Hach DR2400 - Page 213

Chlorine, Total
Chlorine, Total
ChlorineTot_PT2_ULow_DPD_Eng_Ody.fm Page 5 of 10
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.
6. Touch the timer icon,
then the
General Timer
option.
Set a five-minute timer.
Touch
OK. A five-minute
dechlorination 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.
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.
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.
10. Touch the timer icon.
Touch the three-minute
timer.
Touch
OK. A three-minute
reaction period will begin.
11. During the reaction
period, flush the
Pour-Thru Cell with the
remainder of original
dechlorinated water from
step 9.
12. When the flow stops,
touch
Zero.
The display will show:
0 µg/L Cl
2
General Timer
Zero