CIANFLONE 2501XBT, Инструкция по эксплуатации и безопасности

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5. OPERATING THE PORTASPEC
5-6
5.6. Water Cooling
The Portaspec has the ability to operate without water cooling if you are using it at
a low mA setting and for short time intervals. However, operating at higher mA
settings for longer time intervals will turn off the x-rays automatically, without damage
to the instrument, and the overheat condition will occur. A recovery period from 15 to
30 minutes, depending on ambient temperature, is needed for the cool down cycle
without water cooling. Cooling water can be added at any time to eliminate this
condition. A water flow rate of approximately 1 qt/min at a temperature from 90º to
105º F would be ideal for the Portaspec.
For continuous operation, the Portaspec may be cooled with either filtered tap water
or a closed loop water circulating system. The Catalog No. 2522X Coolant Circulator
connect directly to the water fittings and has the ability to maintain x-rays for long
periods of time.
WARNING: The circulating water temperature should never be lower than the dew
point of the ambient air. This condition could cause condensate to
form in the interior of the Portaspec and cause damage to the detector
tube and/or the x-ray tube thin beryllium window.
In considering your needs for water cooling, the hardness of tap water should also be
taken into account. The x-ray tube housing contains fittings with small orifices that
will clog over time if the water contains an excessive amount of minerals. A filter is
recommended to eliminate these impurities.
Use a mixture of methanol, water and soluble oil such as Altra Soluble AP Plus or
equivalent, at the mixing ratios listed on the bottle available from Cianflone Scientific.
Ethylene glycol solutions and biocides should not be used if you select a closed loop
system. This will ensure that no deposits will form in the water tubing and the best
possible heat exchange will occur over long periods of time.