OPERATOR’S MANUAL
C-2000 Cotton Moisture Meter
11001-1356-200511
FACTORS AFFECTING READINGS 9
FACTORS AFFECTING READINGS
Moisture content of the samples is the primary factor affecting meter
readings. However, readings are also affected by the following:
• Type of cotton.
• Area where it is grown.
• Impurities.
• Compaction (density) around the electrode surfaces.
• Temperature of the sample.
In order to minimize the effect of these factors and improve the repeatability
of the meter readings, it is recommended to keep in mind the following
points:
• Use samples with minimum of impurities.
• Optimal accuracy may be obtained it meter readings are checked
against %MC (percent moisture content value) by means of a properly
run oven test on the particular product being tested.
TEMPERATURE CORRECTION
The basic calibration assumes the cotton temperature to be 70
O
F. For best
accuracy, apply a temperature correction if the cotton temperature is outside the
range of 60
O
F to 80
O
F. Make a correction of approximately 1.0% for every 20
O
F.
The meter will read higher than the actual moisture content as cotton temperature
increases, and will read lower as cotton temperature decreases.
Example:
At 70
O
F, a reading of 7% indicates actual %MC (percent moisture content value) of
7%. At varied temperatures, meter readings will vary as follows:
Cotton temperature = 110
O
F Meter reading = 9.0% Actual %MC = 7%
Cotton temperature = 50
O
F Meter reading = 6.0% Actual %MC = 7%
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