Operating manual – English
B - 12
Using the alarm function
The alarm function is automatically active in the DP mode. The alarm
triggering and intensity is determined by the
upper alarm limit
and the
lower alarm limit
.
These two alarm limits are calculated respectively from the measured
dewpoint temperature (TdP) and the thresholds, the
upper threshold
(Hi) and the
lower threshold
(Lo), defined individually in the configu-
ration area
CFG
.
The addition sum of the dewpoint temperature (TdP) and the upper thres-
hold (Hi) forms the
upper alarm limit
(TdP + Hi). The subtraction sum
of dewpoint temperature (TdP) and lower threshold (Lo) forms the
lower alarm limit
(TdP - Lo).
If the surface temperature drops below the upper alarm limit (TdP + Hi),
an acoustic alarm (buzzer) and optical alarm (laser flashes) is trig-
gered and increased in intensity proportional to approaching the
lower alarm limit.
The further the surface temperature drops, the faster the repetition
frequency of the buzzer and laser. The maximum repetition frequency
is triggered on reaching the lower alarm limit (TdP-Lo).
Example:
The current dewpoint temperature (TdP) is +2 °C. You
define the upper threshold (Hi) with 5 °C and the lower threshold
(Lo) with 5 °C. The alarm then begins at +7 °C (TdP + Hi) and reaches
maximum intensity at -3 °C (TdP-Lo).
Содержание LFE200IR
Страница 46: ...BA ITH 01 INT1...