Hach 2100P User Manual

43
SECTION 3, continued
Preparing the 20, 100 and 800 NTU standards
Table 1 Formazin Standard Preparation
Step 1 Step 2 Step 3
Standards
20 NTU Add 100 mL of
dilution water to a
clean 200-mL class
A volumetric flask.
With a TenSette*
pipet, add 1.00 mL
of well-mixed
4000 NTU Formazin
stock solution to the
200-mL flask.
* A class A volumetric pipet may be used in place of a TenSette Pipet.
Dilute to the mark
with dilution water.
Stopper and mix.
100 NTU Add 100 mL of
dilution water to a
clean 200-mL class
A volumetric flask.
With a TenSette
pipet, add 5.00 mL
of well-mixed
4000 NTU Formazin
stock solution to the
200-mL flask.
Dilute to the mark
with dilution water.
Stopper and mix.
800 NTU Add 50 mL of
dilution water to a
clean 100-mL class
A volumetric flask.
With a TenSette
pipet, add 20.00 mL
of well-mixed
4000 NTU Formazin
stock solution to the
100-mL flask.
Dilute to the mark
with dilution water.
Stopper and mix.

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