LaMotte SMART 3 Electronic Soil Lab - Manual (Page 66)

66 SMART3 Soil 1.11
PROCEDURE
Press and hold 1. until colorimeter turns on.
Press 2. ENTER to select TESTING MENU.
Select 3. ALL TESTS (or another sequence containing 031 Cu
Thiocarbamate) from TESTING MENU.
Scroll to and select
4. 031 Cu Thiocarbamate from menu.
Scroll to and select 32 Cu DDC from menu. 5.
Fill a clean tube (0290) to the 10 mL line with the soil extract then neutralize 6.
according to the procedure on page 56.
Insert tube into chamber, close lid and select SCAN BLANK.
7.
Remove tube from colorimeter and add 5 drops of *Copper 1 (6446). Cap 8.
and mix. Solution will turn yellow if copper is present.
Insert tube into chamber, close lid and select SCAN SAMPLE. Multiply the
9.
result by 5 to determine the copper concentration in ppm.
Press
10. button to turn colorimeter off or press
EXIT
button to exit to a
previous menu or make another menu selection.
NOTE: The reaction may stain the tubes. Scrub the tubes thoroughly after
each use.
COPPER CONCENTRATION CHART
PARTS PER MILLION RANGE
0-1 ppm Low
1-3 ppm Marginal
3-4 ppm Adequate
Test P
rocedures