LaMotte 1200 Colorimeter - Manual (Page 38)

CHLORINE DIOXIDE TEST PROCEDURE - DPD METHOD
Read the 1200 Colorimeter Manual before proceeding.
Carefully wipe tubes dry before inserting into the colorimeter
chamber.
CHLORINE DIOXIDE
2
Remove tube.
Add 5 drops
Glycine
Solution
(6811). Cap
and mix.
Cap and invert to
mix. Wipe tube dry.
Make readings
within 30 seconds.
Fill the Water
Sample Collecting
Bottle (0688) with
sample water. This
will be used to
dispense sample
water for the tests.
Insert the tube
into the
chamber, being
sure to align the
index line with
the arrow on
the meter.
Close the lid.
This tube is the
blank or zero.
Rinse and fill a
colorimeter tube
(0290) to the
10 mL line with
sample water.
Cap and wipe
dry.
5.
7.
3.
1. 2.
4.
6.
I200
COLORIMETER
••••••••••••••••••
READ
bla
ZERO
Add 5 drops DPD
#1A Free Chlorine
Reagent (6740),
and 5 drops of
*DPD #1B Free
Chlorine Reagent
(6741).
Push the
button to turn the
meter on. Press the
button
and hold it for 2
seconds until
is
displayed. Release
the button to take a
zero reading
(0.00 ppm).
READ
ZERO
bla
8.
CAL
I200
COLORIMETER
••••••••••••••••••
READ
Align the index
line with the arrow
on the meter, insert
tube into chamber.
Close the lid. Push
the
button. Record
results as ppm
Chlorine Dioxide.
READ