General Technologies TA300 SmarTach D : Digital Diesel Engine Tachometer - Manual (Page 3)

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3. OPERATION
3.1 Instrument Description
1) Protective rubber holster
2) LCD Display
3) Power ON/OFF / Reset button
4) Sensitivity Increase button
5) Number of Cycles button
6) Sensitivity Decrease button
7) Trigger Level Adjust function button
8) Piezoelectric sensor
9) Gound clip
MIN - Minimum reading
• Displays the minimum reading during the measurement. When the RPM function is
being used the readings are shown in 10s of RPM, and to obtain the correct RPM
readings they should be multiplied by 10. The minimum value is automatically reset
when turning the unit off or it can be manually reset by momentarily pressing the Power
On/Off / Reset button.
Cycles - Number of Cycles
• Displays the selected number of cycles: 2 and 4.
Measurement units
• Displays the measurement unit: RPM
Measurement reading
• Displays the measurement.
3.3 Buttons description and operation
3.3.1 Power ON/OFF and Reset
• When the instrument is OFF, to turn it ON press the Power ON/OFF / Reset
button until the unit turns on (in approximately 1 second).
• When the instrument is ON, to turn it OFF press and hold the Power ON/OFF
/ Reset button until the display turns off (in approximately 3 seconds).
• When the instrument is ON, press momentarily the Power ON/OFF / Reset
button to reset the Maximum and Minimum values.
Note: To extend battery life, the TA300 will automatically turn off after 3 minutes of being
idle (i.e. no button pressed and no input signal). Turning the unit off manually,
when not in use will prolong battery life.
3.3.2 Number of cycles
• Press the Number of cycles button to select the number of cycles for the
engine under measurement. Each time the button is pressed the number of
cycles will change between 2 cycles and 4 cycles. The selected setting will
show on the display.
3.3.3 Trigger Level Adjust
• Press and hold the Trigger Level Adjust button to enable the trigger level adjust
function. After this button is pressed, the display will show the current trigger
level (50% is the default setting), and the trigger level can be adjusted by using
the Sensitivity Increase or Sensitivity Decrease buttons to increase or decrease
it.
3.3.4 Sensitivity Increase and Decrease buttons
• The first time the Sensitivity Increase button is pressed, the display will show
the sensitivity setting, and each time the button is pressed again it will increase
the signal sensitivity of the TA300. A few seconds after the button is released
the display will resume to show Maximum and Minimum readings.
3.2 LCD Display
3.2.1 LCD Display description
Low battery indicator
• This message warns the battery voltage is below the minimum recommended and it
needs to be replaced with a new battery.
• If the battery voltage is low, but still allows for the operation of the instrument, the low
battery indicator will turn and stay on until the battery is replaced with a new one.
Note: If the unit turns off immediately after being turned on, it indicates that battery
voltage is below the absolute minimum, and the battery should be replaced to prevent
malfunction.
MAX - Maximum reading
• Displays the maximum reading during the measurement. When the RPM function
is being used the readings are shown in 10s of RPM and to obtain the correct RPM
readings they should be multiplied by 10. The maximum value is automatically reset
when turning the unit off or it can be manually reset by momentarily pressing the
Power On/Off / Reset button.
Fig. 1 - Instrument description
Fig. 2 - LCD Display
Maximum reading (x10)
Minimum reading (x10)
Measurement units
Low battery indicator
Number of cycles
Measurement reading
Sensitivity Increase
Sensitivity Decrease Trigger Level Adjust Number of Cycles