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FDT-25 Handheld Ultrasonic Flowmeter
Press the ENT key under M61 for Modification. Use the dot key to skip over these digits that need
no modification.
§3.21 How to adjust the LCD contrast
Use M70 to the LCD contrast. The adjusted result will be stored in the EEPROM so that the MASTER
ERASE will make no effect on the contrast.
§3.22 How to use the RS232 serial interface
Use M62 for the setup of the RS-232C serial interface.
§3.23 How to view the Date Totalizers
Use M82 to view the date totalizers that are comprised of a daily totalizer, a monthly totalizer and
a yearly totalizer.
§3.24 How to use the Working Timer
Use the working timer to check the time that has passed with a certain kind of operation. For example,
use it as a timer to show how long a fully-charged battery will last.
Under M72, press ENT key and then select YES to reset the timer.
§3.25 How to use the manual totalizer
Use M28 for the manual totalizer. Press ENT key to start and stop the totalizer.
§3.26 How to check the ESN and other minor details
Every set of the series flow meter utilizes a unique ESN to identify the meter. The ESN is an 8-
digit number that provides the information of version and manufacturing date.
The user can also employ the ESN for instrumentation management.
The ESN is displayed in window M61.
Other details about the instrument are the total working hours displayed in window M+1, and the
total power-on times displayed in window M+4.
§3.27 How to know how long the battery will last
Use M07 to check how long the battery will last. Also please refer to §.2.1
§3.28 How to charge the built-in battery
Refer to §2.1
