Multi-Sample Calibration - Process Sensors MCT Series Installation And Operation Manual

8. 2 Multi-Sample Calibration- Static Samples
A more accurate calibration may be obtained by using a larger quantity of samples. As for the
approximate calibration, select the Product code that will be used to store the correct calibration settings.
Make or collect from the process a series of sample (up to 25) with moisture contents covering the range
expected in the process.
Set the Span value to 25.0 and the Damp time to 1sec.
Present the lowest sample to the sensor; adjust the zero setting to make the sensor's reading agree with
the true moisture content of the sample. Note the reading.
Continue to present each of the other samples in turn, noting the sensor reading for each sample.
Tabulate the results as follows:
Using the operator display module (refer to Section7.5):
• Select the Calibration Menu.
• Select the Product Code used to collect the above data.
• Enter the number of data pairs = 5
• Enter the data pairs as requested by the display.
• After all 5 pairs have been entered, review the calibration statistics.
Transfer the new calibration settings to the previously selected Code or to any
other Code number.
The sensor is now accurately calibrated and is ready to be installed on the process line. Due to changes
in the environment, and the way that the moisture is "held" in the process samples it will be necessary to
adjust the zero setting to match the sensor display to the true moisture value of a grabbed sample.
Sensor True Value
3.7 3.7
4.5 5.2
7.6 8.3
9.5 10.3
8.2 8.9
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