Electrode Coating Detection; Conductivity Monitoring; Electrode Impedance Monitoring - ABB ProcessMaster FEP300 Manual Del Usuario

8.1.3

Electrode coating detection

This function provides the opportunity to detect coatings on the measuring electrodes by using
an adjustable maximum limit value.
When the set limit value is exceeded, an alarm is tripped via the programmable digital output,
depending on the configuration.
Conditions for using the function:
• This function is available in the nominal diameter range
• The signal cable length of the remote transmitter must not exceed a maximum value of 50 m
(164 ft) .
• For this function, the conductivity of the measuring medium must be in the range
20 μS/cm ... 20,000 μS/cm.
Additional installation conditions:
• When using plastic tubes, install a grounding plate at the front and back of the device.
8.1.4

Conductivity monitoring

The conductivity of the fluid is monitored by using an adjustable minimum / maximum limit
value.
When the value falls below or exceeds the set limit value, an alarm is tripped via the
programmable digital output, depending on the configuration.
Conditions for using the function:
• This function is available in the nominal diameter range
• The signal cable length of the remote transmitter must not exceed a maximum value of 50 m
(164 ft) .
• For this function, the conductivity of the measuring medium must be in the range
20 μS/cm ... 20,000 μS/cm.
Additional installation conditions:
• When using plastic tubes, install a grounding plate at the front and back of the device.
• There must not be any deposits on the measuring electrodes.
1) The specified nominal diameter range is valid for ProcessMaster, only. The nominal diameter range valid for
HygienicMaster is DN 10 ... 100 (3/8 " ... 4 ").
8.1.5

Electrode impedance monitoring

The impedance between the electrode and ground is monitored by using a minimum / maximum
limit value. This enables the transmitter to detect an electrode fine short or leakage.
When the value falls below or exceeds the set limit value, an alarm is tripped via the
programmable digital output, depending on the configuration.
Conditions for using the function:
• This function is available in the nominal diameter range
• The signal cable length of the remote transmitter must not exceed a maximum value of 50 m
(164 ft) .
• For this function, the conductivity of the measuring medium must be in the range
20 μS/cm ... 20,000 μS/cm.
Additional installation conditions:
• When using plastic tubes, install a grounding plate at the front and back of the device.
• There must not be any deposits on the measuring electrodes.
• The measuring tube must always be completely full, and the fluid must feature only minor
conductivity variations.
CI/FEX300/FEX500-X1 FEX300, FEX500
Extended diagnostic functions
2)
of DN 10 ... 300 (3/8 " ... 12 ").
1)
of DN 10 ... 300 (3/8 " ... 12 ").
1)
of DN 10 ... 300 (3/8 " ... 12 ").
EN - 67