Section 8 Cell Adapters; Using Cell Adapters; Installing And Removing Cell Adapters - Hach 2100AN Instrument Manual

SECTION 8

8.1 Using Cell Adapters

8.1.1 Installing and Removing Cell Adapters

Note: Do not force the adapter out
of the compartment; serious
instrument damage can occur.
Figure 21 Cell Adapter Installation
CELL ADAPTERS
Cell adapters are used with the Model 2100AN Turbidimeter when sample cells
smaller than the standard 25-mm cells are required. A wide variety of test tubes,
sample cells and ampules can be used with the cell adapters to measure smaller
sample volumes. Small-diameter sample cells are useful when only a small
quantity of sample is available, the sample to be measured is ampuled and cannot
be opened, or the sample is too turbid for use with the standard sample cell. A
shorter light path permits measurement of high-range samples without the need
for sample dilution.
Adapters are available for vial diameters of 12- to 13-mm, 16-mm and 19-mm
O.D. The 12- to 13-mm adapter accommodates either 12-mm or 13-mm tubes.
The minimum sample volumes that must be used are 2.5 mL for 12-mm tubes,
3.5 mL for 13-mm tubes, 5 mL for 16-mm tubes and 7 mL for 19-mm tubes.
The adapters come with a tall light shield supplied for test tubes taller than the
standard cover.
Carefully select sample-cell glassware used with the adapters to be clean and free
of significant scratches. The same handling and cleaning care applied to the
standard 2100AN sample cells applies to the smaller cells (including the use of
silicone oil on the outside of the glass).
Use the Application-Specific Calibration (ASC) ability of the instrument to
provide direct reading of results (instead of developing a new calibration curve
each time the ASC unit is measured, and calculating the concentration from the
curve) (see SECTION 10 on page 85).
To install a Cell Adapter in the instrument's sample compartment, align the tab on
the cell adapter toward the front of the instrument (see Figure 21).
Carefully pull the adapter straight up to remove. Slowly rotate the adapter
90-degrees counter clockwise if the adapter catches.
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