Function and setup
multi EA 4000
24
3.3
C/S module
The C/S detector module is available in three versions:
the C/S module with
CO
2
and SO
2
detectors for the simultaneous determination of carbon and
sulfur
the C module with
CO
2
detector for the determination of carbon
the S module with
SO
2
detector for the determination of sulfur
The control electronics is always located in the C/S module.
The NDIR detectors (Non-Dispersive Infrared Absorption Detector) are located behind
the rear right side panel of the analyzer.
Gases with molecules from different atoms have specific absorption bands in the infra-
red range. When a light beam is sent through an arrangement of cells, which contains
active IR gases, these gases absorb the characteristic wavelengths of the total radia-
tion. The share is proportional to their concentration in the gas mixture.
The detectors used in the C/S module are selective for CO
2
and SO
2
.
The CO
2
/SO
2
molecules are detected by measuring technology as long as they remain
in the cell of the NDIR detector. Due to fluctuations of the measuring gas flow during
the CO
2
/SO
2
measurement the CO
2
/SO
2
molecules are sometimes detected by spec-
trometry for a longer (low gas flow) or shorter (higher gas flow) time.
Using the VITA method (dwell time coupled integration for TOC analyses), the measur-
ing gas flow is detected parallel to the NDIR signal. Occurring flow variations are com-
pensated to a constant gas flow by computer-controlled normalization of the signal
and only integrated afterwards.
To this end, a flow regulator has been arranged very close to the NDIR detector flow.
A flow regulator monitors the required intake flow; the values are recorded in the soft-
ware. Deviations from the permissible target value are displayed and the oxygen flow
can be corrected at the "pump" valve of the flow regulator of the basic device multi EA
4000 (3 in Figure 7). During a measurement, the values are used for the integral cor-
rection using the VITA method.
The green LED at front of the analyzer illuminates after the module has been switched
on. On the rear are the mains switch with mains input and fuse holder, the connec-
tions for connecting to the basic device and the other add-on modules and the inlets
and outlets for the measuring gas flows.
Versions of the
C/S module
Detectors
Measurements using the
VITA method
Gas flow control
Connections
Summary of Contents for Analytik Jena multi EA 4000
Page 1: ...Operating Manual multi EA 4000 Elementary analyzer C S and Cl solids analysis...
Page 50: ...Commissioning multi EA 4000 50 Figure 32 multi EA 4000 C S Hose diagram...
Page 52: ...Commissioning multi EA 4000 52 Figure 33 multi EA 4000 Cl Hose diagram...
Page 54: ...Commissioning multi EA 4000 54 Figure 34 multi EA C S Cl for C S measurements Hose diagrams...
Page 55: ...multi EA 4000 Commissioning 55 Figure 35 multi EA 4000 C S Cl for Cl measurements...
Page 57: ...multi EA 4000 Commissioning 57 Figure 36 Automatic TIC solids module Hose diagrams...
Page 58: ...Commissioning multi EA 4000 58 Figure 37 multi EA 4000 C S with automatic TIC solids module...
Page 61: ...multi EA 4000 Commissioning 61 Figure 39 multi EA 4000 C S Cl with man TIC solids module...
