American Magnetics 286 Multi-Sensor Liquid Level Instrument (CE-Marked) - Manual (Page 43)

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Calibration
Calibration Menu Reference
3.3 Calibration Menu Reference
The CAL menu provides screens for calibrating the four sensor inputs. It is
important to understand that a calibration is fixed to a sensor input,
regardless of how the sensor inputs are assigned to the four channels.
Each sensor input can have up to four independent calibrations. Each of
the four calibrations may have independent values assigned for the active
length, MIN/MAX calibration points, approximate calibration factor, and
zero offset.
Note
Do not confuse the four independent calibrations for each sensor
input with the four assignable channels of the instrument.
It is the responsibility of the
end user to maintain accurate
records of the sensor inputs
and calibrations. For
maximum accuracy, the
various connecting
components such as the
cables, oscillator, and sensor
should be considered a
matched set. The oscillator,
oscillator cable length, and
sensor represent the most
significant sources of
variability and must be
matched for a specific
calibration.
A tree diagram of the CAL
menu is provided at left.
Before a calibration can be
selected, at least one calibration for the sensor input must be performed.
Once a calibration is performed (i.e. it contains an active length setting
and valid MIN and MAX calibration points), the “Select Active” menu tree
becomes available for specifying approximate calibration and zero offset
factors. The select menu tree is also used to select an active calibration if
more than one calibration is available for a specific sensor input.
CAL MENU
ENTER PASSCODE
SENSOR INPUT
SELECTION?
SELECT or
PERFORM?
SELECT ACTIVE
APPROX
FACTOR SELECT
APPROX
FACTOR ENTRY
ZERO OFFSET
ENTRY
PERFORM CAL?
MIN/MAX ENTRY
ACTIVE LENGTH
ENTRY
SENSOR INPUT: A, B, C, or D
CAL: 1, 2, 3, or 4 CAL: 1, 2, 3, or 4
CUSTOM