C6 Statistics; C7 Continual Gloss Measurement (Refo 3D Only) - Hach REFO 3 Operating Instructions Manual

Operating Instructions REFO 3 / REFO 3-D
Now the measured value is shown on the display. All of the three measurements are
stored together under a number. A maximum of 200 three-angle measurements can be
stored.

C6 Statistics

In all of the three programs P1, P2 and P3 you can acquire and evaluate entire set-off
measurements with the following statistical values calculated:

Mean value

Standard deviation

Coefficient of variability
For statistical evaluation of a set-off measurement, proceed as follows:

Turn on REFO with key Meas/ON

Use the program key to select program P1, P2 or P3

Select the viewing angle for programs P1 and P2 with the angle selector key (for program
P3 the first viewing angle to be displayed)

Press the statistics key

Place REFO on the sample to measure

Press key Meas/ON to trigger a set-off measurement. The number of measurements is
indicated on the display next to the sum symbol ***.
With the program key you can clear the latest measurement. The display will then indi-
cate C... (Clear) and reduce the current number by one.
Press the statistics key to finish the set-off measurement
Display of the mean value (M)

Press the statistics key to call the standard deviation (S)

Press the statistics key to call the coefficient of variability (VK) (program P2 does not de-
termine VK!)

Press the statistics key once more to quit the statistics function.
In the difference measurement (P2) the statistics function can be used to determine the
mean value of a set-off measurement and use it for a reference.

C7 Continual Gloss Measurement (REFO 3D only)

With the continual gloss measurement program, measurements are made automatically
in 3 second intervals.
In this measurement mode it is not possible to transfer data through the interface or the
internal memory. This program function is enables the measurement of gloss differences
over a large surface with the reflectometer.

Switch on REFO with the Meas/ON key

Select program P4 with the program key

Select measurement angle with the angle select key (the selected angle is shown in the
display)
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