LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 76)

6. Open the meter lid. Insert the
tube into the chamber. Align
the index line on the tube with
the index arrow on the meter.
Close the lid. Press
ENTER
to
scan the blank. The screen
will display Blank Done for
about 1 second and then
return to the Color menu.
Color
Scan Blank
Scan Sample
12:00:00 001/500
7. Remove the tube from the
meter. Empty the tube. Rinse
the tube with the sample. Fill
the tube to the 10 mL line with
the sample. Cap the tube.
8. Open the meter lid. Insert the
tube into the chamber. Align
the index line on the tube with
the index arrow on the meter.
Close the lid. Press
ENTER
to select Scan Sample. The
screen will display Reading...
for about 1 second. The result
will appear on the screen
and then return to the Color
menu. Record the result as
color.
Color
110
cu
Scan Blank
Scan Sample
12:00:00 001/500
NOTE: The meter will remember the last scanned blank reading. It is not
necessary to scan a blank each time the test is performed. To use the
previous blank reading, instead of scanning a new one, scroll to Scan
Sample and proceed. For the most accurate results, the meter should
be blanked before each test and the same tube should be used for the
blank and the reacted sample.
DILUTION PROCEDURE
Samples and standards may be diluted with distilled or deionized water.
TESTING TIPS
1. Always use a clean test tube.
2. Turbidity will interfere with the color test. Sample may be fi ltered
before testing but results will be as true color. (See What is Color?,
page 17)
3. When testing at low concentrations use the same tube for the blank
and the sample.
76
Color Analysis