YOKOGAWA Rotamass series User Manual

Zero point unstable
General Instruction Manual
Troubleshooting
IM 01U10B00-00EN-R, 3rd edition, 2018-07-09
81 / 90
10.2 Zero point unstable
Malfunction Possible causes Remedy
Zero point
unstable
Measuring tube not
completely filled with
fluid
– Check that the measuring tube in the
sensor is completely filled with fluid.
Correct installation, see [}21].
Bubbles or solids in
the fluid
– Check pipe and sensor installation,
see [}27].
– Correct installation, see [}21].
No electrical
grounding
– Ground transmitter and sensor,
see [}44], and [}63].
– Check correct connection of connecting
cable shield on transmitter.
Flow meter installed in
proximity to facilities
with strong electro-
magnetic field
– Ground transmitter and sensor,
see [}44], and [}63].
– 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
sensor 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).

YOKOGAWA Rotamass series Specifications

General

Brand	YOKOGAWA
Model	Rotamass series
Category	Measuring Instruments
Language	English