User Guide

102
with the cellular engine (for example because the serial
cable is broken or because the cellular engine is not pow-
ered), if the number of available SMS is finished (menu
item P.04) or if the SIM expiration date is overrun.
• The “Power reset” and the “Watchdog reset” errors are active
only for the short time of the start-up session (selftests, pro-
cess name and version displaying). That start-up session ends
when the first measurement is acquired and displayed.
• When the Hold mode is enabled for the “Life check error”,
this error can be closed automatically if the measurement
vary enough.
Note The alarm relay (when configured to be activated) is de-
energized (fail-safe ON) continuously or with a pulse of about
5 seconds. This parameter can be configured through setup
item E.99 (“LE” stands for level and “PULS” for pulse). If
pulse is configured, a new pulse will be let out upon every
new error, no matter whether the red LED is already blinking
(i.e. some error is active) or not. When the pulse finish, the
relay is energized but the error remains still active (red LED
blinking) until the error is closed.
Note The “Digital Transmitter error” is generated by one of the
following causes:
1. Digital Transmitter is off;
2. connection problems between the Process Controller and
the Digital Transmitter;
3. EEPROM data corruption in the Digital Transmitter;
4. Digital Transmitter not calibrated;
5. the Process Controller is configured to pH while the Digi-
tal Transmitter is configured to ORP, or vice versa;
6. other failures in the Digital Transmitter excluding: life check
error, pH electrode broken or leakage, Reference electrode
broken or dirty, old pH probe, dead pH probe, temperature
probe broken error. These errors are handled separately and
exactly in the same way as if they were generated in the Pro-
cess Controller.
To understand which cause generated the “Digital Trans-
mitter error”, the Digital Transmitter must be examined through
its calibrator.