General Technologies TA110 User Manual

General Technologies Corp.

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TA110

Laser Optical Tachometer

1. SAFETY RULES

• This instrument is designed for indoor use at temperatures
between 32°F and 122°F (0°C to 50°C), and altitudes up to 6500
ft. (2,000 m), and 10% to 90% relative humidity.

• To ensure that the instrument is used safely, follow all safety and
operating instructions in this manual. If the instrument is not used
as described in this operation manual, the safety features of this
device may be impaired.

• To avoid personal injury and damage to the instrument use extreme
caution when working around hot or moving objects or machinery
(i.e.: radiators, exhaust manifolds, catalytic converters, drive belts,

y wheels)

2. INTERNATIONAL SYMBOLS

Important information
Refer to the User’s Manual

4. OPERATION

4.1 Instrument Description

1) Digital display

2) Display backlight button

3) Minimum button

4) Maximum button

5) RPM/Count button

6) Laser output

7) Measument trigger

8) Battery compartment cover

4.2 Display Description

CAUTION: Laser radiation
AVOID DIRECT EYE EXPOSURE
1mW Output at
Class II Laser Product

630-670 nm

HOLD indicator

On Target indicator

Depleted battery

warning

Backlight indicator

Laser output warning

Numeric reading

3. TECHNICAL SPECIFICATIONS

3.1 General Specications

Display: 5 digit 0.7” (16mm) LCD, max. of 99999

display, with measuring unit indicator
and Laser On Target indicator

Accuracy:

Operating temperature:

Response time: 0.5 sec. (over 120 RPM)

Range selection: Auto Ranging

Memory: Maximum, Minimum, and display

Distance to target: 2” to 20” (50 mm to 500 mm)

Laser pointer: Laser Diode, < 2mW output

Power source: 9-volt battery type NEDA 1604,

Battery life: Approx. 5 hours (w/alkaline batteries)

Power saving: Automatic shut off after 10 seconds

Dimensions: 3.13”x 1.88”x 7.0” (80 x 48 x 178 mm)

Weight: 7.6 oz. (215 g) including battery

Accessories: User’s manual, soft pouch, 3 x 20 cm

±(0.05%+1 Digit)

32°F to 122°F (0°C to 50°C)

hold.

wavelength 630-670 nm, Class II

IEC6F22 IEC 6LR61

reective autoahesive tape and 9 V

alkaline battery

3.2 Measurement Specications

• Accuracies are ±(% of reading + number of least signicant dig-

its) at 23°C ±5°C ambient temperature, with less than 75% RH.

Function Range Acuracy Resolution

RPM

COUNT

(total revolutions)

1 to 99,999 RPM ±(0.05%+1 Digit) 1 RPM

1 to 99,999

±(0.05%+1 Digit)

1 COUNT

MAX indicator

MIN indicator

RPM indicator

COUNT indicator

4.3 Measurement Procedures

CAUTION: Avoid contact with moving and/or

hot components, to prevent personal
injury or damage to the instrument.

CAUTION: Laser radiation is emitted

Avoid direct eye contact

4.3.1 RPM Measurement

Reective

tape

• Apply a reective mark or a piece of reective tape to the

rotating object under measurement.

• Press the “Measurement trigger” and verify that the “RPM
Indicator” is shown in the display. If the RPM function is not
selected, press the “RPM/COUNT button” once to select the
RPM function.

• Press the “Measurement trigger” and aim the laser beam at the

reective 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 reective mark on it.

• Proceed to read the RPM on the digital display.

Laser beam

2 to 20”

5 to 50 cm

4.3.2 COUNT function

• Apply a reective mark or a piece of reective 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

reective 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 reective mark on it.

• Proceed to read the revolution count on the digital display.

4.3.3 Reective marks

• Cut a 1/2” (1.25 cm) length of the reective 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

reective piece of tape.

- If the object or shaft to be measure is reective, it must rst

be covered with a black tape or painted black before attaching

the reective tape.

- Before applying the tape ensure that the surface is clean and
smooth .

• 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.

Pull to open
battery cover

Battery

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

reective marks, evenly spaced along its circumference.

• Proceed to measure RPM as described in 4.3.1, and divide the

reading by the number of reective 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 nishes 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.

• To replace the battery, open the battery compartment cover

(located at the front of the handle) by pulling on the nger 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.

General Technologies Corp.

#121 - 7350 72nd Street Tel.: [phone]
Delta, BC Fax: [phone]
Canada V4G 1H9 www.generaltechnologies.net

© Copyright 2009 General Technologies