YOKOGAWA Total Insight series, Краткое руководство по эксплуатации

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Quick Reference Instruction Manual
Troubleshooting
Zero point unstable
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IM01U10A00-00EN-R, 2nd edition, 2017-08-29
9.2 Zero point unstable
Malfunction Possible causes Remedy
Zero point unstable
Measuring tube not completely
filled with medium – Check that the measuring tube in the sensor
is completely filled with medium.
Bubbles or solids in the
medium
– Check pipe and sensor installation, see
[
}
16] .
– Correct installation, see [ } 13] .
No electrical grounding
– Ground transmitter and sensor, see ground
connections and sensor circuits [
}
31] , and
connect power supply and external devices
[ } 46] .
– Check correct connection of connecting cable
shield on transmitter.
Flow meter installed in proxim-
ity to facilities with strong elec-
tro-magnetic field
– Ground transmitter and sensor, see ground
connections and sensor circuits [
}
31] , and
connect power supply and external devices
[ } 46] .
– Install flow meter as far away as possible
from these electric devices.
Mechanical strain from traction
or pressure
– Eliminate cause for mechanical tension.
Terminal board or connection
terminals of transmitter or sen-
sor soiled or damp
– Clean terminal board and connection
terminals.
– Clean transmitter and/or sensor.
– Dry transmitter and/or sensor.
– Seal transmitter and/or sensor tightly.
Influence of external vibration
– Install mechanical dampers
– Increase parameter mass flow damping (see
applicable software instruction manual)
9.3 Display deviating
Malfunction Possible causes Remedy
Flow rate displayed
deviates from actual
flow rate
Zero point set incorrectly – Set zero point.
Highest and lowest value for
mass flow set incorrectly
– Match settings of flow meter and reading
system.
– Check LRV and URV process parameters,
see software instruction manual.
Measuring tubes not com-
pletely filled with medium
– Correct installation, see [ } 16]
Bubbles in medium
– Check pipe and installation, see [ } 16] .
– Correct installation, see [
}
16]
Connecting cable incorrectly
connected for remote type – Check cable connections and correct, if
necessary, see
[
}
33] .