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ULTRA-E-F
PART-6 HOW TO USE MENU FUNCTIONS
Use Menu Windows for Transducer Mounting Inspection
Signal Strength
Signal strength (displayed in Window M90) indicates a detected strength of the signal both
from upstream and downstream directions. The relevant signal strength is indicated by
numbers from 00.0~99.9 in the ULTRA-E-F. 00.0 represents no signal detected while 99.9
represent maximum signal strength.
Normally, the stronger the signal strength detected, the instrument will work more reliably, as
well as the more stable the measurement value obtained.
Adjust the transducer to the best position and check to ensure that sonic couplant is applied
adequately during installation in order to obtain the maximum signal strength. System
normally requires signal strength over 60.0, which is detected from both upstream and
downstream directions. If the signal strength detected is too low, the transducer installation
position and the transducer mounting spacing should be re-adjusted and the pipe should be
inspected again. If necessary, change the mounting to the Z method.
Signal Quality (Q value)
Q value is short for Signal Quality (displayed in Window M90). It indicates the level of the
signal detected. In the ULTRA-E-F, Q value is indicated by numbers from 00~99. 00 represents
the minimum signal detected while 99 represent the maximum. Normally, the transducer
position should be adjusted repeatedly and couplant application should be checked frequently
until the signal quality detected is as strong as possible.
Transit Time Ratio (M91)
Transit Time Ratio indicates whether the transducer mounting spacing is accurate or not. If the
installation is proper, the normal transit time ratio should be 100±3%. Check it in Window
M91. If the transit time ratio is over 100±3%, it is necessary to check:
(1)
Whether the parameters (pipe outside diameter, wall thickness, pipe material, liner, etc.)
have been entered correctly;
(2)
Whether the transducer mounting spacing is accordance with the display in Window M25;
(3)
Whether the transducer is mounted at the pipe’s centerline on the same diameter;
(4)
Whether the wall thickness is too thick or the pipe mounting is distorted in shape, etc.
Total Time and Delta Time
“Total Time and Delta Time”, which displays in Window No.93, indicates the condition of the
installation. The measurement calculations in the flow meter are based upon these two
parameters. Therefore, when “Delta Time” fluctuates widely, the flow and velocities fluctuate