Hach-Lange REFO 3_REFO 3D - Manual (Page 12)

Operating Instructions REFO 3 / REFO 3-D
11
C Applications
C1 Calibration
It is recommended to calibrate at least once a day or after extended breaks. Before
starting to calibrate make sure that the standard is clean and the cloth removed.
The calibration is performed as follows:
•
Put REFO on the standard
•
Turn on REFO with key Meas/ON
•
Press key Meas/ON
•
During the calibration, the display reads *Cal* or M-Cal (for metal standard)
•
Wait for ok display
Calibration is only possible with one of programs P1-P3 set. The system recognizes
D- or M-mode automatically and shows it on the display before the standard number.
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 con-
secutive numbering.