Hach DR/2010 User manual

46644-88
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 perform this procedure if your instrument has 1.261 or 1.27
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.
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):
Select the appropriate wavelength calibration adjustment procedure on the following pages
and continue.
Table 1 DR/2000 Messages Indicating Software Versions
DR/2000 Software Version Display
2.0 or 2.2 If the first display is Method #?,pressSHIFT CONFIG/METH,
then enter 888 with the numeric keys. Press READ/ENTER.The
display will show V2.0 or V2.2.
3.0 and greater Self-Test V3.X
1.261 and 1.27 DO NOT perform the calibration adjustment. Monochromator
calibration could be permanently lost (Hach Service cannot restore
the calibration).

2
Wavelength Calibration Adjustment, continued
DR/2010 Spectrophotometer Procedure
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
the DOWN ARROW twice to
access Lamp:.Ifin
Momentary mode, press
ENTER then UP ARROW, then
ENTER again. If in Constant-
On mode, go to step 3.
3. Scroll to the Adjust nm
option with the UP ARROW
key and press ENTER.The
display will show:
Peak Filter:
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.
8. Turn the wavelength
control clockwise so the
wavelength is at least 10 nm
higher than the wavelength
value recorded in step 7.
850 nm

Wavelength Calibration Adjustment, continued
3
9. Slowly turn the
wavelength control
counterclockwise. Watch the
%T values displayed. Stop
exactlyonthe
highest transmittance.
10. Press: ENTER
The display will show:
Are You Sure?
11. Press: ENTER
The calibration adjustment
will occur automatically. If
successful, the display will
show Completed and then
Adjust nm. If you cannot
obtain a good adjustment,
contact the Hach Service
center serving you.
12. To use the factory
default setting, press SHIFT
SETUP
, then press UP
ARROW twice.
The display shows Adjust
nm:.PressENTER.PressUP
ARROW once to display
Default Setup:,thenENTER.
The display shows
Completed.PressEXIT twice
to get the Enter Program #
prompt.
DR/2000 Spectrophotometer Procedure, Version 3.0 and Greater
1. Press:
SHIFT CONFIG/METH
If CONSTANT ON is
displayed, go to step 2.If
MOMENTARY is displayed,
press READ/ENTER to toggle
to CONSTANT ON.
1. Do not do this calibration if
your instrument has version
1.261 or 1.27 software!
2. Press CONFIG/METH
twicetoreturntothe
METHOD #? prompt.
3. Press SHIFT % T to select
the %T mode. The display
will read:
%T
4. With the cell
compartment empty and the
cover closed, rotate the
wavelength dial until the
small display shows:
850 nm
To use factory
default setting, see
instructions below
this box.
850 nm

4
Wavelength Calibration Adjustment, continued
5. Press: CLEAR/ZERO
The display will show:
100.0 %T
Note: If the display does not
read within ±0.3 %T, press
CLEAR/ZERO again.
6. Place the Calibration
Filter into the cell holder.
Close the cover.
Note: Alignthetabwiththe
notch in the cell holder opening.
7. Slowly turn the
wavelength dial counter-
clockwise (decreasing
wavelength). Record the
wavelength where the %T
is highest.
8. Turn the wavelength
control clockwise so the
wavelength is at least 10 nm
higher than the wavelength
value recorded in step 7.
9. Slowly turn the
wavelength control
counterclockwise. Watch the
%T values displayed. Stop
exactly on the highest
transmittance.
10. Press SHIFT
CONFIG/METH and scroll
with the Arrow keys until
the display shows:
ADJUST nm
11. Press: READ/ENTER
The display will show:
ARE YOU SURE?
Press READ/ENTER again.
If the wavelength calibration
adjustment was successful,
the display will show:
COMPLETED
with 808 in the nm field and
then: ADJUST nm
If you cannot obtain a good
adjustment, contact the Hach
Service center serving you.
12. Press CONFIG/METH
three times to return the
display to:
METHOD #?

Wavelength Calibration Adjustment, continued
5
DR/2000 Spectrophotometer Procedure, Versions 2.0 and 2.2
1. Press:
SHIFT CONFIG/METH
Scroll with the Arrow keys
until the display shows:
CONSTANT ON
Note: Do not do this calibration
if your instrument has 1.261 or
1.27 version software!
2. Press READ/ENTER three
times to accept the mode
choice and return to the
METHOD #? prompt.
3. Press SHIFT %T to select
the %T mode. The display
will show:
%T
4. With the cell
compartment empty and the
cover closed, rotate the
wavelength dial until the
small display shows:
850 nm
5. Press:
CLEAR/ZERO
The display will show:
100.0% T
Note: If the display does not
read within ±0.3 %T, press
CLEAR/ZERO again.
6. Place the Calibration
Filter into the cell holder.
Close the cover.
Note: Align the key with the
notch in the cell holder opening.
7. Slowly turn the
wavelength dial counter-
clockwise (decreasing
wavelength). Record the
wavelength where the %T
is highest.
8. Turn the wavelength
control clockwise so the
wavelength is at least 10 nm
higher than the wavelength
value recorded in step 7.
850 nm

Wavelength Calibration Adjustment, continued
9. Slowly turn the
wavelength control
counterclockwise. Watch the
%T values displayed. Stop
exactlyonthe
highest transmittance.
10. Press:
SHIFT CONFIG/METH
Enter 888 with the
numeric keys.
11. Press READ/ENTER and
immediately key in 123and
READ/ENTER.
If the calibration was
successful, the display will
show 808 in the nm field
with the METHOD #?
prompt.
If you cannot obtain a good
adjustment, contact the Hach
Service center serving you.
© Hach Company, 1999. All rights reserved. Printed in the U.S.A. hm/dk 6/99 1ed