705-5100-121 Datasheet, PDF (27/56 Pages) Magnetrol International, Inc. – GuidedWave Radar Level Transmitter

4.4 User-Calibration Parameters
One of the main advantages of the Enhanced Eclipse Model
705 GWR transmitter is that the device does not need to be
calibrated in the field. Every Enhanced Eclipse Model 705
transmitter is shipped precisely calibrated from the factory.
On the other hand, part of the advantage of
FOUNDATION fieldbus^™ is to provide the ability to monitor
changes and make adjustments to a transmitter. The
Fieldbus^™ concept allows a user to make calibration adjust-
ments if deemed necessary.
NOTE: The original factory calibration settings are restored when a new
probe length value is assigned.
It is highly recommended that factory calibration be used
for optimum performance.
Contact the factory for information on how to perform a
User Calibration.
4.4.1 Factory Parameters
The factory-adjustable calibrated parameters are WINDOW,
CONVERSION_FACTOR, and SCALE_OFFSET.
WINDOW is used to adjust for the variations in the analog
section of the Eclipse TDR measurement engine. CON-
VERSION_FACTOR and SCALE_OFFSET are the main
factory calibration settings.
The following parameters are used for either troubleshoot-
ing or are parameters adjusted at the factory. They should
never be changed in the field.
WINDOW: determines the amount of delay between the
generation of the transmitted signal pulse and the start of
the measurement cycle.
FID_TICKS: a measure of the time to the fiducial (refer-
ence) pulse.
FID_TICKS_SPREAD: provides an indication of the
stability of the FID_TICKS measurement.
LEVEL_TICKS: a measure of the time to the level of the
product being measured.
LEVEL_TICKS_SPREAD: provides an indication of the
stability of the LEVEL_TICKS measurement.
CONVERSION_FACTOR: the slope of the factory-set
calibration line.
SCALE_OFFSET: the intercept of the calibration line.
57-640 Eclipse Guided Wave Radar Transmitter - FOUNDATION fieldbus^™
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