Dynasonics TFX Ultra Transit Time Flow Meters - Manual (Page 25)

DTTS/DTTC Small Pipe Transducer Configuration 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 Configuration File is complete, turn power
off. Turn on again to activate new settings.
Calibration (Page 3 of 3) - Linearization
Cancel File 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 A ll
S elect N one S elect N one
E dit...
Cancel OK
30.00 ns 2000.00 Gal/Min 1.000 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 elp W indow Com m u nications V iew E dit File
P rint P rev ie P rint
1350 Gal/Min
0 OB
15.6%
100%
- 2.50 ns
09:53:39
0 OB
0 OB
E rrors
!
Conf ig u ration Calibration S trateg y
1600
2000
1200
S cale: 60 Min Tim e: 200
U
U
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:
ns
Gal/Min.
Gal/Min.
Cancel OK
Edit Calibration Points
Figure 18: Edit calibration points
Mounting Transducers in Z-Mount Configuration
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 flat 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 first 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