YOKOGAWA Rotamass series User Manual

General Instruction Manual
Troubleshooting
Display deviating
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IM 01U10B00-00EN-R, 3rd edition, 2018-07-09
10.3 Display deviating
Malfunction Possible causes Remedy
Flow rate dis-
played deviates
from actual flow
rate
Zero point set
incorrectly
– Set zero point, see [}74]
Highest and lowest
value for mass flow
set incorrectly
– Match settings of flow meter and reading
system.
– Check LRV and URV process parame-
ters, see software instruction manual.
Measuring tubes not
completely filled with
fluid
– Correct installation, see [}27]
Bubbles in fluid
– Check pipe and installation, see [}27].
– Correct installation, see [}27]
Connecting cable in-
correctly connected
for remote type
– Check cable connections and correct, if
necessary, see [}46].
Density displayed
deviating from
actual density
Density unit, highest
and lowest value for
density set incorrectly
– Match settings of flow meter and reading
system.
– Check LRV and URV process parame-
ters, see software instruction manual.
Fixed density
– Check whether the Val sel parameter is
set correctly. If a fixed value is selected,
ensure that the parameter Fix val is set
correctly, see software instruction
manual.
– Set parameter Val sel to Meas val,
see software instruction manual.
Analog output trim
was performed incor-
rectly
– Correctly perform trimming, see
applicable software instruction manual.
No electrical
grounding
– Ground transmitter and sensor,
see [}44].
– Check correct connection of connecting
cable shield on transmitter.
Bubbles in fluid
– Check pipe and installation, see [}27].
Connecting cable in-
correctly connected
for remote type
– Check cable connections and correct, if
necessary, see [}46].
Faulty temperature
measurement
– Check temperature measurement circuits
TP1 – TP3 of connecting cable.
Corrosion and erosion
– If corrosion or erosion due to corrosive
fluids is suspected, contact Yokogawa
and have density and mass flow recali-
brated, if necessary.
Contaminated
measuring tubes
– Clean measuring tubes.

YOKOGAWA Rotamass series Specifications

General

Brand	YOKOGAWA
Model	Rotamass series
Category	Measuring Instruments
Language	English