TEST INSTRUCTIONS - Geotech Environmental Equipment

PROCEDURE
Use 10 mm square cell adapter.
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 13 Ca&Mg H-UDV)
from TESTING MENU.
5. Scroll to and selec t 13 Ca&Mg Hard-UDV from menu.
6. Rinse a clean vial (0156) with sample water.
7. Use the syringe (1184) to add 3 mL of sample to the vial.
8. Insert the vial into chamber, close lid and select SCAN BLANK.
9. Remove vial from the colorimeter.
10. Use the syringe (1184) to add 3 mL of sample to a Calcium Hardness
UDV vial (4309).
11. Shake vigorously for 10 seconds.
12. Wait one minute.
13. Invert vial 3 times to mix.
NOTE: Firmly tap side of vial 5-10 times to remove all air bubbles.
14. Insert tube into chamber, close lid and select SCAN SAMPLE. Record
result.
15. Press OFF button to turn the colorimeter off or press EXIT button to exit
to a previous menu or make another menu selection.
NOTES: For best possible results, a reagent blank should be determined to
account for any contribution to the test result by the reagent system. To
determine the reagent blank, follow the above test procedure to scan a distilled
or deionized water blank. Then follow the above procedure to perform the test
on a distilled or deionized water sample. This test result is the reagent blank.
Subtract the reagent blank from all subsequent test results of unknown samples.
It is necessary to determine the reagent blank only when a new lot number of
reagents are obtained.
UDVs from opened pouches should be used promptly. Store unused vials from
opened pouches in the Foil Storage Bag (9467) to extend the shelf life of the
reagent. Generally, UDVs stored in the bag should be used within 10 days if
the humidity is less than 50% and within 5 days if humidity is greater than
50%. The Foil Storage Bag contains a desiccant pack with indicator. When
the indicator in the window turns from blue to pink, the bag should be
replaced.
Calcium & Magnesium (Total) Hardness–UDV 2/2 Smart2 TEST PROCEDURES 2.04