure / On button [3].
Place the device in its start position. The device measures continuously and shows in the Major
display area [h] the distance to the nearest targets (M).
The arrow shows the direction to the nearest target.
: Move forward
: Move backward
: Match the position
Example:
To exit the Staking out function, press the Clear / OFF [12] button.
a
b
S
M
a
b
S
M

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 14
4. Camera
When you are not able to see the laser spot, for example in very sunny weather or over long
distances, the build-in camera can be turned on using the camera button [8] and help you to
find the laser spot.
L: Level angle
V: Vertical angle
F: Focus cross
R: Measuring result (in Mayor display area [h])
Note: Camera measuring assistant is only useful when the distance is more than 10 meters.
× Single distance measuring
Press the Camera button [8] to turn on the camera in single measuring mode.
Make the cross, which is on the screen, point exactly your target.
Press the measuring / ON button [3] to measure the distance
The result will be visible in the Major display area [h].
× Area / Volume / Pythagoras measuring
Choose the function you like to use with the Measuring modes button [7].
Press the camera button [8] to turn on the camera.
Make the cross, which is on the screen, point exactly your target.
Press the measuring / ON button [3] to activate the measuring tool, press the
measuring / ON button [3] a second time to measure the distance.
Press the camera button [8] to deactivate the camera. The measuring result is now
registered and will be shown on the first Auxiliary display line [g3]
V
L
F
R

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 15
Activate the camera again with the camera button [8] to measure the second distance.
Make the cross, which is on the screen, point exactly your target.
Press the measuring / ON button [3] to activate the measuring tool, press the
measuring / ON button [3] a second time to measure the distance.
Press the camera button [8] to deactivate the camera. The measuring result is now
registered and will be shown on the second Auxiliary display line [g2]
(Repeat this last step if your function requires a third value. The result of this third value
will be visible on the third Auxiliary display [g1])
After measuring the last needed distance, deactivate the camera. The result of the
function will be shown on the Mayor display area [h].
5. Angle values on top of the screen
The device shows the tilt angle [d].
The range of this angle is always between -90.0° and 90.0°.
The unit, which can be chosen in the settings, is ° of % (slope).
TIPS
The device can be used with AAA batteries, alkaline of NiMh rechargeable batteries.
ONLY IN CASE NiMH BATTERIES ARE USED, you may charge this batteries using the Micro
USB socket [2] on the side of the device.
DO NOT USE THE MICRO USB SOCKET IN COMBINATION WITH ALKALINE BATTERIES
You may get some warning information.
Message
Meaning
Solution
ERR 1
Received signal is too weak
Chose a surface with a stronger
reflectance or use a reflector
ERR 2
Received signal is too strong
Chose a surface with a weaker
reflectance or use a reflector
ERR 3
Low Power
Replace (or recharge in case of
rechargeable batteries) the batteries
DO NOT RECHARCHE WHEN
ALKALINE BATTERIES ARE USED

MANUAL 250.120RC – DISTY 120RC [EN] V1.0 – 09.2022 16
ERR 4
Fail of memorizer
Please contact the manufacturer.
ERR 5
Pythagoras measuring error
Please re-measure
ERR 6
Exceed the measuring range
ERR 7
Fail of tilt
Contact the manufacturer.
SPECIFICATIONS
Working range
≤120 m
Smallest unit displayed
0,001 m
Measurement accuracy
± 0,002 m
Note: use a reflector to increase the measurement
range in case of too much light/poor reflective area.
Laser
Class 2: 635 nm, < 1mW
Continuous distance measuring (tracking)
Yes
Area/Volume/Pythagoras (simple & complex)
Yes
Optional units
m, inch, ft
°, %
Addition/Subtraction of measurements
Yes
Maximum/Minimum values
Yes
Staking-Out
Yes
Delay measurements
Yes
Self-calibration
Yes
Angle of tilt
±90°
Multi-direction electronic level bubble
Yes
Auxiliary sight (camera)
Yes
USB-connector
Yes
Storage temperature range
-20°C < T < 60°C
Working temperature range
0°C < T < 40°C
Batteries
3 x 1,2V AAA NiMH batteries (rechargeable)
or 3 x 1,5V AAA Alkaline batteries
Dimensions
130 x 56 x 29 mm
Weight
0,15 kg
Tripod connector
¼”
Dust-/waterproofness
IP54
Typical Tolerance: ±2mm, when reflectivity 100% (white surface), environment light <2000
LUX. 25 °C Tolerance is usually affected by the distance, reflectivity, and environment light etc.
It probably gets tolerance around ±( 2mm+0.2mm/m).