Hach-Lange 2100 N IS Laboratory Turbidimeter User Manual - Manual (Page 4)

Prepare the sample ..........................................................................................................................................................................21
Prepare a representative sample ..............................................................................................................................................21
Remove air bubbles from the sample .......................................................................................................................................21
Apply a vacuum .................................................................................................................................................................21
Use an ultrasonic bath .......................................................................................................................................................21
Apply heat..........................................................................................................................................................................21
Prevent condensation on a sample cell ....................................................................................................................................22
Measure over-range samples ...................................................................................................................................................22
Sample dilution ..................................................................................................................................................................22
Turbidity measurement ....................................................................................................................................................................23
Measurement notes ..................................................................................................................................................................23
Turbidity measurement procedure ............................................................................................................................................24
Measurement techniques .................................................................................................................................................................25
Manual or automatic ranging ....................................................................................................................................................25
Signal averaging on or off .........................................................................................................................................................25
Using the air purge system .......................................................................................................................................................25
Using a flow cell ........................................................................................................................................................................26
Install a flow cell ................................................................................................................................................................26
Clean a flow cell assembly ................................................................................................................................................26
Flow cell maintenance .......................................................................................................................................................27
Flow cell operation .............................................................................................................................................................27
Flow cell storage ................................................................................................................................................................27
Using a manual flow cell ....................................................................................................................................................27
Use a cell adapter .....................................................................................................................................................................27
Install a cell adapter ...........................................................................................................................................................28
Remove a cell adapter .......................................................................................................................................................28
Connect to a printer or computer .....................................................................................................................................................28
Configure the printer output .............................................................................................................................................................28
Configure the RS232 connection .....................................................................................................................................................28
Computer (RS232) commands ........................................................................................................................................................29
Advanced operation
..................................................................................................................................................................29
Calibrate the turbidimeter with formazin standards ..........................................................................................................................29
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