Emerson MICRO MOTION 2700 Manual de Instalação descarregar pdf (Página 168)

158 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters

Calibrating the Transmitter continued

The calibrations that you choose must be performed without interruption, in the order listed here.

Note: Before performing the calibration, record your current calibration parameters. If you are using

ProLink II, you can do this by saving the current configuration to a file on the PC. If the calibration

fails, restore the known values.

You can calibrate for density with ProLink II software or a Communicator.

C.3.1 Preparing for density calibration

Before beginning density calibration, review the requirements in this section.

Sensor requirements

During density calibration, the sensor must be completely filled with the calibration fluid, and flow

through the sensor must be at the lowest rate allowed by your application. This is usually

accomplished by closing the shutoff valve downstream from the sensor, then filling the sensor with

the appropriate fluid.

Density calibration fluids

D1 and D2 density calibration require a D1 (low-density) fluid and a D2 (high-density) fluid. You

may use air and water. If you are calibrating a T-Series sensor, the D1 fluid must be air and the D2

fluid must be water.

For D3 density calibration, the D3 fluid must meet the following requirements:

• Minimum density of 0.6 g/cm

• Minimum difference of 0.1 g/cm

between the density of the D3 fluid and the density of water.

The density of the D3 fluid may be either greater or less than the density of water

For D4 density calibration, the D4 fluid must meet the following requirements:

• Minimum density of 0.6 g/cm

• Minimum difference of 0.1 g/cm

between the density of the D4 fluid and the density of the

D3 fluid. The density of the D4 fluid must be greater than the density of the D3 fluid

• Minimum difference of 0.1 g/cm

between the density of the D4 fluid and the density of water.

The density of the D4 fluid may be either greater or less than the density of water

C.3.2 Density calibration procedures

To perform a D1 and D2 density calibration:

• With ProLink II, see Figure C-1.

• With a Communicator, see Figure C-2.

CAUTION

For T-Series sensors, the D1 calibration must be

performed on air and the D2 calibration must be

performed on water.

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Emerson MICRO MOTION 2700 Manual de Instalação Página 168