Installation, Operating & Maintenance Instructions
Series 612 DN 40-50 (I.D. 1.5“ - 2”), Logic
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289419EB
2011-12-12
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3.6.2 Valve and sensor configuration
Basic valve configuration must be adapted according to application needs.
•
Definition of valve plate position (CLOSE or OPEN) after power up sequence. Default is ‘close‘.
•
Definition of valve plate position (CLOSE or OPEN) in case of a power failure. Default is ‘not defined‘.
Only for versions that have Power Fail Option equipped [612 . . - . . C . - . . . . or 612 . . - . . H . - . . . . ].
•
ZERO function. This may be ‘disabled’ or ‘enabled’. Default is ‘enabled‘. Refer also to «ZERO».
Local operation
:
(‘Control View’, ‘Control Performance Analyzer’ or
‘Service Box 2‘)
Remote operation
:
Note: It’s not possible to do ‘Valve and sensor
configuration‘ via remote operation.
1. Do power up configuration in menu
‘Setup / Valve’.
2. Do power fail configuration in menu
‘Setup / Valve’.
Note: It’s not possible to do ‘Valve and sensor
configuration‘ via remote operation.
3. Enable or disable ZERO function in menu
‘Setup / Sensor’.
4. Do sensor configuration in menu‘Setup / Sensor’.
3.6.3 ZERO
ZERO allows for the compensation of the sensor offset voltage.
When ZERO is performed the current value at the sensor input is equated to pressure zero. In case of a 2 sensor system
both sensor inputs will be adjusted. A max. offset voltage of +/-1.4V can be compensated. The offset value can be read
via local and remote operation.
Local operation
:
(‘Control View’, ‘Control Performance Analyzer’ or
‘Service Box 2‘)
Remote operation
:
(Refer to chapter: «Functions and Wiring» > «Digital
inputs» for details)
1. Send
OPEN
VALVE
2. Wait until process chamber is evacuated and
sensor signal is not shifting anymore.
Go to menu ‘Zero / ZERO’ and follow instructions.
3. Send
ZERO
Note: Do not perform ZERO as long as pressure gauge voltage is shifting otherwise incorrect pressure reading is the
result. Refer to manual of sensor manufacturer for warm up time.
Note: Do not perform ZERO, if the base pressure of your vacuum system is higher than 1‰ of sensor full scale. We
recommend disabling ZERO function in this case; refer to «Valve configuration» of the setup procedure. Otherwise
incorrect pressure reading is the result.
