Instruction Manual
20
The Memory Button is pressed and then 
released. 
The minimum measured value is 
displayed. 
The memory button is pressed and then 
released. 
The calculated average value is displayed. 
Pressing the memory button cycles back 
to LST. Note: Only the last Memory block 
is accessible for review. To review all 
blocks download data to the DT-209X 
software 
Other Functions
Memory deletion 
Pushing the Memory Button for 5 seconds 
or more clears the last memory block 
stored in the tachometer. 
The LCD display will show “CCCCC” 
indicating that one block of memory has 
been deleted. 
RPM 
60
MIN
AVE 
4500
RPM 
1234
N08 
CCCCC 










