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Ramp settings:

• Time setting of the Ramps influence the control of the pump and shouldn’t be changed

at standard operation.

• The fast Ramps 1 and 2 are determined by the type (power) of the HYDROVAR and the

type of the pump.

(Default = 4 sec.; depending on the power of the HYDROVAR they should be increased

up to 15s for higher power ratings)

• The Ramps 3 and 4 determine the speed of the internal HYDROVAR controller and

depend on the system, which has to be controlled. (Default = 70 sec.)

• The Ramps FminA and FminD are used for a fast start-up and shut off time. These

parameters especially should be used for applications where pumps or other devices are

powered, which shouldn’t work below a determined frequency for a certain time. (to

prevent damages or decrease abrasion)

To adjust the Ramps, press ▲ or ▼

Set HYSTERESIS [0315] in %

set rated REQUIRED VALUE [02]

WINDOW [0310]

setting in % of

the required

FMIN TIME

[0260]

Set HYSTERESIS [0315] in %

MIN FREQ: [0250]

RA: Ramp Fmin Acceleration Actual Value

RD: Ramp Fmin Deceleration Output Frequency

R1: Ramp 1 – speed ramp fast increase

R2: Ramp 2 – speed ramp fast decrease

R3: Ramp 3 – speed ramp slow increase

R4: Ramp 4 – speed ramp slow decrease

Time

Questions and Answers:

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ITT HYDROVAR Series Specifications

General