Product description
EF200F-C
12
2.8 Vibrations
The correct operation of the measuring system is not influenced by plant vibrations
vibration resistance (→see 16.8) Consequently, the sensors require no special measures
for attachment. If higher levels of vibration are expected, be sure to secure piping
before and after the flow meter.
2.9 Preventing Excessive Flow
To ensure long service life for the flowmeter, excessive instantaneous/ periodical flow
rates should be held below the flow meterʼs maximum flow rate. Failing to do so might
result in damage to the sensor. Special care is necessary for steam at startup when the
pressure is low, or when a valve is opened rapidly, such as by a solenoid valve, as
excessive instantaneous flow rates often occur.
2.10 Pulsating Influences
The ability of the flowmeter to measure correctly may be adversely affected if there are
large variations of pressure or pulsating pressure from compressors and/or soot blow-
ers. Use the procedures below to minimize pulsating pressures:
• Move the source of the pulsations to the downstream side of the flowmeter. Alterna-
tively, put as much distance as possible between the source and the flowmeter.
• Install a pulsation dampening device, such as a chamber.
• Close the valves before and after the flowmeter when there is no flow. (This is to
prevent false non-zero readings under zero-flow conditions.)
2.11 Prevent Mixed Phase Flow
This flowmeter is designed to measure both gases and liquids. However, accurate
measurement cannot be guaranteed when gases and liquids are mixed together (i.e.
gas-liquid mixed phase flow).
2.12 Ensure Pipe is Flooded
When measuring liquids ensure that the pipe is flooded, as this will have an influence on
the accuracy of flow rate measurements.
2.13 Bypass Lines
The installation of bypass lines can facilitate maintenance and inspections. When
installing a bypass line, use upstream and downstream valves of a type that does not
disturb the flow profile, and secure sufficient length of straight pipe.
