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2.1 Intended use
The magnetic inductive flow sensor FMG90 must only be used for measuring and metering
liquids with a minimum conductivity of 20 μS/cm.
WARNING! No safety component!
The magnetic inductive flow sensor of the series FMG90 are not safety components in
accordance with Directive 2006-42-EC (Machine Directive).
ª Never use the FMG90 as a safety component.
The operational safety of the device supplied is only guaranteed within its intended use. The
specified limits (see Technical Data "10") may under no circumstances be exceeded.
Before installing the device, check that the wetted materials of the device are compatible with
the media being used (see Materials Table "10.1").
Measuring tube empty (or partially filled). / Conductivity too low.
The green LED may blink irregularly if the measuring tube of the FMG90 is empty or
partially filled or if the conductivity of the fluid being used is too low. Random pulses will
be present at the output, but they do not represent an actual flow.
ª Ensure that the measuring tube of the FMG90 is always completely filled (see
Installation Instructions "5.1").
ª Ensure that the conductivity of the fluid is at least 20 μS/cm.
2.1 Exclusion of liability
We accept no liability for any damage or malfunctions resulting from incorrect installation,
inappropriate use of the device or failure to follow the instructions in this operating manual.