User Guide

101
(*): When the Digital Transmitter is used, these errors are
generated in the Digital Transmitter, but they are handled as
if they were generated in the Process Controller.
• If the condition to generate a “Reference electrode broken
or dirty” error is met, the error is not generated immedi-
ately, but first auto-cleaning is performed up to 2 times (the
cleaning type depends upon relays configuration).
If the Reference electrode is not OK after two auto-cleanings,
the “Reference electrode broken or dirty” error is generated.
Note The second auto-cleaning cycle is done only when the first
one is not enough.
Note Both the cleaning modes (simple and advanced cleaning),
when enabled through the relay mode items, are triggered
upon the “Reference electrode broken or dirty” error.
• The “pH electrode broken or leakage” and the “Reference
electrode broken or dirty” errors are never generated if the
correspondent tests are not enabled through setup items I.13
and I.14. The Reference electrode test can not be made if the
Potential matching pin is not in use (see setup item I.04).
• The 3.6 mA fault current is always off unless the 4-20 mA
output has been configured; the 22 mA fault current is
always off unless the 0-20 mA or 4-20 mA output has
been configured.
The 3.6 mA and the 22 mA fault current cannot be both set
to ON. If two errors are active when output is configured
as 4-20 mA (#1 or #2), and one of them is configured for
the 22 mA fault current, while the other one is configured
for the 3.6 mA fault current, the 22 mA current is let out to
the analog output.
The fault current is automatically disabled when the ana-
log output is used for controlling (item O.10 equal to “SEt”),
no matter whether the fault current itself has been config-
ured “On” or “OFF”.
• In case of a “Temperature probe broken” error, the fault cur-
rent, if configured, is let out to both analog outputs (unless
O.20 is equal to “SEt”). In all the other cases only the first
analog output (for pH and ORP) can let out the fault current.
• The “Cellular error” is never activated if the serial lines are
not configured for cellular module connection. The error
will be active if the instrument is not able to communicate