Hach DR/2010 Instrument Manual page 73

31. Insert the second standard in the cell holder and close the cover. Press
the key and the display changes to:
READ
&&&&
then:
! &&&&
If the absorbance value of the standard is known, enter this value
using the numeric key pad. The value will be displayed on the left
side of the display. Press
again to accept the data pair.
ENTER
32. Repeat the sequence in Steps 30-31 for each standard.
33. After the last standard is entered, press
Program setup menu.
data points in the calibration table). Press the
34. The display will show:
&&&& 
To change this option to On, press
toggle between Off and On. Press
is displayed.
When on, this selection forces the calibration curve through the 0, 0
point on the calibration curve graph. If Force Zero is not used, and the
intercept ("a" coefficient) is significantly different from zero, pressing
will not make the display read 0.00. Zeroing sets the Abs to 0;
ZERO
the displayed concentration depends on the curve itself (i.e., C = -2 +
(500 x Abs); zeroing gives -2 as a display).
&&& #
4A=@E
"# &&&
)>I %#
to accept the absorbance value. Press
ENTER
EXIT
will be flashing (X= number of
Calib Table: X
"# &&&
. H?A AH  BB
ENTER
ENTER
73
nm
nm
to return to the User
key.
DOWN ARROW
nm
. Use the keys to
ARROW
when the correct setting