94 FLOWSIC600-XT · Operating Instructions · 8018846/1BHP/V2-1/2021-05 · © SICK Engineering GmbH
Commissioning and Operation
Subject to change without notice
4.4.5 Path failure compensation
The FLOWSIC600-XT can compensate failed measuring paths. A path is considered failed
when its acceptance rate is below a certain limit. It is then no longer used to create
measured values, but is substituted by a configured or teached relation to the overall veloc-
ity. It is included in measurement when its acceptance rate is over the limit again.
Path compensation is always active by default. No adaptation is required within the scope
of the commissioning.
In a 4-path system, the gas flow meter compensates for a failed measuring path and gives
a warning in case of failure. The measurement is still valid under legal metrology. If two or
more measuring paths fail, the measurement is invalid, the meter issues a corresponding
warning and increments the disturbance volume.
In a 8-path system, the gas flow meter compensates for a failed measuring path per
measuring plane and gives a warning in case of failure. According to this, two measuring
paths can fail, as long as they are not in the same measuring plane. If two or more
measuring paths per measuring plane fail, the measurement is invalid, the meter issues a
corresponding warning and increments the disturbance volume.
4.5 Sealing
After having completed the commissioning, seal the Signal Processing Unit (if required) in
accordance with the sealing plan (→ p. 35, §2.10).
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