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Hydraulic fan system controller: hfs – High Country Tek HFS User Manual

Page 30

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Hydraulic Fan System Controller: HFS

Fan

Full

Speed

Fan

zero

Speed

5

10

20

15

25

30

35

40

45

50

55

100%

P = 64, I = 0

Set point = 20 C

Overtemp = 30 C

Fan will go from zero to max

over 10 C.

P = 64, I = 0

Set point = 20 C

Overtemp = 50 C

Fan will go from zero to max over

30 C.

Setting the P term to 64 and the I term to 0, calibrates the controllers output to start giving current ( at the I Min
setting % ) at the „set point‟ temperature and to be at 100% output current ( I max setting % ) at the „Overtemp‟
temperature. This relationship is linear and ( depending on whether positive or negative logic is applied ) at 100%
controller output, the fan will be going at the fastest speed possible.

Temperature Sensor Information - Cont:

System Set-Up Hints:

30