User Manual for BPS-4H (High Temp.)
www.levitronix.com
PL-2009-03, Rev04, DCO# 21-101
19
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
). 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
how to calculate the controller temperature for at other ambient temperatures based on this curve.
𝑇
𝐶
(
𝑇
𝐴
) ≈ 𝑇
𝐶
(𝑇
𝐴
= 25°𝐶)
⏟
𝑠𝑒𝑒 𝐹𝑖𝑔𝑢𝑟𝑒 22
+ (𝑇
𝐴
− 25°𝐶)
𝑇
𝐶
=
𝐶𝑜𝑛𝑡𝑟𝑜𝑙𝑙𝑒𝑟 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
𝑇
𝐴
=
𝐴𝑚𝑏𝑖𝑒𝑛𝑡 𝑡𝑒𝑚𝑝𝑒𝑟𝑎𝑡𝑢𝑟𝑒
(Eq. 2)
77
97
117
137
157
0
2
4
6
8
10
12
14
25
35
45
55
65
75
0
5
10
15
20
25
30
35
40
45
50
55
[F]
[gallons/min]
[
0
C]
[liters/min]
Specific gravity = 1.8 g/cm
3
Viscosity = ~5 cP
Ambient Temp. : 25 C
3000 rpm
2000 rpm
4000 rpm
4500 rpm