High-country-tek HFS-2Q Manual do Utilizador descarregar pdf (Página 13)

Hydraulic Fan System Controller : HFS - 2

Fan ‘MAX speed’ setting:

This is called ‘ Max Vlv Current %’ in the software and allows current to be adjusted from 0 – 100 % PWM output.

If Max Valve Current is set to zero (0) all other settings will also go to zero.

Fan ‘MIN speed ‘setting:

This is called ‘ Min Vlv Current %’ in the software and allows current to be adjusted from 0 – 100 % PWM output

set by ‘Max Vlv Current’ above.

Ramp Settings:

The user programmable ramp Up and Down times are applied to limit the controllers rate of change in output

current to a value that prevents damaging the hydraulic system components and the fan blades.

The ramp rate is set in seconds (s) for a full scale current output change in the range of 1 to 10 seconds.

This ramp time should be set low enough not to interfere with the temperature control loop response but high

enough to give smooth system operation.

The set-up software allows the dither frequency ( PWM frequency ) to be set from ~30Hz to ~250Hz to cater for the

known range of proportional valves that could be used for this application.

Dither Frequency Settings:

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 35 36

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High-country-tek HFS-2Q Manual do Utilizador Página 13