Fujimoto Fuji Differential Pressure Transmitter FKK 4 - Manual (Page 55)

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Cautions on impulse piping
• For liquid, the impulse pipes should have an upward slope of 1/10 or more between the
process connection and the transmitter to prevent accumulation of gas, etc. in the detect-
ing unit.
• For gas, the impulse pipes should have a downward slope of 1/10 or more between the
process connection and transmitter to prevent accumulation of moisture, etc. in the de-
tecting unit.
• Do not bent the impulse pipes acutely near the pressure outlet port, to prevent gas or drain
from staying in the pipe.
• Take care not to apply an excessive force to the transmitter during connection.
• In order to prevent vibration of the transmitter body and capillary from interfering with
output, the transmitter body should be installed at a vibration-free place and the capillary
should be fixed to a stable support.
• The impulse pipes used should be suitable for the working temperature, pressure, etc.
• When the measuring fluid is likely to freeze in the cover of the measurement chamber,
the cover needs to be warmed up with steam or a heater.