Larson Davis PRM2103, Справочное руководство

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PRM2103 Reference Manual PRM2103 Heater Controls 3-3
3.3 PRM2103 Heater Controls
The PRM2103 includes a heater to provide protection from condensation
to the microphone. The heater state can be specified for one of four
settings: Off, Low, High, or Auto. The default setting is Auto, which is
recommended for most applications.
3.3.1 Manual Mode
• Off: The heater remains off in all conditions.
• Low: The heater remains on continuously at low power.
• High: The heater remains on continuously at high power.
3.3.2 Automatic Mode
The Auto mode alternates between three states automatically, according
to the PRM2103 internal temperature and internal relative humidity. The
states are as follows:
Off: The heater remains off.
Low: The heater turns on at low power when the PRM2103 internal
relative humidity exceeds 65% or internal temperature drops below 5°C.
The heater turns off when the relative humidity decreases below 60% or
the temperature rises above 5°C.
High: The heater turns on high when the PRM2103 internal relative
humidity exceeds 70% or when the internal temperature drops below 3°C.
When the relative humidity decreases below 65% or the internal
temperature rises above 3°C the heater switches to low.
Figure 3-3 shows the PRM2103 automatic heater states for internal
temperature and relative humidity variations.
FIGURE 3-3 PRM2103 Heater Control Settings