Hach DR2400 Manual page 234

Chromium, Total
5.
Touch the timer icon.
Touch .
OK
A five-minute reaction
period will begin.
25 mL
20 mL
10 mL
9.
Remove cap and add
the contents of one
ChromaVer 3 Chromium
Reagent Powder Pillow.
Cap and invert to mix.
Zero
13.
Touch .
Zero
The display will show:
0.00 mg/L Cr
Chromium, Total
Page 2 of 4
6.
When the timer
beeps, remove the
prepared sample. Using
running water, cool the
cell to 25 °C. Be sure the
caps are on tightly.
10.
Touch the timer icon.
Touch .
OK
A five-minute reaction
period will begin.
25 mL
20 mL
10 mL
14.
Place the prepared
sample into the cell
holder.
25 mL
20 mL
10 mL
7.
Remove cap and add
the contents of one
Chromium 2 Reagent
Powder Pillow. Cap and
invert to mix.
25 mL
20 mL
10 mL
11.
When the timer
beeps, fill another sample
cell with 25 mL of sample
(the blank).
Read
15.
Touch .
Read
Results will appear in
mg/L Cr.
25 mL
20 mL
10 mL
8.
Remove cap and add
the contents of one Acid
Reagent Powder Pillow.
Cap and invert to mix.
25 mL
20 mL
10 mL
12.
Place the blank into
the cell holder.
ChromiumTot_PP_Other_AHY_Eng_Ody.fm