CRAWLER TRC 458, Руководство пользователя, Страница: 43 / 77

Because of all these changes in the atmospheric pressure, accepting the referen-
ce point as the atmospheric pressure at sea level under normal conditions will
cause an error in the altitude measurement.
In order to correct the error here and to measure the absolute altitude, we must
accept the atmospheric pressure we are at when we are down as our reference
point before climbing high (mountain, hill).
In order to do this, we must click on the B. Offset (Pressure Offset) button on the
settings page. If we return to the main page as soon as we click the button, we
will read our current elevation as zero.
If we start climbing after performing this operation, when we reach the summit,
we can read the altitude between the point we set before and the point we
reached on the main page.
This process is affected by daily changing weather conditions, so if we want to
measure continuously, this process must be repeated.
If we want to measure according to sea level again and see approximate values,
we can set our reference point as sea level by clicking the S. Level (Sea level)
button on the settings page. Depending on the weather conditions that day, we
read our elevation from the main page.
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