19
SECTION 2, continued
2.4 Sample Cell Insertion
Wipe the sample cell with a lint-free cloth or tissue and insert the
cell into the sample cell compartment with the diamond-shaped
marker toward the keypad.
Figure 5 Placing Samples in the Sample Cell Compartment
2.5 Sample Cell Adapter Installation
When installing an adapter into the sample cell compartment,
insert the adapter into the cell compartment and rotate until it
drops into the alignment slots. Finish installation by gently
pushing down on the adapter until it snaps into position.
Place the appropriate vial or sample cell into the adapter - the vial
or sample cell should fit well into the adapter. If it does not,
double-check that the correct sample container (vial or sample
cell) is being used and that the adapter is installed correctly.
2.5.1 Using the 16-mm COD/Test ‘N Tube Vial Adapter
The methods for chemical oxygen demand (COD) and Test ‘N
Tube (TNT) determinations in the colorimeter procedures manual
use 16-mm vials as the sample cell for the colorimetric
measurement. This adapter also holds a standard 16-mm test tube.
Place the COD/TNT Adapter in the instrument's sample cell
compartment as instructed in Section 2.5, above. Place the vial
into the COD/TNT Adapter (see Figure 6).
Always place the instrument cap over the adapter when
measuring in bright sunlight (see Figure 7).
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