Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur télécharger pdf (Page 25)

DTTS/DTTC Small Pipe Transducer Conguration Procedure

1. Establish communications with the transit time meter.

2. From the tool bar select Calibration. See Figure 17.

3. On the pop-up screen, press Next twice to get to Page 3

of 3. See Figure 15.

4. Press Edit.

5. If a calibration point is displayed in Calibration Points

Editor, record the information, highlight and press

Remove. See Figure 16.

6. Click ADD...

7. Enter Delta T, Un-calibrated Flow, and Calibrated Flow

values from the DTTS/DTTC calibration label, the click OK.

See Figure 2.10.

8. Press OK in the Edit Calibration Points screen.

9. Process will return to Page 3 of 3. Press Finish. See Figure

15.

10. After Writing Conguration File is complete, turn power

o. Turn on again to activate new settings.

Calibration (Page 3 of 3) - Linearization

CancelFile Op en... File S av e...

< B ack

Finish

Gal/M

Delta Tim e

1) P lease establish a

ref erence f low rate.

1FP S / 0.3MP S Minim u m .

2) E nter th e ref erence f low

rate below. ( Do not enter 0)

3) W ait f or f low to stabiliz e.

4 ) P ress th e S et bu tton.

Flow:

S et

E x p ort...

E dit

28 .2

Figure 15: Calibration points editor

Calibration Points Editor

S elect p oint( s) to edit or rem ov e:

A dd...

R em ov e

S elect A ll

S elect N one

E dit...

Cancel

30.00 ns 2000.00 Gal/Min 1.000

Figure 16: Calibration page 3 of 3

UltraLINK Device Addr 127

Device Addr 127

Flow:

Totalizer Net:

Pos:

Neg:

Sig. Strength:

Margin:

Delta T:

Last Update:

H elpW indowCom m u nicationsV iewE ditFile

P rint P rev ieP rint

1350 Gal/Min

0 OB

15.6%

100%

- 2.50 ns

09:53:39

0 OB

E rrors

Conf ig u ration CalibrationS trateg y

1600

2000

1200

S cale:60 MinTim e:

200

Figure 17: Data display screen

Model: DTTSJP-050-N000-N

S/N: 39647 Delta-T: 391.53nS

Uncal. Flow: 81.682 GPM

Cal. Flow: 80 GPM

391.53

81.682

80.000

Delta T:

Uncalibrated Flow:

Calibrated Flow:

Gal/Min.

Cancel

Edit Calibration Points

Figure 18: Edit calibration points

Mounting Transducers in Z-Mount Conguration

Installation on larger pipes requires careful measurements of the linear and radial placement of the DTTN, DTTL, and DTTH

transducers. Failure to properly orient and place the transducers on the pipe may lead to weak signal strength and/or

inaccurate readings. This section details a method for properly locating the transducers on larger pipes. This method requires

a roll of paper such as freezer paper or wrapping paper, masking tape and a marking device.

1. Wrap the paper around the pipe in the manner shown in Figure 19. Align the paper ends to within 1/4 inch (6 mm).

2. Mark the intersection of the two ends of the paper to indicate the circumference. Remove the template and spread it out

on a at surface. Fold the template in half, bisecting the circumference. See Figure 20.

3. Crease the paper at the fold line. Mark the crease. Place a mark on the pipe where one of the transducers will be located.

See Figure 10 for acceptable radial orientations. Wrap the template back around the pipe, placing the beginning of the

paper and one corner in the location of the mark. Move to the other side of the pipe and mark the pipe at the ends of

the crease. Measure from the end of the crease (directly across the pipe from the rst transducer location) the dimension

derived in Step 2, Transducer Spacing. Mark this location on the pipe.

VMOUNT AND WMOUNT INSTALLATION

Page 25 March 2014

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Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur Page 25

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