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3.3.3 Calibration of Vertical Insulated Sensing Elements or Vertical
Sensing Elements in Insulating Materials
3.3.4 Recalibration
Red LED OFF = normal condition
1. Turn the Differential adjustment to the full counter clockwise
position.
2. Set level to where control is desired. [Minimum of 3 inches
should cover sensing element.]
3. Starting from full counter clockwise position, turn SetPoint
adjustor clockwise, counting the turns until switch changes
state [LED changes state].
4. Record that number of turns as "PRELOAD" for use later
in recalibration. See Section 3.3.4.
Calibration is Complete
If amount of preloading was recorded at time of initial
calibration, it is possible to replace instrument without
experimentally determining proper amount of preload.
1. Turn the Differential adjustor to the full counter clockwise
position.
2. For recalibration using procedure in Section 3.3.2, follow
Steps 1, 2, 3, and 4, then turn SetPoint adjustor further
clockwise amount of preload.
3. For recalibration using procedure in Section 3.3.3, turn
SetPoint adjustor clockwise. from full counter-clockwise
position, by amount of preload.
4. When recalibrating for bare sensing elements in
conductive materials (factory set), turn tuning
SetPoint adjustor to full clockwise position. No other
adjustment is necessary. (Minimum of 25 turns.)
.
19
Calibration
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