PASCO DataStudio New Features Guide - Manual (Page 10)

DataStudio New Features Calibration
10 ®
One-point (Adjust Offset Only)
In a one-point offset calibration, you reset only one point. The
line shifts so that it intersects the new point, but its slope does
not change.
Offset calibration is usually used to make one sensor agree
with another sensor. The graph below on the left shows the
measurements from two temperature probes in the same con-
tainer of water. Due to normal variation among probes, the
second probe consistently reads about 0.3 °C higher than the
first probe. Normally this difference would be insignificant;
however, an offset calibration can be used to bring the sensors
into closer alignment. See page 12 for step-by-step instruc-
tions.
Calibrate Sensors Dialog Box
Click the Calibrate Sensors button in the Setup window to open the calibration dialog
box.
The raw (uncalibrated) measurement from an analog ScienceWorkshop sensor is the
voltage produced by the sensor and input to the interface. In the case of PASPORT
sensors, the value and units of the raw measurement data do not necessarily have an
new
point old
calibration
new
calibration
Input Dat
a
Output Data
line shifts
One-point slope calibration; the line shifts to
intersect the new point
Before offset calibration After offset calibration
One measurement
is shifted to align
with other
measurement
Raw measurements made by the
sensor for each standard (usually
these values are automatically
entered)
Click to automatically enter the
raw input measurement for each
standard
Calibration type options
Present raw measurement from
the sensor
When this option is selected, all
measurements of the selected
type will be calibrated together
Sensor selected for calibration
Measurement to be calibrated
Slope and offset of the previous
or default calibration
Present calibrated measurement
according to the calibration in
progress
User-entered known values of
standard solutions or objects
Slope and offset of the calibration
in progress