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s
Because the moisture analyzer may have an error due to its application and operating conditions, the
customer needs to routinely and periodically check if the moisture analyzer maintains the required
performance and functions normally.
The customer should determine the actual inspection (including the inspection method and criteria) as
the control criteria depend on the purpose of application and management of the moisture analyzer.
If the requirement level of inspection is low, some problems may not be found. However, if this level
is too high, the application efficiency may drop. You should determine the well-balanced inspection
level by considering the risk of overlooking detection of a problem and the required measurement
performance.
The following provides a guideline for carrying out routine and periodic inspections.
Use this guideline as a reference when carrying out actual inspections.
Routine Inspection
The operator (or manager) needs to routinely check the moisture analyzer.
You can determine the minimum number of points to check.
The following gives examples.
Routine inspection
(Example 1)
Routine inspection (Example 2)
Frequency
Once a day
Once or several times (any) a day
Inspection time
Before starting the measurement
Before starting measurement and before
important measurement
Method
Check for an instrumental error
at a single point.
Check for an instrumental error at a single
point.
Determine a single observation
point which is a little higher
than the upper limit of actual
measurement range.
As the inspection point before measurement,
determine a single observation point which
is a little higher than the upper limit of the
entire possible range in actual measurement.
As the inspection point before conducting
an important measurement, determine an
observation point that is slightly larger
than the mass of the sample (object) to be
actually measured.
Criteria
The value actually measured
by the moisture analyzer, and
it shall be within ±5 of an
additional decimal place added
to the required level of accuracy.
The value actually measured by the
moisture analyzer, and it shall be within ± 5
of an additional decimal place added to the
required level of accuracy.
n
Inspection
