TF1100-EH transit-time handheld flowmeter manual
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3.7 HOW TO RESET THE TOTALIZERS
Use M37 to reset the proper totalizer.
3.8 HOW TO RESET THE DEFAULT SETUPS
Use M37, when the ‘selection’ message is displayed. Press the dot key first and the message
‘Master Erase’ will display, then press the backspace key
◄
The master erase step will erase all the parameters entered by the user and setup the
instrument with default values.
3.9 HOW TO USE THE DAMPING
The damping acts as a filter for a stable reading. If ‘0’ is entered in window M40, that means
there is no damping. A bigger number brings a more stable effect. But bigger damping
numbers will prevent the instrument from acting quickly.
Numbers 0 to 10 are commonly used for the damping value.
3.10 HOW TO USE THE ZERO-CUTOFF FUNCTION
The number displayed in window M41 is called the low-cutoff value. The flow meter will
replace these flow rate values that are absolutely less than the low-cutoff value with ‘0’. This
means the flow meter will avoid any invalid accumulation when the actual flow is below the
zero-cutoff value.
The low-cutoff value does not affect the flow measurement when the actual flow is
absolutely greater than the low-cutoff value.
3.11 HOW TO SETUP A ZERO POINT
It is necessary to establish the true zero flow condition and program that set point into the
instrument. If the zero set point is not at true zero flow, a measurement difference may occur.
Because every flow meter installation is slightly different and sound waves can travel in
slightly different ways through these various installations, a provision is made in this entry to
establish “ True Zero” flow – SETUP ZERO.
There exists a ‘Zero Point’ with certain installation which means the flow meter will
display a non-zero value when the flow is absolutely stopped. In this case, setting a
zero point with the function in window M42 will bring a more accurate measurement
result. When do a calibration test, it is also very important.
Make sure that the pipe is full of liquid and the flow is absolutely stopped - securely close
any valves and allow time for any settling to occur. Then run the function in window M42
by press the MENU 4 2 keys, then press ENT key and wait until the counter readings
displayed in the lower right corner of the screen goes to “00”; thus, the zero set is
