Metal Samples MS2500L, Руководство оператора

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3. Direct fluid impingement on the probe’s electrodes (at a very high velocity of about 10-feet-per-
second or so), should be avoided as this usually results in abnormally high corrosion rates aggra-
vated by erosion.
4. The probe should not be installed in a position where solids are likely to collect. Solids can build up
on the probe base and electrically short out the electrodes.
5. Any surface area in contact with a hydrocarbon phase or gas phase will not be corroding. There-
fore, representative maximum corrosion rates are obtained when the total Test electrode surface is
in water or electrolyte.
6. A bypass loop around a section of the main piping may be considered. Probe inspection and
electrode replacement can be made without system shutdown. Effects of velocity can be checked
by throttling of bypass valves.
The above is furnished as a general guideline. The existing physical facilities of most systems will dictate
the probe location. If this turns out to be in conflict with the ideal considerations, the probe should be
installed keeping in mind the problems that may arise.
F. PAIR
TM
Probe Assembly
All probes with replaceable electrodes are shipped with the electrodes and gaskets in a separate packet
if the electrodes are purchased with the probes.
When ready to install, open the packet and place one of the gaskets on each of the three mounting pins.
Pin A is connected to the Reference electrode, Pins B and D are connected to the Test electrode and Pin
C is connected to the Auxiliary electrode.
Figure 5. Electrode Mounting Configurations