Installation, Operating & Maintenance Instructions
Series 650, DN 100 – 250 (I.D. 4" - 10")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email reception@vat.ch www.vatvalve.com
258550EE
2007-05-11
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3.10.2.1 Gain factor adjustment
The gain factor effects:
• Stability
• Response time
Default value is 1.00. Adjustment range is from 0.0001 to 7.5.
Higher gain results in: faster response higher over- / undershoot of pressure
Lower gain results in: slower response lower over- / undershoot of pressure
Adjustment procedure:
1. Start with gain factor 1.0
2. Open valve.
3. Control a typical pressure / flow situation.
4. Repeat from step 2 with lower (higher) gain factors until optimal pressure response is achieved and stability is ok.
Note: Normally adjustments down to gain factors of 0.42 should lead to good results. Otherwise you may need to
improve sensor connection. Refer to «2.5 Requirements to sensor connection».
Local operation:
(‘Control View’ resp. ‘Control Performance Analyzer’)
Remote operation:
Go to ‘Setup / Controller’ menu.
Select gain factor.
Note: It’s not possible to do gain factor adjustment
via remote operation.
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