INSTALLATION Series
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Edition 2014-07-10 605451EC
4.5.4 Sensor configuration
Basic sensor configuration must be adapted according to application needs.
• ZERO function: This may be ‘disabled’ or ‘enabled’. Default is ‘enabled‘. Refer also to chapter
«ZERO».
• Sensor configuration with 2 sensor version [651 . . - . . . E - . . . .]. Refer also to chapter: «Pressure
control operation with 2 sensors».
Local operation:
(‘Control Performance Analyzer’ or ‘Service Box 2‘)
Remote operation:
With CPA:
• Do sensor configuration in menu ‘Sensor /
Setup’.
With SB2:
• Enable or disable ZERO function in menu
‘Setup / Sensor’.
• Do 2 sensor configuration in menu ‘Setup
/ Sensor’.
It’s not possible to do ‘Sensor
configuration‘ via remote operation.
4.5.5 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 Performance Analyzer’ or ‘Service Box 2‘)
Remote operation:
(Refer to chapter «Digital inputs» for details)
With CPA:
• Do the ZERO in menu ‘Sensor / Zero’.
With SB2:
• Go to menu ‘Zero / ZERO’ and follow
instructions.
1. Send OPEN VALVE
2. Wait until process chamber is evacuated
and sensor signal is not shifting anymore.
3. Send ZERO
• 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.
• 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 and sensor configuration» of the setup procedure.
Otherwise incorrect pressure reading is the result.
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