Hach 2100P User Manual

21
SECTION 2, continued
4. Press: I/O.
The instrument will turn
on. Place the instrument
on a flat, sturdy surface.
Do not hold the
instrument while
making measurements.
5. Insert the sample cell
in the instrument cell
compartment so the
diamond or orientation
mark aligns with the
raised orientation mark
in front of the cell
compartment.
Close the lid.
6. Select manual
or automatic range
selection by pressing the
RANGE key. The display
will show AUTO RNG
when the instrument is
in automatic range
selection.
7. Select signal
averaging mode by
pressing the
SIGNAL
AVERAGE
key. The
display will show
SIG AVG when the
instrument is using signal
averaging. Use signal
average mode if the
sample causes a noisy
signal (display changes
constantly).
8. Press: READ
The display will show
- - - - NTU, then the
turbidity in NTU. Record
the turbidity after the
lamp symbol turns off.
Note: The instrument defaults to the last operating mode selected. If automatic range
mode and signal averaging were used on the previous measurements, these options
will automatically be selected for subsequent samples.
I
O
SIGNAL
AVERAGE
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