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LaMotte SMART 2 Electronic Soil Lab User Manual

Page 62

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PROCEDURE

1. Press and hold ON button until colorimeter turns on.
2. Press ENTER to start.
3. Press ENTER to select TESTING MENU.
4. Select ALL TESTS (or another sequence containing 32 Cu DDC) from

TESTING MENU

.

5. Scroll to and select 32 Cu DDC from menu.
6. Fill a clean tube (0290) to the 10 mL line with the soil extract then

neutralize according to the procedure on page 50.

7. Insert tube into chamber, close lid and select SCAN BLANK.
8. Remove tube from colorimeter and add 5 drops of *Copper 1 (6446). Cap

and mix. Solution will turn yellow if copper is present.

9. Insert tube into chamber, close lid and select SCAN SAMPLE. Multiply the

result by 5 to determine the copper concentration in ppm.

10. Press OFF 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.

n

COPPER CONCENTRATION CHART

PARTS PER MILLION

RANGE

0-1 ppm

Low

1-3 ppm

Marginal

3-4 ppm

Adequate

62

SMART2 SOIL MANUAL 1.07