General Technologies TA110 Laser Tachometer and Counter - Manual (Page 2)

4.3.2 COUNT function
• Apply a reflective mark or a piece of reflective tape to the rotating
object under measurement.
• Press the “Measurement trigger” and verify that the “COUNT
Indicator” is shown in the display. If the ”COUNT” function is not
selected, press the “RPM/COUNT button” once to select the
COUNT function.
• Press the “Measurement trigger” and aim the laser beam at the
reflective mark or tape on the rotating object.
• Verify that the “On Target indicator“ appears on the display,
indicating that the instrument is detecting the rotation of the
object and the reflective mark on it.
• Proceed to read the revolution count on the digital display.
4.3.3 Reflective marks
• Cut a 1/2” (1.25 cm) length of the reflective tape provided, peel off
the backing to expose the adhesive, and attach it to the rotating
part or shaft to measure, following theserecommendations:
- The non-reflective area must always be larger than the
reflective piece of tape.
- If the object or shaft to be measure is reflective, it must first
be covered with a black tape or painted black before attaching
the reflective tape.
- Before applying the tape ensure that the surface is clean and
smooth .
4.3.4 Very low RPM measurements
The response time will vary with the rotational speed being
measured, therefore when measuring very slow rotating parts, it
may be advantageous to follow the procedure below to increase
the update rate of the measurement:
• Depending on the size of the rotating object or shaft, attach multiple
reflective marks, evenly spaced along its circumference.
• Proceed to measure RPM as described in 4.3.1, and divide the
reading by the number of reflective marks, in order to obtain the
correct RPM.
4.4 Other Functions
4.4.1 Display hold
• The instrument will automatically hold the last display reading
when the “Measurement trigger” is released, and hold it until the
“Measurement trigger” is pressed again or the unit turns itself off
(automatic shut off).
4.4.2 Display backlight
• Make sure the instrument is turned ON, if it is not, press the
Measurement Trigger.
• Pressing the “Display backlight button”, will turn the display
backlight ON or OFF. When the backlight is on the “Backlight
indicator” will be shown in the display.
• When the backlight is not needed, turn it off to prolong battery
life.
4.4.3 MAX and MIN functions
In every measuring cycle (a measuring cycle starts when the
“Measuring trigger” is pressed, and finishes when the “Measuring
trigger” is released), the instrument will automatically store in its
internal memory the maximum and minimum values measured. To
retrieve these values from memory, follow the procedure described
below:
• With the instrument on, press once the “MAX button”, the ‘MAX’
indicator will appear on the display, and the maximum value stored
in memory will be shown. Once the MAX function is selected, if
the “Measurement trigger” is pressed again, the maximum value
will be cleared and then updated with the new measurements. To
turn the MAX function off, press the “MAX button” once.
• With the instrument on, press once the “MIN button”, the “MIN
indicator” will appear on the display, and the minimum value stored
in memory will be shown. Once the MIN function is selected, if
the “Measurement trigger” is pressed again, the minimum value
will be cleared and then updated with the new measurements. To
turn the MIN function off, press the “MIN button” once.
Note: The values stored in memory (maximum and minimum) will
be deleted when the unit turns itself off (automatic shut off),
or when a new measuring cycle is started.
5. MAINTENANCE
5.1 Battery replacement
• When the battery is depleted and needs to be replaced, the “Low
battery warning” symbol will appear on the lower left hand side of
the display.
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General Technologies Corp.
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Pull to open
battery cover
Battery
• To replace the battery, open the battery compartment cover
(located at the front of the handle) by pulling on the finger indents
near the trigger, and remove the battery.
• Replace with a new 9 V alkaline battery type NEDA 1604 or
IEC6F22 observing the proper polarity when connecting to the
battery terminals.
• Close the battery cover.
5.2 Cleaning
5.2.1 Lens cleaning
Debris or dirt on the lens may cause obstruction and reduce the
accuracy of the tachometer. If this occurs, either wipe the lens with
a Q-tip (moistened with water only) or blow the loose particles off
with clean compressed air. Do not use solvent on the lenses, as it
may damage the instrument.
5.2.2 Exterior cleaning
Periodically wipe the case with a soft damp cloth and mild household
cleanser. Do not use abrasives or solvents; ensure that no water
gets inside the instrument to prevent possible short circuits and
damage.
6. WARRANTY
One year limited warranty, excluding batteries and fuses. For
details see the Standard Warranty Information on our web page or
you may request a printed copy.