Dynasonics TFXL Clamp-On Ultrasonic Flow User Manual download pdf (Page 24)

24 06-TTM-UM-00158 8/2012

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Calibration (Page 2 of 3) - General Setup

1) Please establish a

reference flow rate.

1FPS / 0.3MPS Minimum.

2) Enter the reference flow rate

below. (Do not enter 0)

3) Wait for flow to stablize.

4 Press the Set button.

Gal/MIN

Delta Time

Flow:

Export...

Edit

FIGURE 4.9  CALIBRATION PAGE 3 OF 3

Zero values are not valid for linearization entries. Flow meter

zero is entered on Page 1 of 3. If a zero calibration point is

attempted, the following error message will be shown:

Value can not be 0.

This value was already set in a previous screen (Page 1 of 3).

UltraLINK

Press the Finish button when all points have been entered.

TARGET DBG DATA SCREEN  DEFINITIONS

1) Calc Count - The number of  ow calculations performed

by the meter beginning at the time the power to the meter

was last turned o and then on again.

2) Sample Count - The number of samples currently being

taken in one second.

3) Raw Delta T (ηs) - The actual amount of time it takes for

an ultrasonic pulse to cross the pipe.

4) Course Delta T - The TFX series uses two wave forms. The

coarse to  nd the best delay and other timing measurements

and a  ne to do the  ow measurement.

5) Gain - The amount of signal ampli cation applied to the

re ected ultrasound pulse to make it readable by the digital

signal processor.

6) Gain Setting/Waveform Power - The  rst number is the

gain setting on the digital pot (automatically controlled by

the AGC circuit). Valid numbers are from 1 to 100. The second

number is the power factor of the current waveform being

used. For example, “8” indicates that a ⁄ power wave form is

being used.

7) Tx Delay - The amount of time the transmitting transducer

waits for the receiving transducer to recognize an ultrasound

Target D/jointfilesconvert/1417652/bg Data

Reset

Device Type:

TFX

Tx Delay:

413

Flow Filter:

Sound Speed:

4900

Serial No (TFXD):

Calc Count:

2.2 CPS

54247

Raw Delta T (ns):

0-10.73

Gain:

66/8

430

SS (Min/Max):

8.0/92.4

910

Reynolds:

0.7500

20.15

12 13

signal before the transmitter initiates another measurement

cycle.

8) Flow Filter - The current value of the adaptive  lter.

9) SS (Min/Max) - The minimum and maximum signal

strength levels encountered by the meter beginning at the

time the power to the meter was last turned o and then on

again.

10) Signal Strength State - Indicates if the present signal

strength minimum and maximum are within a pre-

programed signal strength window.

11) Sound Speed - The actual sound speed being

measured by the transducers at that moment.

12) Reynolds - A number indicating how turbulent a  uid

is. Reynolds numbers between 0 and 2000 are considered

laminar  ow. Numbers between 2000 and 4000 are in transi-

tion between laminar and turbulent  ows and numbers

greater than 4000 indicate turbulent  ow.

13) Reynolds Factor - The value applied to the  ow calcula-

tion to correct for variations in Reynolds numbers.

SAVING METER CONFIGURATION ON A PC

The complete con guration of the  ow meter can be saved

from the Con guration screen. Select File Save button

located in the lower left-hand corner of the screen and

name the  le. Files are saved as a *.dcf extension. This  le

may be transferred to other  ow meters or may be recalled

should the same pipe be surveyed again or multiple meters

programmed with the same information.

PRINTING A FLOW METER CONFIGURATION REPORT

Select File from the upper task bar and Print to print a cali-

bration/con guration information sheet for the installation.

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Dynasonics TFXL Clamp-On Ultrasonic Flow User Manual Page 24

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