• Under conditions of forward flow, up to a velocity of 10 m/sec, the mA output varies
between 4 mA and 20 mA in proportion to the velocity.
• Under conditions of forward flow, if the velocity equals or exceeds 10 m/sec, the mA
output will be proportional to the velocity up to 20.5 mA, and will be level at
20.5 mA at higher velocity values.
Example: Flow Direction = Forward and Lower Range Value < 0
Configuration:
• Flow Direction = Forward
• Lower Range Value = −10 m/sec
• Upper Range Value = +10 m/sec
Result:
• Under conditions of zero flow, the mA output is 12 mA.
• Under conditions of forward flow, for velocity values between 0 and +10 m/sec, the
mA output varies between 12 mA and 20 mA in proportion to (the absolute value of)
the velocity.
• Under conditions of forward flow, if (the absolute value of) the velocity equals or
exceeds +10 m/sec, the mA output is proportional to the velocity up to 20.5 mA,
and will be level at 20.5 mA at higher velocity values.
• Under conditions of reverse flow, for velocity values between 0 and −10 m/sec, the
mA output varies between 4 mA and 12 mA in inverse proportion to the absolute
value of the velocity.
• Under conditions of reverse flow, if the absolute value of the velocity equals or
exceeds +10 m/sec, the mA output is inversely proportional to the velocity down to
3.8 mA, and will be level at 3.8 mA at higher velocity values.
Example: Flow Direction = Reverse
Configuration:
• Flow Direction = Reverse
• Lower Range Value = 0 m/sec
• Upper Range Value = 10 m/sec
Result:
• Under conditions of forward flow or zero flow, the mA output is 4 mA.
• Under conditions of reverse flow, for velocity values between 0 and +10 m/sec, the
mA output level varies between 4 mA and 20 mA in proportion to the absolute value
of the velocity.
• Under conditions of reverse flow, if the absolute value of the velocity equals or
exceeds 10 m/sec, the mA output will be proportional to the absolute value of the
velocity up to 20.5 mA, and will be level at 20.5 mA at higher absolute values.
Configure process measurement
42 Micro Motion
®
Compact Density Meters (CDM)
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