General Troubleshooting Procedures; Table 13 Troubleshooting Procedures - Honeywell XYR 6000 User Manual

If low general corrosion rates are being observed, which are close to instrument baseline (< 0.05 mpy), the
Pitting Factor may appear artificially high (for example, > 0.01).
When localized corrosion is occurring, the observed general corrosion rate values may be in the range 0.1
to 10 mpy or higher, depending on the material and the environment. The Pitting Factor will tend to
exhibit higher magnitude peaks of activity during pit initiation events, whereas propagating pits may be
associated with a general increase in the observed corrosion rate and lower levels of Pitting Factor (<0.1).
The general corrosion rate in the case of propagating pits often exhibits short term variation and is
noticeably less stable than the case for general corrosion. Pitting is often accompanied by increased
variability in the B value. With increasing degrees of pit propagation, the CMI values will also tend to
increase.
6.2

General troubleshooting procedures

The XYR 6000 SmartCET transmitter is designed to operate over a broad range of corrosion rates.
However, most problems associated with the corrosion rate calculation arise when the actual corrosion rate
is extremely high, and there is likelihood that the instrument is approaching or exceeding its stated
operating limits. In some circumstances, this can be remedied by using sensors with a smaller surface
area.
Another factor to be considered is severe diffusion limiting or mass transport control of the corrosion
processes. In this case the B value determination may become difficult, and erratic behavior with very
high values may be observed. Troubleshooting procedures that deal with this condition and general
situations are shown in Table 13.
Symptom
Corrosion rate values are very
low and do not change
Revision 3 OneWireless XYR 6000 SmartCET Corrosion Transmitter User's Manual
6/24/08

Table 13 Troubleshooting procedures

Possible cause
1. Probe or probe cable fault –
bad connection to probe
electrodes
2. Transmitter fault
6. Troubleshooting
6.2. General troubleshooting procedures
Action
1. Check continuity with test cell
connected at probe end of
cable. May be necessary to
remove probe and carry out
continuity checks between
connecting pins and probe
sensing elements.
2. Check with test cell
connected directly to transmitter
terminals.
Consult with the factory for
additional information.
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