I S A
GO Systemelektronik GmbH Faluner Weg 1 24109 Kiel Germany Tel.: +49 431 58080-0
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2 Description of the ISA Spectral Analyser
The ISA Spectral Analyser with its in situ submersible sensor head is available in three versions:
•
ISA TS
BlueBox TS with integrated spectrometer sensor unit
1
•
ISA T4
BlueBox T4 with one or more external spectrometer sensor modules
•
ISA mobile
ISA TS with two accumulator batteries and a power up control module
(Power Management Module PMM) integrated in a suitcase
The ISA measures the absorbance
2
in the wavelength range from 200 to 708 nm (UV/VIS). The result of a single
measurement is each a raw spectrum and an absorbance spectrum calculated there from over the entire
wavelength range.
A spectrometer is a very multi-purpose measuring instrument because it can be implemented in very diverse
applications through a relevant calibration. In contrast to electrochemical sensors, multi-parameter meas-
urements are also possible. Moreover, the ISA offers an adjustable measuring path length whereby the num-
ber of potential applications is increased even more.
A great advantage of the ISA is the special coating of the glass plates in the measuring path. Combined with
the possibility to automatically clean the measuring section with compressed air, the ISA achieves very long in
service times and maintenance intervals.
Only the optics and the compressed air cleaning are integrated into the high grade steel (material number
1.4404) or titanium sensor head. The entire control- and analysis-electronics are mounted in a BlueBox TS
with integrated spectrometer sensor unit or in an external spectrometer sensor module. The ISA is thereby
usable in a high temperature range (up to 110 °C). ISA is thus suitable for use in medicine or in the food indus-
try, since the measuring head can be sterilized at high temperatures.
All necessary settings are stored in the spectrometer unit, so the external spectrometer sensor modules can
be connected to another BlueBox without changing the BlueBox settings.
3
The ISA can be used in potentially explosive areas, for details see
5.2 ATEX Notes
.
The properties of the ISA in summary:
•
Connection of the only optical sensor head with the analysis unit via the sensor head cable
(integrates two fibre optic cables and a compressed air line).
•
Measuring path length freely adjustable from 0.5 – 20 mm
•
Cleaning of the measuring section with compressed air
•
Suitable for a wide temperature range (0 °C to +110 °C)
•
Recording of absorbance spectra and raw spectra in the range 200 – 708 nm
•
Saving of raw data and calibrated data
•
Calibration and service software
•
Remotely transferable calibration algorithms for parameter calculation
•
Adjustment of calibration by remote maintenance
•
Multi-parameter calculation
•
Simple installation
•
High cost-efficiency
1
Further sensor units can be connected with external sensor modules via the CAN-bus interface.
2
In absorption, radiation is absorbed by a substance. Further attenuating effects due to scattering or reflection are summarized
in the optics together with the absorption under the term
absorbance
, also called
extinction
.
3
Applies only to current spectrometers, see
2.2 Notes on the Compatibility of Current and Older Spectrometers
