Extended Diagnostic Functions; General Remarks; Detection Of Partial Filling; Detection Of Gas Bubbles - ABB ProcessMaster FEP300 Manual Del Usuario

Extended diagnostic functions

8 Extended diagnostic functions
8.1

General remarks

IMPORTANT (NOTE)
• The extended diagnostic functions are available for ProcessMaster 500 and
HygienicMaster 500 only.
• The "Partial Filling Detector" function is not available for HygienicMaster 500.
• When using the extended diagnostic functions the external flowmeter sensor must not be
provided with a preamplifier.
• To facilitate initial start-up, the extended diagnostic functions are deactivated (factory
default).
• To use the extended diagnostic functions, a "start-up fingerprint" must be created during
start-up of the flowmeter.
• Each diagnostic function (e.g. Gas Bubble Detector or Electrode Deposit Detector) can be
individually activated. Once activated, the diagnostic function must be calibrated according
to the conditions on site and the limit values must be set.
8.1.1

Detection of partial filling

Optionally, a measuring electrode (TFE electrode) is available for detecting a partially filled
flowmeter sensor. The alarm for partial filling is output via the programmable digital output.
Conditions for using the function:
• Nominal diameter from DN 50 (2") with sensor design level B
• Max. signal cable length for version with external transmitter 200 m (656 ft).
Conductivity of the measuring medium: 20 μS/cm ... 20,000 μS/cm
•
• The function is only available for ProcessMaster 300 / 500 without explosion protection or
with explosion protection for Zone 2 / Div 2.
Additional installation conditions:
• The flowmeter sensor must be installed horizontally with the terminal box pointing upward.
8.1.2

Detection of gas bubbles

Gas bubbles in the fluid are detected by using an adjustable maximum limit value. When this
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:
• The flowmeter sensor can be installed either horizontally or vertically. Vertical installation is
preferred.
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 ").
66 - EN FEX300, FEX500
1)
of DN 10 ... 300 (3/8 " ... 12 ").
CI/FEX300/FEX500-X1