Manual Aqua M300D
page 21
The functions and setting options of these parameters will be explained in detail in the following chapters.
9.3 Normal Measuring with Acoustic Feedback
NOTE:
Information on the displayed values:
The
Aqua M300
hydrogen sensor is capable of detecting highly resolved hydrogen concentrations from 10 to
20.000 ppm. The
Aqua M300
displays the detected hydrogen concentrations as digits but without any
accompanying unit in a range from 0 to 1,000 digits.
Note
: The correlation from display and hydrogen
concentration is not linear, but logarithmic. The displayed digital value does not automatically correspond with
the ppm value!
Starting Measuring:
Press the left-hand button on the central unit to start a measurement. The measurement will be continued until
the button is pressed to discontinue measuring.
A pulsating record symbol (2) indicates that measuring is being carried out.
The current measuring value is displayed numerically on the digital display (3) and on the right-hand bar display
(4) also numerically and as a bar. The displayed values are shifted by one measuring interval.
The display will increase if you get closer to an area with a higher hydrogen concentration. The value decreases
again when you move away from this area or enter adjoining areas with lower hydrogen concentrations.
There is a hydrogen concentration of 145 digits on the display as shown in the example.
Activating Acoustic Feedback
:
As it may become difficult to keep an eye on the display the whole time while trying to detect the direction which
the biggest trace gas increase is coming from, the Aqua M300 is also equipped with an acoustic feedback to
assist you during leak detection.
The Aqua M300 features an acoustic signal display which is connected to a piezo element and is also capable of
transmitting a signal tone to the connected headphones.
The acoustic feedback is initially set to “deactivated“.
To activate the acoustic feedback, navigate to the measuring tone symbol (5) or to the headphone symbol (6)
with the dial on the right and activate the symbol by pressing the right-hand dial or by directly touching the
symbols on the touch screen.
When the acoustic feedback has been activated, the sound is emitted via both the connected headphones as
well as the internal piezo element.
The sound is emitted in the same volume and the same frequency via the piezo element. The tone frequency
increases when the measuring values increase and decreases when the measuring values decrease.