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6.4.1.2 Operating modes of MiniTest 440
This gauge offers two different operating modes:
•
I-E: Impulse-Echo mode (pulse-echo)
Available with all transducer models.
•
E-E: Echo-Echo mode
Only available with the U5.0E transducer for
the measurement of wall thickness through a
coating.
6.4.1.2.1 I-E mode
The pulse-echo (I-E) mode offers five different measuring modes. Please select the correct mode
according to your measuring requirements and conditions.
Standard mode: The current reading is shown. This mode applies if you are satisfied with the
standard measuring needs.
Minimum mode: In this mode, the lowest values is shown during measurement. This mode is
recommended for curved surfaces or if it is required to indicate the lowest thickness values. This
would be a typical application of tube measurement.
Important note: This mode is NOT recommended for cast iron or Aluminium alloys.
Difference mode: If you have adjusted a set point previously, this mode will indicate the difference
between the current reading and set point. This mode is particularly suitable for quality inspection
and if it is required to identify the products within the admissible thickness tolerance range.
Alarm mode (Limitation): In this mode, a visual alarm will be given once the upper or lower limit
(if set previously) has been exceeded. This mode enables a quick and easy checking of readings
so that a permanent monitoring of readings will not be necessary. In practical operation, this mode
is more frequently used than the “Difference mode“.
Scan mode (high-performance mode): This mode is particularly suited for measurement on high-
temperature samples.
