Hach DR2400 Manual page 213

5. ®
Using a TenSette
Pipet, add 1.0 mL of
Blanking Reagent to the
beaker. Swirl several
times to mix.
The Blanking Reagent
removes chlorine and
chloramines from the
water.
9.
Fill the cylinder to the
50-mL mark with
dechlorinated water from
step 5. Cap and invert
twice to mix. Save the
remaining water for
step 11.
ChlorineTot_PT2_ULow_DPD_Eng_Ody.fm
General Timer
6.
Touch the timer icon,
then the
General Timer
option.
Set a five-minute timer.
Touch . A five-minute
OK
dechlorination period will
begin.
10.
Touch the timer icon.
Touch the three-minute
timer.
Touch . A three-minute
OK
reaction period will begin.
7.
After the timer beeps,
break open one ampule
of ULR Chlorine Buffer
Solution. Using a
®
TenSette Pipet and clean
tip, transfer 1.0 mL of
buffer from the ampule to
a clean 50-mL mixing
graduated cylinder.
11.
During the reaction
period, flush the
Pour-Thru Cell with the
remainder of original
dechlorinated water from
step 9.
Chlorine, Total
8.
Break open one
ampule of DPD Indicator
Solution for Ultra Low
Range Chlorine. Using a
®
TenSette Pipet and a
clean tip, transfer 1.0 mL
of indicator from the
ampule to the cylinder.
Swirl to mix the reagents.
Proceed to step 9 within
one minute.
Zero
12.
When the flow stops,
touch .
Zero
The display will show:
0 µg/L Cl
2
Chlorine, Total
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