Medid PD-53 User manual

HAND-HELD LASER DISTANCE METER
PD-53
USER MANUALV 1.0

1
Safety Regulations
Before using this product, please carefully read and
understand all the terms and operational guidelines in this manual.
Hazardous laser radiation damage, electric shock or personal
injury may occur if operations are not implemented under those
safety regulations in this operation manual.
Do not change the performance of the laser in any way,
otherwise it may cause dangers due to laser exposure. Activate the
laser only when you use the instrument. Don’t stare at the laser
directly. Please keep your instrument safe from use of any
unauthorized persons.
·Do not shoot at others with the laser intentionally or in dark.
·Do not shoot the laser beam onto objects with high-reflective
surface.
·Do not place the laser meter in reach of the child.
Do not repair the equipment without authorization. If the
equipment is damaged, please contact your local dealer.
Electromagnetic radiation may interfere other instruments
or devices (such as medical instruments like pacemakers or
hearing aid .)
·Do not use the instrument near gas stations and other
inflammable and explosive places.
·Do not use the instrument near medical equipment.
·Do not use this instrument on the plane.
Please follow your local laws to dispose the obsolete
instrument.

2
1
2
3
Picture A
Picture B
4
7
5
2
1
6
3

3
Congratulations on your purchase of PD-53 distance meter.
The safety regulations and instructions
along with the user manual should be
read carefully before initial operation.
Overview
Keyboard
See Picture A:
1 ON / Single measure / Continuous measure
2 Function key--Area / Volume measure/ Pythagorean measure
3 Clear / OFF
Display
See Picture B
1 Laser ON
2 Reference (front/rear)
3Area/Volume/ Pythagorean
4 Battery display
5 Units with exponents ( 2/3 )
6Auxiliary Display
7Main display

4
Start Up
Inserting / Replacing Batteries
Remove the battery cover, insert the battery correctly. Close the
battery compartment. Replace the battery when this symbol
constantly blinks in the display.
· Only use alkaline batteries.
· Batteries should be removed in case of danger of corrosion, if
the device will not be used for a long time.
Operation
Switching on/off
Press , Device and laser are switched on to wait to
measure.
Holding down this key for 2 seconds to switch the device
off, the device also switches off automatically after 3 minutes of
inactivity i.e. no key is pressed within that interval.

5
Clear-Key
Cancel the last action. Within a function (area, volume,
etc.) single measurement can be deleted step by step and
re-measured.
Reference Setting
Default reference setting is the rear of the device.
Press this key to change the reference. The reference
returns automatically to the default setting (rear reference) after
power off.
Measuring Unit Setting
When the laser distance meter is off, holding this key
for about 5 seconds could switch the measuring unit
between ‘m’and ‘ft’.

6
Measuring
Single Measurement
Press this key to activate the laser. Press again to
implement the distance measurement.
Continuous Measurement
Press the key briefly to activate the laser, press and
hold key for about 2 seconds to start continuous measuring.
Press again shortly: continuous measurement is stopped.
During continuous measuring, the latest measured value is
displayed on the main display area, auxiliary display area shows
the minimum and maximum measured value.

7
Function
Area
Press this key once. This symbol is displayed.
Press key to take the first line measurement.
Press again and take the second line measurement. The
result is displayed in the main display area.
Volume
Press this key once，This symbol is displayed. Press
this key to take the three lines measurement and then
the volume value will be displayed in the main display area and
the third line measured value is displayed in the auxiliary area.
Pythagorean calculation
Pythagorean measurement is used in the condition that the
objective needing to be measured is covered or has no effective
reflecting surface and can’t be measured directly. The accurate
measured result can be got only when the laser beam and

8
measured goal are at the right angle.
Press this key briefly, this symbol is displayed in
the screen. According to the on-screen prompts,press
to take right angle edge - right angle, or bevel edge - right angle
edge operation then the instrument will automatically realize
Pythagorean operation, the result is displayed in the main
display area.
·When measuring in Pythagorean measurement mode,
right-angle edge length must be less than the length of the
hypotenuse, otherwise the equipment will report mention
information.
·Under the Pythagorean measurement mode, make sure to start
the measurement from the same starting point. In hypotenuse -
right angle edge model, it is also necessary to ensure that
right-angle side is perpendicular to the measured surface.

9
Appendix
Display Notices
In the course of using the instruments, information as below
may be displayed on the screen：
InFo
Cause
Correction
204
Data overflow
Repeat steps
205
measurement
range transfinite
Use the meter in distance
allowed
252
Temperature too
high
Let device cool down
253
Temperature too
low
Warm device up
255
Received signal
too weak
Measure target point with
stronger reflectance
256
Received signal
too strong
Measure target point with
weaker reflectance
206
Pythagorean
measurement
Violation
Re-measure and ensure the
hypotenuse is greater than right
angle edge
258
Initialization
error
reboot
Error
Cause
Correction
Hardware error
If the signal still appears after
repeatedly switching on/off the
equipment, please contact your dealer.

10
Technical Specifications
In unfavorable conditions, such as intensive sunshine, very weakly
reflecting target surface or large temperature fluctuations, measuring
accuracy may deteriorate.
Maintenance
Range (for extended
Distances, use a target
Plate)
0.05 m to 30 m
Measuring accuracy
typically：± 2mm *
Minimum unit displayed
1 mm
Laser class
II
Laser type
635 nm, < 1 mW
Automatic power off
180s
Display illumination
√
Continuous measurement
√
Battery (AAA 2×1.5V)
up to 5000 measurements
Dimensions and weight
110×38×23 mm, 100g
Temperature range:
Storage：
Operation:
-25℃ to +70 ℃
-10 ℃ to +50 ℃

11
Do not immerse the instrument into water. You can use wet soft
cloth to wipe the surface, but do not use corrosive lotion. Clean
optical components like cleaning Eyeglasses and camera lenses
（The laser emission window and receiving lens）.
Warranty
Warranty Regulations
1. The company offers two-year warranty since the purchase
date of the instrument.
2. The following conditions are beyond the warranty lists：
* Instrument of which the instrument number is deleted or
modified.
* Instrument which is repaired without authorization.
* Instrument with man-made damage or fault caused by
improper storage.
3. Warranty card with date of purchase, model, instrument
number must be provided when warranty.
Warranty Card

12
Packing list
Certificate
Name：Hand-Held Laser Distance Meter
Model：PD-53
Testing:
Date:
Instrument Model
Serial Number
Date of sales
Sale company

Sale Address
NO.
Name
quantity
unit
Remarks
1
Main body
1
pc
2
AAA
battery
2
pcs
3
User manual
1
pc