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11.5
Monitoring the pH or redox values
This function is used to define the behaviour of the device if problems arise on the pH probe (glass elec-
trode and/or reference electrode) or the redox probe (reference electrode only).
Refer to section 8.10 to access the "Diagnostics" menu.
Diagnostics
Mx:pH/ORP
A malfunction in your process or on the measurement probe may be revealed by too low or too high value
of the impedance.
To be warned when the impedance measurement is out of range:
→ activate monitoring of fluid impedance in the "Status" function, and then
→ set an impedance range outside of which the 8619 generates a "warning" event and displays the icons
and
;
→ set an impedance range outside of which the 8619 generates an "error" event and displays the icons
X
and
.
When a "warning" or "error" event is generated by the 8619:
→ go into the "Information" menu to read the cause of generation of this event;
→ and/or read the measured impedance value;
→ if necessary, clean the probe and/or recalibrate the measurement sensor;
→ if necessary, check the process.
• The "warning" event may also be associated with one and/or other digital outputs. See section 9.26.
• A current of 22 mA may be emitted on one and/or other of the current outputs when an "error" event
related to either the monitoring of the fluid pH, redox, conductivity or temperature values or the moni-
toring of an analogue input is generated. See section 9.25.
• See also section 16.3 If you encounter problems.
170
Glass electrode
Ref. electrode
English
State:
ON/OFF
Impedance:
READING
Dépend. temp.
ENTERING
Warning high:
ENTERING
Warning low:
ENTERING
Error high:
ENTERING
Error low:
ENTERING
State:
ON/OFF
Impedance:
READING
Warning high:
ENTERING
Warning low:
ENTERING
Error high:
ENTERING
Error low:
ENTERING
Type 8619
Diagnostics Menu
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