Hach-Lange REFO 3_REFO 3D - Manual (Page 9)

Operating Instructions REFO 3 / REFO 3-D
8
4. Press key Meas/ON to calibrate REFO. It identifies M- or D-mode automatically
(not true for REFO 3)
Angle Select
D 0379
+1
→
St - N r
Statistics Key
Program Key
Figure 4: Entering the standard number
5. Enter the 4-digit standard number (current digit blinks). Press the statistics key
until the correct digit appears.
6. Press the program key to skip to the second digit
7. Press the statistics key until the correct digit appears.
8. Repeat the procedure for the 3rd and 4th digits.
When the fourth digit is entered, use the angle selector key to enter calibration va-
lues. Every calibration value consists of four digits (in D-mode with one place after
decimal point, in M-mode without decimal point).
e.g. 85° = 99.5
1st digit = 0
2nd digit = 9
3rd digit = 9
4th digit = 5
Angle Select
099.5
+1 →
85°
Statistics Key
Program Key
Figure 5: Entering the calibration values
1. To enter the calibration values for 20° press the statistics key until the correct
digit appears