Installation
19
2.10.3 Manual Calibration modes #7, and 8 (Continued)
Note 1: Most water based materials can be considered
conductive, such as acids, bases, salt solutions, water
based slurries, and very wet granular materials.
Carbon black and powdered metals conduct even
without water.
Note 2: With conducting materials, if heavy build up is
anticipated, calibration adjustment can be turned to
its clockwise limit.
Note 3: Some Wet Granular materials can be extremely
conductive and may require special calibration or
different electronic units. If the standard calibration
in the table does not provide satisfactory results,
please contact the eld service department at 215-
674-1234.
Nonvolatile Memory
ThePoint has Nonvolatile memory which allows the unit to re-
start after power outages without recalibrating.
When ThePoint is powered for the rst time the internal
microprocessor records and stores the “Air” value. This is
the uncovered capacitance value of the sensor mounted in the
vessel. ThePoint will also store the last covered value and the
last uncovered value.
Whenever ThePoint is powered it uses these values as a
reference point to determine its current condition (normal or
alarm).
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