Set Up Pressure Compensation - Emerson Micro Motion 5700 Configuration And Use Manual

Term
Prior Zero
Manual Zero
Live Zero
Zero Stability
Zero Calibration
Zero Time
Field Verification Zero
Zero Verification
12.3

Set up pressure compensation

Pressure compensation adjusts process measurement to compensate for the pressure
effect on the sensor. The pressure effect is the change in the sensor's sensitivity to flow
and density caused by the difference between the calibration pressure and the process
pressure.
Tip
Not all sensors or applications require pressure compensation. The pressure effect for a specific
sensor model can be found in the product data sheet located at www.emerson.com. If you are
uncertain about implementing pressure compensation, contact customer service.
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Configuration and Use Manual
Definition
The zero value stored in the transmitter at the time a field zero calibration
is begun. May be the factory zero or a previous field zero.
The zero value stored in the transmitter, typically obtained from a zero
calibration procedure. It may also be configured manually. Also called
"mechanical zero" or "stored zero".
The real-time bidirectional mass flow rate with no flow damping or mass
flow cutoff applied. An adaptive damping value is applied only when the
mass flow rate changes dramatically over a very short interval. Unit = con-
figured mass flow measurement unit.
A laboratory-derived value used to calculate the expected accuracy for a
sensor. Under laboratory conditions at zero flow, the average flow rate is
expected to fall within the range defined by the Zero Stability value (0 ±
Zero Stability). Each sensor size and model has a unique Zero Stability val-
ue. Statistically, 95% of all data points should fall within the range defined
by the Zero Stability value.
The procedure used to determine the zero value.
The time period over which the Zero Calibration procedure is performed.
Unit = seconds.
A 3-minute running average of the Live Zero value, calculated by the
transmitter. Unit = configured mass flow measurement unit.
A procedure used to evaluate the stored zero and determine whether or
not a field zero can improve measurement accuracy.
Set up pressure compensation using the display
Set up pressure compensation using ProLink III
Set up pressure compensation using a web browser
Measurement support
(Section 12.3.1)
(Section 12.3.2)
(Section 12.3.3)
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