EES-101 Series Ultrasonic Flowmeter
Revision: 3.0.1
Page 19 of 65
5
Operating Instructions
5.1
System Normal Identification
Press the
keys. If the letter "*R" displays on the screen, it indicates system normal.
If the letter "G" is displayed, it indicates that system is adjusting the signal gain prior to the measurement. Also, it
means system normal. Only when the adjustment takes too long(
＞
2min) without stopping can system be
identified as abnormal.
Letter "I" indicates no signal is being detected. Check the transducer wiring connections are correct, the
transducers are installed firmly, etc.
5.2
Zero Set Calibration
Once zero flow occurs, a zero point may indicate on each measuring instrument, but the displayed measuring
value is not equal to "0", this value indicates "Zero". To any measuring instrument, the smaller the "Zero" is, the
better the quality is. Conversely, if the Zero is too big, that indicates the quality of the instrument is poor.
If the zero set point is not at true zero flow, a measurement difference may occur. The smaller the physical
measurement capacity is, the larger the measurement difference from the zero point will exist. Only when zero
point reduced to a definite degree, as compared with the physical measurement capacity, can the measuring
difference from zero point be ignored.
For an ultrasonic Flowmeter, the measurement difference from zero point cannot be ignored at low flow. It is
necessary to perform a static zero set calibration to improve low flow measurement accuracy.
Press Window M42 to set the Zero, press
first, and then wait the readings display is finished. If this is
carried out with flow, the flow will be displayed as "0", M43 can help to restore settings.
5.3
Scale Factor
Scale factor refers to the ratio between "actual value" and "reading value". For example, when the measurement
and is 2.00, and it is indicated as 1.98 on the instrument, the scale factor reading is 2/1.98. This means that the
best scale factor constant is 1.
However, it is difficult to keep the scale factor as "1" on the instrument especially in batch productions. The
difference is called "consistency".
During operation, there still exists possible difference in pipe parameters, etc. The "scale factor" may be necessary
when used on different pipes. Thus, scale factor calibration is specially designed for calibrating the differences
that result from application on different pipes. The scale factor entered must be one that results from actual
calibration. The scale factor can be input in Window M45.
5.4
System Lock
System lock is readable but not modifiable to prevent operation error due to unauthorized tampering by
unauthorized personnel.
Press the
keys, if displays "Unlock" on the screen, then press the
key, enter 6 numerically
long password, and then press the
key to confirm.
Unlock it by using the selected password only. Press
, if "lock" is displayed on the screen, then
press the
key and enter the correct password, then press
to confirm.
Keep the password in mind or recorded in a safe place, otherwise the instrument cannot be used.
Menu
0
8
Enter
Menu
4
7
Enter
Enter
Menu
4
7
Enter
Enter