Hach 2100Qis User Manual page 20

1. Fill the clean sample 2. Wipe with lint-free
cell to the line with high cloth. Apply a thin film
quality water (< of silicone oil
0.5 NTU) and cap silicone oil to a sample
immediately. Let the cell on page 17).
sample cell degas for at
least five minutes.
7. Remove the cell, 8. Push Read. Record
rotate it slightly the cell position in the
cell compartment and
approximately ⅛ of a
the reading result.
turn and insert it again
into the cell
compartment. Close the
lid.
18 English
3. Push the POWER
key to turn the meter
(Apply on. Place the
instrument on a flat,
sturdy surface.
Note: Do not hold the
instrument while
making measurements.
9. Repeat step 6 until
the lowest reading is
shown. Place an
orientation mark on the
cell marking band near
the top of the cell so the
cell can be consistently
inserted in the position
that yields the lowest
reading.
4. Insert the sample 5. Push the UP and
cell in the instrument DOWN key to access
cell compartment so the the Reading Options
diamond or orientation and then select
mark always aligns with Indexing Sample Cell.
the raised orientation Note: The instruments
mark in front of the cell always stays in the last
compartment. Close the selected reading mode.
lid.
6. Push Read. The
display shows
Stabilizing then the
turbidity in NTU. Record
the cell position in the
cell compartment and
the reading result.