Hach DR/2010 Instrument Manual page 72

27. The will be flashing. Using the
0.00
concentration of the first and lowest standard. Press
the displayed number. The display will show (for example):
 &&&&
If units, for example "mg/L", were entered previously, they will appear in
the far right of the display.
28. Insert the first (lowest concentration) standard in the cell holder and
close the cover. Press the
example):
&&&&
then (for example):
&&&& %
If the absorbance value of the standard is known, enter this value
using the numeric key pad. The value will be displayed in the left side
of the display in large numbers.
29. Press to accept the displayed absorbance value.
ENTER
Press to accept the
ENTER
standard. The display will show (for example):
 &&&&
30. The will be flashing. Using the numeric keys, enter the
0.000
concentration of the second standard. Press
displayed number. The display will show the concentration value.
NUMERIC
# &&&
)>I 
key and the display changes to (for
READ
# &&&
4A=@E
# &&&
)>I 
data pair and bring up the next
abs/conc
# &&&
  
72
keys, enter the
to accept
ENTER
nm
nm
nm
nm
to accept the
ENTER