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Safety IntelliPoint RF, SXRNTXX Series User's Manual
12
2.5.7 Re-Calibration
Do not push the "ReCal"
Button without first
ensuring the material being measured is below
the sensing element.
If system is powered on the bench prior to installation, or moved
from one tank to another, Re-Calibration is necessary to allow
software to capture the air capacitance generated by sensing
element in the tank.
Merely press and hold the "ReCal" Button for 5 seconds (
Shown
in Figure 2-4
). Green LED flashes for 60 seconds before reset
occurs.
[
Remove power from the system while the green LED is flashing
and reset will occur immediately
].
The system is now ready for installation.
Nonvolatile Memory
The IntelliPoint has nonvolatile memory which allows the unit
to re-start after power outages without recalibrating.
When The IntelliPoint is powered for the first time the internal
microprocessor records and stores the “Air” value.
This is the uncovered value of the sensor mounted in the vessel.
The IntelliPoint will also store the last covered value and the
last uncovered value.
Whenever The IntelliPoint is powered it uses these values as
a reference point to determine its current condition (normal or
alarm).
The IntelliPoint has nonvolatile memory which retains the
recorded values even if power is lost for months. When
The IntelliPoint regains power after a power outage, the
microprocessor compares the stored values to the current
measured value. It will then determine its current status
based on this.
Example:
Air value is 10pF
covered value is 20pF
Uncovered value is 11pF
Setpoint = Alarm or recovery value.