Emerson Micro Motion Configuration And Use Manual

9.3 Perform density offset calibration
Density offset calibration is used to verify or adjust the value of Density Offset. Density Offset is
always added to the measured density value after the density meter factor is applied, and
before other processing is performed.
• Perform density offset calibration using the display (Section 9.3.1)
• Perform density offset calibration using ProLink III (Section 9.3.2)
• Perform density offset calibration using the Field Communicator (Section 9.3.3)
9.3.1 Perform density offset calibration using the display
Density offset calibration is used to verify or adjust the value of Density Offset. Density Offset is
always added to the measured density value after the density meter factor is applied, and
before other processing is performed.
The default value of Density Offset is 0.
Restriction
Density offset calibration is available only when API referral or concentration measurement is
enabled on your meter. If neither of these is enabled, Density Offset must be entered manually.
Tip
Density offset calibration is the preferred method for calculating a density offset, because the
procedure automatically corrects the data to reference temperature and reference pressure. If this
procedure is available on your device, use it and do not set Density Offset manually.
Prerequisites
Ensure that your process is stable during the calibration procedure. Minimize variation in
density, temperature, flow rate, and fluid composition. Minimize aeration.
If concentration measurement is enabled on your meter, ensure that Active Matrix is set to
the matrix that you want to calibrate.
Following the procedures defined in ASTM 1298 or API 555, obtain a laboratory reference
value for the density of your process fluid at reference temperature and reference
pressure.
Procedure
1. Navigate to the Density Offset Calibration wizard: OFF-LINE MAINT > OFF-LINE CAL >
DENS CAL OFFSET and activate Select.
If concentration measurement is enabled, the active matrix is displayed. Activate
Scroll to continue. The current reference temperature is displayed.
2. Activate Scroll to move to the next step.
3. Enter the laboratory reference density and save it to the transmitter.
Measurement support
118 Micro Motion
®
Fork Density Meters (FDM)

Emerson Micro Motion Specifications

General

Category	Measuring Instruments
Manufacturer	Emerson
Brand	Micro Motion
Type	Coriolis Flow Meter
Output	4-20 mA, HART, Foundation Fieldbus, Profibus, Modbus
Power Supply	24 V DC
Material	Stainless Steel, Hastelloy
Process Connection	Flanged, Threaded
Certifications	ATEX, IECEx, CSA, SIL
Pressure Rating	Varies by model; up to 10, 000 psi (690 bar)
Temperature Range	Varies by model; -400 to 750°F (-240 to 400°C)