72
5.17.3.
Performing a Two-point Calibration
To perform a two-point calibration, you must have two reference points to input against the real
logger sensor values.
Figure 37:
Two-point calibration window
1. In the
Point #1
field, enter the first
Reference Value
and the corresponding
Logger Value
.
2. In the
Point #2
field, enter the second
Reference Value
and the corresponding
Logger
Value
.
Note:
If you are using a calibrator and the logger is currently displaying the real value to be
calibrated, press the
Copy
button to copy the real value to the
Logger Value
text box.
3. Press
Send Calibration
to send these values to the logger memory.
4. Compare the real value in the Logger Data pane to the reference value. If the values are
within an acceptable margin of error you may close the Calibration window, or move on to
the next sensor or input.
5. If the values are still not accurate enough, you can perform Offset calibration to tweak with
values further.
Note:
Omega strongly recommends calibrating using the default Reference values that appear
in the two Reference value text boxes for each sensor.
5.17.4.
Performing an Offset Calibration
If, after the Two-point calibration procedure, the logger still exhibits some offset value use the
Offset calibration tool to correct it.
The offset value is the difference between the value displayed by the logger and the reference
value. For example if the calibrator is set to 0 °C and the logger reads 1 °C the offset value is
1, but if the logger reads
1 °C then the offset value is
1.
To perform an Offset calibration, simply select the
Offset calibration
radio button to enable the
Offset
text box. For Thermocouples you will only have the option to perform an Offset
calibration.
Enter the offset value in the text box and click
Send Calibration
. Continue to adjust the offset
accordingly until satisfied with the readings.
5.17.5.
Setting the Offset to a Specific Input
After setting the offset to all inputs simultaneously, you can set the offset of each input
separately for even better accuracy.
