34
ULTRA-E-F
accordingly. This means that the signal quality detected is too poor, it may be the resulted of
poor pipe-installation conditions, inadequate transducer installation or incorrect parameter
input. Generally, “Delta Time” fluctuation should be less than ±20
％
. Only when the pipe
diameter is too small or velocity is too low, the fluctuation can be wider.
Warnings
1.
Pipe parameters entered must be RIGHT; otherwise the flow meter will not work properly.
2.
During the installation, apply enough couplants in order to stick the transducer onto the
pipe wall. While checking the signal strength and Q value, move the transducer slowly around
the mounting site until the strongest signal and maximum Q value can be obtained. Make sure
that the larger the pipe diameter, the more the transducer should be moved. Check to be sure
the mounting spacing is accordance with the display in Window M25 and the transducer is
mounted at the pipe’s centerline on the same diameter. Pay special attention to those pipes that
formed by steel rolls (pipe with seams), since such pipe is always irregular. If the signal
strength is always displayed as 0.00, that means there is no signal detected. Thus, it is
necessary to check that the parameters (including all the pipe parameters) have been entered
accurately. Check to be sure the transducer mounting method has been selected properly, the
pipe is not worn-out, and the liner is not too thick. Make sure there is fluid in the pipe or the
transducer is not very close to a valve or elbow, and there are not too many air bubbles in the
fluid, etc. With the exception of these reasons, if there is still no signal detected, the
measurement site has to be changed.
3
Make sure that the flow meter is able to run properly with high reliability. The stronger the
signal strength displayed, the higher the Q value reached. The longer the flow meter runs
accurately, the higher the reliability of the flow rates displayed. If there is interference from
ambient electromagnetic waves or the signal detected is too poor, the flow value displayed is
not reliable; consequently, the capability for reliable operation is reduced.
4
After the installation is complete, power on the instrument and check the result accordingly.
How to Judge Whether the Instrument works Well on Site
1.
Connect the transmitter and transducer properly.
2.
Menu Setup
Note:
No matter what kind of transducer customers bought, the menu setup of transmitter
follows the below operations.
1)
Enter Menu 11, input the pipe outside diameter
“38”
;
2)
Eenter Menu 12, input pipe wall thickness
“4”
;
3)
Enter Menu 14, select pipe material
“0. Carbon steel”
;
4)
Enter Menu 16, select liner material
“0. No liner”
;
5)
Enter Menu 20, select fluid type
“0. Water”
;