Kaman KDM-8200 - Manual (Page 29)

29
Kaman Precision Products
The Three
Calibration
Methods
Calibration
Linearity
Coarse and Fine Linearity controls affect the shape of the system output curve. The closer the
output is to a straight line, the more accurate your measurement readings will be. Adjustment of
the Linearity controls interacts with the Gain and Zero controls. The linearity control is primarily
used to swing the full scale endpoint. Due to the effect of the log amp, it will have some effect on
the gain and less effect on the zero.
You have the option of choosing from three methods of calibration:
Full Scale:
Output from 0 Vdc to some maximum value.
Bipolar: Negative output for first half of range; positive output for second
half.
High Accuracy
Increased linearity by using only part of full-scale measuring range.
Band:
Depending on your application, you will use any one of three procedures outlined above to
calibrate your system. Before calibration, we recommend that you become familiar with the
following information to ensure that you have made the necessary considerations regarding your
particular application.
With a thorough knowledge of calibration variables and accurate application of the calibration
procedures described in the following pages, you can achieve optimum results. Deviations or
shortcuts can result in operator-induced errors and may complicate rather than solve your
measurement problems.
VDC
offset
DISPLACEMENT
Full Scale Calibration
VDC
offset
DISPLACEMENT
Bipolar Output Calibration
CALIBRATED
RANGE
VDC
offset
DISPLACEMENT
High Accuracy Band
Calibration