DR/2000 and DR/2010 Spectrophotometer
Wavelength Calibration Adjustment
Purpose
These instructions provide a step-by-step procedure for performing a wavelength calibration
adjustment for the DR/2000 Spectrophotometer (software versions 2.0, 2.2, 3.0 and greater) and
DR/2010 Spectrophotometer. Do not
software! Perform the adjustment any time the lamp assembly (Cat. No. 46644-00) is replaced
and periodically for optimum performance. The adjustment assures the best possible accuracy
and repeatability. Use the Calibration Filter Assembly (Cat. No. 46646-00) to make the
adjustment.
Start by following the three steps below. Then choose the step-by-step instructions that apply to
the specific instrument and software you are using to finish the calibration adjustment.
1. If lamp replacement is necessary, see the Lamp Replacement instructions shipped with
the lamp.
46644-88
perform this procedure if your instrument has 1.261 or 1.27
2. Determine which software version applies to the spectrophotometer being adjusted. For the
DR/2010 Spectrophotometer, the software version will briefly appear after the instrument is
turned on. For the DR/2000 Spectrophotometer, different messages will appear, depending
on the software in the instrument (see Table 1):
Table 1 DR/2000 Messages Indicating Software Versions
DR/2000 Software Version Display
2.0 or 2.2 If the first display is
then enter 888 with the numeric keys. Press READ/ENTER.The
display will show V2.0 or V2.2.
3.0 and greater
1.261 and 1.27 DO NOT perform the calibration adjustment. Monochromator
Self-Test V3.X
calibration could be permanently lost (Hach Service cannot restore
the calibration).
Method #?,pressSHIFT CONFIG/METH,
Select the appropriate wavelength calibration adjustment procedure on the following pages
and continue.
Wavelength Calibration Adjustment, continued
DR/2010 Spectrophotometer Procedure
850 nm
1. Empty the cell
compartment and close the
cover. Adjust the wavelength
to about 850 nm.
2. Press SHIFT SETUP/2 to
enter the Setup Menu. Press
DOWN ARROW twice to
the
access
Momentary mode, press
ENTER then UP ARROW, then
ENTER again. If in Constant-
On mode, go to step 3.
Lamp:.Ifin
3. Scroll to the Adjust nm
option with the
key and press ENTER.The
display will show:
Peak Filter:
UP ARROW
4. Press: ENTER.The
display will show:
Zero Required
5. Press: ENTER
The display will show:
100 %T Peak Filter
6. Insert the calibration
filter into the cell
compartment with the tab
facing right. Close the cover.
7. Slowly adjust the
wavelength by turning the
control counterclockwise.
Record the wavelength
where the % transmittance
reading is greatest.
2
8. Turn the wavelength
control clockwise so the
wavelength is at least 10 nm
higher than the wavelength
value recorded in step 7.
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