Extended diagnostic functions
72 - EN FEX300, FEX500 CI/FEX300/FEX500-EN
8.3.2 Limit values for the electrode deposits
Electrode deposit monitoring is switched off (factory default). Monitoring can be switched on in
the "Diagnostics / Diagnosis Control / Coating Detector" menu.
Parameter Factory setting
Coating QE Min Alarm 0 ohms
Coating QE Max Alarm 100.000 ohms
Recommended settings in the "Diagnostics / Diagnostic Functions / Electrode Deposits"
menu
• Coating QE Min Alarm = 0.5 x Coating Value QE
• Coating QE Max Alarm = 2.0 x Coating Value QE
Important (Note)
The deposit value QE is the mean value of Startup Fingerprint QE1 and QE2. The value is
determined using the following formula:
QE = (Startup Fingerprint QE1 + Startup Fingerprint QE2) / 2
8.3.3 Limit values for the electrode impedance
Electrode impedance monitoring is switched off (factory default). Monitoring can be switched on
in the "Diagnostics / Diagnosis Control / Cond. Detection" menu.
Parameter Factory setting
Elec.Imp.Min Alarm 0 ohms
Elec.Imp.Max Alarm 20.000 ohms
The limit values for parameters "Elec.Imp.Min Alarm" and "Elec.Imp.Max Alarm" depend on
the fluid conductivity and must be determined on site.
Recommended settings
• Elec.Imp.Min Alarm = 0.2 x average impedance value
• Elec.Imp.Max Alarm = 3.0 x average impedance value
Important (Note)
The average impedance value is the value of Startup Fingerprint "Elec. Imp. E1-GND" and
"Elec. Imp. E2-GND". The value is determined using the following formula:
Average impedance value = (Startup Fingerprint "Elec. Imp. E1-GND" + Startup Fingerprint
"Elec. Imp. E2-GND") / 2
8.3.4 Recommended settings for the Trend Logger
"Diagnostics / Trend" menu
• Logtime Interval = 43,200 minutes
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