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Sarasota 2000 Ultrasonic Multipath
Flowmeter
Section 5, COMMISSIONING Page 5-1
Thermo Fisher Scientific
COMMISSIONING
5 COMMISSIONING
5.1 Site
dimensions
If this information is not already available, it will be necessary to carry out a dimensional
survey of the installed transducers and the channel in order to programme the flowmeter. It
will be necessary to determine the following:-
•
length, angle and the heights of each path,
•
average cross section profile, if different from that defined by the paths,
•
mean bed level (MBL),
•
height offset of the level transducers and,
•
relationship between the local heights and a fixed datum if not working with respect to
MBL.
This manual does not cover surveying techniques. However, for small sites physical
measurements are easily carried out by measurement with a tape. Angles may be determined
by triangulation.
5.2 Powering
up
Check that the flowmeter contains the specified modules and the cards are plugged in to the
correct rack positions, see Section 2. Also, Appendix 5: Site Data may already have been
partially filled in prior to shipping to indicate the card positions.
Switch on the power source and ensure that the internal power switch is on (Section 2.3).
The main STATION HOME screen will be displayed (Appendix 1: LCD Screens).
5.3 Programming
The flowmeter should be programmed as described in Appendix 1: LCD Screens.
Alternatively a PC may be used rather than the built-in screen and keyboard as shown in
Appendix 2: GAFA Screens. The programme details should be recorded to become part of
Appendix 5: Site Data.
Appendix 5: Site Data is a useful checklist covering all programmed data, some of which may
not be required for any particular site.
5.4 Setting
up
5.4.1 Ultrasonic
levels
Select “Manual” and set the gain and voltage for each level (screen C216: Level Transducer
Setup) to obtain a clean waveform and detection point (screen C218: Level Waveform
Display).
5.4.2 Auxiliary levels – analogue input
Set the input range via screen C212: Analogue Input Configuration. This allows the input to
be linearised, but most level devices will be sufficiently linear and only need 2 points to define
the input. On the table, define 4 mA as the minimum, 20 mA as the maximum and enter the
depth offset (level above datum).
Summary of Contents for HB-S2000
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