3.4.2 Controller Temperature
The LC325P has internal fans for cooling. Depending on the ambient temperature and the placement of the
controller additional cooling may be required (see Figure 22). To improve cooling of the controller, place the
device into a moving air stream. If the controller is mounted in a compact area or adjacent to additional heat
sources (e.g. a 2
nd
controller) ensure that there is sufficient ventilation.
Figure 22: Temperature curves of LC325P controller vs. flow and speed
(Typical curves for pumping pure sulfuric acid at 150°C with CP-4.25 and motor BSM-4.10)
The above curves are measurements of the controller temperature at 25°C ambient. Equation (Eq. 2) shows
how to calculate the controller temperature for at other ambient temperatures based on this curve.
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