Fujimoto Fuji Differential Pressure Transmitter FKK 4 - Manual (Page 59)

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It should be noted that leakage of fluid from the wetted parts would affect
the performance due to the progress of corrosion.
Important
Caution of installation
• Restriction on H
1
Liquid level is not proportional to the transmitter output at some points inside
the seal diaphragm.
Therefore, H
1
should be set higher than the value shown in the table below.
• In order to prevent vibration, the transmitter body should be installed at a
vibration-free place.
• Do not shock the seal diaphragm by hitting hard object against it, for example.
• Take care not to apply an excessive force to the flange during connection.
Minimum value of H
1
Flange size Non projection type Projection type
DN40 / 1 1/2” 30mm
DN50 / 2” 30mm 30mm
DN80 / 3” 55mm 40mm
DN100 / 4” 55mm 55mm