Operating Instructions FLOWSIC100
Gas Velocity Monitor
Safety Instructions
8012513/03-2008
©
SICK MAIHAK GmbH · Germany · All rights reserved 9
1.3.2 Danger from Electrical Equipment
The FLOWSIC100 measuring system is an item of electrical equipment designed for use in
industrial power installations. When working on power connections or on live components,
make sure that the power supply is switched off. If necessary, replace shock protection
measures before reconnecting the power supply.
1.3.3 Danger due to Hot, Corrosive, or Pressurized Gases
The sender/receiver units are mounted directly on the gas-carrying duct. In installations
with a low hazard potential (no risk of injury, ambient pressure, low temperatures, no risk of
explosion), these units can be installed and removed while the installation is in operation,
provided that the applicable specifications and safety regulations for the installation are
adhered to and all necessary and suitable protective measures are taken.
Warning
Plants and processes with toxic gases, high pressure, or high temperatures, must be shut
down before the sender/receiver units are installed or removed.
1.3.4 Behaviour at Purge-air Failure
Some system versions are equipped with a purge-air unit to protect the ultrasonic
transducers from hot or corrosive gases. The transducers can be quickly destroyed if the
purge-air supply fails. For this reason, the operator must ensure that:
• The power supply for the purge-air unit operates reliably and without interruption,
• A failure on the purge-air supply is detected immediately (for example, by using pressure
monitors),
• The sender/receiver units are removed from the duct in the event of a purge-air failure
and the duct openings are covered (for example, with a flange cover).
1.3.5 Detecting Malfunctions
Any deviations from normal operation must be regarded as a serious indication of a
functional impairment. These include:
• Significant drifts in the measurement results,
• Increased power consumption,
• A rise in system component temperature,
• Triggering of monitoring devices,
• Unusually strong vibrations / unusual operating noise from a purge-air fan,
• Smoke or unusual odors.
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