TF1100-EH transit-time handheld flowmeter manual
8
press ENT key.
Refer to
2.7.2
Transducer Mounting Mode
for detail.
(8) When above steps finished, Menu 25 will display transducer install spacing.
Refer to
2.7.1
for detail.
(9)
Enter Menu 90 and 91, to adjust the transducer spacing for good run status. Try to
move one transducer, let this value closer to 100.0%. Meter display will be more
accurate.
Please read Part 4, Menu Windows details, it will help you have a good operation.
The first-time users may need some time to get familiar with the operation. However, the
user friendly interface of the instrument makes the operation quite easy and simple. Before
long, the user will configure the instrument with very little key pressing, since the interface
allows the user to go to the desired operation directly without any extra steps.
The following tip will facilitate the operation of this instrument.
(1) When the window display is between M00 to M09, press MENU key, then press a
number key x , the user will go directly to the M0x window. For example, if the current
window displays M01, press 7 and the user will go to M07.
(2) When the window display is under M00 to M09, press the ENTER key and the user will
go to Menu90; Menu 90 display the meter run status, press ENTER key to return. Press
the dot key to go to M11
2.6 TRANSDUCERS MOUNTING LOCATING
The first step in the installation process is the selection of an optimum location in order to
obtain a more accurate measurement. For this to be completed effectively, a basic knowledge
about the pipe straight running would be advisable. An optimum location would be defined
as a straight pipe length full of liquid that is to be measured. The piping can be in vertical or
horizontal position. The following table shows examples of optimum locations.
Principles to selection of an optimum location
(1)
Install the transducers on a longer length of the straight pipe. The longer the better, and
make sure that the pipe is completely full of liquid.
(2)
Make sure that the temperature on the location does not exceed the range for the
transducers. Generally speaking, the closer to the room temperature, the better.
(3)
Take the pipe fouling into consideration. Select a straight length of a relatively newer
pipe. If the condition is not satisfying, consider the fouling thickness as part of the liner
for a better result.
(4)
Some pipes have a kind of plastic liner, and between the outer pipe and the liner there may
be a certain thickness difference that will prevent the ultrasonic waves from direct
traveling. Such conditions will make the measurement very difficult. Whenever possible,
try to avoid this kind of pipes. If impossible, try our plug-in transducers that are installed
permanently on the pipe by drilling holes on the pipe while liquid is running inside.
