Sample Handling:
Representative sampling is a key factor in the calibration procedure. It must ensure that any sample
taken from the line relates exactly to the displayed moisture reading logged as “the sensor reading”.
Samples should be taken immediately downstream of the sensor and in the same plane as the
measurement beam. This eliminates variations in the moisture content across or along a conveyor.
Samples should only be taken from the surface of the product rather than by “digging” down to the
bottom of the conveyor. This eliminates variations down through the bed of product.
Samples should only be taken when the sensor reading is stable, avoiding time when the product
moisture may be rising or falling.
A sample of approximately 2 handfuls should be taken and immediately sealed in an airtight container
or bag. Prior to laboratory analysis the sample should be allowed to stand for about 30 minutes to ensure
homogeneous distribution of the moisture.
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