Profile Ramp

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Profile Ramp

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Profile Ramp is a Target Pressure ramp that depends on pressure ranges (segments).

It is mainly used to create soft pumping or soft venting profiles.

 

To design a profile, the segments (pressure ranges) must be defined

A segment is defined by the pressure Threshold and the Slope.

It is possible to define up to 10 segments.

 

Segment

Nr

Threshold

mBar*

Resulting Segment

mBar*

Slope

mBar*/sec

1

1000

500 to 1000

50

2

500

200 to 500

100

3

200

0 to 200

200

Example: Ramp Profile with 3 segments

 

Result is a Target Pressure Ramp with different slopes.

See Target Pressure Used, which is the output of the ramp generator.

 

ProfileRamp3Segment

 

ProfileRamp3SegmentSettings

 

Parameters:

Parameter

Description

Enable

Switches on/off the function

Threshold Mode

Defines which pressure the threshold refers to

 

0 Actual Pressure

Change happens if Actual Pressure reaches the Threshold

ChangeActualPressure

 

1 Target Pressure Used

Change happens if Target Pressure Used reaches the Threshold

ChangeTargetPressureUsed

Ramp Type

Defines the shape of the ramp in each segment

0 Linear

1 Logarithmic

2 Exponential

Actual Slope

Used slope as the pressure difference per second (mBar*/sec)

Controller Selector Bitmap

Determines which Controller uses the profile ramp.

When a Controller is selected, the ramp is no longer used in the controller itself. Therefore the ramp is grayed out in the CPA.

 

PressureController

Segment Selector Bitmap

Defines which segment is used for the Profile Ramp.

Segment x Threshold

This is the upper limit of the segment.

The lower limit is defined by the next lower Threshold, or the lower limit is 0 if there is no lower Threshold

If the Target Pressure is lower than several Thresholds, the lowest one is taken.

If the Target Pressure is higher than the highest Threshold, the highest one is taken.

Segements

Segment x Slope

Defines the slope (mBar*/sec) in the segment

 

* Unit adjustable