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Sarasota 2000 Ultrasonic Multipath
Flowmeter
Section 2, SYSTEM COMPONENTS, Page 2-16
Thermo Fisher Scientific
SYSTEM COMPONENTS
The 500 kHz transducers have the HT and signal amplifiers built in. They are connected
directly to the flowmeter or via star boxes. If ultrasonic depth transducer(s) are being used, it
is usual to use 500 kHz frequency when that frequency is being used for water velocity
measurement.
The transducers are supplied with 5 metres of cable which is connected to a star box or
extended to run directly to the flowmeter. Coaxial cables to the flowmeter enclosure are
usually made up on site. Cables may be supplied to length if so ordered with made up ends
but this often makes the installation more difficult where there is the need to pull cables
through ducts.
2.4.3 Lower frequency transducers
Consult Thermo Fisher Scientific about low frequency transducers for path lengths above 80
metres or where conditions might attenuate higher frequency signals.
If ultrasonic depth transducer(s) are being used, it is usual to use 500 kHz frequency when
lower frequency transducers are being used for water velocity measurement.
2.4.4 Maximum
cable
lengths
Item From
To
Max
length
Comment
1
500 kHz transducer
(velocity or depth)
Flowmeter 300
m
Direct
connection
2 1
MHz
TBox
(velocity or depth)
Flowmeter 300
m
Direct
connection
3
Star box
Flowmeter
300 m
Multi-drop
(but see depth options items 6 & 7)
4
500 kHz transducer
Star box
5 m
Multi-drop
(but see depth option item 6)
5
1 MHz Tbox
Star box
5 m
Multi-drop
(but see depth option item 7)
6
500 kHz depth transducer
Star box
50 m
Multi-drop depth option
(star box max 5 m from flowmeter)
7 1
MHz
depth TBox
Star box
50 m
Multi-drop depth option
(star box max 5 m from flowmeter)
Содержание HB-S2000
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