Product Manual

Wall Mounted Ultrasonic Flowmeter---User Manual

LCD display, it means that modification operation is locked out. In such cases, the user should go

to M48 to have the instrument unlocked before any further modification can be made.

2.6.Quick Guide for parameters setting

In order to get the correct transducer mounting distance(the distance between the front edges of

both transducers), verify and set the following parameters;

(1) Pipe outer diameter (menu M11)

(2) Pipe wall thickness(menu M12)

Or Pipe inner diameter (menu M13)---only either one.

(3) Pipe material (menu M14)

(4) Liner (menu M16)

(5) Fluid type (menu M20)

(6) Transducer type (menu M23)

(7) Transducer mounting method type. (Please refer to transducer installing guide for detailed

method selection) (menu M24)

When the parameters above are properly set, the correct transducer mounting distance is

calculated and displayed in menu M25

(8) Solidifying parameters inputting in menu M26. (For this operation, please refer to window

M26 on chapter 3. Window Menu Details.)

ATTENTION!

It is strongly recommended to solidifying the parameters while making any small

changes.

2.7. Installing checkup

After the completion of transducer installation, user should check the following item: the receiving

signal strength S, the signal quality Q value, the delta time (travelling time difference between the

upstream and the downstream signals), the estimated liquid sound speed, the transit time ratio R,

and etc. As such, one can be sure that the flow meter is working properly and the results are

reliable and accurate.

2.7.1. Signal Strength

Signal strength S indicates the amplitude of receiving ultrasonic signals by a 3-digit number(000)

means there is no signal detected, and (999) refers to the maximum signal strength that can be

received. Note that sometimes when no confusion will introduced, S value is expressed by two

digits (00-99) for simplicity.

Although the instrument works well when the signal strength ranges from 60 to 90, stronger signal

strength should be pursued, because a stronger signal means a better result. The following methods

are recommended to obtain strong signals:

(1) If the current location is not good enough for a stable and reliable flow reading, or, if the signal

strength is lower than 60, relocate to a more favorable location.