Laser Tachometer; Safety; Measure Speed; Read The Last, Highest And Lowest Values - Husqvarna Rider PR 17 Workshop Manual

Laser tachometer

Safety

• Laser product class 1.
• Exercise care when the laser beam is on.
• Do not look straight at the beam. Do not
aim the beam towards anyone else's
eyes, either people or animals.
• Do not aim the laser beam towards pol-
ished surfaces where the beam can be
reflected into someone's eyes.
• Do not aim the laser beam towards explosive gases.
• Remember when measuring.
• The reflective surface must be smaller than the non-reflective surface.
• If the object to be measured is polished, cover the measurement surface with black tape or paint with
black paint prior to attaching the reflective tape.
• Clean the surface before attaching the tape.
• When measuring at low speed, more accurate measurement values can be obtained if you attach several pieces
of tape equally distributed around the measurement object. Now divide the read measurement value with the
number of pieces of tape to get the correct speed.

Measure speed

1. Move the switch to the RPM position to measure the speed, or TOT to measure the number of revolutions.
2. Attach a small piece of reflective tape (approximately 1 x 1 cm) on the rotating object to be measured.
3. Press and hold down the measurement button on the side of the instrument. Aim the measurement laser beam at
the object and the reflective tape. The display will come on after 1–2 seconds.
4. Hold the measurement button down during the entire measurement. The instrument switches off when the
measurement button is released.

Read the last, highest and lowest values

The instrument automatically saves the last, highest and lowest measurement values during a measurement (i.e. as
long as the measurement button is held down). Press and hold down the memory button (MEM) to read the saved
values. Values are shown on the display after 1–2 seconds.
Press once
Press twice
Press three times

Replace the batteries

When the symbol for a weak battery is shown on the display, the batteries will soon be spent.
1. Open the battery cover by loosening the crosshead screw that holds the cover in position.
2. Remove the old batteries and insert new ones. Use four, 1.5 volt batteries of the type R6 (AA).
3. Make sure the batteries are turned the right way, otherwise damage can be caused to the instrument.
4. Close the battery cover and secure with the screw.

Maintenance

Clean the tachometer using a soft, damp cloth. Never use any form of solvent to clean it. Never dip it into water or
another fluid.
Do not subject the tachometer to direct sunlight, high temperatures, extreme dust or mechanical impact.
Remove the batteries if the instrument is not to be used for a long period of time.
The tachometer may only be opened by accredited technicians.
SPECIAL TOOLS
Measured value Indicated by
Last
Highest
Lowest
RPM
TOT
MEM
DIGITAL TACHOMETER
"LA"
"UP"
"DN"
7
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