LaMotte 1200 Colorimeter - Manual (Page 42)

BROMINE TEST PROCEDURE - DPD METHOD
Read the 1200 Colorimeter Manual before proceeding. Carefully
wipe tubes dry before inserting into the colorimeter chamber.
FREE AVAILABLE BROMINE
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
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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.
Align the index line
with the arrow on
the meter, insert
tube into chamber.
Close the lid. Push
the
button. Record
results as ppm
Bromine.
READ
CAL
I200
COLORIMETER
••••••••••••••••••
READ
7.
5.
3.
1. 2.
4.
6.
I200
COLORIMETER
••••••••••••••••••
READ
ZERO
Empty all but a few
drops of sample from
tube. Add one
*Chlorine DPD #1
Tablet (6903A) and
crush with tablet
crusher (0175).
To insure
accurate results, tablet
must be crushed before
filling tube.
NOTE:
Fill to 10 mL line
with sample. Cap
and mix until tablet
disintegrates. Make
readings within 30
seconds after
disintegration of the
tablet.
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