Hach-Lange 2100 AN IS Laboratory Turbidimeter User Manual - Manual (Page 36)

7. Push ENTER.
The display shows
"MM-SS MEA" (or an
actual measurement
time if a measurement
time has been selected
previously). 8. Push the arrow keys
to select the
measurement time. 9. Push ENTER to
open the flow valve and
start the fill time
interval.
To do the measurement
again without the fill
time interval, push
ENTER.
To do the measurement
again with the fill time
interval, push FLOW
two times, then push
ENTER. 10. When
measurements are
complete, push FLOW.
The FLOW light turns
off. 11. Push and hold the
valve-control switch to
the Momentary Open
position to drain the
flow cell.
Use a cell adapter
Many different test tubes, sample cells and ampules can be used to
measure samples when a cell adapter is used. Use a cell adapter when
the test tube, sample cell or ampule is less than 25 mm. Refer to
Accessories on page 46 for the available cell adapters.
Use only test tubes and sample cells that are free of significant
scratches. Clean and apply silicone oil to all sample cells, test tubes and
ampules used with the cell adapters. Refer to
Clean the sample cell
on page 18.
Note: Performance specifications may be different than shown in Specifications
on page 5 when test tubes, sample cells or ampules less than 25 mm are used.
Use a cell adapter when:
• Only a small quantity of sample is available.
• The sample to be measured is in an ampule that cannot be opened.
Refer to Table 4 for minimum sample sizes.
Table 4 Minimum sample sizes
Test tube size Sample
12 mm 2.5 mL
13 mm 3.5 mL
16 mm 5 mL
19 mm 7 mL
34 English