Page 6 - 6_TOC in daily practice

SCA-130-602

■ Sampling The rinsing function prevents any carry-over
The sometimes highly fibrous wastewater can effects when changing sample streams. The
clog tubes and pipes. Various mechanisms measuring program can be individually
and options are available to prevent clogging. selected for each sample stream. In addition,
The wastewater streams are sequentially the user can freely chose the measuring
transported to the analyzer using various sequence of the sample streams.
valves. Following each sample feed to the
analyzer, the valves and tubes are flushed
with fresh water and an acid rinse. This
prevents the formation of buildup in the
valves. The acid rinse and water rinse are
controlled by the TOC analyzer.

Fig.: Multi-stream suspended solids pretreatment unit

■ Recommended analyzer / Configuration

Fig. Acid Rinse option to clean tubes and
sampling system TOC-4200
Multi-stream suspended solid pretreatment
After the sample has passed the respective unit
valve, it enters the sample chamber via a Acid rinse system
strainer where it is homogenized using a
rotating knife before it is transferred to the
instrument for analysis. This way, even
samples containing large amounts of
particulate matter can be measured without
any problems. After sampling, the chamber
and the strainer are cleaned with acidified
rinsing water.