Aktek AT300 Manuel de l'utilisateur - Page 11

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beneath the transducer, and that the transducer is seated flat against the material. If the

condition persists, it may be necessary to select a different transducer (size or frequency)

for the material being measured.

While the transducer is in contact with the material that is being measured, the

instrument will perform four measurements every second, updating its display as it does so.

When the transducer is removed from the surface, the display will hold the last

measurement made.

Note：Occasionally, a small film of couplant will be drawn out between the transducer and

the surface as the transducer is removed. When this happens, the gauge may perform a

measurement through this couplant film, resulting in a measurement that is larger or smaller

than it should be. This phenomenon is obvious when one thickness value is observed while

the transducer is in place, and another value is observed after the transducer is removed. In

addition, measurements through very thick paint or coatings may result in the paint or

coating being measured rather than the actual material intended. The responsibility for

proper use of the instrument, and recognition of these types of phenomenon, rests solely

with the user of the instrument.

4.5 Scan mode

While the gauge excels at making single point measurements, it is sometimes desirable

to examine a larger region, searching for the thinnest point. The gauge includes a feature,

called Scan Mode, which allows it to do just that.

In normal operation, the gauge performs and displays four measurements every

second, which is quite adequate for single measurements. In Scan Mode, however, the

gauge performs ten measurements every second, and displays the readings while scanning.

While the transducer is in contact with the material being measured, the gauge is keeping

track of the lowest measurement it finds. The transducer may be "scrubbed" across a

surface, and any brief interruptions in the signal will be ignored. When the transducer loses

contact with the surface for more than two seconds, the gauge will display the smallest

measurement it found. When the transducer is removed from the material being scanned,

the gauge will display the smallest measurement it found.

When the scan mode is turned off, the single point mode will be automatically turned on.

Turn on/off the scan mode by the following steps:

Press the

key to switch the scan measurement mode on and off. It will display the

current condition of the scan mode on the main screen.

4.6 Changing Resolution

AT300 has selectable display resolution, which is 0.1mm and 0.01mm. This function is

not available for other models, which is fixed to 0.1mm.

Press down the

"High" and "Low".

key while turning on the gauge will switch the resolution between