UMSUMS - USER GUIDE
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ionised”. For precis
e control of the water quality it is recommended that the user procures both a
dissolved air (and at least dissolved oxygen) and conductivity meter and closely monitors these water
properties. The conductivity of the degassed water should be less than 4 uS/cm (1) and the dissolved
oxygen content between 5-8 ppm or <4 ppm for high powers (>10W) (2).
At Precision Acoustics the test tank water is changed approximately every 3 to 6 months.
(1)
IEC 62127 part 1
(2)
NEMA UD-2
Digital Storage Oscilloscope
The UMS is designed to operate with digital storage oscilloscopes from the Keysight DSOX range. These
high specification digital storage oscilloscopes (DSO) are used for all data acquisition and also handle all
the data transfer back to the host PC by means of onboard Ethernet or GPIB communication. Support for
other oscilloscopes may be available, for further information please contact us with your specific model.
Host PC
NOTE: the host PC login password is set to ACOUSTICS or Measurement.
This PC runs the UMS Software that is at the heart of the UMS. If you have purchased a PC for this purpose
from PAL, all the necessary software will have been pre-installed. If however you are using your own PC
then further set up will be required. Once assembled, the PC will use a USB port to interface with the
Stepper Motor Drive Control Unit (section 2.4). The PC communicates with the DSO via an Ethernet (RJ45)
connector. All data acquired by the DSO is also passed back to PC for storage and subsequent post
processing.
UMS Software
The ultrasonic measurement system is controlled from the Host PC by means of dedicated LabVIEW
based software. UMS software application controls all aspects of the operation of the system including:
•
Initialisation of communication interfaces
•
Motion of the stepper motor actuators
•
Waveform acquisition by the oscilloscope and subsequent transfer of data to the host PC
•
Acquisition and storage of temperature data
•
Archival and post-processing of acquired data
SYSTEM SETUP
A schematic overview of the installation of the UMS system is shown in the figure below.
