Hach 2100P User Manual

25
SECTION 2, continued
1. Fill the clean sample
cell to the line with
high quality water
(< 0.5 NTU). Cap and
wipe with lint-free cloth.
Apply silicone oil. See
Section 3.6.2.2 on
page 40 for more
information about
high quality water.
2. Press: I/O to turn the
instrument on.
3. Insert the sample
cell into the sample
compartment. Close
the cover.
4. Press: READ
Record the cell's position
in the cell compartment
and the displayed
reading.
Note: This procedure may
be easier if the user holds
the
READ key through the
whole process. This allows
the lamp to remain on and
make continuous readings.
5. Remove the cell,
rotate it slightly and
reinsert it into the cell
compartment. Close the
cover, then press
READ.
Record the cell's position
and the displayed
reading.
6. Repeat step 5 until
the lowest reading is
displayed. Place an
orientation mark on the
cell's marking band near
the top of the cell so the
cell can be consistently
inserted in the position
that yields the lowest
reading. When using the
cell, always place it in
the instrument so the
orientation mark aligns
with the raised mark on
the instrument.
I
O
READ

Hach 2100P Specifications

General

Range	0 to 1000 NTU
Light Source	Tungsten filament lamp
Detector	Silicon photodiode
Operating Temperature	0 to 50 °C (32 to 122 °F)
Power	4 AA alkaline batteries
Resolution	0.01 NTU
Measurement Principle	Nephelometric
Display	LCD