Ultraflux Minisonic II Portable User Manual

How to adjust the gain of the measurement signal
The details in this chapter correspond to the EXPERT mode of the parameter level menu.
Menu
Measurement config.
Probes distance
US Signal display
Auto zero
Flowrate measurement
Measurement config.
Logger
Inputs / Outputs
Low power mode
Pipe
Flowrate measurement
Pair of probes
Fluid
Filtering
Pair of probes
Probes
SE1815
Pair of probes
Type of gain
ESC
The Minisonic II can work on the positive or nega-
tive polarity of the signal.
The Minisonic II determines at each reception of
the measurement signal, the gain to be applied so
that the peak of this signal reaches the detection
threshold (example presented on a negative pola-
rity).
To this Gain must be added an additional gain, called
Margin, allowing the signal peak to be well beyond the
threshold.
The Minisonic II oers several modes of Gain and Margin adjustment
Type of gain
ESC
Automatic
ESC then Auto
Manual
Path to setting the gain type
ESC then Auto
Switching from the ESC mode (see below) to make the first measurement then definitively
in Automatic mode (see below) for the rest. This mode is to be preferred on an installation
without strong modifications of the conditions of the application, for measurements in the
long term.
ESC (Echo Shape Control)
This mode chooses the best Gain to apply to the signal as well as the best Margin. This mode
is to be preferred in the card of the use of a portable flowmeter which makes punctual mea-
surements on dierent applications.
This mode requires a few seconds of signal analysis before indicating the flow rate value.
In case of loss of signal due to a disturbance of the measurement conditions (passage of a
train of bubbles ...) the device starts a new ESC.
Automatic
In this mode, only the Gain is determined automatically, the Margin must be indicated manual-
ly. The manual setting of this Margin, if it is too important, implies that the flow measurement
can be done on a peak located in the middle of the signal. But the measure is better if it is
performed on the first alterannce. This mode is preferred on an installation without strong
modifications of the conditions of the application, for long-term measurements.
Manual
The values of Gain and Margin are determined by the user.
This mode is useful in the case where the disturbances of the signal make the gain too uns-
table for an automatic search.
Gain
threshold
Margin
threshold
Preamble
(....)
(....)

Ultraflux Minisonic II Portable Specifications

General

Brand	Ultraflux
Model	Minisonic II Portable
Category	Measuring Instruments
Language	English