Operation using the data setting device Azbil Corporation
5-22 Model MTG11A/18A, MTG11B/18B, MTG14C
Mechanism of Electrode Status Diagnostic function
Detect empty pipe condition or scale on electrode condition by monitoring flow rate
signal. Once the flow rate signal fluctuates over a certain threshold, the device judges
that the flowtube is empty or scale appears on the electrodes.
There are five threshold levels to meet an environment where the device is installed.
Set an appropriate threshold level from below.
SENSITIVITY HIGH
SENSITIVITY MID
SENSITIVITY LOW
SENSITIVITY LL
SENSITIVITY LLL
Outputs
Refer to the following table.
Output/Display
Parameter selection in the “Electrode status output mode”
OFF ZERO HOLD
Analog 4 – 20mA
output
Output values as the
meter measures.
Analog output is
fixed to 0% (4mA).
Analog output is
held at its last good
value.
Pulse output Output values as the
meter measures.
Pulse output is fixed
to 0 (does not
generate pulses).
Pulse output is held
at its present state.
Display Display the value as
it measures.
Flashes the message
0% and “Empty or
scale on electrode”
alternately (when %
flow rate is specified
for the main display).
Flashes the message
0.000 RATE and
“Empty or scale on
electrode” alternately
(when actual flow
rate is specified for
the main display).
Flashes the message
XXXXXXXX
(totalized value at
setup) and “Empty or
scale on electrode”
alternately (when
totalized value is
specified for the main
display).
Flashes the values at
its last good values
and a message of
“Empty or scale on
electrode”
alternately.
CM2-MTG300-2001.book 22 ページ ２０１５年９月２９日 火曜日 午前１０時１４分
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