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Installation, Operating & Maintenance Instructions
Series 615 DN 40 (I.D. 1.5”), RS485
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289111EB
2013-02-05
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3.11.1.4 Valve speed adjustment
Valve speed effects:
Response time
Default value is 1000. Adjustment range is from 1 to 1000.
This parameter effects valve plate actuating speed.
Speed adjustment is effective for PRESSURE CONTROL and POSITION CONTROL.
Note:
Normally best pressure control response is achieved with max. valve speed. In particular applications it may be of
advantage to have a slower valve response.
Note:
OPEN and CLOSE are always done with max. speed.
Adjustment procedure:
1. Use optimal gain factor, sensor delay time and setpoint ramp according to preceding tuning steps.
2. Open valve.
3. Control a typical pressure / flow situation.
4. Repeat from step 2 with slower valve speed until required response is achieved.
Local operation
:
(„Control View‟, „Control Performance Analyzer‟ or
„Service Box 2„)
Remote operation
:
(Refer to chapter «RS485 setup commands» for
details)
Go to „Setup / Control Parameter‟ menu. Select valve
speed.
Send VALVE SPEED
3.11.1.5 Required information for support (in case of unsuccessful tuning procedure):
Go to „Tools / Create Diagnostic File‟ in „Control View‟ resp. „Control Performance Analyzer‟ and save file
Pressure / flow / gas conditions to be controlled
Chamber volume
Pumping speed (l/s) and pump type (e.g. turbo pump)
System description
Problem description
Send diagnostic file with and all required information to