6
Verifying and calibrating measuring system
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6.5
Setting aerosol sensor offset
Setting the offset is an automatic process that minimizes the inherent noise
of the device. The device sets an adjustment voltage for the offset. The
process takes about two minutes.
Prerequisites
• Calibration mode is activated.
• The device has been tested for leakage and verified.
• The device’s zero point has been checked.
Performance
1.
Select
Main menu > expert user menu
(password
1-
).
2.
Select
settings/calibration.
3.
Select
sensor calibration.
4.
Touch
adjust offset
to start adjustment.
5.
Observe the parameter
Offset
(top right).
ð
The value changes as the controller varies the offset adjustment voltage.
When the displayed curve passes the minimum, the displayed value has
to be below 0.2 mV.
When adjustment is completed, the offset adjustment voltage is calcu-
lated. The displayed value has to be between 2.0 and 3.0 V.
Screen during automatic setting of offset adjustment voltage
If the displayed values deviate:
4
Inform Palas or your sales partner.
