Instruction Manual

Measurement Mode

The Measurement Mode is changed with the Measurement Mode Selector

switch. There are three basic settings USB, Standard and Average.

The switch is located on the side of the tachometer (See Description of Parts

Section).

Average USB Standard

Measurement

mode

Explanation

USB Mode

Features:

• DT-209X takes online measurements via USB cable.

• Downloads data from Standard and Average Mode.

Please refer to the API manual for additional information.

Standard mode

• DT-209X takes measurements while the power button is

pressed.

• There are 24 memory blocks that can be stored; each

block contains 10 data points. To store data in memory,

the power button is held and the memory button is

pressed once. This routine is repeated for every

measurement that needs to be captured. After all the 10

data points are used a “FULL” indicator is displayed on

the LCD screen. Arbitrarily less than 10 data points can

be stored in memory.

• Moving from one data block to the next requires the

release of the power button. When recording is resumed

the display will show “n” followed by a number indicating

the existing memory block location, where data will be

stored.

• Holding the memory button for 5 seconds clears the

stored memory per block.

• If the memory button is not pressed while the power

button is activated, the data will not be stored for that

period of time.

NOTE: In USB mode recorded data is downloaded directly to the computer.

Auto power off feature of the tachometer is disabled; the supply of power for

the unit is coming from the host computer.