C2 Reference Standards; C3 Gloss Measurement; C4 Difference Gloss Measurement; C5 Three-Angle Measurement - Hach REFO 3 Operating Instructions Manual

C2 Reference Standards

The chosen reference standard is standard A according to DIN 67530/ISO 2813 or the
optional metal standard according to ISO 7668 for high-gloss measurements.

C3 Gloss Measurement


Turn on REFO with key Meas/ON

Use the program key to select program P1

Use the angle selector key to select the viewing angle (the selected angle is shown on the
display)

Place REFO on the sample to measure

Press key Meas/ON
Now the measured value is shown on the display and stored automatically with consecu-
tive numbering.

C4 Difference Gloss Measurement

Difference measurement means measuring against a reference. The measured differ-
ence between reference and sample is the indicated measured value.

Turn on REFO with key Meas/ON

Use the program key to select program P2
Use the angle selector key to select the viewing angle (the selected angle is indicated on
the display)

Place REFO on the reference

Press key Meas/ON to measure the reference. The reference measurement is confirmed
on the display with letter R next to the angle value

Place REFO on the sample to measure

Press key Meas/ON to measure the difference
Now the measured difference value is shown on the display and stored automatically
with consecutive numbering.

C5 Three-Angle Measurement

In three-angle measurements the sample is measured automatically at viewing angles of
20°, 60° and 85°.

Turn on REFO with key Meas/ON

Use the program key to select program P3

Use the angle selector key to select the first viewing angle

Place REFO on the sample to measure

Press key Meas/ON

Wait for the measuring display

Call the other measurings with the angle selector key
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