Thermo Scientific Barnstead GenPure xCAD Plus System, Руководство по эксплуатации

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Thermo Scientific GenPure
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How the system functions
Tap water that has been pretreated upstream by reverse osmosis, ion exchange or distillation flows
through a pressure reducer and into the ultrapure water system, where the conductivity is monitored. A
pump directs this feedwater through UV-photooxidation (only possible in UV lamp equipped systems)
and then through the ultrapure cartridge. From there the water flows through an ultrafiltration module
(only possible in UF equipped systems). Then follows a permanent definition of conductivity
measured by a special conductivity measuring cell equipped with temperature compensation. When
ultrapure water is dispensed from the system, it flows through a a end filter before reaching the point of
use. During Interval operation, the water in the system is circulated in an internal circuit at regular
intervals.
Systems with UV-TOC, UV-TOC/UF
Tap water that has been pretreated upstream by reverse osmosis, ion exchange or distillation passes
through a pressure reducer and into the ultrapure water system, where the conductivity is monitored. A
pump directs this feedwater through UV-photooxidation, which follows a conductivity measurement
to determine the TOC value. Then follows an ultrapure cartridge and an ultrafiltration module (only
with UV-TOC/UF), and the conductivity is then permanently measured by a special measuring cell
(with temperature compensation). When ultrapure water is taken from the system, it flows through a
final filter before reaching the dispensing outlet. During Interval operation, the water in the system is
recirculated in an internal circuit at regular intervals.
The TOC value is calculated by taking the difference between the values measured by the measuring
cells QIA300 and QI302. The measurement range is 0 - 30 ppb. When this range is exceeded, the
number 99 is shown in the display instead of the measured value.
In Stand-by operation, “___” is shown.
System Function as applied in all GenPure systems