Laser Tachometer - Husqvarna P524 Workshop Manual

Service tools

3.1 Laser tachometer

Safety during use:
• Class 1 laser product.
• Take care whenever the laser beam is on. Do
not look straight into the beam. Do not aim the
beam towards anyone else's eyes, either
people or animals.
• Do not aim the laser beam towards polished
surfaces where the beam can be reflected into
someone's eyes.
• Do not aim the laser beam at explosive gases.
Remember When Measuring:
• The reflecting surface must be smaller than the
non-reflecting surface.
• If the object to be measured is shiny, cover the
measured surface with black tape or paint it
black before the reflective tape is affixed.
• Clean the surface before affixing the tape.
• When measuring at low speed, a more precise
reading can be obtained by fastening more
pieces of tape evenly distributed around the
object being measured. Then divide the read
value with the number of tape pieces to obtain
the real rpm.
1. Wheel speed tool
2. Reflective tape
10 – English
1
2
3
3. Laser meter
Measure rpm
1. Put the switch to RPM position for measuring
rpm or TOT for measuring the number of
revolutions.
2. Put a small piece of reflective tape (approx
1x1 cm) on the rotating object to be measured.
3. Hold the laser tachometer at right angles
max 10 cm from the tape.
4. Press in and hold the measuring button on the
side of the instrument. Aim the measuring beam
at the object and the reflective tape. The display
will light up after 1-2 seconds.
5. Hold in the measuring button during the whole
measuring procedure. The instrument is turned
off when the measuring button is released.
Read the last, highest and lowest values
The instrument will automatically save the last,
highest and lowest readings for a measurement (i.e.
as long as the measuring button is depressed).
Press in and hold the memory button (MEM) in order
to see the saved readings. The reading is shown on
the display after 1-2 seconds. Reading indicated
with:
• Press once Last "LA".
• Press twice Highest "UP".
• Press three times Lowest "dn".
Change battery in laser tachometer
The batteries are beginning to be depleted when the
low battery symbol is displayed.
1. Open the battery cover by loosening the
recessed head screw holding it.
2. Remove the old batteries and replace them with
new ones. Use 4x 1.5 volt R6 (AA) batteries.
3. Make sure to insert the batteries the right way
round or the instrument can be damaged.
4. Close the battery cover and lock it with the
screw.
Care
Clean the tachometer with a soft, damp rag. Never
use any form of solvent for cleaning.
Never dip into water or other liquid.
Do not expose the tachometer to direct sunlight, high
temperature, excessive amounts of dust or
mechanical impact.
Remove the batteries if the instrument is not being
used for long periods.
The tachometer may only be opened by an
authorized repair technician.