13
505-1320 Series Ultrasonic Open Channel Flowmeter
TM
NOTE
If type 0 (linear) is selected, set both
switches for primary device size to
zero (0).
The 505-1302 Series transmitter must be set for the type and size
of the primary device and the actual zero and span values for the
specific application. This procedure is outlined in
Sections 4.1
through 4.3
. After standard calibration, the flowrate reading
should be approximately within the 0.5% accuracy specification.
Use this procedure to select the type and size of the
primary device. See
Figure 4-1
and
Table 4-1
.
a. With the power off, select the Type of Primary Device
switch for the specific type of flume or weir.
0 - Standard (linear)
1 - Parshall Flume
2 - Rectangular Weir with End Contractions
3 - Rectangular Weir without End Contractions
4 - Cippoletti Weir
5 - V-Notch Weir
6 - Leopold Lagco Flume
7 - Palmer Bowlus Flume
b. Now set the Size of Primary Device switch in inches
(or degrees for V-notch weir applications). The middle
switch represents the tens and the lower switch
represents the units. For example, 36 inches is set
3 for tens and 6 for units.
SECTION 4
CALIBRATION
4.1 Introduction
4.2
Primary Device
Selection
NOTICE
NOTICE
Primary Device
Valid Sizes
Parshall
1"
2"
3"
6"
9"
12"
18"
24"
30"
36"
48"
60"
72"
96"
c
Rectangular
Weir with
12"
18"
24"
30"
36"
48"
60"
72"
96"
End Contractions
(greater than 96", set to 96")
Rectangular
Weir without
12"
18"
24"
30"
36"
48"
60"
72"
96"
End Contractions
(greater than 96", set to 96")
Cipoletti Weir
12"
18"
24"
30"
36"
48"
60"
72"
96"
(greater than 96", set to 96")
V-notch Weir
22
o
(22.5
o
)
30
o
45
o
60
o
90
o
Leopold-Lagco
4"
6"
8"
10"
12"
15"
18"
21"
24"
30"
Flume
36"
42"
48"
54"
60"
66"
72"
Palmer Bowlus
4"
6"
8"
10"
12"
15"
18"
21"
24"
27"
Flume
30"
36"
42"
48"
60"
72"
Table 4-1
Primary Device Selection
NOTE
When an invalid primary device
type or size is selected, Near
Zone and Lost Echo indicators
will flash. If this happens, enter
correct values or reset device
using calibration pushbutton
shown in
Figure 3-2
.
Содержание Drexelbrook 505-1320 Series
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