Description
3.3 ULTRAMAT 7
Operating with the Local User Interface
26 Operating Manual, 06/2017, A5E31930478-05
The ULTRAMAT 7 can simultaneously measure up to 4 infrared-active measuring
components.
The measurements are based on the molecular-specific absorption of infrared radiation
bands (absorption bands). ULTRAMAT 7 analyzer modules use a spectral range which
includes wavelengths of 2 to 9 µm. Although the absorbing wavelengths are characteristic of
individual gases, they may partially overlap. This results in cross-sensitivities which are
reduced to a minimum by the following measures:
● Beam splitter (gas filter)
● Double-layer detector, each gas compartment with adjustable weighting between the first
and second detector layer
● Application-specific factory-fitted interference filter
ULTRAMAT 7 analyzer modules operate according to the infrared push-pull chopped
radiation principle and are equipped with a double-layer detector.
A source with a temperature of approximately 600 °C generates infrared radiation which is
emitted in the beam splitter. The beam splitter acts as a filter chamber and divides the beam
equally between the sample gas and reference gas compartments.
The chopper produces a periodic modulation of the infrared radiation, and thus enables
relaxation of the detector.
The reference beam passes through the reference chamber and enters the detector
chamber virtually unattenuated. The detector chamber is filled with a precisely defined
concentration of the gas component to be measured. The sample beam, in contrast, passes
through the sample chamber filled with sample gas and enters the detector chamber
attenuated to various degrees. The degree of attenuation depends on the respective sample
gas concentration.
The detector is designed as a double-layer detector. The detector layer at the source end
serves primarily to absorb the middle of the band. The band edges, however, are absorbed
equally by both of the layers.
The detector layers at both compartments of the detector are pneumatically connected to
each other via a microflow sensor. This sensor element converts the pressure difference in
the detector into an electrical signal.
The weighting between the first and second detector layer is preset at the factory depending
on the application. This minimizes the effect of interfering components.
To ensure the long-term stability of the measured value, the ULTRAMAT 7 analyzer module
supports the predictive self-diagnostics of the analyzer. This function enables you to plan
maintenance measures in a timely manner.
To Next Page
Loading...
Need help?
General
