Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 108 August 2021
6.3 Changing the Anti-Solarant Solution
Radiation generated by the analyzer’s broadband UV Source Lamp in the short wavelength UV
region (wavelength <200 nm) may degrade the transparency of the optical fibres to ultraviolet
radiation in the measurement region over a period of time. An optical fibre directly exposed to
the broadband source will eventually develop an absorption band that reduces fibre
transmittance at wavelengths below 250 nm.
The degree of fibre degradation is a function of accumulated exposure time. The Anti-Solarant
Solution incorporated into the analyzer provides a high-pass liquid optical filter with a sharp cut-
off region. The Anti-Solarant Solution filters out the short wavelength UV radiation which is the
cause of the fibre degradation and prevents it from entering the fibre where it can cause
damage. RUNNING A BRIMSTONE-943 ANALYZER WITHOUT ANTI-SOLARANT
SOLUTION WILL NOT AFFECT THE ANALYSIS RESULTS. HOWEVER, OPERATING IN
THIS MANNER COULD CAUSE IRREVERSIBLE DAMAGE TO THE ANALYZER’S OPTICAL
FIBRES, AND SIGNIFICANTLY SHORTEN THEIR LIFESPAN.
The Anti-Solarant Solution will eventually degrade to the point where it absorbs too much energy
causing the integration period to approach the maximum of 1000 ms. When the analyzer is
exhibiting a loss of spectrometer signal level (a high integration period >500ms required to reach
28,000 A/D counts), and all other potential causes of loss of spectrometer signal have been
ruled out (dirty cell windows, lamp near the end of its lifespan, damaged optical fibres), the
cause of the low response is likely expired anti-solarant solution. Under these circumstances,
the anti-solarant solution will need to be replaced.
Wear protective UV eye glasses at all times if the optical fibres are removed while
the UV Source Lamp is powered up.
The control cabinet door should NOT be opened while the analyzer is energized
UNLESS the area is known to be non-hazardous. To open the cabinet door while the
analyzer is energized, it will be necessary to bypass the purge control box. Refer to
section 3.3.
The anti-solarant solution should only be changed only by authorized personnel. It
is not necessary to turn the UV source lamp off to perform this procedure. The UV
lamp lifespan can be reduced by additional ON/ OFF cycles.
The fluid holder may be warm. Wear Gloves when handling the fluid holder.
Always handle optical fibres carefully and avoid any contact with the end of the fibre.
Before proceeding with the following procedure, ensure that the analyzer is Off Line
and purged with zero gas.
Always handle optical fibres carefully and avoid any contact with the end of the fibre
when it is disconnected. Before proceeding with the following procedure, ensure
that the analyzer is Off Line and purged with zero gas.
Refer to Figure 72 while performing the following procedure.