Analytik Jena multi EA 4000 User Manual

System design
26 Edition 01/2016 multi EA 4000
1 "valve" connection to the C/S module
2
"analyte" connection to the C/S module
3
gas connection "O
2
" for oxygen
4
mains cable
5
"COM" connection to the C/S module or Cl module
6
"pump" connection to the C/S module or Cl module
7
gas connection "Ar" for argon during Cl measure-
ments and pyrolysis
8
"out" connection – measuring output
Fig. 8 Connections on the rear of the multi EA 4000
4.3 C/S module
C/S module versions
The C/S detector module is available in three versions:
 the C/S module with
CO
2
and SO
2
detectors for the simultaneous detection of carbon and sulfur
 the C/S module with
CO
2
detector for the detection of carbon
 the C/S module with
SO
2
detector for the detection of sulfur
The control electronics is always integrated into the C/S module.
Detectors
The NDIR detectors (non-dispersive infrared absorption detector) are behind the rear right-
hand side panel of the analyzer.
Gases with molecules from different atoms have specific absorption bands in the infrared
wavelength range. When a light beam is sent through an arrangement of cells which con-
tains gases in the active IR range, these gas components absorb the characteristic wave
lengths with their proportional share of the total radiation according to their concentration in
the gas mixture.
The detectors used in the C/S module are selective for CO
2
and SO
2
.
Measurements using the VITA method
The CO
2
/SO
2
molecules are detected by the measuring technology as long as they remain in
the cell of the NDIR detector. Fluctuations of the measuring gas flow during the CO
2
/SO
2
measurement lead to CO
2
/SO
2
molecules sometimes being detected for longer (low gas
flow) or shorter (high gas flow) periods of time.
Using the VITA method (dwell time coupled integration for TOC analyses) the measuring gas
flow is detected parallel to the NDIR signal. Occurring flow variations are compensated to a

Analytik Jena multi EA 4000 Specifications

General

Brand	Analytik Jena
Model	multi EA 4000
Category	Measuring Instruments
Language	English