Hach 2100Q User Manual

8.9 Indexing a single cell
Precise measurements for very low turbidity samples require the use of
a single cell for all measurements or optically matching the cells. Use
one cell to provide the best precision and repeatability. When one cell is
used, an index or orientation mark (other than the factory-placed
diamond) can be placed on the cell so it is inserted into the instrument
with the same orientation each time.
When using a single cell, make an index or orientation mark on the cell
as follows:
20 English

Hach 2100Q Specifications

General

Range	0 - 1000 NTU
Resolution	0.01 NTU on lowest range
Detector	Silicon photodiode
Stray Light	< 0.02 NTU
Measurement Method	Nephelometry
Power Supply	4 AA alkaline batteries
Operating Temperature	0 to 50 °C
Storage Temperature	-20-60°C
Measurement Modes	Signal Averaging, Rapidly Settling Turbidity
Display	LCD
Accuracy	±2% of reading plus stray light from 0 to 1000 NTU
Light Source	Tungsten filament lamp