Instrumentation & Measurement Magazine 25-7 - 23

Fig. 3. x chart stability comparison of BLUE RADIODMETER at different experiment days. (a) Diaphragm calibration method. (b) ND-filters calibration method.
Fig. 4. R chart stability comparison of BLUE RADIODMETER at different experiment days. (a) Diaphragm calibration method. (b) ND-filters calibration method.
Experimental Results and Discussion
The irradiance measurements
of the two applied
calibration methods for
one of the two test detectors
are shown in Fig. 3 and
Fig. 4. In Fig. 3b, x chart
of BLUE RADIODMETER,
shows that there is no
indication of an out-of-control
condition in the case
of the ND-filters calibration
method, while there is
more than an out-of-control
condition in the other
case, the diaphragm calibration
method (Fig. 3a).
Fig. 3 clarifies that all the
fluctuations are around the
mean
X   and t 1he changes
i xi
N

due to random error are
controlled and satisfied in
the ND filter calibration
method, i.e., the control
limits on the x chart are
N
October 2022
Fig. 5. BLUE RADIODMETER comparison of repeatability STDEV at all experiment days in the stability of calibration
method for diaphragm and ND-filter.
IEEE Instrumentation & Measurement Magazine
23

Instrumentation & Measurement Magazine 25-7

Table of Contents for the Digital Edition of Instrumentation & Measurement Magazine 25-7

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